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  • Other Sources  (19)
  • Institut für Polarökologie Kiel  (8)
  • Oxford Univ. Press  (7)
  • Cambridge University Press
  • Institut für Meereskunde Kiel
  • 2000-2004  (19)
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  • 2004  (19)
  • 1
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    Renormalization Methods: A Guide for Beginners (2004)
    Oxford Univ. Press
    In:  New York, 330 pp., Oxford Univ. Press, vol. 1, no. 1, pp. 65-66, (ISBN 0-19-850694-5)
    Details
    Publication Date: 2004
    Keywords: Textbook of physics ; critical ; phenomena, ; elementary ; particles, ; phase ; transitions, ; Ising
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Fundamentals of Seismic Wave Propagation (2004)
    Cambridge University Press
    In:  Cambridge, 264 pp., Cambridge University Press, vol. 42, no. 3, pp. 632 pp., (ISBN 052)
    Details
    Publication Date: 2004
    Keywords: Textbook of geophysics ; Seismology ; Wave propagation ; Ray seismics ; Anisotropy ; Acoustics ; Elasticity ; Layers ; Cagniard ; Inversion ; WKBJ ; Maslov ; Born ; Kirchhoff ; Migration of earthquakes ; Inhomogeneity ; more ; advanced ; than ; Aki ; and ; Richards ; MATLAB
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Physiologische Anpassungen polarer Großalgen an abiotische Stressfaktoren - ein neues Arbeitsgebiet am IPÖ Kiel (2004)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 20 . pp. 5-6.
    Details
    Publication Date: 2017-05-05
    Type: Article , NonPeerReviewed
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  • 4
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    Expedition an das weiße Meer, Russland (2004)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 20 . pp. 7-13.
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    Publication Date: 2017-03-17
    Type: Article , NonPeerReviewed
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  • 5
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    Impacts of Grazing on Soil Physical Properties as a Result of Reindeer Herding in Northern Scandinavia (Workpackage 9.1) (2004)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 20 . pp. 25-38.
    Details
    Publication Date: 2020-06-25
    Type: Article , NonPeerReviewed
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  • 6
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    Integrative Analysis and Modelling in the RENMAN project (Workpackage 5) (2004)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 20 . pp. 46-48.
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    Publication Date: 2017-05-05
    Type: Article , NonPeerReviewed
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  • 7
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    Epidermal transmittance for UV-B radiation in arcticalpine vascular plant species (2004)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 20 . pp. 2-4.
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    Publication Date: 2017-05-05
    Type: Article , NonPeerReviewed
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  • 8
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    Changing microbial ecology with changing management (Workpackage 9.0) (2004)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 20 . pp. 17-24.
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    Publication Date: 2017-05-05
    Type: Article , NonPeerReviewed
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  • 9
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    Semi-domesticated Reindeer in Fennoscandia - a Risk to Human Health? (Workpackage 9.2) (2004)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 20 . pp. 39-45.
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    Publication Date: 2017-05-05
    Type: Article , NonPeerReviewed
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  • 10
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    RENMAN - The Challenges of Modernity for Reindeer Management: Integration and Sustainable Development in Europe's Subarctic and Boreal Regions (an introduction to the reports of the workpackages from Kiel University) (2004)
    Institut für Polarökologie Kiel
    In:  Mitteilungen zur Kieler Polarforschung, 20 . pp. 14-16.
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    Publication Date: 2017-05-05
    Type: Article , NonPeerReviewed
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  • 11
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    Laser 40Ar39Ar ages of single detrital white mica grains related to the exhumation of Neoproterozoic and Late Devonian high pressure rocks in the Southern Urals (Russia) (2004)
    Cambridge University Press
    In:  Geological Magazine, 141 (2). pp. 161-172.
