Tropical forests are the most biodiverse ecosystems on Earth. Unfortunately, they are often degraded by large enterprises that convert large areas of continuous forest into forest mosaics or into deforested areas in order to seek economic development through infrastructure construction. This study evaluates how the assemblage of nonvolant small mammals is structured after the implementation of a bauxite mining in the Saracá-Taquera National Forest, Pará, Brazil. We tested the hypothesis that the clearings for bauxite mining produce an edge effect over the small mammal assemblage and that the size of the deforested area increases the impact’s magnitude. Data collection took place through live traps from 2010 to 2012, totaling an effort of 56,220 trap nights in both impacted and pristine areas. Generalized Linear Models revealed that the size of the mined area was the main predictor explaining species impoverishment in impacted areas. Multivariate Permutational Analysis of Variance and Multivariate Dispersion Permutation Analysis revealed differences in species composition between impacted and nonimpacted sites and that these differences are due to species turnover. We recommended that concessions for land use should be rethought, especially in protected areas and when major areas are subjected to a new economic exploitation cycle.

中文翻译：

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巴西亚马逊受采矿影响地区的非挥发性小型哺乳动物（啮齿类动物和双翅目动物）组合结构

热带森林是地球上生物多样性最丰富的生态系统。不幸的是，为了通过基础设施建设谋求经济发展，大型企业往往将其退化，将大片连续森林转化为森林镶嵌区或砍伐森​​林。本研究评估了在巴西帕拉州的萨拉卡-塔克拉国家森林实施铝土矿开采后，如何构建非挥发性小型哺乳动物的组合。我们检验了以下假设：铝土矿开采的空地对小型哺乳动物群产生边缘效应，并且森林砍伐区域的大小增加了影响的幅度。数据收集是通过 2010 年至 2012 年的实时陷阱进行的，在受影响地区和原始地区总共进行了 56,220 个陷阱之夜。广义线性模型显示，雷区的大小是解释受影响地区物种贫困的主要预测因素。方差的多元排列分析和多元分散排列分析揭示了受影响和未受影响地点之间物种组成的差异，这些差异是由于物种周转所致。我们建议重新考虑土地使用特许权，特别是在保护区和主要地区处于新的经济开发周期时。方差的多元排列分析和多元分散排列分析揭示了受影响和未受影响地点之间物种组成的差异，这些差异是由于物种周转所致。我们建议重新考虑土地使用特许权，特别是在保护区和主要地区处于新的经济开发周期时。方差的多元排列分析和多元分散排列分析揭示了受影响和未受影响地点之间物种组成的差异，这些差异是由于物种周转所致。我们建议重新考虑土地使用让步，特别是在保护区和主要地区处于新的经济开发周期时。