Consulta: creatorFacets:"Saenz,David E."
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Data/hora: 02/06/2024 03:40:30

Seasonal variation in fish trophic networks in two clear-water streams in the Central Llanos region, Venezuela
Provedor de dados: Neotropical Ichthyology
Autores: Peterson,Christopher C.; Keppeler,Friedrich W.; Saenz,David E.; Bower,Luke M.; Winemiller,Kirk O.
ABSTRACT Food webs are not static entities; consumer resource interactions vary in both time and space, which complicates depiction and comparisons of food web structures. We estimated fish assemblage structure and diets in two clear-water streams in the Venezuelan Llanos region (Charcote and Charcotico) and constructed trophic networks (sub-webs defined by fishes as the principal consumers) during four periods of the annual flood pulse. As stream conditions changed from high-water to low-water, we hypothesized that: 1) the piscivore-non-piscivore ratio would increase; 2) dietary diversity would decrease; 3) interspecific dietary overlap would decline; 4) fewer allochthonous food items would be consumed; and 5) food-web connectance would increase. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic ecosystem; Flood pulse; Predation; Predator-prey interactions; Trophic niche.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200215