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Tipo do documento: Artigo
Título: The role of physical and political factors on the conservation of native vegetation in the brazilian forest-savanna ecotone
Autor: Sawakuchi, Henrique Oliveira
Ballester, Maria Victoria Ramos
Ferreira, Manuel Eduardo
Abstract: The Araguaia River Basin covers a considerable extent of Brazilian Savanna (locally called Cerrado) and part of Amazon Tropical Rainforest, embracing high biodiversity and a vast flooding area. This region has been converted to agricultural lands since 1970s, for the past four decades, leading to a fragmented land- scape that holds one of the few large remaining blocks of Cerrado primary vegetation. Therefore, to as- sess the degree of preservation of this area a 2007 primary vegetation map was derived through Boolean operations using land use and land cover maps from 1975, 1985, 1996 and 2007, from digital classifica- tion of Landsat MSS and TM images. To evaluate the role of driving factors on the presence of pristine vegetation, a logistic regression analyses was performed. Tested factors were: distance from roads and cities, terrain slope, land tenure, soil fertility and flooding. We found statistical significant values (p < .05) showing that distance from roads and cities, the increase in slope, the presence of protected areas, indige- nous lands, wetlands and areas with low fertility have positive influence on the presence and maintenance of these pristine areas. The occurrence of original vegetation in many cases is associated with environ- mental constraints that difficult or do not allow agricultural use. Analysis of physical and political factors, which may have direct or indirect influence on the conservation and degradation of native vegetation are very important for the comprehension of the dynamics of regional land use, and provide supporting in- formation for a more efficient and sustainable regional landscape planning.
Palavras-chave: Amazon-cerrado transition
Pristine vegetation
Driving factors
Araguaia river basin
Regional planning
País: China
Unidade acadêmica: Escola de Agronomia e de Engenharia de Alimentos - EA (RG)
Citação: SAWAKUCHI, Henrique O.; BALLESTER, Maria Victoria R.; FERREIRA, Manoel Eduardo. The role of physical and political factors on the conservation of native vegetation in the brazilian forest-savanna ecotone. Open Journal of Forestry, Wuhan, v. 3, n. 1, p. 49-56, Jan. 2013.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.4236/ojf.2013.31008
Identificador do documento: 10.4236/ojf.2013.31008
Data de publicação: Jan-2013
Aparece nas coleções:EA - Artigos publicados em periódicos

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