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  • 2025-2025  (23)
  • 2015-2019  (880,309)
  • 2018  (880,309)
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  • 1
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    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 63, pp. 20-25
    Publication Date: 2024-06-20
    Description: A new species, Thunbergia impatienoides, was discovered from Thailand and is here described. Detailed descriptions including pollen and seed morphologies, distribution, ecology and illustration are provided.
    Keywords: new species ; pollen ; Thailand ; Thunbergia
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 2
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    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 63, pp. 26-30
    Publication Date: 2024-06-20
    Description: A new species, Rubus ramachandrae, from Upper Subansiri district of Arunachal Pradesh, India is described and illustrated. It is closely similar to R. stipulosus and R. fuscifolius but differs by densely bristly or hirsute branches; narrowly ovate or oblong-lanceolate leaves with caudate-acuminate apex and adaxially hirsutulous vesture; abaxially grey tomentose intermixed with hirsutulous hairs; larger size of stipules and bracts with distinct margin and vesture; smaller size of floral structure. The distinct foliar as well as floral morphology of R. ramachandrae differs from all previously described species of Rubus. Differences in key morphological characters of R. ramachandrae, R. stipulosus and R. fuscifolius are also tabulated. In addition, pollen morphology is described based on light (LM) and scanning electron (SEM) microscopy. Based on the presence of straggling shrubby habit, free stipules, simple leaves, reflexed and strong needle shaped prickles, the new taxon is assigned to Rubus subg. Malachobatus. An image of the type specimen; digital images of habit, stipule, inflorescence and flower, a detailed illustration and scanned electron microscope images of pollens are provided.
    Keywords: India ; new taxa ; pollen morphology ; Rosaceae ; Rubus ; subgenus Malachobatus
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 3
    Publication Date: 2024-06-20
    Description: Empogona jenniferae is described from the upper quartzitic slopes of Mt Chimanimani on both sides of the Zimbabwe-Mozambique border, a prospective Tropical Important Plant Area. Its conservation status is assessed as Critically Endangered under the 2012 IUCN criteria. A figure and notes on the endemic plant species of Chimanimani are provided. Two additional names in Empogona, E. congesta and E. congesta subsp. chasei are published.
    Keywords: conservation ; new combinations ; TIPA ; Tricalysia ; Tropical Important Plant Area
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 4
    Publication Date: 2024-06-20
    Description: Georg Eberhard Rumphius (1627–1702), author of the monumental work Herbarium Amboinense (1741–1755) is seen as the undisputed patriarch of Malesian Natural Sciences. Until recently, it was thought that if Rumphius had collected any specimens, they all had been lost. The recent digitisation and revision of two book herbaria in Leiden collected by Paul Hermann (1646–1695) on Ceylon revealed four specimens with reference to either Rumphius or Ambon in Hermann’s handwriting: Colocasia esculenta, Gomphrena globosa, Helminthostachys zeylanica and Biophytum sensitivum, of which the latter does not occur in Sri Lanka. Here we discuss the description of these species in both published and unpublished historic works and consider the possibility that they may represent the only extant herbarium material attributable to Rumphius.
    Keywords: Ambon ; Biophytum sensitivum ; Colocasia esculenta ; Gomphrena globosa ; Helminthostachys zeylanica ; Herbarium Amboinense ; Hermann ; Rumphius ; Sri Lanka
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 5
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    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 63, pp. 1-10
    Publication Date: 2024-06-20
    Keywords: memoriam ; Veldkamp ; Jan-Frits
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 6
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    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 63, pp. 54-66
    Publication Date: 2024-06-20
    Description: A taxonomic revision of the genus Sapranthus is presented. Within the genus Sapranthus 8 species are recognized, 2 of which are new. Distinguishing morphological characteristics are discussed, and a dichotomous key to all species is given. The species treatments include descriptions, full synonymy, geographical and ecological notes, vernacular names, and taxonomic notes. Distribution maps are presented of all species, and a complete identification list of exsiccatae examined is included.
    Keywords: Annonaceae ; descriptions ; morphology ; Neotropics ; phylogeny ; Sapranthus ; taxonomy ; vernacular names
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 7
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    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 63, pp. 31-53
    Publication Date: 2024-06-20
    Description: In preparing the treatment of Dracaena for Flore du Gabon and Flore d’Afrique centrale, a relatively high number of taxonomic and nomenclatural novelties were discovered; these are presented here. Within Dracaena five species and one forma are described as new, D. bushii, D. haemanthoides, D. marina, D. wakaensis, D. waltersiae and D. laxissima forma aureilicia. Each new species is provided with a full description and taxonomic notes. Apart from that, five species are reinstated, D. braunii, D. nitens, D. perrottetii, D. tholloniana and D. usambarensis. A further 23 names are treated here as a synonym for the first time: D. bequaertii, D. buettneri, D. cuspidibracteata, D. densifolia, D. gabonica, D. gazensis, D. ledermannii, D. letestui, D. litoralis, D. longipetiolata, D. monostachya var. angolensis, D. oddonii, D. perrottetii var. minor, D. poggei, D. pseudoreflexa, D. reflexa var. buchneri, D. rubroaurantiaca, D. soyauxiana, D. talbotii, D. tessmannii, D. usambarensis var. longifolia, D. vanderystii and Pleomele heudelotii, while for four names a neotype and for 14 names a lectotype has been designated. Distribution maps are provided for a total of 23 species. An index of taxon names is included.
