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  • 1
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    Nachmessungen im Bereich der Pasterze (Glocknergruppe) im Jahre 1983 (1983)
    Zeitschrift für Gletscherkunde und Glazialgeologie
    In:  EPIC3Innsbruck, Zeitschrift für Gletscherkunde und Glazialgeologie
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    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 2
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    Weekly reports for R.V. Polarstern expedition ANT-II/3 (1983-11-22 - 1983-12-27, Punta Arenas - Punta Arenas), German version (1983)
    Alfred Wegener Institute for Polar and Marine Research
    In:  EPIC3Alfred-Wegener-Institute for Polar- and Marine Research, Bremerhaven, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research
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    Publication Date: 2016-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Weekly Reports , notRev
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  • 3
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    Radiocarbon dates II (1983)
    Dating Laboratory, University of Helsinki
    In:  EPIC3Helsinki, Finland, Dating Laboratory, University of Helsinki
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    Publication Date: 2019-09-03
    Repository Name: EPIC Alfred Wegener Institut
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  • 4
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    Phytoplankton community response to river diversions in the Caernarvon-Breton Sound area (Louisiana): Seasonal effects of nutrient enrichments (2003)
    In:  EPIC3ERF Meeting: Estuaries on the Edge - Convergence of Ocean, Land and Culture, 2003
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    Publication Date: 2017-02-07
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 5
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    Figure 1 of: Mineralogy and composition of concentric layers within a manganese nodule from the North Pacific Ocean (1981)
    Marine Geology, Elsevier
    In:  EPIC3Amsterdam, Marine Geology, Elsevier
    Details
    Publication Date: 2016-10-04
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 6
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    Phytoplankton community response to nutrient enrichment in an estuarine coastal region influenced by pulsed water diversions (Caernarvon, Louisiana) (2003)
    In:  EPIC3ASLO Meeting, Salt Lake City, Salt Lake City, Ut, USA, 2003
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    Publication Date: 2017-02-07
    Repository Name: EPIC Alfred Wegener Institut
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  • 7
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    Benthic and pelagic nutrient cycling in a coastal Watershed influenced by river diversions (Caernarvon, Louisiana (2003)
    In:  EPIC3Estuarine Research Federation Meeting, Seattle, WA, USA, 2003
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    Publication Date: 2017-02-07
    Repository Name: EPIC Alfred Wegener Institut
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  • 8
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    Seasonal and spatial variability of major organic contaminants in solution and suspension of the Pomeranian Bight (2003)
    International Council for the Exploration of the Sea
    In:  EPIC3Copenhagen, Danmark, International Council for the Exploration of the Sea, 334 p., ISBN: ISSN 1017–619 5
    Details
    Publication Date: 2017-01-30
    Description: Studies of hexachlorocyclohexane-isomers (HCHs) and selected triazine herbicides in solution and suspension were carried out in the Pomeranian Bight in 1995. The concentrations of HCHs and triazines were determined by gas-liquid chromatography (GC) or by GC in connection with quadrupole mass spectrometry(GC/MS). Particulate and dissolved material were separated by means of an in-situ filtration/extraction system. The seasonal variability and regional distribution of the various components were investigated in January, April, July and September 1995. Their distribution in the western Pomeranian Bight is described. The concentrations of individual hexachlorocyclohexane-isomers were in the range of 100–1 000 pg l–1 in solution and 20 to 60 pg l–1 in suspension. The levels of the triazines in solution showed pronounced differences between the individual components (atrazine (2–20 ng l–1), simazine (5–30 ng l–1), terbuthylazine (〈 5 ng l–1)), but they were one order of magnitude higher compared with the hexachlorocyclohexane-isomers. The concentration of triazines in suspension was low, often below the limit of detection (25 pg l–1).
    Repository Name: EPIC Alfred Wegener Institut
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  • 9
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    Weekly reports for R.V. Polarstern expedition ANT-I/2 (1983-01-22 - 1983-03-24, Cape Town - Rio de Janeiro), German (1983)
    Alfred Wegener Institute for Polar and Marine Research
    In:  EPIC3Alfred-Wegener-Institute for Polar- and Marine Research, Bremerhaven, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research
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    Publication Date: 2015-12-02
    Repository Name: EPIC Alfred Wegener Institut
    Type: Weekly Reports , notRev
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  • 10
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    Vegetations- und siedlungsgeschichtliche Untersuchungen am Trentelmoor bei Peine (2003)
    Eberhard Grüger
    In:  EPIC3Göttingen, Eberhard Grüger
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    Publication Date: 2015-08-24
    Repository Name: EPIC Alfred Wegener Institut
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  • 11
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    Radiocarbon datings of sediment core Trentelmoor, Peine, Lower Saxony, Germany (2003)
    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
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    Publication Date: 2015-08-18
    Repository Name: EPIC Alfred Wegener Institut
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  • 12
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    Basal melt at NorthGRIP modeled from borehole, ice-core and radio-echo sounder observations (2003)
    INT GLACIOL SOC
    In:  EPIC3Annals of Glaciology, INT GLACIOL SOC, 37, pp. 207-212, ISSN: 0260-3055
    Details
    Publication Date: 2017-12-11
    Description: From temperature measurements down through the 3001 m deep borehole at the North Greenland Icecore Project (NorthGRIP) drill site, it is now clear that the ice at the base, 3080 m below the surface, is at the pressure-melting point. This is supported by the measurements on the ice core where the annual-layer thicknesses show there is bottom melting at the site and upstream from the borehole. Surface velocity measurements, internal radio-echo layers, borehole and ice-core data are used to constrain a time-dependent flow model simulating flow along the north-northwest-trending ice-ridge flow-line, leading to the NorthGRIP site. Also time-dependent melt rates along the flowline are calculated with a heat-flow model. The results show the geothermal heat flow varies from 50 to 200 mW m–2 along the 100km section of the modeled flowline. The melt rate at the NorthGRIP site is 0.75 cm a–1, but the deep ice in the NorthGRIP core originated 50 km upstream and has experienced melt rates as high as 1.1 cm a–1.
    Repository Name: EPIC Alfred Wegener Institut
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  • 13
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    Glazialmarine Sedimentation am westantarktischen Kontinentalrand (zentrales Bellingshausenmeer) im Verlauf des letzten Glazial- Interglazial-Zyklus (2003)
    Geographisches Institut
    In:  EPIC3Göttingen, Geographisches Institut
    Details
    Publication Date: 2018-05-07
    Repository Name: EPIC Alfred Wegener Institut
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  • 14
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    Translational diffusion of polymer chains with excluded volume and hydrodynamic interactions by Brownian dynamics simulation (2003)
    In:  EPIC3The Journal of Chemical Physics, 118(17), pp. 8061-8072, ISSN: 0021-9606
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    Publication Date: 2018-02-12
    Repository Name: EPIC Alfred Wegener Institut
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  • 15
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    Interaction of Contaminants and Nutrients-Possible Consequences for the Louisiana Shelf Plankton Community Structure - Annual Report, BORSF (2003)
    In:  EPIC3
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    Publication Date: 2017-02-08
    Repository Name: EPIC Alfred Wegener Institut
    Type: Miscellaneous , notRev
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  • 16
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    Benthic biogeochemistry: state of the art technologies and guidelines for the future of in situ survey (2003)
    In:  EPIC3Journal of Experimental Marine Biology and Ecology, 285-28, pp. 5-31, ISSN: 00220981
    Details
    Publication Date: 2017-03-06
    Description: Sediment and water can potentially be altered, chemically, physically and biologically as they are sampled at the seafloor, brought to the surface, processed and analysed. As a result, in situ observations of relatively undisturbed systems have become the goal of a growing body of scientists. Our understanding of sediment biogeochemistry and exchange fluxes was revolutionized by the introduction of benthic chambers and in situ micro-electrode profilers that allow for the direct measurement of chemical fluxes between sediment and water at the sea floor and for porewater composition. Since then, rapid progress in the technology of in situ sensors and benthic chambers (such as the introduction of gel probes, voltammetric electrodes or one- and two-dimensional optodes) have yielded major breakthroughs in the scientific understanding of benthic biogeochemistry. This paper is a synthesis of discussions held during the workshop on sediment biogeochemistry at the “Benthic Dynamics: in situ surveillance of the sediment–water interface” international conference (Aberdeen, UK—March 25–29, 2002). We present a review of existing in situ technologies for the study of benthic biogeochemistry dynamics and related scientific applications. Limitations and possible improvement (e.g., technology coupling) of these technologies and future development of new sensors are discussed. There are countless important scientific and technical issues that lend themselves to investigation using in situ benthic biogeochemical assessment. While the increasing availability of these tools will lead research in yet unanticipated directions, a few emerging issues include greater insight into the controls on organic matter (OM) mineralization, better models for the understanding of benthic fluxes to reconcile microelectrode and larger-scale chamber measurements, insight into the impacts of redox changes on trace metal behavior, new insights into geochemical reaction pathways in surface sediments, and a better understanding of contaminant fate in nearshore sediments.
    Repository Name: EPIC Alfred Wegener Institut
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  • 17
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    Oxygen uptake by aquatic sediments measured with a novel non-invasive eddy-correlation technique (2003)
    In:  EPIC3Marine Ecology Progress Series, 261, pp. 75-83, ISSN: 0171-8630
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    Publication Date: 2017-03-06
    Description: This paper presents a new non-invasive technique for measuring sediment O2 uptake that, in its concept, differs fundamentally from other methods used to date. In almost all natural aquatic environments, the vertical transport of O2 through the water column toward the sediment surface is facilitated by turbulent motion. The new technique relies on measuring 2 parameters simultaneously and at the same point in the water above the sediment: the fluctuating vertical velocity using an acoustic Doppler velocimeter and the fluctuating O2 concentration using an O2 microelectrode. From these 2 parameters, which typically are measured 10 to 50 cm above the sediment surface for a period of 10 to 20 min and at a frequency of 15 to 25 Hz, the vertical flux of O2 toward the sediment surface is derived. Based on measurements performed under actual field conditions and comparisons with in situ flux-chamber measurements, we believe that this new technique is the optimal approach for determining O2 uptake by sediments. The technique is superior to conventional methods as measurements are done under true in situ conditions, i.e. without any disturbance of the sediment and under the natural hydrodynamic conditions. Furthermore, this technique can be used for bio-irrigated or highly permeable sediments, such as sands, where traditional methods often fail. While this paper only focuses on O2 uptake by sediments, the technique can also be applied to other solutes that can be measured at a sufficiently high temporal resolution.
    Repository Name: EPIC Alfred Wegener Institut
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  • 18
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    Report on a shore collecting trip to the Azores (12 September-1 November 1979), including a list of collecting stations [CANCAP-Project] (1981)
    In:  Various articles (0523-7904) vol.61 (1981) p.1
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    Publication Date: 2018-08-14
    Keywords: oceanography ; zoogeography ; taxonomy ; collecting stations ; faunistic assemblages ; list ; Canary Islands ; Archipelago of Cape Verde ; Archipelago of Madeira ; Archipelago of the Azores ; North Africa ; North Atlantic Ocean ; CANCAP-Project
    Repository Name: National Museum of Natural History, Netherlands
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  • 19
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    New records of terricolous microlichens from southeast Greenland (1983)
    In:  Miscellaneous publications of the University of Utrecht Herbarium (1572-6592) vol.1 (1983) nr.1 p.49
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    Publication Date: 2015-05-08
    Description: Twelve species of terricolous microlichens from the Angmagssalik District, Southeast Greenland, are reported: Caloplaca friesii, C. livida, Lecanora boligera, Lecidea oligotropha and Leciophysma arctophila, which are new to the lichen flora of Greenland, Rinodina conradi, which is new to the eastcoast, and Baeomyces roseus, B. rufus, Buellia geophila, B. punctata, Caloplaca tornoensis and Mycoblastus tornoensis, new to Southeast Greenland. In a discussion of the greenlandic distribution, unpublished records from the herbarium of Copenhagen (C) are incorporated. Notes on the habitats are given and the pertinent phytosociological units indicated. Some morphological and anatomical characters are commented upon briefly.
    Repository Name: National Museum of Natural History, Netherlands
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  • 20
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    Studies on the flora of the Guianas 14. New taxa and combinations in Sorocea (Moraceae) and a key to its species (1983)
    In:  Miscellaneous publications of the University of Utrecht Herbarium (1572-6592) vol.1 (1983) nr.1 p.381
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    Publication Date: 2015-05-08
    Description: The 16 recognized species of Sorocea are listed with their synonyms and distribution. Two new taxa are described: S. steinbachii C.C. Berg and S. hirtella Mildbread ssp. oligotricha Akkermans & Berg. Three new combinations are made: S. muriculata Miquel ssp. uaupensis (Baillon) C.C. Berg, S. trophoides W. Burger ssp. rhodorachis (Cuatrecasas) C.C. Berg, and S. sprucei (Baillon) Macbride ssp. saxicola (Hassler) C.C. Berg. A key to the species is presented.
    Repository Name: National Museum of Natural History, Netherlands
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  • 21
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    A Biosystematic Study of Neohattoria herzogii (Hatt.) Kamim (1981)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.509 (1981) nr.1 p.23
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    Publication Date: 2015-05-08
    Description: Neohattoria Kamim. is a monotypic genus of the Jubulaceae (= Frullaniaceae) with a single species, N. herzogii (Hatt.) Kamim., known from central to northern Japan and the southern part of the Kurile Islands. The present genus was segregated from Frullania by Kamimura (1961; sub. nom. Hattoria Kamim. nom. illeg., non Schust., 1961) on the basis of the branching type, the shape of the first leaf and underleaf on branch, the total lack of secondary pigmentation, the uniform cell structure of the stem in cross section, and the strongly toothed leaf lobes. The generic concept of Neohattoria was greatly expanded by Schuster (1970), who included eight species and classified them into two subgenera, subgen. Neohattoria (with a single species) and subgen. Microfrullania Schust. (with seven species); however, Hattori et al. (1972) transferred all species of subgen. Microfrullania to a newly segregated genus Schusterella Hatt. et al., thus retaining the monotypic status of Neohattoria. As already described and illustrated by Hattori (1955), Kamimura (1961), Mizutani (1961), Ladyzhenskaja (1963), Schuster (1970), and Hattori et al. (1972), Neohattoria herzogii is closely related to species of both Jubula and Frullania. Regarding the taxonomic desposition of Neohattoria, Mizutani (1961) and Mizutani & Hattori (1969) placed it with Jubula in a subfamily Jubuloideae of Lejeuneaceae and Hattori et al. placed it in Jubulaceae (s. lat.). But, Kamimura (1961), Schuster (1970, 1979), and Guercke (1978) placed it more close to Frullania, e.g. in a subfamily Frullanioideae of Jubulaceae (s. lat.); more recently, Asakawa et al. (1979b), admitting three distinct families, Jubulaceae, Frullaniaceae, and Lejeuneaceae, placed Neohattoria and Jubula in the Jubulaceae (s. str.) but Frullania and Schusterella in the Frullaniaceae.
    Repository Name: National Museum of Natural History, Netherlands
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  • 22
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    The generic identity of Polypodium banaense (1983)
    In:  Miscellaneous publications of the University of Utrecht Herbarium (1572-6592) vol.1 (1983) nr.1 p.43
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    Publication Date: 2015-05-08
    Description: The species Polypodium banaense C.Chr. is transferred to Crypsinus. The recognition of a genus Phymatopteris Pic. Ser. (= Phymatopsis J.Sm.) separate from Crypsinus is discussed.
    Repository Name: National Museum of Natural History, Netherlands
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  • 23
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    A scanning electron microscopic study of the seed coat structure of Curtia Chamisso & Schlechtendahl and Hockinia Gardner (Gentianaceae) (1983)
    In:  Miscellaneous publications of the University of Utrecht Herbarium (1572-6592) vol.1 (1983) nr.1 p.33
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    Publication Date: 2015-05-08
    Description: The six species of Curtia, including a hitherto undescribed species published here, as well as the monotypic genus Hockinia can be distinguished from each other by the seed coat structure. The anticlinal walls and the cuticle provide the most useful information. Curtia tenuifolia appears to be a complex species, but subsp. tenella can be readily separated from this complex by the seed coat structure. Heterostyly has been found in C. tenuifolia subsp. tenuifolia, C. obtusifolia, and Hockinia montana, but differences in seed coat structure can not be correlated with long-, short-, and equal-styled flowers. The differences in seed coat structure, the length of the seeds, and the number of cells per seed plead for maintaining Hockinia (closely related to Curtia) as a distinct genus. One new species of Curtia is described and a new combination is made.
    Repository Name: National Museum of Natural History, Netherlands
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  • 24
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    Studies in Annonaceae VI. A leafanatomical survey of genera of Annonaceae in the Neotropics (1983)
    In:  Miscellaneous publications of the University of Utrecht Herbarium (1572-6592) vol.1 (1983) nr.1 p.17
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    Publication Date: 2015-05-08
    Description: SETTEN, A. K. van & KOEK-NOORMAN, J.: Studies in Annonaceae. VI. A leafanatomical survey of genera of Annonaceae in the Neotropics. — Bot. Jahrb. Syst. 108: 17—50. 1986. — ISSN 0006-8152. Within the scope of the multidisciplinary research project on systematics of Annonaceae, a survey of the leafanatomical features and their distribution in the neotropical Annonaceae is presented. The studied specimens form a rather homogeneous group, as may appear from the family description given here. A detailed study of the leafanatomical features reveals, that differences are mainly found in the indument, the position and contents of the idioblasts, the structure of the primary vein, the type of crystals in the epidermal cells, and the type of sclereids. Based on character states, phenetic similarities and differences are discussed and compared with the classifications of FRIES (1959) and WALKER (1971).
    Repository Name: National Museum of Natural History, Netherlands
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  • 25
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    Studies on the flora of the Guianas 20. The Dorstenia species (Moraceae) of south-eastern tropical America (1983)
    In:  Miscellaneous publications of the University of Utrecht Herbarium (1572-6592) vol.1 (1983) nr.1 p.133
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    Publication Date: 2015-05-08
    Description: One new species of Dorstenia from Brazil is described: D. carautae C.C. Berg, and four new combinations are made: D. cayapia Vellozo subsp. asaroides (Hooker) C.C. Berg, D. cayapia Vellozo subsp. paraguariensis (Hassler) C.C. Berg, D. cayapia Vellozo subsp. vitifolia (Gardner) C.C. Berg, and D. ramosa (Desvaux) Carauta, Valente & Sucre subsp. dolichocaula (Pilger) C.C. Berg. A list of and a key to the 22 Dorstenia species distinguished in south-eastern tropical America are presented, together with synonymy and distributional data.
    Repository Name: National Museum of Natural History, Netherlands
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  • 26
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    Project Systematics of Annonaceae (1983)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.516 (1983) nr.1 p.1
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    Publication Date: 2015-05-08
    Description: Recently a multidisciplinary investigation program on the systematics of Annonaceae was started at Utrecht with special emphasis on the Neotropics. This project will be carried out largely within the framework of the UNESCO-project Flora Neotronica. The first goal is to provide a modern classification of the family as a whole, the second is the publication of a series of monographs for Flora Neotropica. The project has been planned and started in close consultation with leading botanists on the Neotropical flora. The Annonaceae are a family of pantropical distribution with between 2000 and 2500 species in ca. 130 genera as presently understood. In the Neotropics the family is represented by ca. 750 species and 35 genera. It is a family of trees, shrubs, and lianas. Its place is within the order of the Magnoliales and its supposedly closest relative is the family of the Myristicaceae. The Annonaceae, although generally considered primitive in many features, nevertheless offer a number of specialized features as well This makes it a promising object using various kinds of comparative morphological, karyological, and anatomical data. Besides, many species are of medicinal or commercial value, such as various species of Annona and Rollinia, the fruits of which are commonly eaten in most countries of Central America and South America; the Soursop (Annona muricata) is widely cultivated throughout the tropics.
