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Tipo do documento: Artigo
Título: Is the diet of a typical shredder related to the physical habitat of headwater streams in the Brazilian cerrado?
Autor: Ferreira, Wander Ribeiro
Santos, Raphael Ligeiro Barroso
Macedo, Diego Rodrigues
Hughes, Robert M.
Kaufmann, Philip R.
Oliveira, Leandro Gonçalves
Pereira, Marcos Callisto de Faria
Resumo: Macroinvertebrates are important for processing leaf detritus in temperate streams, but studies about their role in tropical streams often present conflicting results. Via digestive tract analyses, we assessed the diets of Phylloicus sp. larvae (Trichoptera: Calamoceratidae), collected from streams of two southeastern Brazil river basins (Araguari, Sa˜o Francisco). We classified gut contents as coarse particulate organic matter (CPOM), fine particulate organic matter (FPOM), algae, animal tissue, vascular plant tissue and mineral material. We hypothesized that the diets of Phylloicus larvae would be related to the physical habitat of the streams (e.g., riparian vegetation, organic matter availability and morphological characteristics), larval size and river basin. Although FPOM content predominated in both basins, we found greater CPOM content in Phylloicus larvae of Upper Sa˜o Francisco sites, and this food item was related to greater riparian vegetation canopy density. The FPOM content was greater in larvae of Upper Araguari sites, and this food item was correlated with greater instream brush cover. Algae, animal tissue, vascular plant tissue and mineral material were very rare in the digestive tracts, and therefore could not be explained. These results indicate the importance of riparian vegetation structure in modulating feeding habitats of macroinvertebrates. We conclude that the Phylloicus larvae had more flexibility in what they eat than we might expect based on their traditional classification as shredders. Therefore, trusting in published classifications, ignoring regional or local differences, may be inaccurate. Instead, regional studies of feeding habits are needed for accurate classifications of invertebrate taxa into trophic guilds.
Palavras-chave: Gut contents
Aquatic macroinvertebrates
Trophic guilds
Tropical streams
Stream habitat conservation
País: Brasil
Unidade acadêmica: Instituto de Ciências Biológicas - ICB (RG)
Citação: FERREIRA, Wander R.; LIGEIRO, Raphael; MACEDO, Diego R,; HUGHES, Robert M.; KAUFMANN, Philip R.; OLIVEIRA, Leandro G.; CALLISTO, Marcos. Is the diet of a typical shredder related to the physical habitat of headwater streams in the Brazilian cerrado? Annales de Limnologie, Paris, v. 51, n. 2, p. 115-124, Mar. 2015.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1051/limn/2015004
Identificador do documento: 10.1051/limn/2015004
Data de publicação: Mar-2015
Aparece nas coleções:ICB - Artigos publicados em periódicos

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