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Provedor de dados:  Acta Amazonica
País:  Brazil
Título:  Omnivory and resource - sharing in nutrient - deficient Rio Negro waters: stabilization of biodiversity?
Autores:  Walker,Ilse
Data:  2009-09-01
Ano:  2009
Palavras-chave:  Amazonas
Rio Negro
Resumo:  Amazonian biodiversity is notorious, this is also valid for the fauna of the mineral-deficient waters of the Rio Negro System. Some 25 years of research on the benthic fauna of Central Amazonian streams resulted in species-rich foodwebs with a high degree of omnivory within dense animal communities. To exemplify the taxonomic range of omnivorous consumers, the detailed resource spectra of 18 consumer species, including Protozoa (2 species), Platyhelminthes (1 species), insects (2 species), fish (6 species) and shrimps (Decapoda, 7 species), associated primarily with the benthic habitats of Rio Negro tributaries, are presented. Special features of omnivory are characterized, and the importance of litter-decomposing fungi as essential energy input into the foodwebs is documented. It is shown that general omnivory -diverse omnivore consumers sharing most of the resource types- is a prevalent feature. The relevance of this general omnivory for the maintenance of biodiversity is discussed.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Instituto Nacional de Pesquisas da Amazônia
Relação:  10.1590/S0044-59672009000300017
Formato:  text/html
Fonte:  Acta Amazonica v.39 n.3 2009
Direitos:  info:eu-repo/semantics/openAccess

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