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  • Artikel  (21.734)
  • 2020-2024  (21.734)
  • 1945-1949
  • 2021  (21.734)
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  • 1
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    Uptake and absorption of fluoranthene from spiked microplastics into the digestive gland tissues of blue mussels, Mytilus edulis L. (2021)
    Elsevier
    In:  EPIC3Chemosphere, Elsevier, 279, pp. 130480-130480, ISSN: 0045-6535
    Details
    Publikationsdatum: 2024-07-05
    Beschreibung: The present work intended to investigate the fate of contaminant-loaded microplastics if ingested by benthic filter feeder Mytilus edulis under laboratory conditions. In the course of a 7-day experiment the mussels were exposed to PVC microplastics in a size range 〉40 mm, in doses of 2000 particles L_1 (11.56 mg L_1). Particles were either virgin or loaded with one of four different nominal concentrations of the polycyclic aromatic hydrocarbon (PAH) fluoranthene (500, 125, 31.25 and 7.8125 mg g_1). Verification of fluoranthene concentrations on the particles provided evidence of the high absorptive capacity of PVC for this PAH, indicating that comparable particles may serve as considerable accumulation sites for high concentrations of hydrophobic contaminants in the aquatic environment. Analysis of digestive gland tissues via polarised light microscopy revealed the occurrence of particles and particle aggregates within stomach and intestines of all mussels treated with microplastics, thus making the xenobiotic bioavailable. Results of contaminant analysis in mussel tissues via equilibrium sampling point to a considerable capability of microplastics for the accumulation of hydrophobic contaminants from the environment and their potential to act as vehicles for the transport of theses contaminants into organismal tissues. of fluoranthene concentrations on the particles provided evidence of the high absorptive capacity of PVC for this PAH, indicating that comparable particles may serve as considerable accumulation sites for high concentrations of hydrophobic contaminants in the aquatic environment. Analysis of digestive gland tissues via polarised light microscopy revealed the occurrence of particles and particle aggregates within stomach and intestines of all mussels treated with microplastics, thus making the xenobiotic bioavailable. Results of contaminant analysis in mussel tissues via equilibrium sampling point to a considerable capability of microplastics for the accumulation of hydrophobic contaminants from the environment and their potential to act as vehicles for the transport of theses contaminants into organismal tissues. © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , peerRev
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  • 2
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    Diversity and flexibility of algal symbiont community in globally distributed larger benthic foraminifera of the genus Amphistegina (2021)
    In:  BMC Microbiology
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    Publikationsdatum: 2024-07-05
    Materialart: info:eu-repo/semantics/article
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  • 3
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    Inter‐Laboratory Characterisation of Apatite Reference Materials for Chlorine Isotope Analysis (2021)
    In:  Geostandards and Geoanalytical Research
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    Publikationsdatum: 2024-07-05
    Beschreibung: Here we report on a set of six apatite reference materials (chlorapatites MGMH# 133648, TUBAF# 38 and fluorapatites MGMH# 128441A, TUBAF# 37, 40, 50) which we have characterised for their chlorine isotope ratios; these RMs span a range of Cl mass fractions within the apatite Ca10(PO4)6(F,Cl,OH)2 solid solution series. Numerous apatite specimens, obtained from mineralogical collections, were initially screened for 37Cl/35Cl homogeneity using SIMS followed by δ37Cl characterisation by gas source mass spectrometry using both dual‐inlet and continuous‐flow modes. We also report major and key trace element compositions as determined by EPMA. The repeatability of our SIMS results was better than ± 0.10‰ (1s) for the five samples with 〉 0.5% m/m Cl, and ± 0.19‰ (1s) for the low Cl abundance material (0.27% m/m). We also observed a small, but significant crystal orientation effect of 0.38‰ between the mean 37Cl/35Cl ratios measured on three oriented apatite fragments. Furthermore, the results of GS‐IRMS analyses show small but systematic offset of δ37ClSMOC values between the three laboratories. Nonetheless, all studied samples have comparable chlorine isotope compositions, with mean 103δ37ClSMOC values between +0.09 and +0.42 and in all cases with 1s ≤ ± 0.25.
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  • 4
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    Asplenium alleniae (Aspleniaceae), a new fern species from Borneo and New Guinea (2021)
    Naturalis Biodiversity Center
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 65 no. 3, pp. 219-223
    Details
    Publikationsdatum: 2024-07-03
    Beschreibung: A new species, Asplenium alleniae, is described from high elevation habitats in Sabah (Malaysia) and Papua New Guinea. Previous phylogenetic analyses of chloroplast loci determined that A. alleniae was most closely related to A. pauperequitum from New Zealand. Asplenium alleniae differs from A. pauperequitum most obviously by the acuminate apices of its longer pinnae. The combination of pinnate fronds with few pairs of primary pinnae and dark red-brown axes distinguishes A. alleniae from superficially similar species of Asplenium in Malesia. Asplenium alleniae is provisionally assessed as Endangered.