    Details
    Publication Date: 2020-07-31
    Description: Single grains of detrital white mica from two different synorogenic sediments in the Southern Urals were analysed using the in situ ultraviolet laser ablation Ar–Ar dating technique to discriminate between age signatures associated with a high-pressure signal (phengites) from those related to muscovite only. Two disparately aged sandstone formations of Neoproterozoic (Upper Vendian) and Upper Devonian (Famennian) age were formed by the erosion of high-relief source areas with contemporaneously exhumed high-pressure rocks. A bimodal distribution of ages and chemical compositions can be detected in the two detrital populations. There is no age overlap between the two populations, reflecting completely different source areas containing high-pressure rocks of different ages.Within the Upper Vendian sandstones, detrital white mica from a 571–609 Ma age group is phengitic in composition (Si 3.3–3.41 per formula unit), while an older 645–732 Ma age group is comprised of muscovite composition grains only. The first group is compatible with the time of late exhumation and emplacement of a source area containing high-pressure rocks, the Neoproterozoic Beloretzk terrane. The older age range is compatible with a long history of cooling and the allochthonous nature of this terrane. Detrital white mica from the Famennian sandstones(Zilair Formation) comprises one age group (342–421 Ma) containing phengite (Si 3.21–3.39 per formula unit) and muscovite, and a second group (446–496 Ma) containing muscovite only. While the derivation of the second group cannot be correlated with any as yet known regional data, the first age group indicates the earliest arrival of high-pressure rocks at the surface along the suture zone after Late Devonian arc–continent collision.
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  • 12
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    Spatio-temporal distribution of Oithona similis in the Bornholm Basin (Central Baltic Sea) (2004)
    Oxford Univ. Press
    In:  Journal of Plankton Research, 26 . pp. 1-10.
    Details
    Publication Date: 2018-06-04
    Description: Oithona similis is an abundant but poorly studied cyclopoid copepod in the brackish Central Baltic Sea. We describe the spatio-temporal distribution of O. similis in a Central Baltic deep basin (Bornholm Basin) during spring and summer 1999. Using vertically resolving sampling in parallel with hydrographic measurements, we found the copepod to dwell in the permanent halocline characteristic of a Central Baltic deep basin. The habitat of O. similis is thus limited from above by low salinity and from below by low oxygen conditions, both characteristic for the area. Horizontally resolving sampling yielded abundance surfaces which were compared by analysis of variance showing similar patterns among sampling dates. Comparison with flow fields from a three-dimensional hydrodynamic model suggests that the horizontal distribution is primarily the result of circulation in the dwelling depth. The study shows how the physical environment in the area determines the spatial distribution which might affect abundance and production of this copepod.
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  • 13
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    Seasonal variations of bacterial abundance and biomass and their relation to phytoplankton in the hypertrophic tropical lagoon Ciénaga Grande de Santa Marta, Colombia (2004)
    Oxford Univ. Press
    In:  Journal of Plankton Research (26). pp. 1429-1439.
    Details
    Publication Date: 2018-06-01
    Description: The seasonal development of bacteria was studied in the hypertrophic coastal lagoon Ciénaga Grande de Santa Marta (Caribbean coast of Colombia). This large but only 1.5 m deep lagoon is subject to strong seasonal variations of salinity from almost fully marine (April/May) to brackish conditions in October/November. Chlorophyll ranged from 6 to 182 μg L−1, and gross primary production amounted to 1690 g C m−2 per year. Total bacterial number (TBN) ranged from 6.5 to 90.5 × 109 cells L−1 and bacterial biomass (BBM) from 77 to 1542 μg C L−1, which are among the highest ever reported for natural coastal waters. Neither TBN nor BBM varied significantly with salinity, phytoplankton or seston concentrations. Only the bacterial mean cell volume showed a significant relation to salinity, being highest (0.066 μm3) during the period of increasing and lowest (0.032 μm3) during decreasing salinity. Bacterial protein accounted for 24% (19–26%) and phytoplankton protein for 57% (53–71%) of total seston protein. The ratio (annual mean) of bacterial carbon to phytoplankton carbon was 0.44 (range 0.04–1.43). At low phytoplankton abundance [chlorophyll a (Chl a) 〈 25 μg L−1], bacterial carbon was almost equal to phytoplankton biomass (i.e. the mean ratio was 1.04). In contrast, at Chl a 〉 100 μg L−1, BBM was low compared to phytoplankton biomass (the mean ratio was 0.16). In general, BBM varied less than phytoplankton biomass. Most probably, the missing correlation between bacterial and phytoplankton variables was due to (i) organic material partly derived from allochthonous sources serving as food resource for bacteria and (ii) a strong resuspension of bacteria from the sediment caused by frequent wind-induced mixing of the very shallow lagoon.
