Data/hora: 08/06/2024 15:55:07

Provedor de dados: | 42
País: | Brazil
Título: | Can nearby eutrophic reservoirs sustain a differentiated biodiversity of planktonic microcrustaceans in a tropical semiarid basin?
Autores: | DINIZ,LEIDIANE P.; MELO-JÚNIOR,MAURO DE.
Data: | 2017-12-01
Ano: | 2017
Palavras-chave: | Alpha and beta diversities; Artificial lakes; Cladocera; Copepoda; Brazil; Zooplankton.
Resumo: | ABSTRACT This paper aims to compare alpha and beta diversities of planktonic microcrustaceans from three reservoirs located nearby in a tropical semiarid basin. Our hypothesis was that alpha and beta diversities of the community are different, although the ecosystems are located close to each other. We carried out two sampling campaigns: dry and rainy seasons. The sampling of microcrustaceans and environmental variables (dissolved oxygen, chlorophyll a and nutrient) was performed at twelve stations and were distributed throughout the three zones (river, transition, and lacustrine), using a plankton net (45 µm). The reservoirs showed different uses and types of nitrogen predominance: Cachoeira (supply/nitrate), Borborema (sewage/ammonia) and Saco (aquaculture/ammonia). Seventeen species were recorded whose richness was assessed as particularly specific to each one of the studied reservoirs. Seasonally, both reservoirs with high anthropogenic alteration showed greater richness in the dry season. The three reservoirs located in a same basin showed different richness and composition, but the diversity did not differ between the zones of the reservoirs. Although communities are close to each other, their composition and richness were found to be distinct for each reservoir. This may be in response to the peculiar particularities, such as nitrogen sources and the different uses.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602771
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201720170481
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.89 n.4 2017
Fonte: | info:eu-repo/semantics/openAccess