Data/hora: 03/06/2024 08:43:10

Provedor de dados: | Revista Brasileira de Botânica
País: | Brazil
Título: | The succession dynamics of a macroalgal community after a flood disturbance in a tropical stream from São Paulo State, southeastern Brazil
Autores: | Branco,Ciro Cesar Z.; Branco,Luis Henrique Z.; Moura,Maurício Osvaldo; Bertusso,Fernando Rodrigo.
Data: | 2005-06-01
Ano: | 2005
Palavras-chave: | Disturbance; Macroalgae; Rainfall; Stream; Succession; Tropical.
Resumo: | The succession dynamics of a macroalgal community in a tropical stream (20º58' S and 49º25' W) was investigated after disturbance by a sequence of intensive rains. High precipitation levels caused almost complete loss of the macroalgal community attached to the substratum and provided a strong pressure against its immediate re-establishment. After this disturbance, a weekly sampling program from May 1999 to January 2000 was established to investigate macroalgal recolonization. The community changed greatly throughout the succession process. The number of species varied from one to seven per sampling. Global abundance of macroalgal community did not reveal a consistent temporal pattern of variation. In early succession stages, the morphological form of tufts dominated, followed by unbranched filaments. Latter succession stages showed the almost exclusive occurrence of gelatinous forms, including filaments and colonies. The succession trajectory was mediated by phosphorus availability in which community composition followed a scheme of changes in growth forms. However, we believe that deterministic and stochastic processes occur in lotic ecosystems, but they are dependent on the length of time considered in the succession analyses.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000200007
Editor: | Sociedade Botânica de São Paulo
Relação: | 10.1590/S0100-84042005000200007
Formato: | text/html
Fonte: | Brazilian Journal of Botany  v.28 n.2 2005
Fonte: | info:eu-repo/semantics/openAccess