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  • 14
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    Hydrothermal ageing of oceanic crust: inferences from seismic refraction and borehole studies. (2004)
    Cambridge University Press
    In:  In: Hydrogeology of Oceanic Lithosphere. , ed. by Davis, E. E. and Elderfield, H. Cambridge University Press, Cambridge, pp. 128-150. 1 ISBN 0521819296
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    Publication Date: 2012-02-23
    Type: Book chapter , PeerReviewed
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  • 15
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    A new 'turbulence incubator' for measuring primary production in non-stratified waters (2004)
    Oxford Univ. Press
    In:  Journal of Plankton Research, 26 (3). pp. 357-369.
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    Publication Date: 2019-09-23
    Description: The so-called ‘turbulence incubator’ overcomes an essential disadvantage of static in situ incubations where at high irradiances an artificial photoinhibition is caused by neglecting turbulent mixing in the upper water column. It is operated on deck and simulates the changing light conditions for vertically mixed phytoplankton cells by moving the sample bottles horizontally through a circular water bath covered by a glass lid of neutral optical density filters. In this way the exponentially decreasing irradiance within the euphotic zone is simulated and photoinhibition near the surface is avoided. A crucial point is the choice of revolution rate for simulating turbulent mixing under natural conditions. The incubator is characterized by its handy size, a relatively simple and inexpensive construction and a battery-driven motor. It can thus even be operated on small vessels without an electric generator. The incubator is especially suited for vertically mixed waters such as shallow bays, tidal estuaries and rivers. Its reliability was successfully tested by a simultaneous comparison with in situ measurements at various stations representing different water types and environmental conditions, ranging from the turbid River Elbe to the clear open Baltic Sea. In 9 out of 11 experiments, higher primary production rates were obtained in the turbulence incubator than in static in situ incubations. The majority of the latter were characterized by a pronounced photoinhibition in the upper two incubation depths representing the 100 and 50% light levels. The average rate increase amounted to 22%, with a range between 11 and 53% depending on light attenuation and irradiance.
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  • 16
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    Summer vertical distribution of paralarval gonatid squids in the northeast Pacific (2004)
    Oxford Univ. Press
    In:  Journal of Plankton Research, 26 (8). pp. 851-857.
    Details
    Publication Date: 2021-08-03
    Description: The vertical distribution patterns of paralarvae from several abundant cephalopod taxa were examined from depth-stratified tows in the northeast Pacific (44–56°N, 145–165°W) during three summer surveys in 1999–2001. A total of 309 cephalopods representing 10 taxa in three families were collected. Gonatid squids composed 97% of the total catch, and the most numerous taxa were Berryteuthis anonychus (59% of the total catch), Gonatus spp. (21%) and Gonatopsis borealis (17%). B. anonychus and Gonatus spp. were both most abundant in the upper 20 m; catches of both taxa varied significantly with depth and were significantly higher above the thermocline than in and below the thermocline. Gonatopsis borealis was collected mostly between 20 and 50 m, and catches were significantly higher in the thermocline than above and below the thermocline. Paralarvae of the three major taxa showed no evidence of diel vertical migration. Mantle lengths of Gonatus spp. and G. borealis each varied significantly with depth, and Gonatus spp. showed a strong positive correlation between mantle length and depth.
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  • 17
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    Age and growth of the ommastrephid squid Todarodes sagittatus from the western Mediterranean Sea (2004)
    Cambridge University Press
    In:  Journal of the Marine Biological Association of the United Kingdom, 84 (2). pp. 421-426.
