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Species account for Anisus vorticulus (Troschel, 1834) (Gastropoda: Planorbidae), a species listed in annexes II and IV of the Habitats Directive

Falkner, Gerhard
Killeen, Ian J.
Published in Journal of Conchology. 2006, vol. 39, no. 2, p. 193-205
Abstract Information from more than hundred published sources, augmented by previously unpublished expert knowledge, is compiled to build up a species account for the Western Palaearctic planorbid gastropod Anisus vorticulus (Troschel, 1834), threatened at European level and recently listed in the EU Habitats Directive. The account summarizes the available data about the species, including identification, environmental requirements, life cycle, dispersal, food, geographic distribution and threats, together with recommendations for site management and survey procedures. The species occurs in both natural habitats (lake littoral, streams, river floodplains) and man-made habitats (drainage ditches, excavations). It is mostly associated with calcareous, moderately well vegetated habitats, especially with abundant floating plant coverage. The species has normally an annual life-cycle but the few available data suggest a high spatial and inter-annual variability in its phenology. To date, conservation measures for the species included vegetation removal and translocation. A dearth of quantitative and general information is obvious for almost all aspects of the biology and ecology of the species and prevents informed conservation recommendations being made.
Keywords Anisus vorticulusPlanorbidaeHabitats DirectiveEcological requirementsSite management
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Research groups Ecology and Aquatic Biology
ISE Pôle Sciences
ISE Biodiversité
Project Programme de Restauration Hydraulique et Ecologique du Rhone
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TERRIER, Aurélie et al. Species account for Anisus vorticulus (Troschel, 1834) (Gastropoda: Planorbidae), a species listed in annexes II and IV of the Habitats Directive. In: Journal of Conchology, 2006, vol. 39, n° 2, p. 193-205. https://archive-ouverte.unige.ch/unige:26775

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Deposited on : 2013-03-13

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