Show simple item record Rosa, Carlos Eduardo da Souza, Márcio Silva de Yunes, João Sarkis Proença, Luis Antonio de Oliveira Nery, Luiz Eduardo Maia Monserrat, José María 2011-11-02T22:59:40Z 2011-11-02T22:59:40Z 2005
dc.identifier.citation ROSA, Carlos Eduardo da et. al. Cyanobacterial blooms in estuarine ecosystems: characteristics and effects on Laeonereis acuta (Polychaeta, Nereididae). Marine Pollution Bulletin, v. 50, p. 956-964, 2005. Disponível em: <>. Acesso em: 21ago. 2011. pt_BR
dc.identifier.issn 0025-326X
dc.description.abstract In January of 2003, a cyanobacterial bloom in the Patos Lagoon (Southern Brazil) (32 050S–52 120W) was observed. Water samples were taken to identify the composition and abundance of the bloom, as well as the occurrence of toxins. The effects of this occurrence on the estuarine worm Laeonereis acuta (Polychaeta, Nereididae) was also evaluated. Predominance of cyanobacteria, particularly Anabaena trichomes ( 2.5.106 individuals per liter) was observed, and low concentrations of microcystins and anticholinesterasic toxins were detected. Augmented levels of lipid hydroperoxides (LPO) and glutathione-S-transferase activity, and lowering of total protein content were also observed in organisms collected during the bloom event. Although non-toxic, the cyanobacterial bloom could augment the cycle of hyper-oxygenation and hypoxia in the water. During hyperoxia, L. acuta, an oxyconformer, should consume more oxygen, thus augmenting the rate of reactive oxygen species generation. A repeated cycle of hyperoxygenation and hypoxia would finally induce oxidative stress, as evidenced by the high levels of LPO and glutathione-S-transferase activity. pt_BR
dc.language.iso eng pt_BR
dc.rights restrict access pt_BR
dc.subject Cyanotoxins pt_BR
dc.subject Patos' Lagoon pt_BR
dc.subject Laeonereis acuta pt_BR
dc.subject Oxidative stress pt_BR
dc.subject Antioxidant enzymes pt_BR
dc.subject Cholinesterase pt_BR
dc.title Cyanobacterial blooms in estuarine ecosystems: characteristics and effects on Laeonereis acuta (Polychaeta, Nereididae) pt_BR
dc.type article pt_BR

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