    Schlagwort(e): Plant Science ; Ecology ; Evolution ; Behavior and Systematics ; conservation ; Malaysia ; Malesia ; Mount Kinabalu ; Papua New Guinea ; Sabah ; taxonomy
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
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  • 5
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    Four new Curcuma species (Zingiberaceae) from Thailand (2021)
    Naturalis Biodiversity Center
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 65 no. 3, pp. 244-253
    Details
    Publikationsdatum: 2024-06-28
    Beschreibung: Four new Curcuma species (Zingiberaceae) from Thailand are described here. Curcuma fimbriata, C. micrantha and C. spathulata belong to C. subg. Hitcheniopsis, while C. globulifera belongs to the nominal C. subg. Curcuma. Each species is compared to the morphologically closest species and detailed descriptions, colour plates and information on their distribution, ecology, phenology and uses are provided. A preliminary IUCN conservation assessment of each of these species is proposed.
    Schlagwort(e): Plant Science ; Ecology ; Evolution ; Behavior and Systematics ; Curcuma globulifera ; Curcuma fimbriata ; Curcuma micrantha ; Curcuma parviflora ; Curcuma spathulata ; Curcuma subg. Hitcheniopsis
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
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  • 6
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    Two new species of Hanguana (Hanguanaceae) from Kalimantan, Indonesia (2021)
    Naturalis Biodiversity Center
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 66 no. 1, pp. 101-105
    Details
    Publikationsdatum: 2024-06-26
    Beschreibung: Two new Hanguana species from Kalimantan, Indonesian Borneo, are described here. Hanguana karimatae from Karimata Island, West Kalimantan province, is characterised by a stout habit, prominently oblique yellow fruits with raised stigma and 1- or 2-seeded fruits. Hanguana nana from Central Kalimantan province is the smallest species in the genus with the stem entirely covered by leaves, deflexed barely branched infructescences with only a few fruits, each with a single bowl-shaped seed with a large and incurved appendage. These are the first descriptions of new Hanguana species from Kalimantan (Indonesian Borneo). Colour plates as well as notes on distribution, ecology, habitat and conservation status are provided.
    Schlagwort(e): Plant Science ; Ecology ; Evolution ; Behavior and Systematics ; Borneo ; Hanguana karimatae ; Hanguana nana ; Kalimantan ; Karimata Island ; taxonomy
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
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  • 7
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    New combinations and names for some Philippine vascular plants (2021)
    Naturalis Biodiversity Center
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 66 no. 1, pp. 96-100
    Details
    Publikationsdatum: 2024-06-22
    Beschreibung: New names and new combinations are presented for 29 Philippine species in the families Acanthaceae, Aspleniaceae, Cucurbitaceae, Gesneriaceae, Lauraceae, Myrtaceae, Oleaceae, Thelypteridaceae, Urticaceae, and Vitaceae. Seventeen names are lectotypified.
    Schlagwort(e): Plant Science ; Ecology ; Evolution ; Behavior and Systematics ; lectotypification ; nomenclature ; Philippines ; taxonomy
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
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  • 8
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    Relative pollen productivity estimates of savanna taxa from southern Africa and their application to reconstruct shrub encroachment during the last century (2021)
    In:  EPIC3The Holocene, 31(7), pp. 1100-1111, ISSN: 0959-6836
    Details
    Publikationsdatum: 2024-06-22
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
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  • 9
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    The Environment at Lake El’gygytgyn Area (Northeastern Russian Arctic) Prior to and After the Meteorite Impact at 3.58 Ma (2021)
    In:  EPIC3Frontiers in Earth Science, 9, ISSN: 2296-6463
    Details
    Publikationsdatum: 2024-06-22
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev , info:eu-repo/semantics/article
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  • 10
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    Recent above-ground biomass changes in central Chukotka (Russian Far East) using field sampling and Landsat satellite data (2021)
    In:  EPIC3Biogeosciences, 18(11), pp. 3343-3366, ISSN: 1726-4189
    Details
    Publikationsdatum: 2024-06-22
    Beschreibung: Upscaling plant biomass distribution and dynamics is essential for estimating carbon stocks and carbon balance. In this respect, the Russian Far East is among the least investigated sub-Arctic regions despite its known vegetation sensitivity to ongoing warming. We representatively harvested above-ground biomass (AGB; separated by dominant taxa) at 40 sampling plots in central Chukotka. We used ordination to relate field-based taxa projective cover and Landsat-derived vegetation indices. A general additive model was used to link the ordination scores to AGB. We then mapped AGB for paired Landsat-derived time slices (i.e. 2000/2001/2002 and 2016/2017), in four study regions covering a wide vegetation gradient from closed-canopy larch forests to barren alpine tundra. We provide AGB estimates and changes in AGB that were previously lacking for central Chukotka at a high spatial resolution and a detailed description of taxonomical contributions. Generally, AGB in the study region ranges from 0 to 16 kg m−2, with Cajander larch providing the highest contribution. Comparison of changes in AGB within the investigated period shows that the greatest changes (up to 1.25 kg m−2 yr−1) occurred in the northern taiga and in areas where land cover changed to larch closed-canopy forest. As well as the notable changes, increases in AGB also occur within the land-cover classes. Our estimations indicate a general increase in total AGB throughout the investigated tundra–taiga and northern taiga, whereas the tundra showed no evidence of change in AGB.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev , info:eu-repo/semantics/article
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