The species diversity of freshwater snails (Gastropoda) in differently managed fish ponds in south-western Poland
2007
Spyra, A., University of Silesia, Katowice (Poland). Department of Hydrobiology | Serafiński, W., University of Silesia, Katowice (Poland). Department of Hydrobiology | Strzelec, M., University of Silesia, Katowice (Poland). Department of Hydrobiology
The present study, based on data from one protected and one normally exploited complex of fishponds, illustrates the impact offish farming on the diversity of snail communities in farm ponds. The periodical drying up and moving of plants and mud are the causes of the decrease in gastropod species number in exploited ponds in comparison to protected ones (5-7 vs. 12-16 species, respectively). Similarly the plant diversity is much lesser in unprotected ponds. Other environmental factors affect the snail communities to a lesser degree. Significant negative correlations exist between snail species number and total hardness and magnesium ion concentration in the water, as well as a positive correlation between snail species diversity and the number of plant species.
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Эту запись предоставил Technical University in Zvolen