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Title: Composition and dynamics of allochthonous organic matter inputs and benthic stock in a Brazilian stream
Authors: França, Juliana Silva
Gregório, Rener Silva
Paula, Joana D'arc de
Gonçalves, José Francisco Júnior
Ferreira, Fernando Alves
Callisto, Marcos
Keywords: Abundance
Community Composition
Organic Matter
Perennial Plant
Riparian Vegetation
Riparian Zone
Croton Urucurana
Tapirira Obtusa
Issue Date: 2009
metadata.dc.publisher.journal: Marine and Freshwater Research
metadata.dc.relation.ispartof: Volume 60, Número 10, Pags. 990-998
Abstract: Riparian vegetation provides the nutrient and energy input that maintains the metabolism and biodiversity in tropical headwater streams. In the present study, it was hypothesised that ∼30% of riparian plant species contribute over 70% of coarse particulate organic matter and, because tropical plants are perennial and semi-deciduous, it was expected that leaf fall would occur year round. The aims of the present study were to evaluate the composition and structure of the plant riparian zone and the input and associated benthic stock of organic matter. The riparian vegetation was composed of 99 taxa. The most abundant plant species were Tapirira obtusa, Sclerolobium rugosum, Croton urucurana, Byrsonima sp. and Inga sp. The input and benthic stock showed a seasonal pattern, with higher values recorded at the end of the dry season and at the beginning of tropical storms. The biomass contributed monthly by the vegetation ranged from 28 ± 6 g m-2 to 38 ± 11 g m -2, and the mean monthly benthic standing stock was 138 57 g m -2. The results illustrate the importance of riparian vegetation as an energy source to tropical streams and how individual plant species contribute to organic matter inputs in these ecosystems. © CSIRO 2009.
metadata.dc.identifier.doi: 10.1071/MF08247
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