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  • 1
    facet.materialart.
    Unknown
    In:  Bijdragen tot de dierkunde vol. 30 no. 1, pp. 13-31
    Publication Date: 2024-01-12
    Description: Ein Gebiet wie der Dollartraum, der aus Sand- und Schlickplaten besteht, die bei Flut \xc3\xbcbersp\xc3\xbclt werden, bei Ebbe gr\xc3\xb6\xc3\x9ftenteils blo\xc3\x9fgelegt werden und dann durch tiefe oder untiefe Wasserrinnen und Priele voneinander getrennt sind, bildet f\xc3\xbcr die Diatomeen einen au\xc3\x9fergew\xc3\xb6hnlichen Lebenskreis. Wechselweise von Salzwasser \xc3\xbcberschwemmt oder austrocknend in einer prallen Sonne, manchmal auch mit salzarmen Regenwasser duchtr\xc3\xa4nkt und gro\xc3\x9fen Temperaturschwankungen ausgesetzt, ist es nur bestimmten, zu spezifischen Assoziationen vereinigten Arten m\xc3\xb6glich, sich in einer derartigen Umgebung zu behaupten. Auf diesen Umstand haben schon BROCKMANN (1935) und HUSTEDT (1939) hingewiesen.\nEs zeigt sich, da\xc3\x9f in gleichwertigen Biotopen diese eurytopen, euryhalinen und eurythermen Assoziationen nicht nur in Holland, sondern u.a. auch in Deutschland, England und Schottland vorkommen. Innerhalb des Biotops entstehen kleinere, jedoch gleichfalls spezifische Artengruppierungen von Diatomeen, auf wenig n\xc3\xa4hrstoffreichem Sandboden aber manchmal andere als auf einem Schlickboden, der viel organische Stoffe enth\xc3\xa4lt.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 2
    facet.materialart.
    Unknown
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 7 no. 3, pp. 599-601
    Publication Date: 2024-01-12
    Description: In 1934 Dr van Steenis recorded Elisma natans (L.) Buch. for the first time outside Europe, viz. from Java. This unusual record was based on a single specimen collected in 1932 by Dr A. Kleinhoonte in Central Java at 2000 m altitude on Mt Di\xc3\xabng, now preserved in the Herbarium Bogoriense. Miss Kleinhoonte assumed there was little doubt that she had collected it in Java. After having collected information from the Fisheries Department in Java, that no Elisma was ever planted by that Service, Dr van Steenis stated (1, p. 175): \xe2\x80\x9cThough it is a waterplant, I cannot account for this enormous discontinuity.\xe2\x80\x9d A year later (2, p. 55) he gave a figure of the specimen and concluded that he felt forced to accept the species as a native of Java.\nHowever, he nursed a feeling that there was something wrong in this forced assumption. The pools on Mt Di\xc3\xabng are easy to reach and have been subjected to repeated botanical field work by experienced botanists onwards of Junghuhn. His doubt was later still strengthened by the fact that shortly before the war, the late Mr J. G. T. Loogen, a planter and enthusiastic amateur-botanist living N. of Mt Di\xc3\xabng, repeatedly searched the spot where Elisma was said to be found but without success.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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