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Título: Structure and dynamics of stream fish communities in the flood zone of the lower Purus River, Amazonas State, Brazil
Autor(es): Fábio Ribeiro Silva
Efrem Jorge Gondim Ferreira
Cláudia Pereira de Deus
Assunto: Amazônia
ISSN: 0018-8158
Revista: Hydrobiologia (The Hague. Print)
Volume: 651
Resumo: 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.
ISSN: 0018-8158
Aparece nas coleções:Coordenação de Biodiversidade (CBIO)

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