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metadata.artigo.dc.title: Land use influences niche size and the assimilation of resources by benthic macroinvertebrates in tropical headwater streams
metadata.artigo.dc.creator: Castro, Diego Marcel Parreira de
Carvalho, Débora Reis de
Pompeu, Paulo dos Santos
Moreira, Marcelo Zacharias
Nardoto, Gabriela Bielefeld
Callisto, Marcos
metadata.artigo.dc.subject: Macroinvertebrate assembly
Trophic ecology
Tropical streams
Trophic niches
Stable isotopes
Trophic relationships
Trophic diversity
metadata.artigo.dc.publisher: Public Library of Science (PLOS) Mar-2016
metadata.artigo.dc.identifier.citation: CASTRO, D. M. P. de et al. Land use influences niche size and the assimilation of resources by benthic macroinvertebrates in tropical headwater streams. PLoS ONE, [S.l.], v. 11, n. 3, Mar. 2016.
metadata.artigo.dc.description.abstract: It is well recognized that assemblage structure of stream macroinvertebrates changes with alterations in catchment or local land use. Our objective was to understand how the trophic ecology of benthic macroinvertebrate assemblages responds to land use changes in tropical streams. We used the isotope methodology to assess how energy flow and trophic relations among macroinvertebrates were affected in environments affected by different land uses (natural cover, pasture, sugar cane plantation). Macroinvertebrates were sampled and categorized into functional feeding groups, and available trophic resources were sampled and evaluated for the isotopic composition of 13C and 15N along streams located in the Cerrado (neotropical savanna). Streams altered by pasture or sugar cane had wider and more overlapped trophic niches, which corresponded to more generalist feeding habits. In contrast, trophic groups in streams with native vegetation had narrower trophic niches with smaller overlaps, suggesting greater specialization. Pasture sites had greater ranges of resources exploited, indicating higher trophic diversity than sites with natural cover and sugar cane plantation. We conclude that agricultural land uses appears to alter the food base and shift macroinvertebrate assemblages towards more generalist feeding behaviors and greater overlap of the trophic niches.
metadata.artigo.dc.language: en_US
Appears in Collections:DBI - Artigos publicados em periódicos

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