Abstract
Cyanobacterial blooms represent a major problem in reservoirs that are used for potable water supplies. The El Limón reservoir is one of the main reserves of water for consumption in northern Argentina (22°6′12.29″ S). This study analyzed the role of abiotic factors in the promotion of blooms in El Limón during warm seasons and explored the physical and chemical parameters affecting the morphological development of the most abundant cyanobacteria species. The results showed that short-term meteorological variations correlated with cyanobacterial abundances in this shallow reservoir. Average daily temperatures for 6 and 8 months before the sampling date were positively correlated with cyanobacterial abundances as well as filament length, while accumulated precipitation limited the abundances of cyanobacteria. Considering the highly probably effects of short-term meteorological factors on cyanobacterial blooms, the results support the need for continuous and periodic monitoring of tropical reservoirs.
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