    Repository Name: National Museum of Natural History, Netherlands
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  • 27
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    Studies on the flora of the Guianas. II. A new species of Asterophorum (Tiliaceae) from Suriname (1983)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.524 (1983) nr.1 p.377
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    Publication Date: 2015-05-08
    Description: A new species of Asterophorum, A. mennegae, is described from the Sipaliwini Savanne (Suriname). The position of Asterophorum within the family is briefly reviewed, and a key to the 2 species is given.
    Repository Name: National Museum of Natural History, Netherlands
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  • 28
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    Studies on Lejeuneaceae subfam. Ptychanthoideae VI. A revision of Schiffneriolejeunea sect. Saccatae from Asia (1981)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.493 (1981) nr.1 p.71
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    Publication Date: 2015-05-08
    Description: The originally monotypic eastern Malaysian genus Schiffneriolejeunea Verdoorn 1933 has now become a widespread, pantropical group of about fifteen species by the inclusion of species from the genus Ptychocoleus Trev. nom. illeg. Six species are known from Asia, three of which constitute the sect. Saccatae (Verdoorn) Gradst. & Terken comb. nov. These are the widespread Schiffneriolejeunea tumida (Nees) Gradst., the eastern Malaysian S. cumingiana (Mont.) Gradst. and S. nymannii (Steph.) Gradst. & Terken comb. nov. Schiffneriolejeunea tumida is a rather polymorphic species in which two not sharply defined varieties may be distinguished: S. tumida var. tumida with more or less involuted leaf margins, and S. tumida var. haskarliana (Gott.) Gradst. & Terken comb. nov. with plane margins.
    Repository Name: National Museum of Natural History, Netherlands
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  • 29
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    The Vegetation of the Páramos of the Colombian Cordillera Oriental (1981)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.481 (1981) nr.1 p.1
    Details
    Publication Date: 2015-05-08
    Description: A phytosociological survey based on methods of the Zürich-Montpellier School was carried out in the páramo vegetation of the Cordillera Oriental, Colombia. The study area covers about 10,000 and comprises the páramo between the Nevado de Sumapaz (3°55'N, 4250 m), the Sierra Nevada del Cocuy (6°25'N, 5493 m) and the Páramo del Almorzadero (7°N, 4375 m). The páramo vegetation was studied along various altitudinal transects from the upper forest line (3000-3500 m) up to the lower limit of the snowcap (4800 m). A general description of the study area includes data on geology, geomorphology, soils, climate, flora, phytogeography, morphological characters of the vegetation, fauna and landuse. The evolution and Quaternary history of páramo vegetation and climate is reviewed, incorporating the first data from the Lateglacial and Holocene of the Páramo de Sumapaz. The general altitudinal zonation of the páramo vegetation was studied and is presented for both the dry and the humid side of the Cordillera. The zonal and azonal plant communities are described including their physiognomy, composition and syntaxonomy, habitat and distribution. Eighty five syntaxa from the rank of variant to that of the class are newly described, 17 of which are provisional. The vegetation is not ranked syntaxonomically yet, but described on the basis of preliminary tables. A number of azonal communities, part of them of lesser extent, are described in a similar way. The páramo vegetation is primarily determined by the tropical diurnal high mountain climate. The diversity of the páramo vegetation is related to temperature (altitudinal gradient) and to humidity (dry and wet climate). The presence of zonal bunchgrass páramo, bamboo-bunchgrass páramo or bamboo páramo mainly depends on the complex interrelation between these factors. Finally a synthesis is provided on ecology, morphology and phytogeography of the páramo vegetation of the study area.
    Repository Name: National Museum of Natural History, Netherlands
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  • 30
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    Wood and leaf anatomy of Opiliaceae (1983)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.533 (1983) nr.1 p.147
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    Publication Date: 2015-05-08
    Description: The wood and leaf anatomy of representatives of the 9 genera of the Opiliaceae are described in detail. It is possible to separate the genera on the base of both wood- and leaf anatomical characters. Herein the presence of cystoliths of varying shape and size is important. Some comments on the taxonomy and possible phylogeny of the familiy are given.
    Repository Name: National Museum of Natural History, Netherlands
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  • 31
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    Isoëtes Palmeri H.P. Fuchs, eine neue Isoëtes-Art des Páramo (1981)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.510 (1981) nr.1 p.165
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    Publication Date: 2015-05-08
    Description: Isoëtes Palmeri with a distribution in the High Andes from the Páramo of Venezuela to the Páramo of Ecuador is described as a new taxon, and dedicated to the then American specialist of the genus, Thomas Chalkley Palmer (1860-1934). The new species belongs to the tropical-Andeanaustral-antarctic section Laeves, described as new here as well. The publication of the new species had to be anticipated to the projected monographic treatment of the South-American representatives of the genus Isoëtes, as A.M. Cleef, Utrecht intends to base a new association, the Isoëtetum Palmeri on this new taxon, observed and collected by him at many instances within the Colombian Páramo between 1971 and 1980 in the context of the preparation of his doctoral thesis now under way.
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  • 32
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    Phylogenetic Systematics of the Polypodiaceae (Filicales) (1983)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.525 (1983) nr.1 p.321
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    Publication Date: 2015-05-08
    Description: In his introductory statements to 'The Symposium on the Phylogeny and Classification of the Filicopsida' which was held in London, 1972, HOLTTUM, when dealing with 'dubious groups of relationships which would particularly repay investigation', mentioned the Polypodiaceae first (HOLTTUM, 1973: 6). Talking about Polypodiaceae the present authors deal with the Polypodiaceae sensu stricto only, thus excluding the Cheiropleuriaceae, Dipteridaceae, Grammitidaceae, and also the Loxogrammaceae, taxa which were formerly (or are still) included in the Polypodiaceae sensu lato. As delineated in this way, this almost exclusively pantropical family consists of about 600 species and an indefinite number of genera.
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  • 33
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    A new species of Coussapoa (Cecropiaceae) from Peru (1983)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.521 (1983) nr.1 p.305
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    Publication Date: 2015-05-08
    Description: The new species Coussapoa manuënsis C.C. Berg is described.
    Repository Name: National Museum of Natural History, Netherlands
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  • 34
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    Chromosome studies on European species of the genera Aneura and Riccardia (Hepaticae) (1981)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht (2352-5754) vol.491 (1981) nr.1 p.19
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    Publication Date: 2015-05-08
    Description: Until recently relatively little attention has been paid to the study of chromosomes in liverworts. The first substantial contributions were made by Heitz (1927, 1928) and Lorbeer (1934). In the second half of this century chromosome studies on liverworts were mainly carried out in Europe (e.g. Fritsch 1972; Newton 1977, 1979) and Japan (e.g. Tatuno 1959; Segawa 1965a, b, c; Inoue 1968). Inoue (in Koponen 1979) reports that until now 28% of all bryophyte species in Japan have been investigated as to their chromosome complement. A comprehensive, but rather outdated, survey of chromosome numbers in Hepaticae and Anthocerotae was given by Berrie (1960). Work on a new, updated survey is now underway (Fritsch, in prep.). In the present article results are presented of a cytotaxonomic investigation of European species of the genera Aneura and Riccardia (Aneuraceae). Most specimens were gathered in the Netherlands, but some chromosome counts based on French and German plants are also included.
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  • 35
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    A new preparatory approach of decapod and thoracican crustaceans from the Middle Danian at Fakse, Denmark (2003)
    In:  Contributions to Zoology (1383-4517) vol.72 (2003) nr.2/3 p.141
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    Publication Date: 2015-05-08
    Description: Many papers on the taxonomy of fossil crustaceans are often based upon poorly preserved material and/or specimens that have been insufficiently prepared. The purpose of the present note is to outline some preparation methods that are applied in our (J.S.H. Collins and S.L.J.) ongoing studies of anomuran and brachyuran decapods from the Middle Danian limestones at Fakse quarry (Denmark), which have greatly enhanced the quality of our material. The techniques briefly outlined here involve: 1 – staining method; 2 – water blasting (as a cleaning tool in preparation of fossils); and 3 – negative preparation (with acid). Some of these techniques will have wide applications in other fields of paleontological research.
    Keywords: Preparation ; Crustacea ; Danian ; Denmark
    Repository Name: National Museum of Natural History, Netherlands
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  • 36
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    The clavobranchialis musculature in sarcopterygian fishes, and contribution to osteichthyan feeding and respiration (2003)
    In:  Contributions to Zoology (1383-4517) vol.72 (2003) nr.1 p.17
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    Publication Date: 2015-05-08
    Description: Various fossil lungfish taxa preserve distinct depressions on the smooth postbranchial lamina of the dermal pectoral girdle. These depressions are largely unknown in other sarcopterygian fishes, but are present in the rhizodont sarcopterygian Strepsodus. Comparisons with extant actinopterygian fishes suggest these depressions mark the point of origin for the clavobranchialis musculature, extending anterodorsally into the gill chamber to insert on the ventral surface of the ceratobranchial(s). Studios examining feeding and respiratory mechanisms of bony fishes (Osteichthyes) have emphasised the role of mandibular depression in generating negative pressures within the oral cavity to draw in water/air/food via suction. However, phylogenetically basal actinopterygians, fossil lungfish and other fossil sarcoptcrygians (such as Strepsodus) lack the apomorphies that increase suction among bony fishes. In these taxa the clavobranchialis muscles may serve to augment this negative pressure by retracting the ceratobranchials and increasing the size of the oral/ oropharyngeal cavity. A comparable action is performed by the chondrichthyan coracobranchiales muscles, particularly during feeding, and the function of these ventral gill arch muscles is likely to be a synapomorphy of jawed vertebrates (Gnathostomata). This musculature is absent from jawless vertebrates such as the Osteostraci.
