Estudo comparativo sobre as alterações de uma área de manguezal da Serra do Guararú (Bertioga/SP)

Patricia Nogueira, Jaqueline Cabral, Solange Cabral, Glaucio Bassan, Henrique Souza

Abstract


The mangrove ecosystem is characterized by the plant community found in the coastal zone extension, exposed to the transitional actions of the marine, estuarine and lagoon environment and develop in calm waters, where the movement of the tides originates variants in the indices of salinity, where plant species have their own adaptation systems. In 2015, Garcia et al. collected qualitative and quantitative data of juvenile plants from a mangrove forest of  Serra do Guararú Environmental Preservation Area, Guarujá / SP. The authors analyzed the area located at the coordinates 23º51'41 "S; 46º08'41 "W, the same place as this work. At the time, a total of 2,842 young individuals were found, of which 2,101 belonged to the Rhizophora mangle (red mangrove), 318 of Avicennia schaueriana (black mangrove) and 423 of Laguncularia racemosa (white mangrove) Being 838 of the species Rhizophora mangle, 80 Laguncularia racemosa and 137 Avicennia schaueriana. Based on the numbers presented, it is possible to infer that the area is not regenerating as expected because it is an area of environmental preservation, which means that not only does landfill in a contiguous region contribute to this scenario, but the constant Academic visits to the site, which can contribute to the decrease of individuals, since the constant exploration of the area ends up changing the characteristics of the soil, besides the fact that many plants end up being damaged (trampled) in an unintentional way and the excess of river traffic. By the distribution of the species, it is possible to believe that environmental factors, especially the low salinity can cause the change in the quantity (in this case, reduction) of species.  


Key words: Mangrove, distribution, comparison, phytophysiognomy, zonation, anthropogenic interventions.

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