Occurrence of Toxic Cyanobacterial Blooms in Rio de la Plata Estuary, Argentina: Field Study and Data Analysis. (22nd February 2012)

• Record Type: Journal Article
• Authors: Giannuzzi, L.; Carvajal, G.; Corradini, M. G.; Araujo Andrade, C.; Echenique, R.; Andrinolo, D.
• Other Names: DeCaprio Anthony Academic Editor.
• Is Part Of: Journal of toxicology. Volume 2012(2012)
• Publication Date: 2012-02-22
• Subjects: Toxicology -- Periodicals; 571.9505
• DOI: 10.1155/2012/373618
• Languages: English
• ISSNs: 1687-8191

Abstract

Abstract : Water samples were collected during 3 years (2004–2007) at three sampling sites in the Rio de la Plata estuary. Thirteen biological, physical, and chemical parameters were determined on the water samples. The presence of microcystin-LR in the reservoir samples, and also in domestic water samples, was confirmed and quantified. Microcystin-LR concentration ranged between 0.02 and 8.6 μ g.L −1 . Principal components analysis was used to identify the factors promoting cyanobacteria growth. The proliferation of cyanobacteria was accompanied by the presence of high total and fecal coliforms bacteria (>1500 MNP/100 mL), temperature ≥25 ∘ C, and total phosphorus content ≥1.24 mg·L −1 . The observed fluctuating patterns of Microcystis aeruginosa, total coliforms, and Microcystin-LR were also described by probabilistic models based on the log-normal and extreme value distributions. The sampling sites were compared in terms of the distribution parameters and the probability of observing high concentrations for Microcystis aeruginosa, total coliforms, and microcystin-LR concentration.