Journal
HYDROBIOLOGIA
Volume 654, Issue 1, Pages 205-214Publisher
SPRINGER
DOI: 10.1007/s10750-010-0382-9
Keywords
Dinoflagellates; Freshwater; Seasonality; Ecology; Temperate climate
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Knowledge of dinoflagellate diversity in Brazilian reservoirs is limited, especially in subtropical environments. We investigated as to how nutrients and other environmental variables influenced the biomass of Dinophyceae species in three subtropical ecosystems. The reservoirs Samuara, Faxinal, and So Miguel were sampled fortnightly from 2002 to 2006, and eight dinoflagellate taxa were identified. High temperature was a determining factor for the occurrence of Peridinium africanum Lemmermann. Peridinium umbonatum Stein and P. willei Huitfeld-Kass required high concentrations of nutrients. P. willei was inversely related to temperature and directly related to nutrients. P. umbonatum Stein var. umbonatum Stein showed the largest range of tolerance toward resources. Durinskia baltica Carty & Cox and Peridinium gatunense Nygaard could be opportunistic, since they did not show any spatial or temporal pattern.
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