SciELO - Scientific Electronic Library Online

 
vol.40 número1MÉTODOS PARA ESTIMAR O VOLUME DE FUSTES E GALHOS NA FLORESTA NACIONAL DO TAPAJÓS1DOSAGEM DE MISTURA BETUMINOSA A FRIO E SEU ESTUDO SOB EFEITOS DE CARGAS ESTÁTICAS E REPETIDAS1 índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Árvore

versão impressa ISSN 0100-6762versão On-line ISSN 1806-9088

Resumo

FIORI, Leandro Fabrício; CIONEK, Vivian de Mello; SACRAMENTO, Patricia Almeida  e  BENEDITO, Evanilde. DYNAMICS OF LEAF FALL FROM RIPARIAN VEGETATION AND THE ACCUMULATION IN BENTHIC STOCK IN NEOTROPICAL STREAMS1. Rev. Árvore [online]. 2016, vol.40, n.1, pp.89-96. ISSN 1806-9088.  https://doi.org/10.1590/0100-67622016000100010.

Considering the importance of the riparian vegetation leaves as an energetic source to first order streams, the aim of the present study was to evaluate the leaf biomass contribution to the system and its temporal dynamics. With this purpose, monthly samples from July 2008 to June 2009 were collected using four sampling devices installed in three streams, in order to collect the vertical, lateral and terrestrial loads, and the benthic stock. We tested the following hypothesis: (1) leaf biomass input is higher after hydric stress periods; and (2) benthic stock biomass increase with higher loads from vertical and lateral entrances. Leaves represented 71.9% (on average) of all sampled allochthonous matter, with seasonal significant variation along the studied year. Peaks of leaf input were registered in September-October, after an increase in rainfall, and also in January, after a decrease in rainfall. Leaf input was higher in the lateral load.

Palavras-chave : Energy transfer; First order streams; Allochthonous organic matter.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )