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|Title:||Structure and dynamics of stream fish communities in the flood zone of the lower Purus River, Amazonas State, Brazil|
|Authors:||Silva, Fábio Ribeiro|
Ferreira, Efrem J.G.
Deus, C. P.
Structure And Dynamics
|metadata.dc.relation.ispartof:||Volume 651, Número 1, Pags. 279-289|
|Abstract:||The structure and dynamics of fish communities were characterized by richness, abundance, diversity and stability, during high-water and low-water periods. These analyses were performed on data from the flood zone of four streams in the lower Purus River, in the Brazilian Amazon. A total of 188 species of fish were collected, distributed among 29 families and eight orders. The statistical test showed a difference in community diversity between periods. The high-water period showed higher evenness in comparison to the low-water season. The low-water period was marked by high species abundance. A great variation in community composition between the flood and low-water periods was encountered. The adjustments for species abundance models suggested that stochastic events structure the communities. Most of the species showed a temporal variation of abundance indicating low community stability. Changes in the physico-chemical conditions of the water caused by the seasonal hydrological regime may be influencing the structuring of the fish communities. © 2010 Springer Science+Business Media B.V.|
|Appears in Collections:||Artigos|
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