Variação temporal da comunidade fitoplanctônica em lagos urbanos eutróficos
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Data
2011
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Resumo
The aim of this study was to investigate the seasonal changes and temporal
synchrony of phytoplankton community attributes (diversity and density) at four eutrophic
urban reservoirs (Jardim Botânico lake, Vaca Brava Park lake, Rosas lake and Bosque dos Buritis
lake) in the city of Goiânia, Goiás State. Phytoplankton diversity was estimated by the Shannon-
Winner (H’) index and phytoplankton density by the Utermöhl method. All lakes presented high
phytoplankton diversity, ranging from H’ = 0.97 (Bosque dos Buritis) to H’ =4.29 (Jardim
Botânico). The phytoplankton diversity of the four lakes was significantly different (F = 4.74;
p < 0,001. n=4), and phytoplankton density was high, with bloom of Cyanophyceae (Bosque
dos Buritis) and Chrysophyceae (Jardim Botânico). The four lakes presented low or absent
synchronic phytoplankton communities (density and diversity attributes); moreover, Canonical
Correspondence Analysis (CCA) also showed that the lakes presented different phytoplankton
community structures, especially Jardim Botanico, which evidenced most different
phytoplankton community structure. Furthermore, the other lakes presented different
phytoplankton communities over at least one sampling period. These results demonstrated the
importance of local factors in the structure of the phytoplankton community, such as limnologic
and geomorphologic characteristics.
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Palavras-chave
Densidade, Diversidade, Sincronismo, Lagos artificiais, Fatores locais, Sazonalidade, Density, Diversity, Synchronism, Artificial lakes, Local factors, Seasonality
Citação
NOABOUT, João Carlos; NOGUEIRA, Ina de Souza. Variação temporal da comunidade fitoplanctônica em lagos urbanos. Acta Scientiarum. Biological Sciences, Maringá, v. 33, n. 4, p. 383-391, 2011.