    Details
    Publication Date: 2021-08-27
    Description: Age and growth of Todarodes sagittatus were estimated based on statolith analysis from individuals (N=352; 81–418 mm mantle length) caught by bottom trawlers during a year of sampling in the western Mediterranean. The daily nature of statolith increments was indirectly validated comparing the mean age of consecutive monthly modes (identified on the monthly length–frequency distributions) with the corresponding increase of 30 days. In agreement with other ommastrephids, results confirmed the following points: (1) lifespan lasts nearly a year; (2) growth rates decrease with age; (3) when adult, females have higher growth rates than males; and (4) females mature about a month later than males. Significant correlation was found between hatching (which occurred throughout the year but with a peak in November) and temperature at 50 m depth (where it is thought that hatchlings inhabit). Age and growth results were compared with those obtained in a similar work carried out in north-west Africa (Arkhipkin et al., 1999). Comparisons suggested that due to higher growth rates in juveniles, southern populations reach maturity and consequently decrease somatic growth at younger ages and smaller sizes than northern squid, which attain larger sizes as a result of maintaining fast growth and delaying maturation. Greater growth rates in juveniles from west Sahara could be explained by higher temperatures in this area than in the Mediterranean.
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  • 18
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    Feeding selectivities and food niche separation of Acartia clausi, Penilia avirostris (Crustacea) and Doliolum denticulatum (Thaliacea) in Blanes Bay (Catalan Sea, NW Mediterranean) (2004)
    Oxford Univ. Press
    In:  Journal of Plankton Research, 26 . pp. 589-603.
    Details
    Publication Date: 2018-06-04
    Description: Selectivity-size spectra, clearance and ingestion rates and assimilation efficiencies of Acartia clausi (Copepoda), Penilia avirostris (Cladocera) and Doliolum denticulatum (Doliolida) from Blanes Bay (Catalan Sea, NW Mediterranean) were evaluated in grazing experiments over a wide range of food concentrations (0.02–8.8 mm3 L−1 plankton assemblages from Blanes Bay, grown in mesocosms at different nutrient levels). Acartia clausi reached the highest grazing coefficients for large algae 〉70 μm (longest linear extension), P. avirostris for intermediate food sizes between 15 and 70 μm, and D. denticulatum for small sizes from 2.5 to 15 μm. Penilia avirostris and D. denticulatum acted as passive filter-feeders. Acartia clausi gave some evidence for a supplementary raptorial feeding mode. Effective food concentration (EFC) decreased linearly with increasing nutrient enrichment for D. denticulatum and followed domed curves for A. clausi and for P. avirostris with maximum values at intermediate and high enrichment levels, respectively. Clearance rates of crustacean species showed curvilinear responses with narrow modal ranges to increasing food concentration. Clearance rates of D. denticulatum increased abruptly and levelled into a plateau at low food concentrations. Mean clearance rates were 13.9, 25.5 and 64.1 mL ind.−1 day−1, respectively. No clearance could be detected for A. clausi at food concentrations 〈0.1 mm3 L−1 and for P. avirostris at food concentrations ≤0.02 mm3 L−1. Ingestion rates indicate a rectilinear functional response for A. clausi and for P. avirostris and showed a sigmoidal curve for D. denticulatum. Mean ingestion rates were 1.3, 2.8 and 7.7 μg C μg Cind.−1 day−1, respectively. Conversion of ingested carbon to tissue was 30–80% for the investigated crustaceans and 20–50% for doliolids. Food niche calculations suggest that food niche separation may explain the coexistence of the three species in summer in Blanes Bay.
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  • 19
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    δ〈sup〉15〈/sup〉N signatures of marine zooplankton and seston size fractions in Kiel Fjord, Baltic Sea (2004)
    Oxford Univ. Press
    In:  Journal of Plankton Research, 26 . pp. 495-500.
    Details
    Publication Date: 2018-06-04
    Description: The δ15N of marine mesozooplankton species was measured on four occasions. Significant differences were found between copepods and meroplanktonic larvae, yet not between holoplanktonic species. On average, mesozooplankton was enriched by 3.4 ± 0.9‰ relative to selected seston size fractions. Despite suggesting small differences (∼0.5 to 1‰) in the δ15N of different phytoplankton taxa on one occasion, the size fractionation procedure generally proved inadequate in separating major taxonomic groups composing seston. This circumstance, and phase-shifts in the transmission of rapid changes (〉2‰) in seston δ15N to mesozooplankton complicate the calculation of mesozooplankton trophic levels.
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