    Keywords: Clavobranchiales ; Sarcopterygii ; Actinopterygii ; Chondrichthyes ; coracobranchiales ; Dipnoi
    Repository Name: National Museum of Natural History, Netherlands
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  • 37
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    Individual, local and subspecific variation in female Hermann’s tortoise (Testudo hermanni) reproductive characters (2003)
    In:  Contributions to Zoology (1383-4517) vol.72 (2003) nr.4 p.221
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    Publication Date: 2015-05-08
    Description: We studied reproductive characters of a population of the tortoise Testudo h. hermanni in the Plaine des Maures (Var), and compared these to another population in southern France and to T. h. boettgeri in Greece. Clutch characters, which are measures of total reproductive investment, showed no differences between subspecies or sites after body size correction by ANCOVA. Egg characters, which measure the division of this investment among offspring, did vary significantly among both subspecies and sites after correcting for body mass. The presence of such local variation should discourage relocation of the threatened T. h. hermanni even between populations of the same subspecies.
    Keywords: Egg production ; clutch characters ; conservation ; tortoise ; Testudo hermanni
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  • 38
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    The phylogeny, systematics and fossil record of the Goneplacidae MacLeay (Crustacea, Decapoda, Brachyura) revisited (2003)
    In:  Contributions to Zoology (1383-4517) vol.72 (2003) nr.2/3 p.147
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    Publication Date: 2015-05-08
    Description: We review the Goneplacidae and review the various alternative hypotheses concerning membership within the family. We offer a new cladistic based hypothesis of phylogenetic relationships within the group.
    Keywords: Crustacea ; Decapoda ; Brachyura ; Goneplacidae ; phylogeny ; systematics
    Repository Name: National Museum of Natural History, Netherlands
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  • 39
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    Interpreting ecology and physiology of fossil decapod crustaceans (2003)
    In:  Contributions to Zoology (1383-4517) vol.72 (2003) nr.2/3 p.111
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    Publication Date: 2015-05-08
    Description: Decapods are the most diverse and complex group of crustaceans, adapted for life in all parts of the marine environment, many aquatic habitats, and some terrestrial niches. With this diversity of life styles, a vast range of morphotypes of decapods has evolved, exploiting almost every imaginable variation in morphology of the complex exoskeleton that characterizes them. Many of the morphological variants are a response to exploiting a particular niche in which the organisms live or an adaptation to particular behavioral characteristics. Assessing the significance of morphological variation in the fossil record is challenging because of the taphonomic overprint that results in loss of soft tissue, preservation of partial remains of hard parts, and vastly reduced numbers of preserved individuals as contrasted to the once-living population. The purpose of the present paper is to identify aspects of morphology that may be useful in interpreting the behavioral responses of the organism to its environment, w,th primary emphasis on morphological features of the exoskeleton that are not expressed on all individuals but that occur at low, and unpredictable, frequencies.
    Keywords: Crustacea ; Decapoda ; Mesozoic ; Cenozoic ; behavior
    Repository Name: National Museum of Natural History, Netherlands
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  • 40
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    Variation in number of trunk vertebrae and in count of costal grooves in salamanders of the family Hynobiidae (2003)
    In:  Contributions to Zoology (1383-4517) vol.72 (2003) nr.4 p.195
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    Publication Date: 2015-05-08
    Description: Ten species from five genera of the family Hynobiidae were studied. The number of trunk vertebrae varied between 14 and 21, and the count of costal grooves ranged from 10 to 15. Both the within-species variation and the within-population variation were recorded in some species. In both kinds the values of the coefficient of variation were quite low. In Salamandrella keyserlingii, the south-eastern samples markedly differed from remaining ones. Among the hynobiids, the genus Onychodactylus (both species) and Batrachuperus mustersi have higher number of vertebrae in the anterior part of trunk (5 and 4, respectively, versus 3), and, thus, demonstrated a distinct position. The relation between the number of trunk vertebrae and the count of costal grooves was studied. The variation in number of trunk vertebrae across urodelan families was discussed.
    Keywords: Hynobiidae ; trunk vertebrae ; costal grooves
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  • 41
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    The spirits of Bali (1983)
    In:  Flora Malesiana Bulletin (0071-5778) vol.36 (1983) nr.1 p.3920
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    Publication Date: 2015-04-20
    Description: IUCN, says the paper Categories, Objectives and Criteria for Protected Areas, ”is dedicated to the wise use of the Earth’s natural resources and to the maintenance of the Planet’s natural diversity.” What to think of the sequence? Use first, maintain second? And this comes from the International Union for the Conservation of Nature and Natural Resources? ”The World National Parks Congress, taking place in Bali, Indonesia, October 11-22, 1982, will provide case studies from around the world to illustrate how the various categories of protected areas are meeting the needs of countries of all economic, social, cultural, and political backgrounds,” writes J.A. McNeely, the secretary of the Commission on National Parks and Protected Areas, in a special issue of the Swedish journal Ambio (11: 237. 1982). ”No longer just playgrounds for vacationers and means for conserving natural heritage, protected areas have become an inseparable part of the modern human ecosystem.”
    Repository Name: National Museum of Natural History, Netherlands
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  • 42
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    Personal news (1983)
    In:  Flora Malesiana Bulletin (0071-5778) vol.36 (1983) nr.1 p.3876
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    Publication Date: 2015-06-05
    Description: Mrs. Delia D. Adefuin, Museum Research Assistant, Manila, is pursuing her M.S. in Botany degree. She is currently the Secretary of the Fern Society of the Philippines. She is working on the Fern Flora of Metro Manila and is preparing the manuscript of a pictorial encyclopedia which will include descriptions of species and horticultural recommendations. Miss Barbro Axelius (S) collected and studied Xanthophytum and Lerchea (Rubiaceae) in Sarawak, Kalimantan and Sumatra, August 1982- February 1983.
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  • 43
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    Miscellaneous information (1983)
    In:  Flora Malesiana Bulletin (0071-5778) vol.36 (1983) nr.1 p.3896
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    Publication Date: 2015-06-05
    Description: Tropical Botany in Aberdeen University. This was started by Professor J.W.H. Trail, who held the chair from 1877 to 1919, and travelled in the Amazon Valley (1873-75) mainly collecting cryptogams and studying palms. He was succeeded by Prof. W.G. Craib (1920-33) who was never in the tropics but devoted his work to the Flora of Siam, based on the collections of A.F.G. Kerr, and assisted by Miss E.C. Barnett. After a considerable lag, tropical botany was revived by the energetic efforts of Dr. P. Ashton as lecturer in systematics and ecology of the eastern tropics, establishing ties with Malayan colleges in teaching and research. This is at present perpetuated by two lecturers, Dr. K. Jong and Dr. M.D. Swaine, the latter’s experience lying largely in the tropics of West Africa. In addition Dr. N.M. Pritchard, Dr. J.B. Kenworthy and Dr. G. Hadley have been on secondment to the University of Malaya, while Dr. I. Alexander made research visits to India, Ghana and Peru. Over the years the Department has provided undergraduate and research training to innumerable students from many different tropical countries, some of which attained responsible posts, e.g. Prof. E. Soepadmo. Important courses in tropical biology are given, not available elsewhere in the U.K. (started 1973). The benefits for Aberdeen students is important: amongst others they led to expeditions to various parts of the tropics, recently to Sabah and to the Ivory Coast. Royal Society Tropical Rain Forest Collaborative Research Programme. Arising out of a feasibility study by Dr. T.C. Whitmore and P.F. Cockburn, the theme ’Recovery of tropical rain forest after disturbance’ was adopted as the initial basis of the programme. Possible territories for the research include Sabah and the Philippines. Detailed plans for a 5-year project are being prepared in consultation with colleagues in Southeast Asia.
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  • 44
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    Editorial (1983)
    In:  Flora Malesiana Bulletin (0071-5778) vol.36 (1983) nr.1 p.3867
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    Publication Date: 2015-04-20
    Description: It is with the utmost regret that we announce the sudden and quite unexpected death of Dr. Marius Jacobs, editor of this Bulletin. See the obituary on page 3869. He was co-editor of the Flora Malesiana Bulletin for nr. 17 (1962) to nr. 22 (1968) and took full responsibility onwards of nr. 27 (1974). He showed great ability in enlarging its scope and we have many letters in our archives expressing appreciation and admiration for the lively and informative style in which he edited the Bulletin. I had to take over the editorial work for this number at short notice, but I was greatly helped by a number of Rijksherbarium colleagues, which help is gratefully acknowledged. In this way the delay has been kept to a minimum. It is, however, possible that some news items etc. have not been printed and that information submitted to Dr. Jacobs has not been entered due to this sudden change of editorship. I offer my apologies if this has happened and hope that (if still relevant) the news will again be forwarded to the new editor, Dr. J.F. Veldkamp, Rijksherbarium, who will take over starting next number.
