Dinâmica da paisagem e a fragilidade natural e antrópica da fronteira agrícola no Oeste da Bahia
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Data
2014-07-04
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Universidade Federal de Goiás
Resumo
The formation of the agricultural frontier in Western Bahia occurred from the
mid-1980s and was dependent on investments in capital and technology for the
transformation of land use, through agricultural modernization in areas where soil and
climatic characteristics were appropriate to their formation and expansion. However, the
intrinsic link of the expansion of the agricultural frontier with the economic
development policy resulted in fragmentation of the landscape and increasing incidence
of environmental fragility. The specific objectives of this dissertation were: (i) to
understand the temporal-spatial dynamics of the border in the Cerrado of Bahia; (ii) to
develop an index that reflects the agricultural modernization process of the frontier in
the Cerrado of Bahia; (iii) to analyze the heterogeneity of the border as well as the
impacts of the occupation process in the Cerrado of Bahia from the socio-economic
aspects point of view; (iv) to study the dynamics of landscape of Rio Preto
Hydrographic Basin (BHRP) underneath the aspect of fragmentation or structural
quality of the landscape by building the index of structural quality of the landscape; and
(v) to distinghish the BHRP´s environmental fragility, demonstrating the interference of
agricultural modernization in the environmental stability. The results indicated a lack of
homogeneity in the degree of modernization among the different micro-regions as well
as between the municipalities of each microregion. Barreiras, Formosa do Rio Preto,
Luís Eduardo Magalhães and São Desidério municipalities were the most modernized,
particularly by intensive agriculture. The increased level of agricultural modernization
caused significant changes in social relations and demonstrated that the modernized
agriculture showed a negative relationship with poverty and positively with Human
Development Index. The data showed a continued loss of natural habitat during the
thirty years of land use and occupation of the soil, followed by a change in the
landscape matrix, particularly the priority sub-basins to the expansion of agriculture. At
last, the economic pattern of agricultural crops, more modernized, influenced more
negatively on the emerging weakness than that of livestock and on reducing the
structural quality of the basin resulting from fragmentation of the landscape.
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SANTOS, Crisliane Aparecida Pereira dos. Dinâmica da paisagem e a fragilidade natural e antrópica da fronteira agrícola no Oeste da Bahia. 2014. 147 f. Tese (Doutorado em Ciências Ambientais) - Universidade Federal de Goiás, Goiânia, 2014.