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Isotopic variation among Amazonian floodplain woody plants and implications for food-web research Biota Neotropica
Correa,Sandra Bibiana; Winemiller,Kirk; Cárdenas,Dairon.
Isotopic variation within food sources adds uncertainty to models intended to reconstruct trophic pathways. Understanding this variation is pivotal for planning sampling protocols for food-web research. This study investigates natural variation in C and N stable isotopes among plant species in two western Amazon flooded forests with contrasting watershed biogeochemistry (white-water várzea-forest and black-water igapó-forest). Our objectives were to compare δ13C and δ15N of leaves and fruits between sites; assess the magnitude of within-site variation in δ13C and δ15N of leaves (várzea: 28 spp., igapó: 10 spp.) and fruits (várzea: 22 spp., igapó: 22 spp.); determine within-plant variation in δ13C and δ15N of leaf, wood and fruit tissues; and test whether...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Stable isotopes; Igapó; Várzea; Fruits; Food web; Mixing model.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000200207
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