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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.
Keywords: Brazilian Amazon
Community Composition
Community Diversity
Community Stability
Fish Communities
Fish Species
Flood Zones
Hydrological Regime
Species Abundance
Stochastic Events
Stream Fish
Structure And Dynamics
Temporal Variation
Statistical Tests
Stochastic Models
Community Structure
Freshwater Ecosystem
Hydrological Regime
Physicochemical Property
Species Diversity
Species Richness
Temporal Variation
Water Level
Purus River
South America
Issue Date: 2010
metadata.dc.publisher.journal: Hydrobiologia
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.
metadata.dc.identifier.doi: 10.1007/s10750-010-0307-7
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