    Keywords: Africa ; Central Africa ; Dracaena ; Gabon ; Lucky Bamboo ; new species ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 8
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    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 63, pp. 67-86
    Publication Date: 2024-06-20
    Description: A taxonomic revision of the genus Desmopsis is presented. Within the genus Desmopsis 25 species are recognized, 9 of which are new, with one new combination. Distinguishing morphological characteristics are discussed, and a dichotomous key to all species is given. The species treatments include descriptions, full synonymy, geographical and ecological notes, vernacular names, and taxonomic notes. Distribution maps are presented of all species, and a complete identification list of exsiccatae examined is included.
    Keywords: Annonaceae ; descriptions ; Desmopsis ; morphology ; Neotropics ; phylogeny ; taxonomy ; vernacular names
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 9
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    PANGAEA
    In:  Supplement to: Fuchs, Matthias; Grosse, Guido; Jones, Benjamin M; Strauss, Jens; Baughman, Carson A; Walker, Donald A (2018): Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska. arktos - The Journal of Arctic Geosciences, 4(1), https://doi.org/10.1007/s41063-018-0056-9
    Publication Date: 2024-06-20
    Description: This data set describes the soil core and sample characteristics from the Ikpikpuk and Fish Creek river delta on the Arctic Coastal Plain in northern Alaska. The collection of the permafrost soil cores and the analysis of the samples are described in Fuchs et al. (2018). Sedimentary and geochemical characteristics of two small permafrost-dominated Arctic river deltas in northern Alaska. This data compilation consists of two data set. The first data set describes the properties of the collected permafrost soil cores from the Ikpikpuk river (IKP) and Fish Creek river (FCR) delta. This includes the coordinates of the nine coring locations, the field measurements of the active- and organic layer thickness at the coring locations, and the length of the collected permafrost core. In addition, soil organic carbon and soil nitrogen stocks and densities derived from the laboratory analyses for the reference depths 0-30 cm, 0-100 cm, 0-150 cm and 0-200 cm are presented in kg C m-2 and in kg C m-3. The second data set provides the raw laboratory data for all the samples of the nine collected permafrost cores in the Ikpikpuk and Fish Creek River Delta. All laboratory analyzes were carried out at the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam. The third data set presents the results from the radiocarbon dating of chosen samples from five different permafrost cores. This includes the AMS radiocarbon date and the calibrated age of a sample. In addition, the sediment and organic carbon accumulation rates for the dated samples are included. This data set allows to calculate the total carbon and nitrogen storage in two small Arctic river deltas (IKP and FCR) for the first two meter of soil and enlarges the available permafrost cores for Arctic river delta deposits.
    Keywords: AWI_PerDyn; Permafrost Research (Periglacial Dynamics) @ AWI; PETA-CARB; Rapid Permafrost Thaw in a Warming Arctic and Impacts on the Soil Organic Carbon Pool
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 10
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    PANGAEA
    In:  Supplement to: Boike, Julia; Nitzbon, Jan; Anders, Katharina; Grigoriev, Mikhail N; Bolshiyanov, Dimitry Yu; Langer, Moritz; Lange, Stephan; Bornemann, Niko; Morgenstern, Anne; Schreiber, Peter; Wille, Christian; Chadburn, Sarah; Gouttevin, Isabelle; Burke, Eleanor J; Kutzbach, Lars (2019): A 16-year record (2002–2017) of permafrost, active-layer, and meteorological conditions at the Samoylov Island Arctic permafrost research site, Lena River delta, northern Siberia: an opportunity to validate remote-sensing data and land surface, snow, and permafrost models. Earth System Science Data, 11(1), 261-299, https://doi.org/10.5194/essd-11-261-2019
    Publication Date: 2024-06-20
    Description: Most of the world's permafrost is located in the Arctic, where its frozen organic carbon con-tent makes it a potentially important influence on the global climate system. The Arctic climate appears to be changing more rapidly than the lower latitudes, but observational data density in the region is low. Permafrost thaw and carbon release into the atmosphere is a positive feed-back mechanism that has the potential for climate warming. It is therefore particularly im-portant to understand the links between the energy balance, which can vary rapidly over hour-ly to annual time scales, and permafrost condition, which changes slowly on decadal to cen-tennial timescales. This requires long-term observational data such as that available from the Samoylov research site in northern Siberia, where meteorological parameters, energy balance, and subsurface observations have been recorded since 1998. This paper presents the temporal data set produced between 2002 and 2017, explaining the instrumentation, calibration, pro-cessing and data quality control. Additional data include a high-resolution digital terrain mod-el (DTM) obtained from terrestrial LiDAR laser scanning. Since the data provide observations of temporally variable parameters that influence energy fluxes between permafrost, active lay-er soils, and the atmosphere (such as snow depth and soil moisture content), they are suitable for calibrating and quantifying the dynamics of permafrost as a component in earth system models. The data also include soil properties beneath different microtopographic features (a polygon center, a rim, a slope, and a trough), yielding much-needed information on landscape heterogeneity for use in land surface modeling. For the record from 1998 to 2017, the average mean annual air temperature was -12.3°C, with mean monthly temperature of the warmest month (July) recorded as 9.5°C and for the coldest month (February) -32.7°C. The average annual rainfall was 169mm. The depth of zero annual amplitude niveau is at 20.8m, and has warmed from -9.1°C in 2006 to -7.7°C in 2017.
    Type: Dataset
    Format: application/zip, 5 datasets
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