Análise da estrutura da paisagem da alta bacia do rio Araguaia na savana brasileira
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Data
2010-12
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Resumo
Landscape structure analysis of the upper Araguaia river basin in the brazilian savanna. The Central-
West region of Brazil was extensively covered by Savanna physiognomies at the end of 1970`s, when
large transformations, due to expansion of agriculture frontier and agriculture modernization, promoted
an intensive and fast deforestation. The vegetation that remains today is in the fragments form, which
can suffer several effects that can lead to the decrease or disappearance of species. The changes that
occurred in a landscape can be studied through the methods of Landscape Ecology, by evaluating the
indices or metrics for quantitative characterization, allowing to compare landscapes, identify differences
and determine relationships between the functional processes and the patterns of those landscapes. The
objective of this paper was to analyze the structure of the landscape in the upper Araguaia river basin, in
five years (1977, 1989, 1997, 2002 and 2006), to evaluate its pattern of fragmentation along the time,
after the intensive deforestation. The results showed that the methodology used was satisfactory. The
fragmentation revealed notable rate of conversion of the original physiognomies in pasture and
agricultural lands and the metrics of the area, core area, shape and isolation of the natural classes showed
that the fragments, in relation to its integrity, are under strong threat.
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Métricas da paisagem, Landscape metrics, Fragstats, Integridade dos fragmentos, Fragmentação, Fragstats, Fragmentation, Fragments integrity
Citação
CABACINHA, Christian Dias; CASTRO, Selma Simões; GONCALVES, Demerval Aparecido. Análise da estrutura da paisagem da alta bacia do rio Araguaia na savana brasileira. Floresta, Curitiba, v. 40, n. 4, p. 675-690, out./dez. 2010.