Habitat requirements of freshwater gastropod assemblages in a lake fringe wetland (Lake Neuchâtel, Switzerland)

Article Article scientifique Article Habitat requirements of freshwater gastropod assemblages in a lake fringe wetland (Lake Neuchâtel, Switzerland) eng 2004 author Antoine Céline 90748 author Castella Emmanuel 0000-0002-4115-4124 29171 author Castella-Mueller Jessica 107588 author Lachavanne Jean-Bernard 24745 377-394 10.1127/0003-9136/2004/0159-0377 0003-9136 Assemblages of freshwater gastropods were studied in nine pools within the largest wetland fringing a lake (Lake Neuchâtel) in Switzerland, i) to assess the relative importance of three spatial levels of differentiation (between two geographic sectors, between pools, and between habitats, i. e. helophyte vs. hydrophyte stands), and ii) to specify their habitat requirements. Relationships between species composition of gastropod assemblages and environmental variables (water and sediment characteristics) were assessed at the between-pool level. With 18 aquatic gastropod species recorded, the present study, although relatively limited in its scope (70 individual samples taken once), encompassed nearly 70% of the gastropod species available in this wetland and half of those of Switzerland. Significant differences were observed at all three spatial levels considered, in terms of species richness and individual species abundances. However, the habitat level seemed to be a major source of heterogeneity in the assemblages. Helophyte stands had denser and richer gastropod assemblages. Ordination and classification of the environmental and gastropod data revealed a good correlation between these two sets and allowed the setting up of a typology of species associations and their environmental requirements. Freshwater gastropod Pool Lake-fringe wetland Spatial level Habitat requirements Water physico-chemistry Dewey 333.7-333.9 Dewey 550 18 Institut des sciences de l'environnement 0DB 41 Département F.-A. Forel des sciences de l'environnement et de l'eau 153 false 756 Ecology and Aquatic Biology Archiv für Hydrobiologie 159 3 f2df205e-56f5-4591-b667-309568e1546f Article (Published version) Restricted Antoine2004.pdf 239857 application/pdf restrictedAccess Centres et instituts / Institut des sciences de l'environnement Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau

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Habitat requirements of freshwater gastropod assemblages in a lake fringe wetland (Lake Neuchâtel, Switzerland)	Archiv für Hydrobiologie			2004	573	0

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Castella-Mueller, Jessica