Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/11886
Tipo do documento: Artigo
Título: Metacommunity structuring in stream networks: roles of dispersal mode, distance type, and regional environmental context
Autor: Groonroos, Mira
Heino, Jani
Siqueira, Tadeu
Landeiro, Victor Lemes
Kotanen, Juho
Bini, Luis Mauricio
Abstract: Within a metacommunity, both environmental and spatial processes regulate variation in local community structure. The strength of these processes may vary depending on species traits (e.g., dispersal mode) or the characteristics of the regions studied (e.g., spatial extent, environmental heterogeneity). We studied the metacommunity structuring of three groups of stream macroinvertebrates differing in their overland dispersal mode (passive dispersers with aquatic adults; passive dispersers with terrestrial adults; active dispersers with terrestrial adults).We predicted that environmental structuring should be more important for active dispersers, because of their better ability to track environmental variability, and that spatial structuring should be more important for species with aquatic adults, because of stronger dispersal limitation. We sampled a total of 70 stream riffle sites in three drainage basins. Environmental heterogeneity was unrelated to spatialextent among our study regions, allowing us to examine the effects of these two factors on metacommunity structuring. We used partial redundancy analysis and Moran’s eigenvector maps based on overland and watercourse distances to study the relative importance of environmental control and spatial structuring. We found that, compared with environmental control, spatial structuring was generally negligible, and it did not vary according to our predictions. In general, active dispersers with terrestrial adults showed stronger environmental control than the two passively dispersing groups, suggesting that the species dispersing actively are better able to track environmental variability. There were no clear differences in the results based on watercourse and overland distances. The variability in metacommunity structuring among basins was not related to the differences in the environmental heterogeneity and spatial extent. Our study emphasized that (1) environmental control is prevailing in stream metacommunities, (2) dispersal mode may have an important effect on metacommunity structuring, and (3) some factors other than spatial extent or environmental heterogeneity contributed to the differences among the basins.
Palavras-chave: Metacommunity structuring
Spatial processes
País: Estados unidos
Instituição: Wiley-Blackwell
Unidade acadêmica: Instituto de Ciências Biológicas - ICB (RG)
Citação: GRÖNROOS, Mira; HEINO, Jani; SIQUEIRA, Tadeu; LANDEIRO, Victor L.; KOTANEN, Juho; BINI, Luis M. Metacommunity structuring in stream networks: roles of dispersal mode, distance type, and regional environmental context. Ecology and Evolution, Hoboken, v. 3, n. 13, p. 4473-4487, Nov. 2013.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1002/ece3.834
Identificador do documento: 10.1002/ece3.834
URI: http://repositorio.bc.ufg.br/handle/ri/11886
Data de publicação: Nov-2013
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