Programa de Pós Graduação em Desenvolvimento e Meio Ambiente, Universidade Estadual de Santa Cruz (UESC), Km 16 Rodovia Ilhéus-Itabuna, Ilhéus, Bahia, Brazil.
Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Km 16, Rodovia Ilhéus-Itabuna, Ilhéus, Bahia, Brazil.
Environ Monit Assess. 2020 May 24;192(6):391. doi: 10.1007/s10661-020-08318-x.
There is a strong link between habitat loss, fragmentation of natural vegetation, and reduction of biodiversity in aquatic systems. The objective of this study was to evaluate the influence of different landscape scales on the community of Ephemeroptera, Plecoptera, and Trichoptera in Atlantic Forest rivers. We sought to understand how aquatic communities are affected by different habitat structures and anthropogenic changes in different spatial scales (in radii of 30, 50, 100, 150, and 200 m). Seven points were established where eight sample campaigns were carried out between 2015 and 2016. The analyses indicate the types of land use, with forest cover being of greatest expressiveness, as determinants in the structure and diversity of the Ephemeroptera, Plecoptera, and Trichoptera community. When evaluating the effect of the scales, for the basin evaluated, it was detected that the 30 and 50 m buffers were the most representative. These buffers suggest that the configuration and composition of landscape, especially the forest cover class, have a strong influence on the composition of the aquatic entomofauna in the region. The results confirm the importance of studies at local scales regarding the relation of the landscape for Ephemeroptera, Plecoptera, and Trichoptera biodiversity in view of the particular relationship of these orders with the riparian forest for its various functions. It is concluded that riparian forests in the 30 and 50 m scales should not be modified; otherwise, aquatic biodiversity will be compromised.
生境丧失、自然植被破碎化和水生系统生物多样性减少之间存在着紧密联系。本研究的目的是评估不同景观尺度对大西洋森林河流蜉蝣目、襀翅目和毛翅目群落的影响。我们试图了解水生群落如何受到不同的栖息地结构和不同空间尺度（半径为 30、50、100、150 和 200 米）的人为变化的影响。在 2015 年至 2016 年期间设立了七个点，进行了八次样本采集。分析表明，土地利用类型，特别是森林覆盖，是决定蜉蝣目、襀翅目和毛翅目群落结构和多样性的重要因素。在评估尺度的影响时，对于所评估的流域，发现 30 和 50 米缓冲区最具代表性。这些缓冲区表明，景观的配置和组成，特别是森林覆盖类，对该地区水生昆虫区系的组成有很强的影响。研究结果证实了在地方尺度上进行研究的重要性，因为这些目与河岸森林有着特殊的关系，它们具有各种功能，因此与蜉蝣目、襀翅目和毛翅目的生物多样性有关。结论是，在 30 和 50 米尺度范围内不应改变河岸森林，否则水生生物多样性将受到损害。
