Freshwater bryozooans in the backwaters of the Danube and Traun Rivers south-east of linz, upper Austria

Emmy Wöss, Manfred Walzl

    Publications: Contribution to journalArticlePeer Reviewed

    Abstract

    A faunistic census of freshwater bryozoans has been carried out in backwaters along a 5 km stretch of the Danube River south-east of Linz. The investigation area is situated within the impoundment area of the hydroelectric power station Abwinden-Asten. Nine backwaters in these floodplains on both sides of the Danube River were chosen. These backwaters, which are partly also under the influence of the ydrological regime of the Traun River, are mostly shallow and show little fluctuation in water level during the year. A total of six bryozoan species was found at four sites: Paludicella articulata, Fredericella sultana, Cristatella mucedo, Plumatella casmiana, Plumatella fungosa and Plumatella repens. Notably missing from these sites were P. emarginata, P. fruticosa and Hyalinella punctata, three species that occur downstream in Danube River backwaters in Lower Austria. However, the occurrence of Plumatella casmiana in the backwater "Ringelau" south-east of Linz is the first record of this species in a floodplain area of the Danube River in Austria. It also increases the number of freshwater bryozoan species for Upper Austria to eight.
    Original languageEnglish
    Pages (from-to)77-91
    Number of pages15
    JournalLinzer biologische Beiträge
    Volume38
    Issue number1
    Publication statusPublished - 2006

    Austrian Fields of Science 2012

    • 106047 Animal ecology

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