Veredas environments play a critical role on the perennialization of streams in the Cerrado Biome, but alterations to their physiognomies are becoming increasingly more common, which directly affects abiotic variation and the structure of biological communities. Our study evaluates the effect of abiotic variations and environmental alterations upon the abundance, richness, and composition of species of semiaquatic bugs, where we test whether there are significant differences in conserved and altered veredas. Species richness was higher on altered veredas and there was no difference in abundance between altered and preserved veredas. The composition of conserved veredas was more homogeneous. Five species were associated with altered veredas and one to conserved areas. There were abiotic changes in the veredas that affected the abundance, richness, and/or composition of Gerromorpha. Ease of access to soil usage and to water for farming activities and pasture might be the main factors contributing to the alteration of veredas in this region. Gerromorpha community structure was modified by the environmental passive in areas of veredas, thus allowing to measure the degree of alterations to these systems, being a useful tool for monitoring and conservation.

中文翻译：

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改变和保存的 veredas 中半水生昆虫（昆虫纲：异翅目：Gerromorpha）多样性的变化

Veredas 环境对塞拉多生物群落中河流的常年化起着关键作用，但其地貌的改变正变得越来越普遍，这直接影响了非生物变异和生物群落的结构。我们的研究评估了非生物变异和环境改变对半水生昆虫物种的丰度、丰富度和组成的影响，我们测试了保守和改变的 veredas 是否存在显着差异。改变的 veredas 的物种丰富度更高，改变的和保存的 veredas 之间的丰度没有差异。保守的 veredas 的组成更加均匀。五种物种与改变的 veredas 相关，一种与保护区有关。veredas 发生了非生物变化，影响了丰度、丰富度、和/或 Gerromorpha 的成分。易于获得土壤使用和农业活动和牧场用水可能是导致该地区 veredas 改变的主要因素。Gerromorpha 群落结构被 veredas 地区的环境被动修改，从而允许测量这些系统的变化程度，成为监测和保护的有用工具。