CONTEMPORARY FRONTIERS IN BRAZILIAN AMAZON：SOME ENVIRONMENTAL CONSEQUENCES
1985, 5 (2):
The Portuguese and Neo-Brazilians who opened up the Amazon ascended the river and its tributaries, leaving behind, often essentially untouched, the wilderness through which they passed, Although they did not greatly alter the more visible elements of the interfluvial landscape, their arrival did have deleterious consequenes. The most tragic was a violent reduction in the size of the Indian population. Certain animal species, especially among the aquatic fauna, were the object of veritable carnages, as in the case of the manatee or the Amazon turtle. Contemporary governments of different political colorations, obsessed with the idea of actualizing the economic potentialities of Amazonia, have attached great importance to the region's development, One result was the construction of a new network of highways, These not only are in themselves factors of ecological modification(e.g, facilitating dispersal of species or fragmenting gene pools),but also open the way for activities that will in turn have serious ecological effects.
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