| Revue: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000436043 |
| ISSN: | 0001-3765 |
| Autores: | Paschoal, Lucas R.P1 Andrade, Douglas P2 Pimpao, Daniel M3 Torres, Santiago4 Darrigran, Gustavo5 |
| Instituciones: | 1Faculdade de Tecnologia Nilo de Stefani, Jaboticabal, Sao Paulo. Brasil 2Universidade Federal de Sao Carlos, Sao Carlos, Sao Paulo. Brasil 3Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renovaveis, Superintendencia Regional, Florianopolis, Santa Catarina. Brasil 4Centro de Investigaciones y Transferencia Santa Cruz, Unidad Académica San Julián, Puerto San Julián, Santa Cruz. Argentina 5Universidad Nacional de La Plata, Facultad de Ciencias Naturales y Museo, La Plata, Buenos Aires. Argentina |
| Año: | 2020 |
| Volumen: | 92 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | In 2012, a severe drought struck the southeastern of Brazil compromising the Paraná River Basin reservoirs. Here, we described how this climatic event promoted a massive mortality of the giant freshwater mussel Anodontites trapesialis in Furnas reservoir and reported the consequences of this phenomenon. In November 2012, three quarters of 100 m2 were sampled in this reservoir, where 812 dead shells of A. trapesialis were analyzed and measured (33 ˫ 133 mm). The species showed an aggregated distribution with high density ( X ¯: 1.0 - 5.5 ind/m2). Despite the massive mortality detected in field, it was possible to find living specimens in a small channel in the studied area, allowing the species to survive the water level fluctuations. Large adult individuals (100 ˫ 124 mm) were more affected by drought than juveniles, accounting for about 90% of the dead mussels analyzed. Two years after the massive mortality event, water level was not reestablished and a terrestrial succession (with elevations in the concentration of organic matter and calcium in sediment) was observed in the studied area. We verified that the damming associated with extreme climatic events affect negatively the populations of A. trapesialis and should be faced as a conservationist problem |
| Disciplinas: | Biología |
| Palabras clave: | Moluscos, Ecología, Moluscos dulceacuícolas, Estrés hídrico, Sequía, Mortalidad masiva, Anodontites trapesialis, Bivalvia |
| Keyword: | Molluscs, Ecology, Freshwater molluscs, Water stress, Drought, Mass mortality, Anodontites trapesialis, Bivalvia |
| Texte intégral: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
