DISTRIBUIÇÃO VERTICAL DAS MACROALGAS ADERIDAS EM RIZÓFOROS DE RHIZOPHORA MANGLE LINNAEUS NOS MANGUEZAIS DE PARNA-AÇU E TAUÁ-MIRIM (ILHA DE SÃO LUÍS/MA - BRASIL)
DOI :
https://doi.org/10.18764/Mots-clés :
Manguezal, macroalga, distribuição vertical, rizóforos.Résumé
O estudo da distribuição vertical das macroalgas aderidas em rizóforos de Rhizophora mangle L. foi realizado em três estações de coleta localizadas nos manguezais de Parna-Açu e Tauá-Mirim, ambas localizadas a sudoeste da Ilha de São Luís. Em cada estação de coleta foram amostrados cinco rizóforos, os quais foram divididos em três estratos (00–40, 40–80 e >80 cm). Para determinar a distribuição vertical das macroalgas utilizaram-se os valores de biomassa algal. A espécie Bostrychia calliptera (Montagne) ocupou toda extensão dos rizóforos, enquanto que Bostrychia tenella Lamouroux restringiu-se aos estratos (00–40 e 40–80 cm). A composição florística identificada nas três estações apresentou predomínio dos gêneros Bostrychia Montagne, Catenella Greville e Caloglossa J. Agardh. Na estiagem, os maiores valores de biomassa algal foram registrados nos estratos (00–40 e 40–80cm), com maior contribuição de Bostrychia calliptera e Bostrychia tenella. Os valores de biomassa da estação I foram mais elevados do que os registrados para as estações II e III.
Abstract
Vertical distribution of epiphytes macroalgae in rhizophores of Rhizophora mangle L. in the Parna-Açu and Tauá-Mirim’s mangroves of the São Luís/MA - Basil
The study of the vertical distribution on the epiphytes macroalgae associated with Rhizophora mangle rhizophores was accomplished in three stations the southwestern part of São Luís Island – MA. Five rhizophores were investigated in each station, that was divided en three strata (00–40, 40–80 and > 80cm). Algal biomass was used to estimate the macroalgae distribution. Bostrychia calliptera (Montagne) species occupied all extension of the rhizophores, while the Bostrychia tenella Lamouroux restricted it the strata (00–40 e 40–80cm). The floristic composition identified in the three stations was similar to those found the mangroves of the brazilian coast and of the world as well, prevailing the genus Bostrychia Montagne, Catenella Greville e Caloglossa J.Agardh. The biggest amounts of algal biomass had been registered in strata (00–40 e 40–80cm) during the dry season, with a greater contribution by Bostrychia calliptera e Bostrychia tenella species. The biomass amounts found on station I were higher than the registered for stations II e III.
Keyword: Mangrove, macroalgae, vertical distribution, rhizophores.
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