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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A TOXIC CYANOBACTERIAL BLOOM IN AN URBAN COASTAL LAKE, RIO GRANDE DO SUL STATE, SOUTHERN BRAZIL

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Author(s):
de Carvalho, Luciana Retz [1] ; Pipole, Fernando [1] ; Werner, Vera Regina [2] ; Laughinghouse, Haywood Dail [3] ; de Camargo, Antonio Carlos M. [4] ; Rangel, Marisa [5] ; Konno, Katsuhiro [4] ; Sant'Anna, Celia Leite [1]
Total Authors: 8
Affiliation:
[1] Inst Bot, Secao Ficol, Sao Paulo - Brazil
[2] Fundacao Zoobot Rio Grande do Sul, Museu Ciencias Nat, Porto Alegre, RS - Brazil
[3] John Carroll Univ, Dept Biol, University Hts, OH - USA
[4] Inst Butantan, Ctr Toxinol Aplicada, Sao Paulo - Brazil
[5] Inst Butantan, Secao Anatomopatol, Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Brazilian Journal of Microbiology; v. 39, n. 4, p. 761-769, OCT-DEC 2008.
Web of Science Citations: 13
Abstract

Reports of cyanobacterial blooms developing worldwide have considerably increased, and, in most cases, the predominant toxins are microcystins. The present study reports a cyanobacterial bloom in Lake Violao, Torres, Rio Grande do Sul State, in January 2005. Samples collected on January 13, 2005, were submitted to taxonomical, toxicological, and chemical studies. The taxonomical analysis showed many different species of cyanobacteria, and that Microcystis protocystis and Sphaerocavum cf. brasiliense were dominant. Besides these, Microcystis panniformis, Anabaena oumiana, Cylindrospermopsis raciborskii, and Anabaenopsis elenkinii f. circularis were also present. The toxicity of the bloom was confirmed through intraperitoneal tests in mice, and chemical analyses of bloom extracts showed that the major substance was anabaenopeptin F, followed by anabaenopeptin B, microcystin-LR, and microcystin-RR. (AU)