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  • 45
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    Expeditions and other exploration (1983)
    In:  Flora Malesiana Bulletin (0071-5778) vol.36 (1983) nr.1 p.3885
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    Publication Date: 2015-04-20
    Description: The Botanical Survey of India continued to make collections during 1982, with the following results: Andaman & Nicobar Is.: Shola Bag, Mt Harriet, Jirkathang, Poona Nallah, Saddle peak, Diglipur, Rutland I. & Little I., 2875 specimens. Arunachal Pradesh: Various areas of Kameng Distr., Subansiri Distr., 9750 specimens. Assam: Garampani, 60 specimens. West Bengal: Darjeeling, Jalpaiguri, Hollong, Jaldapara, Chilapata, Salkumar, Daidaighat, Barasat, 2665 specimens. Bihar: Madhuban, Nimiaghat, Paresnath Hills, 315 specimens. Dehra Dun: Chakrata, Missoori, 325 specimens. Gujrat: Catchment and submergence areas of Sipu Reservoir Project, 1505 specimens. Kerala: Trichur, Idduki, Silent Valley, Valra Reserve Forest, Cannanore, Trivandrum, 3770 specimens. Madhya Pradesh: Kanha National Park, Chhodarpur Distr., 1190 specimens. Maharashtra: Areas of Jalgaon Distr. and Buldhana Distr., 4390 specimens. Manipur: Cherrapunjee, Mawphlong, Sorharim, areas of West Khasi Hills Districts, 2000 specimens. Rajasthan: Bharatpur, Desert National Park, 1605 specimens. Sikkim: Rangpo, Singtham, Bumbing, Manuring, Duga, Pandam, Takchi, Meli, areas of Gangtok, Chungtham, Lachi, Thanga, Panthang, 2590 specimens. Uttar Pradesh: Gori & Kali Valley, Chittoragarh Distr., 500 specimens.
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  • 46
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    Ultrastructure of Basidiospores. 1. Beenakia (1983)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi (0031-5850) vol.12 (1983) nr.1 p.67
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    Publication Date: 2015-04-20
    Description: The ultrastructure of the spore walls of Beenakia dacostae (Beenakiaceae, Gomphales) has been studied. Spore walls are mainly composed of a distinct episporium and a thick, dark, ornamented ectosporium. The general structure is identical with that of other members of the Gomphales, such as Gomphus and Ramaria
    Repository Name: National Museum of Natural History, Netherlands
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  • 47
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    Book reviews (2003)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi (0031-5850) vol.18 (2003) nr.2 p.238
    Details
    Publication Date: 2015-06-05
    Description: This book is dedicated to the world-known specialist in marine mycology, E. B. Gareth Jones on the occasion of his 65th birthday, for his substantial contribution to marine mycology. It contains 22 contributions by a multitude of authors, grouped around the central theme of Fungi in marine environments. The book is divided into three parts. Part 1 (organisms), contains contributions on fungal species: taxonomy, based on morphology as well as molecular characters, treating groups like the Oomycete genus Halophytophtora, and ascomycete groups like de Halosphaeriales, Loculoascomycetes, Lophiostoma and Massarina, as well as marine yeasts, and a contribution on anamorphteleomorph connections in marine ascomycetes. Part 2 is devoted to ecology, mainly to mangrove habitats and sea-grass communities, which harbour lots of marine fungi. Also the subject of endangered mangrove habitat is treated. Finally, Part 3 of the book deals with applied aspects of marine fungi, with contributions on secondary metabolites from marine fungi, bioremediation of coloured pollutants by terrestrial versus facultative marine fungi, fatty acids in Thraustochytrids, as well as molecular cloning of the isopenicillin synthase gene in the marine fungus Kallichroma tethys.
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  • 48
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    A new species of Sporothrix from Kuwait (1981)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi (0031-5850) vol.11 (1981) nr.3 p.392
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    Publication Date: 2015-04-20
    Description: During an ecological study of fungi of the tidal mudflats in Kuwait, a Sporothrix species has been recorded twice, in 1977 and 1980. It differs from other species of the genus (de Hoog, 1974, 1978) in several characters and is here described as a new species. A comparison with similar species of the genus is added.
    Repository Name: National Museum of Natural History, Netherlands
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  • 49
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    Notulae ad Floram agaricinam neerlandicam — XL. New combinations in Conocybe and Pholiotina (2003)
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi (0031-5850) vol.18 (2003) nr.2 p.225
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    Publication Date: 2015-04-20
    Description: Some new combinations in Conocybe are made and justified. The name Conocybe apala is proposed to replace the names C. albipes and C. lactea. Conocybe albipes var. pseudocrispa and C. moseri var. bisporigera are distinguished on the rank of species. On the other hand, Conocybe subalpina is reduced to a variety of C. pallida and C. rickenii to a forma of C. siliginea. In addition, three new combinations are made in Pholiotina on the rank of subsections.
    Repository Name: National Museum of Natural History, Netherlands
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  • 50
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    Review (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.2 p.260
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    Publication Date: 2015-03-06
    Repository Name: National Museum of Natural History, Netherlands
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  • 51
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    Supplementary data on Malesian Knema (Myristicaceae) including three new taxa (1981)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.27 (1981) nr.1 p.223
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    Publication Date: 2015-03-06
    Description: Among the collections of Knema acquired by the Rijksherbarium since the publication of my new account of the genus Knema, in Blumea 25, 1979: 321 — 478, a few specimens caused problems with the identification, and at closer examination these yielded facts of interest which are published here. Some specimens represented stages not yet known, for instance fruits, or male flowers, while other specimens meant a significant range extension of the species. Two new species and one new subspecies are described. For easy reference, the sequence and numbers of the species presently treated correspond with the numbers as used in the account of 1979. The new species bear the number of the species after which they appear in the general key of 1979, with the addition ‘-bis’.
    Repository Name: National Museum of Natural History, Netherlands
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  • 52
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    A S.E.M.-investigation on the development of free carpels (1981)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.27 (1981) nr.2 p.499
    Details
    Publication Date: 2015-03-06
    Description: The early development (ontogeny) of the carpels of 20 species belonging to 8 apocarpous families was investigated with the scanning electron microscope. The results indicate that on the floral apex a circular or a convex meristem develops into an obliquely ascidiate primordium by unequal growth of its periphery. By further unequal growth it develops into a young carpel. The terminal mouth of a cup becomes the lateral cleft of a carpel. The different forms of the young carpels in different species are defined by the varying degree of development of the adaxial region of the initial meristem and/or its margin on the side of the floral apex. This hypothesis is theoretically evaluated.
    Repository Name: National Museum of Natural History, Netherlands
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  • 53
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    A revision of the genus Tephrosia (Leguminosae-Papilionoideae) in Malesia (1983)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.28 (1983) nr.2 p.421
    Details
    Publication Date: 2015-03-06
    Description: In Malesia the genus Tephrosia is represented by 20 species, native or introduced and naturalized, including 6 subspecies and 5 varieties; 4 species are restricted to Malesia. Two of these species are newly described: T. barbatala and T. elliptica; the former includes one new variety (var. glabra). Two new subspecies and one new variety are distinguished: T. filipes subsp. longifolia, T. purpurea subsp. barbigera, and T. maculata var. elongata. Two taxa are given a new status: T. maculata var. appressepilosa and T. pumila subsp. aldabrensis. Four species, T. dichotoma, T. repentina, T. coarctata, and Kiesera sumatrana are for the first time sunk into synonymy. A key to the taxa, synonymy, and full descriptions with plates and distribution maps are given.
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  • 54
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    A new species of Blepharis Juss. (Acanthaceae) from Tamil Nadu, India (1983)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.28 (1983) nr.2 p.363
    Details
    Publication Date: 2015-03-06
    Description: During identification and study of the materials of the genus Blepharis Juss. in the Central National Herbarium (CAL) of the Botanical Survey of India the authors came across some specimens (Lawson 314) from Tavancore, which was identified as B. molluginifolia aff But critical study revealed that the typical molluginifolia is a different species from which the new taxon can be distinguished by several characters. The species is named after M.A. Lawson who collected the specimen for the first time.
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  • 55
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    Nepenthes izumiae (Nepenthaceae): a new species from Sumatra (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.1 p.179
    Details
    Publication Date: 2015-03-06
    Description: Nepenthes izumiae Troy Davis, C. Clarke & Tamin (Nepenthaceae), a new species from the Bukit Barisan, West Sumatra, Indonesia, is described.
    Repository Name: National Museum of Natural History, Netherlands
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  • 56
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    Miscellaneous notes on Thai Gramineae (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.3 p.495
    Details
    Publication Date: 2015-03-06
    Description: In recent collections of herbaceous grasses from Thailand some novelties were detected: Eremo- chloa maxwellii Veldk. and Parahyparrhenia laegaardii Veldk. New records for Thailand are: Eragrostis tenuifolia (Hochst.) Steud., Eulalia tetraseta Ohwi, Germainia thorelii A. Camus, Sporobolus tenuissimus (Schrank) Kuntze. A second collection after the type was made of Germainia pilosa Chai-Anan.
    Keywords: Eragrostis ; Eremochloa ; Eulalia ; Germainia ; Parahyparrhenia ; Sporobolus ; Gramineae ; Thailand
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  • 57
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    Structure and ontogeny of Stomata in Polypodiaceae (1981)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.27 (1981) nr.1 p.175
    Details
    Publication Date: 2015-03-06
    Description: The stomata as occurring on the fronds of the sporophytes of a large number of Polypodiaceae s.s. (Filicales) are investigated. A number of different stomatal types is recognised, (newly) described, and their ontogeny investigated. The different types of stomata are discussed in relation to their possible significance for tracing phylogenetic relationships in the Polypodiaceae following a cladistic analysis.
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  • 58
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    A new species of Millettia (Leguminosae–Papilionoideae) from West Africa (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.1 p.163
    Details
    Publication Date: 2015-03-06
    Description: Millettia liberica Jongkind (Leguminosae–Papilionoideae) from the forests of western Africa is described and illustrated.
