The relationship between phytoplankton species dominance and environmental variables in a shallow lake (Lake Vrana,Croatia) |
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Authors: | Marija Gligora Anđelka Plenković-Moraj Koraljka Kralj István Grigorszky Danijela Peroš-Pucar |
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Affiliation: | (1) Division of Biology, Department of Botany, Faculty of Science, University of Zagreb, Rooseveltov trg 6, HR-10000 Zagreb, Croatia;(2) Botanical Department, Debrecen University, P.O. Box 14, Debrecen, 4010, Hungary;(3) Public Health Institute Zadar, Kolovare 2, Zadar, Croatia |
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Abstract: | The shallow Lake Vrana was studied over a 1-year period, special attention being paid to the phytoplankton. Phytoplankton was investigated monthly with respect to temporal variability of selected environmental factors. The regular annual development observed was in species contribution to total biomass rather than in seasonal changes in species composition. The assemblage was dominated by Cosmarium tenue Arch. and Synedra sp. In winter and in spring the phytoplankton assemblage was dominated by Cosmarium tenue and high contribution of Synedra sp. was observed during the summer and autumn. Results suggest that concentrations of inorganic nitrogen and phosphorus were critical in regulating phytoplankton biomass and species dominance. |
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Keywords: | Phytoplankton Shallow lake Species dominance |
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