2015
DOI: 10.1590/1982-0224-20140157
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Fish complementarity is associated to forests in Amazonian streams

Abstract: The functional structure of communities is commonly measured by the variability in functional traits, which may demonstrate complementarity or redundancy patterns. In this study, we tested the influence of environmental variables on the functional structure of fish assemblages in Amazonian streams within a deforestation gradient. We calculated six ecomorphological traits related to habitat use from each fish species, and used them to calculate the net relatedness index (NRI) and the nearest taxon index (NTI). … Show more

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Cited by 25 publications
(26 citation statements)
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“…Each FG that exhibited a significant threshold response had only 1 or 2 ecomorphologically unique species, which likely contributed to the ability to distinguish a consistent response. This suggests that streams in forested watersheds harbor species with complementary ensembles of ecomorphological traits, and we detected strong negative threshold responses of functional groups associated with habitat structures derived from the terrestrial environment and that are commonly found in streams draining densely forested watersheds (Supporting Information; Bordignon et al 2015). This result corresponds with our predictions based on a large body of research on effects of land-cover change on stream fish assemblages and recent findings of Leitão et al (2017) from 2 different regions of the Amazon.…”
Section: Discussionsupporting
confidence: 90%
“…Each FG that exhibited a significant threshold response had only 1 or 2 ecomorphologically unique species, which likely contributed to the ability to distinguish a consistent response. This suggests that streams in forested watersheds harbor species with complementary ensembles of ecomorphological traits, and we detected strong negative threshold responses of functional groups associated with habitat structures derived from the terrestrial environment and that are commonly found in streams draining densely forested watersheds (Supporting Information; Bordignon et al 2015). This result corresponds with our predictions based on a large body of research on effects of land-cover change on stream fish assemblages and recent findings of Leitão et al (2017) from 2 different regions of the Amazon.…”
Section: Discussionsupporting
confidence: 90%
“…The fish assemblage composition in streams of Eastern Amazon followed the known pattern for Neotropical streams, as well as for Amazon streams, showing a higher Characiformes richness, followed by Siluriformes (Dias et al ., ; Barros et al ., ; Bordignon et al ., ; Datry et al ., ). The higher abundance of Ituglanis amazonicus and Pimelodella sp.…”
Section: Discussionmentioning
confidence: 99%
“…Studies of functional groups in fish communities have shown highly congruent patterns of habitat use, assemblage structure and functional redundancy at global biogeographic (Bellwood et al, 2002), regional (Aguilar-Medrano & Calderon-Aguilera, 2015), and local scales (Hoeinghaus et al, 2007;Teresa & Casatti, 2012;Bordignon et al, 2015). A useful tool to understand the ecological function of fish consists in the analysis of functional traits by means of an ecomorphological approach (Mason et al, 2007;Mouillot et al, 2006;Villéger et al, 2010;Mouchet et al, 2013).…”
Section: Introductionmentioning
confidence: 99%