Abstract
We investigated the Bucatú microbasin in order to characterize the structure and composition of its surrounding mangrove area by recording the main anthropic interferences on the vegetation. This study was performed along 10 plots (1000 m2 in total), perpendicular to the estuarine canal. Deposition and accumulation of sediments on the plants root system were evaluated using auger holes and photographs. Four plant species, Laguncularia racemosa (L.) Gaertn. (White Mangrove), Rhizophora mangle L. (Red Mangrove), Conocarpus erectus L.(Silver-leaved Buttonwood), and Annona glabra L. (Pond-apple) were recorded. The structural parameters obtained were low, and a great number of dead plants were observe d, most of them of the species L. racemosa. Sediment deposition rates of 10-15 cm were recorded. Silting in the mangrove area and alterations of water flow in the drainage basin of the Bucatu River were the main anthropic effects observed, exerting a high negative impact on the mangrove ecosystem we investigated.
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