Desmid algae of some water reservoirs in the upper part of the Pyshma river basin, Russia
УДК 582.262.24(470.54)
Abstract
The study of floristic composition of desmid algae (Desmidiales) has been undertaken in previously unexplored water bodies (Lake Chernobrovskoye, Mokhovoye fen, Chayach’ye fen, Shishevskoye fen, a pond on the Loginovka River), located in the upper part of the Pyshma River basin on the territory of the Middle Urals eastern macroslope. Ten species belonging to the genera Closterium (Cl. acerosum, Cl. cornu, Cl. leibleinii, Cl. moniliferum, Cl. rostratum, Cl. sublaterale), Cosmarium (C. obtusatum, C. punctulatum) and Staurastrum (S. polymorphum, S. striatum) were recorded. Based on the analysis of habitat preferences and seasonal dynamics of Desmidiales, it was assumed that eutrophication due to the runoff into water bodies from agricultural lands along river banks is a reason for the low species diversity. The oligo-mesotrophic species (Closterium cornu) recorded in Chayach’ye fen is possibly extant since a less eutrophicated stage. The discovery of 3 new species for the eastern macroslope of the Middle Urals (Closterium sublaterale, Cosmarium obtusatum, Staurastrum striatum) indicates a poor knowledge of the region from a phycofloristic point of view.
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References
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