Análise estrutural e da vulnerabilidade ambiental de um fragmento florestal de restinga ao Sul do Estado do Espírito Santo
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Data
2010-10-01
Autores
Leite, Vinícius Rocha
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Universidade Federal do Espírito Santo
Resumo
The aim of this study was to analyze the environmental vulnerability of a forest remnant of restinga, the structure of woody vegetation and floristic similarity of a whole compared to other remnants of Atlantic Forest. We performed a cover mapping and land use in the surrounding forest fragment, identifying the manmade agents that exert pressure on the fragment. Through the use of computational procedures using a Geographic Information System could the spatial model of vulnerability. Seven were identified as causative agents of anthropogenic potential impacts. The model was effective for the environmental impact study, indicating areas of greatest need for mitigation of impacts, and the general physiognomy of the vegetation the main aspect evaluated for model building. The analysis of vegetation structure was performed from the allocation of twenty permanent plots of 20x50 feet each. From the demarcation of all individuals with DBH = 5 cm height of 1.30 m of soil within plots, was performed for action in diameter and total height of individuals. Samples were collected in sterile and fertile material in and out of permanent plots. Found 2331 trees, 161 species in 42 families and 91 genera. Through research in the specific literature was found non-timber forest resources as timber and the presence of 36 species in 23 families, considering the uses for medicine, technology, food, construction, decoration and wood. Studying the horizontal structure is observed that nearly half of the species present condition of tillering. Regarding the diameter structure note a typical pattern and the presence of large individuals. The occupation of different strata of forest demonstrates a good regulation of the same in this regard. The diversity indices calculated proved to be superior compared to those found for other remnants of restinga forest. The evaluation of the floristic similarity was carried out considering other forests and restinga forest remnants of Seasonal Semideciduous Forest (SSF), with reference to the River Basin Itapemirim, also considering a database climate based on temperature, rainfall and climatic water balance. The coefficient of similarity was not high comparing the remnant area shows a marked floristic variation along the coast in a short amount of territory. The similarity index and some structural vegetation data, comparing the restinga studied in the areas of Seasonal Semideciduous Forest line with present climate variability
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Geographic Information System , Forest Ecology , Climatology , Sistema de Informações Geográficas , Ecologia Florestal , Climatologia
Citação
LEITE, Vinícius Rocha. Análise estrutural e da vulnerabilidade ambiental de um fragmento florestal de Restinga ao Sul do Estado do Espírito Santo. 2010. 102 f. Dissertação (Mestrado em Ciências Florestais) — Universidade Federal do Espírito Santo, Centro de Ciências Agrárias, Jerônimo Monteiro, 2010.