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  • 1
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    In:  EPIC3Polar Biology, 26(4), pp. 276-278, ISSN: 0722-4060
    Publication Date: 2024-04-23
    Description: With two exceptions, no general patterns of patchiness of the megabenthos were found on the Antarctic shelf and off northeast Greenland. Underwater videos were used as a sampling method and Morisita's Index of Dispersion for statistical analysis. A gradient from randomness to patchiness occurred for most taxa, whereas the pattern of asteroids could not be distinguished from randomness. In the Antarctic, the totals of other mobile animals were less aggregated than for sessile taxa. The findings are interpreted as a result of ecological complexity within species assemblages.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 2
    Publication Date: 2024-04-15
    Description: The accurate interpretation of ice cores as climate archives requires detailed knowledge about the glaciological environment.We investigate the potential of ground penetrating radar (GPR) surveys to obtain information about the internal structure of a cold alpine ice body to improve theinterpretation of two ice cores containing long-term climate information from Colle Gnifetti, Swiss-Italian Alps, retrieved as part of the ALPCLIM project.The GPR profiles connect several drill sites, parallel and perpendicular to the flow line, yielding a 3D picture of the subsurface.Observed internal reflection horizons are of isochronic origin, faciliating the transfer of age-depth relations between the ice cores.A third ice core record is used as independent means to estimate the accuracy of the GPR results in respect to flow modeling, based on glaciological surface data,which was used before for climate analysis of the ice cores.Our results demonstrate that GPR data is a mandatory tool for alpine ice core studies, as they allow to map major transitions in physical-chemical properties,transfer age-depth relations between sites, complement ambiguous peaks in core records for interpretation, and establish a detailed picture of the flow regimesurrounding the climate archive.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 3
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    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 29 no. 4, pp. 113-113
    Publication Date: 2024-02-08
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 4
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    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 29 no. 4, pp. 93-98
    Publication Date: 2024-02-08
    Description: The Dutch databases FLORIVON en FlorBase are nation-wide databases which contain about 10 million records of occurrence of vascular plant species, collected in the 20th century on a scale of approximately 1 square km. In this study, these data are statistically analysed to find and identify relations between changes in botanical biodiversity and changes in climate and other environmental factors. Prior to the analysis, the data have been corrected for several major forms of survey bias. The records are grouped into three intervals covering the 20th century: 1902\xe2\x80\x931949, 1975\xe2\x80\x931984, and 1985\xe2\x80\x931999. For the intervals 1902\xe2\x80\x931949 and 1975\xe2\x80\x931984, we find small but significant increases in the presence of both \xe2\x80\x98warm\xe2\x80\x99 and \xe2\x80\x98cold\xe2\x80\x99 species. However, in the final decades of the 20th century we find a marked increase in \xe2\x80\x98warm\xe2\x80\x99 species only, coinciding with the marked increase in ambient temperature observed during this period. This is evidence for a rapid response of the Dutch flora to climatic change. Urbanisation is also examined as an alternative explanation for the increase in \xe2\x80\x98warm\xe2\x80\x99 plant species. It is found to explain only 50% of the increased presence of such species in the final decades of the 20th century. Besides temperature-related effects, the most important change during the 20th century was a strong decline in plant species of nutrient poor sites and a marked increase of plant species of nutrient rich sites.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 5
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    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 29 no. 6, pp. 157-169
    Publication Date: 2024-02-08
    Repository Name: National Museum of Natural History, Netherlands
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  • 6
    Publication Date: 2024-01-12
    Description: Global warming and the change of butterfly distributions: a new opportunity for species diversity or a severe threat (Lepidoptera)? \nIn order to assess the influence of climatic changes on the distribution of insects, the ranges of nonmigratory European butterfly species have been studied. This study revealed that the northern limits of 32 (64%) of 52 species have expanded northwards during the 20th century. The southern limits of ten (25%) of 40 species have retracted northwards. The example of the Peacock butterfly (Inachis io) is given to illustrate the response to climatic changes of a species of which the range is not restricted by habitat choice. The northern limit of its range shows a considerable shift to the north during warm periods, and a southward retraction during cooler periods. Several other species showed the same pattern. These results are followed by a discussion of the impact of climate change on species diversity.
    Keywords: Lepidoptera ; Europe ; Changes in ranges ; Climate change ; Inachis io
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/conferenceObject
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  • 7
    Publication Date: 2024-01-12
    Description: Systematic sampling has proved that members of the genus Echinogammarus are known from limited areas of Morocco. In this paper, we describe a new species of Echinogammarus (Crustacea, Amphipoda): Echinogammarus oujdae n. sp. from freshwater of the northeastern region with remarks on its affinities and ecology.
    Keywords: Amphipoda ; Echinogammarus ; systematics ; freshwater ; Morocco
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 8
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    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 48 no. 2, pp. 318-318
    Publication Date: 2024-01-12
    Repository Name: National Museum of Natural History, Netherlands
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  • 9
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    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 18 no. 2, pp. 224-224
    Publication Date: 2024-01-12
    Description: This book is entirely dedicated to the functional role of fungi in all kind of ecosystems, and it attempts to show how the world would function if fungi were not there. It is conceived as an introduction to the subject for students in mycology and ecology. The introductory chapters deal with fundamental themes, and define fungi, ecosystems and their interaction. The two following chapters deal with fungi and primary production, elucidating the way fungi make available nutrients, and the roles symbiotic and parasitic relations play with regards to plant growth and carbon fixation. Chapter 4 gives an overview of secondary productivity: fungi as food for secondary producers, and fungal-faunal interactions such as ant and termite fungus gardens, bark beetle fungus interactions, and the role of fungi as faunal pathogens. Chapter 5 has population and community regulation by fungi as central theme, dealing with the role of mycorrhiza with regard to plant successions and plant fitness, saprotroph-pathogen interactions, the role of endophytes and nematophagous fungi. Chapter 6 has the interaction of fungi with humans as subject, focussing on fungi and the environment: their interaction with acidifying pollutants, heavy metals, radionucleotids, and their reaction on climatic changes. The final chapters are a synopsis and outlook to the future, in which suggestions are made for further research in the subject, using new methodology and tools. In conclusion, the book offers a lot of information on the subject, and will serve as a great source of information on fungi in ecosystems. The large number of references may facilitate further reading.
    Repository Name: National Museum of Natural History, Netherlands
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  • 10
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    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 29 no. 4, pp. 89-92
    Publication Date: 2024-01-12
    Description: In the Netherlands, Festuca ovina s. str. (= F. ovina subsp. hirtula) is a very rare taxon, which has often been overlooked. A number of new records is reported from the Veluwe area, all on military ranges, growing in pioneer grasslands (Spergulo-Corynephoretum), dense grasslands on sand (Trifolio-Festucetalia), heathlands (Genisto anglicae-Callunetum), mesophylous fringes (Melampyro-Holcetea), and Scotch Pine forests (LeucobryoPinetum empetretosum).
    Repository Name: National Museum of Natural History, Netherlands
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