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Freshwater mollusks and environmental assessment of Guandu River, Rio de Janeiro, Brazil

2017; Fundação de Amparo à Pesquisa do Estado de SP; Volume: 17; Issue: 3 Linguagem: Inglês

10.1590/1676-0611-bn-2017-0342

1678-7927

Igor Christo Miyahira, Jéssica Beck Carneiro, Isabela Cristina Brito Gonçalves, Luiz Eduardo Macedo de Lacerda, Jaqueline Lopes de Oliveira, Mariana Castro de Vasconcelos, Sônia Barbosa dos Santos,

Environmental Toxicology and Ecotoxicology

Abstract The Guandu River Basin is extremely important to state of Rio de Janeiro, as a water supplier of several municipalities. However, the malacological knowledge and environmental status is not well known to this basin. The aim of this paper is to present an inventory of freshwater mollusks, as well as an environmental assessment through a Rapid Assessment Protocol, of ten sampling sites at Guandu River basin in six municipalities (Piraí, Paracambi, Japeri, Seropédica, Queimados and Nova Iguaçu). Thirteen species of molusks were found, eight native (Pomacea maculata, Biomphalaria tenagophila, Gundlachia ticaga, Gundlachia radiata, Omalonyx matheroni, Diplodon ellipticus, Anodontites trapesialis and Eupera bahiensis) and five exotics (Melanoides tuberculata, Ferrissia fragilis, Physa acuta, Corbicula fluminea and Corbicula largillierti). The environmental analysis ranked most sites as “modified”. The expansion of exotic species with their associated negative effects, as well the gap in knowledge of native species calls attention to the need of future studies of biology and ecology of the species found.