    Repository Name: National Museum of Natural History, Netherlands
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  • 59
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    Flora Malesiana precursor for the treatment of Moraceae 2: Ficus subgenus Pharmacosycea section Oreosycea (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.2 p.289
    Details
    Publication Date: 2015-03-06
    Description: The position of Ficus subg. Pharmacosycea sect. Oreosycea and its subdivision are briefly discussed. A new subsection Glandulosae C.C. Berg is established. Five new species are described for the Malesian region: F. carinata, F. matanoensis, F. saruensis, F. sclerosycia, and F. subcaudata. Ficus pubinervis Blume and F. minor King are reduced to subspecies of F. nervosa Roth.
    Keywords: Moraceae ; Ficus subg. Pharmacosycea sect. Oreosycea ; Malesia
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  • 60
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    Florae Malesianae Praecursores LXV. Notes on Aristolochiaceae (1983)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.29 (1983) nr.1 p.223
    Details
    Publication Date: 2015-03-06
    Description: One new species of Aristolochia, A. singalangensis, from Sumatra is described here. This is the only Malesian species to have the fruit dehiscing from the apex towards the base. Remarks are given for some Asiatic and Malesian species, all belonging to Aristolochia except one to Thottea, on their taxonomy, nomenclature, typification, characteristics for identification, relationship, distribution, etc. The phenomena and significance of aristolochiaceous plants-butterflies relationship have been discussed. Germinated pollen grains have been found in dehisced anthers of open flowers in both Aristolochia and Thottea. Pollination of the Aristolochiaceae has been concisely reviewed.
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  • 61
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    A taxonomic revision of the genus Arthraxon Beauv. (Gramineae) (1981)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.27 (1981) nr.1 p.255
    Details
    Publication Date: 2015-03-06
    Description: A world-revision of Arthraxon Beauv. ( Gramineae) is presented. Three wide-spread species, A. hispidus (Thunb.) Makino, A. lanceolatus (Roxb.) Hochst., and A. lancifolius (Trin.) Hochst. are very variable and have caused the description of a great number of taxa, most of which are here reduced to synonomy. There are now 7 species and 9 varieties; for 6 of the latter new combinations are proposed. No new taxa are described.
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  • 62
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    Revision of the Malesian and Thai species of Sauropus (Euphorbiaceae: Phyllanthoideae) (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.2 p.319
    Details
    Publication Date: 2015-03-06
    Description: Fourteen species of Sauropus are recognised for Malesia, 21 for Thailand. Two species are described as new, S. asymmetricus of Sumatra and S. shawii of Borneo. Many new synonyms, especially for S. androgynus and S. rhamnoides, are provided. The latter two species have a much wider distribution than described before and both are difficult to separate from each other. A phylogeny based on morphological and palynological data proved futile, but showed that Sauropus together with Breynia and Glochidion are embedded in the paraphyletic Phyllanthus. Most species which formerly belonged to Synostemon and are now included in Sauropus are probably, with the exception of S. bacciformis, related to Breynia and Glochidion. Because of the poor phylogenetic results the circumscription of Sauropus is not changed (Synostemon still included), and an infrageneric classification is not provided.
    Keywords: Euphorbiaceae ; Sauropus ; Synostemon ; Malesia ; Thailand
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  • 63
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    Flora Malesiana precursor for the treatment of Moraceae 4: Ficus subgenus Synoecia (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.3 p.551
    Details
    Publication Date: 2015-03-06
    Description: The sections and subsections of Ficus subg. Synoecia are described and their Malesian species listed and keyed out. Six new species are described or established in the subgenus: F. cavernicola, F. colobocarpa, F. jacobsii, F. jimiensis, F. sohotonensis, and F. submontana. The combination F. disticha Blume subsp. calodictya (Summerh.) C.C. Berg is made and the lectotypes for F. alococarpa Diels and F. simiae H.J.P. Winkl. are designated.
    Keywords: Moraceae ; Ficus subg. Synoecia ; Malesia
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  • 64
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    Florae Malesianae Praecursores LXIII. New species of Malesian Aristolochiaceae (1983)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.28 (1983) nr.2 p.343
    Details
    Publication Date: 2015-03-06
    Description: There are only two genera of the Aristolochiaceae, Aristolochia and Thottea, so far known to occur in Malesia. In the course of a revision of this family for the Flora Malesiana, some new species of both genera have been found. Eight new ones of Thottea were published in a precursor on that genus (Blumea 27, 1981, 301-332, f. 1-72). There are four new species of Aristolochia from Borneo and one more new Thottea from Sumatra to be described here.
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  • 65
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    New species of Schizostachyum (Poaceae–Bambusoideae) from the Andaman Islands, India (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.1 p.187
    Details
    Publication Date: 2015-03-06
    Description: Two new species of Schizostachyum Nees: S. andamanicum and S. kalpongianum, are described and illustrated.
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  • 66
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    Contribution of micromorphology to the taxonomy of Abrus (Leguminosae–Papilionoideae) (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.1 p.153
    Details
    Publication Date: 2015-03-06
    Description: Despite the various taxonomic revisions of Abrus Adans., species and infraspecific delimitation are not always clear. In those revisions very little reference is made to micromorphological characters, in particular to those of the compound leaves, in spite of the stability of some of those characters. By using techniques of light and scanning microscopy this study reveals some interesting results concerning to leaflet surface, such as some of the characters of the epidermis cells, stomata, presence of papillae and trichomes. These characters show some range of variation at the species level but not at the subspecies level. We conclude that those structures can provide additional characters useful in Abrus for species and infraspecific segregation. This study also supports Breteler’s delimitation of the African Abrus species.
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  • 67
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    Review (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.2 p.318
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    Publication Date: 2015-03-06
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  • 68
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    The ascidiform early development of free carpels, a S.E.M.-investigation (1983)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.28 (1983) nr.2 p.231
    Details
    Publication Date: 2015-03-06
    Description: Carpels develop centripetally as oblique slightly ascidiform structures provided with a seat-like support. The terminal mouth of the ascidiform primordium becomes the lateral cleft of the carpel. Solitary terminal carpels develop as lateral structures. The sections Tasmannia and Drimys of the genus Drimys differ by the varying degree of ascidiform development. Austrobaileya is like Drimys. The structure of the carpel margins with submarginal placentation may have evolved from a slit like that in Winteraceae. Allometric development of an oblique ascidiform structure may have formed a large basal ovary, and may thus have moved the stigmatic part apically. A possible cupular origin of carpels is discussed.
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  • 69
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    Revision of the genus Phyllagathis (Melastomataceae: Sonerileae) II. the species in Borneo and Natuna Island (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.1 p.69
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    Publication Date: 2015-03-06
    Description: A revision of the genus Phyllagathis Blume is presented under a wider generic concept than used by earlier authors. This section of the revision will focus exclusively on the species in Borneo and Natuna Island. Eighteen species are endemic to Borneo, and only P. steenisii is endemic to Natuna Island, a small Indonesian island off the northern coast of Sarawak. One new species is described and several new combinations are established with the inclusion of pentamerous genera into Phyllagathis.
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  • 70
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    Notes on Malesian Fabaceae (Leguminosae–Papilionoideae). 10. The genus Alysicarpus (2003)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.48 (2003) nr.1 p.145
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    Publication Date: 2015-03-06
    Description: Alysicarpus Desv. is revised for the Flora Malesiana area. The recently described species A. aurantiacus Pedley is recorded for several localities in Papua New Guinea. Alysicarpus monilifer L. is recorded for Luzon (Philippines). The variability of A. vaginalis is discussed. A key for the Malesian species is presented.
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  • 71
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    Australia Expedition 1980; legit C.A.W. Jeekel and A.M. Jeekel-Rijvers. List of collecting stations, together with general notes on the distribution of Millipedes in eastern Australia and Tasmania (1981)
    In:  Verslagen en Technische Gegevens (0928-2386) vol.30 (1981) nr.1 p.1
    Details
    Publication Date: 2014-10-27
    Description: Owing to their limited possibilities for either active or passive dispersal, their association with the soil habitat, their vulnerability towards a dry atmosphere, and, in fact, on account of their general ecology and ethology, Diplopoda among arthropods are surely one of the most important classes in relation to the study of historical biogeography. For the class as a whole the sea appears to be an unsuperable barrier as is proved by the almost complete absence of endemic taxa on oceanic islands. In many cases lowland plains also act as severe obstacles against the dispersal of millipedes. The presence or absence of diplopods on islands or continents, therefore, may give a strong argument in favour or against any supposed former land connection. The long geographical isolation of the Australian continent and the absence of endemic higher taxa seems to imply that most, if not all, of its diplopod fauna dates from the time this continent was solidly attached to other southern continents, i.e. the Mesozoic. Subsequent penetration of fauna elements from the north or northwest seems utterly unlikely, although perhaps not entirely impossible.
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  • 72
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    The Lesser Antillean scorpions of the genus Centruroides (1983)
    In:  Studies on the Fauna of Curaçao and other Caribbean Islands (0166-5189) vol.65 (1983) nr.1 p.55
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    Publication Date: 2014-10-27
    Description: The buthid scorpions of the genus Centruroides are widely distributed in the Antillean area. They are also the most common scorpions in the majority of these islands. Nevertheless they remained almost forgotten until recently (STAHNKE 1970; ARMAS 1976, 1977, 1980, 1981, 1982; FRANCKE & SISSOM 1980). For the purpose of this paper the Lesser Antilles are defined as the islands situated between the Virgin Islands and Trinidad & Tobago, according to BOND’S 1978 zoogeographical point of view.
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  • 73
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    On the role of Yttrium during plurifacial Hercynian metamorphism as expressed in the Northern part of the Central galician schist Area (NW Spain) (1981)
    In:  Leidse Geologische Mededelingen (0075-8639) vol.52 (1981) nr.1 p.116
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    Publication Date: 2014-10-27
    Description: Recent investigations of the distribution of trace elements in metamorphic index minerals of metapelites have revealed, that the plurifacial character of the Hercynian metamorphism in this area is confirmed by the distribution of Yttrium in Hercynian garnets of the metamorphic series.
