Occurrence of toxic cyanobacterial blooms in San Roque reservoir (Córdoba - Argentina): a field and chemometric study .

AMÉ, MARÍA VALERIA; DIAZ, MARÍA DEL PILAR; WU NDERLIN, DANIEL ALBERTO

Wiley

Lugar: Adelaida, Australia; Año: 2003 vol. 18 p. 192 - 192

font color="#0000ff" size="1" face="Arial">We have evaluated the presence of cyanobacteria blooms in San Roque reservoir (Córdoba - Argentina). Cyanobacterial blooms and water samples were collected over 4 years (1998-2002). We confirmed the presence of microcystin-LR and microcystin-RR in 97% of these blooms. The total amount of microcystin (MC) ranged between 5.8-2400.0 g·g-1 of freeze-dried bloom material. These values suggest that guidelines for safe water consumption and recreational use should be established for this reservoir. Twenty-eight physical and chemical parameters were measured in water samples and evaluated by discriminant analysis (DA). A first DA was used to evaluate the factors promoting cyanobacteria occurrence, identifying 9 parameters following three different patterns associated with cyanobacterial growth. Inorganic phosphorous was found to promote the presence of blooms, whereas the highest proliferation of cyanobacteria was observed in the presence of smaller