Long Therm Changes of Species Composition and Abundance of Pulmonata Snails (Gastropoda) in the Lake Chany (South of West Siberia)
N. I. YURLOVA, S. N. VODYANITSKAYA
Abstract
The species composition and population density of pulmonata snails were studied in 1980-2002 in the lake Chany in the south of West Siberia. From May to September, three times in each month, samples of relative density of snails, water level and temperature were taken at 3 stations . Twenty three pulmonate snail species - Lymnaea stagnalis, L. fragilis, L. kazakensis, L. truncatula, L. palustris, L. saridalensis, L. berlani, L.sp., L. auricularia, L. ovata, L. peregra, L. tumida, L. lagotis, Planorbis planorbis, Anisus spirorbis, A. vortex, A.contortus, Armiger crista, A. bielzi, Segmentina nitida, Physa fontinalis, Aplexa hypnorum, Planorbarius corneus - were recorded during the study period. Four species - L. stagnalis, L. tumida, L. palustris and Pl.planorbis - formed the core of the community. The
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