Short-Term Meteorological Conditions Explain Cyanobacterial Blooms in a Tropical Reservoir

Cyanobacterial blooms represent a major problem in reservoirs that are used for potable water supplies. The El Limon reservoir is one of the main reserves of water for consumption in northern Argentina (22 degrees 6 ' 12.29 '' S). This study analyzed the role of abiotic factors in the promotion of blooms in El Limon 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.

Automated summary

This study analyzed the abiotic factors promoting cyanobacterial blooms in the El Limon reservoir during warm seasons and explored the physical and chemical parameters affecting the morphology of the most abundant cyanobacteria species. The results showed that short-term meteorological variations correlated with cyanobacterial abundances in this reservoir. Average daily temperatures and accumulated precipitation were found to influence the abundances and growth of cyanobacteria. Continuous and periodic monitoring is therefore necessary for tropical reservoirs.