Comparison of the Importance Indices between two species of mangrove in the coast of São Paulo-SP

Barbara Gomes Del Rey, Gabriela Campos Zeineddine, Nathalia Zantut Troncoso Orlandi, Vitória Arantes Arruda Azevedo, Rogério Martins, Fábio Giordano, Mara Magenta


The mangrove is considered a coastal ecosystem of transition between terrestrial and marine environments. Its vegetation is heterogeneous and is characterized by woody plants, shrubs and subshrubs, consisting basically of these trees genres: Rhizophora, Laguncularia, Avicennia Hibiscus and Acrostichun. Phytosociology studies the grouping of plants, their interrelationship and dependence on biotic factors in a particular environment and the combination of phytosociological relative values of each species attach a value to each. Hence, the present study aimed to compare the importance of value indices of the species found in the mangroves of Bertioga and São Vicente, and check the Dispersion Index of the species found in the Bertioga Channel. Therefore, data collections were carried out in January 2014 and 2105 and for the realization of the analysis of the data was used the Morisita Index (Id). According to the results the species with the highest Importance Value Index for the analyzed sections was Rhizophora mangle, for both areas. This kind prevails in both locations to be more resistant to various environmental conditions, since mainly occupy transition environments. Also we can conclude that the presence of more Laguncularia racemosa in mangrove São Vincente than in the Bertioga channel shows the greatest impact and anthropogenic influences that mangrove.

Keywords: mangrove species, phytosociology, Morista index

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