Dinâmica de ocupação espacial de áreas contíguas (Período 1987-2008) e sua relação com tensores de origem antrópica no manguezal do Rio Cachoeira, Ilhéus, Bahia / Spatial occupation dynamic of the adjacencies areas (period 1987-2008) and your relation with anthropic tensors in the mangrove forest at Cachoeira River, Ilhéus, Brazil

Abstract

This work aims to identify, by geoprocessing techniques, spaces changes occurred in the CachoeiraRiver mangrove, Ilhéus, Bahia, and adjacent areas during the period of 21 years, correlating itwith elements of anthropogenic origin. Four thematic categories were identified and mapped:mangrove, water, urban, and adjacent systems. Over the years there was the advance of the urbanarea at the expense of the mangrove and other adjacent systems, concurrently increasing the human pressure on the mangroves. Problems of economic order and the consequent fluctuation of thepopulation in the city caused the occurrence of various forms of suppression on the mangrove, suchas cutting, landfill, launch of solid waste, etc. associated with low quality of life around the mangrove.In contrast, there was the conservation of the mangrove due to difficult access on the oppositeshore of the city, in association with the presence of Private Reserve of Natural Heritage. Theadvancement of human pressures identified in the current situation go against the possibility ofnatural regeneration to the ecosystem. Even eliminated the stress factor, the metabolism of thesystem may present negative irreversible implications. Maintaining the pace and pattern of therecorded change in the last years, the gain of territory on the Cachoeira river mangroves hardlywill be interruped in the coming years. Thus, the county gained territory and loses an inestimableand valuable ecosystem and can cause social problems in the near future.

Keywords

• Geotecnology
• Environment impact
• Biogeography.