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Physico‐chemical characteristics and seasonal changes of plankton communities in a river reservoir
Author(s) -
Toman M. J.
Publication year - 1996
Publication title -
lakes and reservoirs: research and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.296
H-Index - 39
eISSN - 1440-1770
pISSN - 1320-5331
DOI - 10.1111/j.1440-1770.1996.tb00049.x
Subject(s) - dinophyceae , plankton , phytoplankton , hypolimnion , eutrophication , zooplankton , anoxic waters , environmental science , ecology , limnology , stratification (seeds) , hydrology (agriculture) , oceanography , nutrient , biology , geology , seed dormancy , botany , germination , geotechnical engineering , dormancy
Limnological investigations of the river reservoir Mavčiče (the Sava River, Slovenia) were carried out between May and October at regular three‐week intervals. The scope of our investigation was to determine physico‐chemical parameters, species composition, abundance and changes in the plankton community during summer stratification. The dominant taxa of phytoplankton were Chlorophyceae and Dinophyceae, and less so Cyanophyceae and Bacillariophyceae, while Rotatoria and less so Ciliata, Heliozoa and Cladocera were common zooplankton taxa. Eutrophication is in progress and primarily results from the high input of municipal and industrial wastewater from the nearest town. The concentration of total phosphorus and nitrates regulates the extent of primary production in the reservoir. The result is oxygen depletion in the hypolimnetic layer and anoxic conditions in the sediments.