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  • 74
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    Geological map of the southern Cantabrian Mountains, 1: 50000: Sheets Carrion, Yuso, and geological cross-section (Without explanatory text) (1983)
    In:  Leidse Geologische Mededelingen (0075-8639) vol.52 (1983) nr.2 p.511
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    Publication Date: 2014-10-27
    Repository Name: National Museum of Natural History, Netherlands
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  • 75
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    Carboniferous subduction complex in the South Portuguese zone Coeval with basement reactivation and uplift in the Iberian Massif (1981)
    In:  Leidse Geologische Mededelingen (0075-8639) vol.52 (1981) nr.1 p.109
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    Publication Date: 2014-10-27
    Description: The formation of thick piles of flysch-like sediments needs the existence of narrowed seas, active denouement of neighbouring continents, and generalized marginal subsidence. These conditions are present during the initial and final stages of Wilson’s perceptive cycle. In this context, the Late Precambrian flysch of the Iberian Massif must be related to the initial rifting, whilst the Culm of southwestern Iberia was accumulated during an episode of Upper Palaeozoic subduction that remained active after the impingement of Iberia against North America. Culm sediments shed from the uplifted collision zone and fed into a remnant ocean that remained at the nonsutured southern border of Iberia. This model of synorogenic flysch formation has been described elsewhere for similar plate arrangements. On other grounds this model provides a framework that explains the different structural and magmatic trends of the Ossa-Morena Zone (near the active margin) in the context of the rest of the Massif (basement reactivation). In addition to this, it seems to support a partly primary origin for the Iberian arc versus a secondary origin.
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  • 76
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    The Upper Devonian deposits in the northern part of Leon (Cantabrian Mountains, Northwestern Spain) (1983)
    In:  Leidse Geologische Mededelingen (0075-8639) vol.52 (1983) nr.2 p.179
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    Publication Date: 2014-10-27
    Description: During the Late Devonian, deposition in the Cantabrian Mountains was largely controlled by movements along faults. By way of intermitting subsidence of the area south of the Sabero-Gordón line and the connected progradation of the coast during the Frasnian and early Famennian, three regressive sequences were deposited. On account of these sequences the Nocedo Formation is divided into three units. Before the late Famennian transgression, after which the upper part of the Ermita Formation was deposited, the area was peneplained. Six facies maps show the changes in palaeogeography during the Late Devonian.
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  • 77
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    The geology of the region to the southeast of Lugo (N.W. Spain) (1983)
    In:  Leidse Geologische Mededelingen (0075-8639) vol.52 (1983) nr.3 p.513
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    Publication Date: 2014-10-27
    Description: The area described comprises the SE plunging extension of the anticlinorium of Mondoñedo-Lugo-Sarria and several structural units to the NE of it. The stratigraphy compares with that of neighbouring areas. Certain new observations have been made regarding the west flank of the East Galician-West Asturian miogeosyncline at the end of the Precambrium and during the Early Palaeozoic. Stromatolites or algae played an important part in the formation of carbonate deposits during late Precambrian (Cándana limestone) and Lower Cambrian time (Vegadeo limestone). An imprint, possibly attributable to a specimen belonging to the Precambrian Ediacara fauna, was found in the Cándana Schist Formation. A shallow or relatively high zone existed during that time in the region around Incio. The same general area formed a high again at the end of the Ordovician, causing erosion and a marked disconformity of the Silurian. The Hercynian structures can be explained by assuming roughly WSW-ENE compression and shortening. In the NW of the area this is expressed in the first place by the recumbent folds of the Lugo-Sarria anticlinorium, and in the SE by the narrowness of the steep folds and their slightly changed direction in the general area of Seoane and El Cebrero. Normal crossfaults are related to the folding and the compression. They show locally a deviation in accordance with the direction of shear stress. Horizontal displacement along such faults in an EW direction was probably of little importance. Finally a few observations are given on the occurrence of Pb-Zn ores at the mine of Rubiales.
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  • 78
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    Distribution and variation of Carinariidae and Pterotracheidae (Heteropoda, Gastropoda) of the Amsterdam Mid North Atlantic Plankton Expedition 1980 (1983)
    In:  Beaufortia (0067-4745) vol.33 (1983) nr.6 p.73
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    Publication Date: 2014-10-27
    Description: Species of the heteropod families Carinariidae and Pterotracheidae collected in the Mid North Atlantic Ocean in 1980 have been studied. The distribution of the species is given, as well as the morphological variation. It is concluded that two subspecies of Carinaria lamarcki actually have to be considered distinctly recognisable and sympatric species, to be called C. lamarcki and C. challengeri. The vertical distribution of the heteropods studied proves not to be restricted to the photic zone and diurnal vertical migration occurs among the larger species. The horizontal distribution of the two Carinaria species and of at least two populations of the Pterotrachea species coincides with the southern branch of the North Atlantic Current, while others are restricted to the subtropical waters. Consequently, the present heteropods have to be considered good indicators of water masses and currents.
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  • 79
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    Excretion and respiration of the Antarctic krill Euphausia superba (1983)
    In:  EPIC3Polar biology, 1, pp. 205-209
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    Publication Date: 2019-07-17
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    Die Antarktis-Expedition von MS "Polarbjörn" 1982/83 (Sommerkampagne zur Atka-Bucht und zu den Kraul-Bergen) (1983)
    In:  EPIC3Reports on Polar Research, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 13, 79 p.
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    Publication Date: 2019-07-17
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  • 81
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    The dynamic tensile strength of ice and ice-silicate mixtures (1983)
    In:  EPIC3Journal of Geophysical ResearchB2, 88, pp. 1197-1208
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    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
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  • 82
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    Sinking speed, density and size of Euphausiid eggs (1983)
    In:  EPIC3Meeresforsch, 30, pp. 1-9
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    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
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  • 83
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    Joint biological Expedition on RRS "John Biscoe", February 1982 (II) (1983)
    In:  EPIC3Reports on Polar Research, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 11, 40 p.
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    German Antarctic Expedition 1980/1981 with FRV "Walther Herwig" and RV "Meteor" (1983)
    In:  EPIC3Reports on Polar Research, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 15, 59 p.
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  • 85
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    Regime of the Filchner-Ronne Ice Shelves, Antarctica (1983)
    In:  EPIC3Nature, 302, pp. 582-586
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    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
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  • 86
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    Congo Fan Neogene and Quaternary sedimentation: Interplay of riverine and current induced deposition (2003)
    In:  EPIC3Wefer, G., Mulitza, S., and Ratmeyer, V. (eds), The South Atlantic in the Late Quaternary: reconstruction of material budget and current systems. Berlin, Heidelberg, New York : Springer., pp. 279-293
    Details
    Publication Date: 2019-07-16
    Description: The incorporation of information regarding sedimentation rates and lithology from ODP Leg 175 Sites 1075, 1076 and 1077 into the analysis and interpretation of high-resolution seismic reflection data led to the revision and refinement of a depositional model for the upper Congo Fan area presented earlier by Uenzelmann-Neben (1998). The main sediment contributor to the upper fan was determined for four time slices since the Eocene (Late Oligocene - Miocene/Pliocene, Pliocene - 600 ky, 600 ky - ~160 ky, ~160 ky - Recent). Thus we can say that input of sediments from the north dominated the area in the Late Paleogene by either a south setting current or the Kouilou/Niari River. This situation continued to the period Pliocene - 600 ky when southern sediment sources (the Congo River and upwelling) became dominant, with the material being deflected to the north by the Benguela Current. As a sediment source on the upper fan, upwelling became even more important after 600 ky while the main sediment load of the Congo River is guided to the middle and lower fan via the Congo Canyon.
    Repository Name: EPIC Alfred Wegener Institut
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  • 87
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    Moult cycle and morphogenesis in Hyas araneus larvae (Decapoda, Majidae), reared in the laboratory (1983)
    In:  EPIC3Helgoländer Meeresuntersuchungen, 36, pp. 285-302
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    Publication Date: 2019-07-17
    Description: Moult cycle and morphogenesis in larval instars (zoea I, zoea II, megalopa) of the spider crab Hyas araneus were studied in the laboratory. Changes in the epidermis and cuticle were documented photographically at daily intervals to characterize the stages of the moult cycle. Stage A (early postmoult) is a very short period during which the larva takes up water. During late postmoult (B) and intermoult (C) the endocuticle is secreted, and there is conspicuous epidermal tissue condensation and growth. The onset of early premoult (D sub(0)) is characterized by epidermal apolysis, occurring first at the bases of the setae in the telson of zoeal instars or in the rostrum of the megalopa.
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  • 88
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    Effects of early starvation periods on zoeal development of brachyuran crabs (1981)
    In:  EPIC3BIOLOGICAL BULLETIN, 161, pp. 199-212
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    Publication Date: 2019-07-17
    Description: Larvae of the crabs Menippe mercenaria Say (Menippidae), Panopeus herbstii Milne-Edwards, Neopanope sayi Smith (Xanthidae), Sesarma cinereum Bosc (Grapsidae), and Libinia emerginata Leach (Majidae) were reared in the laboratory. Starvation periods different in length and timing within the first zoeal stage were studied as to their effects on later development and survival rate. After 1-3 days of initial feeding, most larvae had accumulated enough reserves to reach the second stage, independently of further food availability. The development of the survivors was delayed in the following stages, and their later mortality rate was higher than the fed controls. Starvation periods commencing directly after hatching of the larvae exert far stronger negative effects than those beginning later. All observations suggest a particularly sensitive phase in the beginning of larval life in brachyurans. When initial starvation periods exceed the point-of-no-return (PNR), the larvae will die later, even if feeding begins long before the energy reserves are depleted. Temporary lack of suitable prey may be an ecological factor controlling the survival of crab larvae as effectively as physical factors.
