The objective of this study was to evaluate landscape scenarios, based on landscape attributes and using a geographic information system. The Mambucaba river watershed, an important redoubt of Atlantic Forest, was our case study. We simulated a hypothetical scenario, assuming the absence of human interferences. This scenario was compared with the recent scenario with the use of the overlay method. The combination of diverse thematic maps evidenced a great environmental variability resulting from biophysical factors and soil use and occupation. A great environmental complexity was verified. We obtained 84 territorial units free from human pressures. In the recent scenario, the landscape presented even more variability and complexity (111 territorial units). The trails had been identified as structures responsible for the origin and distribution of the negative impacts for all the Mambucaba landscape. Procedures for management and conservation of this study area were recommended.
Landscape ecology; fragmentation; Dense Ombrophylous Forest
