Efeitos do pisoteio humano experimental sobre a vegetação em fragmentos de Floresta Pluvial Tropical Atlântica, São Paulo, Brasil / Experimental human trampling effect on the vegetation in fragments of the Atlantic Rain Forest, São Paulo, Brazil

AUTOR(ES)

Maria Francisca Roncero Siles

DATA DE PUBLICAÇÃO

2009

RESUMO

The growing flow of visitors at natural areas, with the consequent pressure over natural resources caused an increase on concerns about the produced negative impacts. Recreation Ecology studies the impacts of recreational activities at visited environments, aiming to provide results which are useful for the management of these impacts. The effects of human trampling on vegetation have raised particular interest in several ecosystems in the world, with publications basically centered in temperate regions. An experimental trampling study was carried out in the present work to evaluate the response of vegetation in areas of Atlantic Tropical Rain Forest, at three protected areas in São Paulo State, Brazil. A randomized block design was done, on which four trampling intensity levels have been applied during an only Season with measurements taken immediately before the impact and repeated at various periods, to follow vegetation recovery. The variables analyzed were: herbaceous plant total cover, richness of plant morpho-functional types, coverage of each type and the amount of bare ground. In general, confirming previous studies in other regions, the results showed non-linear relationships between impact level and effect on measured variables on vegetation. The three studied areas had different responses, two were little resistant and resilient and the other showed moderate resistance and recovery after a year. These results can be used to subsidize future management strategies in similar areas.

ASSUNTO(S)

plant morpho-functional types vulnerabilidade tipos morfo-funcionais vegetais vulnerability resilience visitation management subsidies resistance subsídios para o manejo da visitação ecologia da recreação recreation ecology resiliência resistência

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