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  • 89
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    Starvation resistence in first stage zoeae of brachyuran crabs in relation to temperature (1981)
    In:  EPIC3JOURNAL OF CRUSTACEAN BIOLOGY, 1, pp. 518-525
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    Publication Date: 2019-07-17
    Description: Resistance to starvation in early larval stages of six species of brachyuran crabs representing four families was observed at various constant temperatures. In the optimal temperature range of 25-30°C for these warm temperate crab larvae, survival time of starved zoeae was longer than the development duration time in fed zoeae, while at lower temperatures the relationship of these two duration periods became inversed. This response pattern is found in larvae of the mud crab Rhithropanopeus harrisii and is considered to be typical for warm temperature brachyuran larvae. It indicates that reserved utilization is strongly controlled by temperature, but not to the same degree as development.
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  • 90
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    Changes in biomass and chemical composition of spider crab (Hyas araneus) larvae reared in the laboratory (1983)
    In:  EPIC3Marine Ecology Progress Series, 12, pp. 91-101
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    Publication Date: 2019-07-17
    Description: Larval and early post-larval growth has been investigated in H. araneus L. (Majidae) reared in the laboratory. Growth was measured as dry weight (DW), ash-free dry weight (AFDW), carbon (C), nitrogen (N), hydrogen (H), gross biochemical constituents (protein, lipid, carbohydrate, chitin, ash) and energy (calculated separately from carbon and biochemical composition). During larval development, i.e. from freshly hatched zoea-I to late megalopa, all these criteria of biomass increase by factors ranging between 5 and 14; carbohydrate shows the lowest, chitin the highest increment. There are indications of loss in organic body weight during the latest period preceding metamorphosis to the crab stage. When no food is offered during this time, megalopae lose significantly more biomass than control larvae. This suggests that food is still required, but feeding activity is reduced to a level below maintenance ingestion rate. Following metamorphosis, the juvenile crab accumulates biomass at a far higher absolute rate (expressed as µg/d) than all larval stages.
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  • 91
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    Three-dimensional glacier surface velocities of the Storstrømmen glacier, Greenland derived from radar interferometry and ice-sounding radar measurements (2003)
    In:  EPIC3Journal of Glaciology, Vol. 49, No. 165, pp. 201-209, ISSN: 0022-1430
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    Publication Date: 2019-07-17
    Description: Non-steady-state vertical velocities of up to 5 m y-1 exceed the vertical surface-parallel-flow components over much of the ablation area of Storstrømmen, a large outlet glacier from the East Greenland ice sheet. Neglecting a contribution to the vertical velocity of this magnitude, results in substantial errors (up to 20%) also on the south north component of horizontal velocities derived by satellite synthetic aperture radar interferometry (InSAR) measurements. In many glacier environments the steady-state vertical velocity component required to balance the annual ablation rate is 5 to 10 m y-1 or more. This indicates that the surface parallel flow assumption may be problematic also for glaciers in steady state. Here we derive the three-dimensional surface velocity distribution of Storstrømmen by using the principle of mass conservation to combine InSAR measurements from ascending and descending satellite tracks with airborne ice-sounding radar measurement of ice thickness. The results are compared to InSAR velocities previously derived by using the assumption of surface parallel flow, and to velocities obtained by Inin-situ GPS measurements. The velocities derived by using the principle of mass conservation are in better agreement with the GPS-velocities than the previously calculated velocities derived with the assumption of surface parallel flow.
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    Sequential parameter estimation for stochastic systems (2003)
    In:  EPIC3Nonlinear Processes in Geophysics 10, pp. 253-259
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    Publication Date: 2019-07-17
    Description: The quality of the prediction of the dynamical system evolutionis determined by the accuracy to which initial conditions andforcing are known. Availability of future observations permitsreducing the effects of errors in assessment the external modelparameters by means of a filtering algorithm. However, traditionalfiltering schemes do not take into account uncertainties in specifyingthe internal model parameters and thus cannot reduce their contributionto the forecast errors. An extension of the Sequential ImportanceResampling filter (SIR) is proposed to this aim. The filter is verifiedagainst the Ensemble Kalman filer (EnKF) in application to the stochasticLorenz system. It is shown that the SIR is capable to estimatethe system parameters and to predicts the evolution of the system witha remarkably better accuracy than the EnKF. This highlights a severedrawback of any Kalman filtering scheme: due to utilizing only first twostatistical moments in the analysis step it is unable to deal withprobability density functions badly approximated by the normaldistribution.
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    Polycystine radiolarians in the GreenlandIcelandNorwegian Seas: Species and assemblage distribution (2003)
    In:  EPIC3Sarsia, 88(1), pp. 65-88
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    Publication Date: 2019-07-17
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    Representation of Greenland ice sheet surface climate in the HIRHAM regional climate model (2003)
    In:  EPIC3Journal of Climate, Vol. 16, No. 6, pp. 1302-1319
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    Publication Date: 2019-07-16
    Description: Annual cycles and multi-year summer simulations of Greenland ice sheet surfaceclimate are made with the 0.5 degree horizontal resolution regional climate modelHIRHAM. The model results are compared with meteorological and energy balanceobservations from 15 Greenland Climate Network (GC-Net) automatic weatherstations. The model reprouces the surface climate, often within model andobservational uncertainty. However, the presence of numerous systematic modelbiases have been identified. Improving the representation of the model orographywould constitute a major improvement of the simulation of the Greenland ice sheetsurface climate, for biases in parameters such as temperature and pressure arelinked with elevation errors, not physical model error. The modeled near surface airtemperatures are warmer compared to observations, resulting primarily from thepoor resolution of the near surface layer and near surface temperature inversion.A more advanced planetary boundary layer scheme for Arctic conditions yieldedpromising results in a sensitivity run. Additional model warm bias is linked withnegative albedo bias which leads to a positive net shortwave bias. Negative albedobias is caused by a insufficient ice sheet elevation representation (-190 m averageorography bias) that results in warmer temperatures. Surface sensible heat fluxes are overestimated,likely due to model warm bias and too great wind speed. Latent heat fluxes in the model arealso larger than calculated from GC-Net measurements, indicating more evaporation than observationssuggest. Furthermore, the bulk model for evaporation neglects the majority ofwater vapour deposition, particularly at high elevations. Annual maps and total massflux of precipitation and evaporation are analyzed in context of results in literature.Based on the results of a multi parameter comparison, numerous recommendationsfor further model development are made.
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    Sequential weak constraint parameter estimation in an ecosystem model (2003)
    In:  EPIC3Journal of Marine Systems, 43, pp. 31-49
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    Publication Date: 2019-07-16
    Description: A Sequential Importance Resampling filter is applied to assimilate dataof the Bermuda Atlantic Time-series Study for the periodDecember 1988 to January 1994 into a 9-compartments ecosystemmodel. The filter provides an opportunity to combine state and parameterestimations. We detected notable seasonality of some model parameters.A filtered solution is in close agreement with the data and is superiorto that obtained with fixed model parameters. The seasonal dependenceof the initial slope of the P-I curve agrees with other known estimates.The seasonality of the phytoplankton specific mortality rate obtainedcan point out that either the phytoplankton mortality parameterizationhas to be improved or the Chl:C ratio varies in time. Being of the samecomputational cost as the Ensemble Kalman filter, the data assimilationapproach used can be implemented for on-line tuning and operationalprediction the ecosystem dynamics with a coupledhydrodynamical-ecosystem model.
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    Environmental history of the southeastern South Atlantic since the middle Miocene: evidence from the sedimentological records of ODP Sites 1088 and 1092 (2003)
    In:  EPIC3Sedimentology, 50, pp. 511-529
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    Publication Date: 2018-08-10
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    Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae) on two Namibian sandy beaches (2003)
    In:  EPIC3Estuarine coastal and shelf scienceS, 58, pp. 105-115, ISSN: 0272-7714
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    Publication Date: 2019-07-16
    Description: Population structure, growth and production of the surf clam Donax serra (Bivalvia, Donacidae) inhabiting highly exposed sandy beaches of Namibia, were investigated between November 1997 and December 1999. From length-frequency distribution and tagging-recapture data a von Bertalanffy growth function with an asymptotic length (L*) of 82 mm and a growth constant (K) of 0.274 y-1 was established. Regarding growth performance of Donacidae, D. serra fits in a group of species inhabiting cold-temperate and upwelling regions. The intertidal biomass of the studied population ranged between 141 g ash free dry mass (AFDM) m-2 y-1 and 546 g AFDM m-2 y-1. Individual production was maximal at 56.5 mm shell length (0.83 g AFDM ind.1 y1) and annual production ranged between 167 g AFDM m-2 y-1 and 637 g AFDM m-2 y-1, resulting in productivity values (P/B) between 1.167 y-1 and 1.589 y-1. This data underlines the importance of D. serra for the beach/surf ecosystem. Further the findings of this study are crucial to support future aquaculture or exploitation activities and management.
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  • 98
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    Reconstruction of glacial/interglacial changes in the global carbon cycle from CO2 and d13CO2 in Antarctic ice cores (2003)
    In:  EPIC3Memoirs of the National Institute for Polar Research, 57, pp. 121-138
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    Publication Date: 2019-07-17
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  • 99
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    Modern terrigenous organic carbon input to the Arctic Ocean (2003)
    In:  EPIC3In: Stein, R. and Macdonald, R.W. (Eds.) Organic Carbon Cycle in the Arctic Ocean: Present and Past. Springer Verlag, Berlin. p., pp. 33-55
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    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
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    Net accumulation of the Greenland ice sheet: High resolution modeling of climate changes (2003)
    In:  EPIC3Geophysical Research Letters, 30(9), 1485 p.
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    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
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