Please use this identifier to cite or link to this item:
Title: Congruence between fish and plant assemblages in drifting macrophyte rafts in Central Amazonia
Authors: Dias, Murilo Sversut
Toledo, Jos? Julio
Jardim, Manoela Meyersieck
Figueiredo, Fernando Oliveira Gouvêa de
Leandro, Carlos
Gomes, Ana Carla Serra
Zuanon, Jansen
Keywords: Abundance
Plant Community
River Basin
Species Richness
Amazon Basin
Issue Date: 2011
metadata.dc.publisher.journal: Hydrobiologia
metadata.dc.relation.ispartof: Volume 661, Número 1, Pags. 457-461
Abstract: Macrophyte rafts can enhance fish dispersal in the Amazon River basin, and determining whether raft properties (e.g., size and plant species richness) can predict fish species richness and composition is important in order to understand the underlying factors of fish dispersal. We tested for a relationship between the plant species richness and fish species richness in the rafts and determined whether there exists a significant pattern of concordance between rafts composition and fish assemblages in a River-Lake system close to Manaus, Amazonas, Brazil. We estimated the cover of each species of macrophyte and collected fish in 20 macrophyte rafts of different sizes. Macrophyte species richness was not a good predictor of fish species richness. We found a significant correlation between the compositional similarities of macrophytes and fishes when the data for presence/absence were analyzed, but not when abundance data were used. However, the congruence patterns were clearly related to raft size, and we found a correlation between plants and fishes, using both presence/absence and abundance data, when only large rafts were used in the analysis. For small rafts, there were no significant correlations using any type of data. These findings show that the composition of fish assemblage dispersal in the rafts depends on the composition of macrophytes of which the rafts are composed and on stochastic processes of raft splitting. © Springer Science+Business Media B.V. 2010.
metadata.dc.identifier.doi: 10.1007/s10750-010-0529-8
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.