Environmental influences on the composition and structure of the freshwater mussels in shallow lakes in the Cuiabá River floodplain

Brazilian Journal of Biology

Ac. Colle²  Ct. Callil¹ 

[1] ,Universidade Federal de Mato Grosso Instituto de Biociências Programa de Pós-graduação em Ecologia e Conservação da BiodiversidadeCuiabá MT ,Brazil

关键词: mussels;    species richness;    environmental variables;    marginal lagoons;    Pantanal;    Bivalvia;    riqueza de espécies;    variáveis ambientais;    lagoas marginais;    Pantanal;   

DOI  :  10.1590/S1519-69842012000200004

来源: SciELO

【 摘 要 】

The maintenance of the freshwater mussels' community in lakes is determined by abiotic factors at the local scale and at regional scale by interspecific relations between the larvae of bivalves and fish host. Whereas the distribution pattern at local scale, our goal was to understand the abundance and community composition of bivalves and relate the environmental agents structuring this community. We sampled 20 lakes in the floodplain of the Cuiabá River using a standardized method of sampling. To evaluate the effect of environment on the community we applied multivariate inferential analyses. We found 1.143 individuals alive belonging into six species distributed at the family Hyriidae, Mycetopodidae, Sphaeridae and Corbiculidae. The results showed that in the Pantanal the bivalve assemblage structure is influenced locally by organic matter and particle size, variables that reflect the intense interactions between water-sediment. However it is important to emphasize that these environmental characteristics are the result of the dynamics of this system which is dependent on the flood pulse, a regional factor.

【 授权许可】

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