文章基本信息

标题：Diversidade da comunidade de macroinvertebrados bentnicos no reservatório de Volta Grande, Bacia do Baixo Rio Grande
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作者：Paulo Ricardo da Silva Camargo ; Newton Pimentel Ulha Barbosa ; Antnio Valado Cardoso 等
期刊名称：Research, Society and Development
电子版ISSN：2525-3409
出版年度：2022
卷号：11
期号：7
页码：1-15
DOI：10.33448/rsd-v11i7.30213
语种：English
出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：The benthic macroinvertebrate community is composed of some organisms that are more sensitive and others more resistant to environmental changes. In this sense, they are used as a bioindicator. The present work aimed to verify the local species diversity (alpha diversity) of the macroinvertebrate community in two stretches of the Lower Rio Grande Basin with distinct substrate composition. The study was carried out at two sites on the Rio Grande. At point 1, sediment samples were collected over a period of twelve months, where the diversity index of the parameters richness (S), abundance, dominance, Shannon-Wiener diversity (H'), Simpson diversity (D') and equitability (J) were calculated and through the non-parametric Kruskal-Wallis analysis were compared between all the months of the year, as well as the rainy and dry seasons. At point 2, artificial objects were calculated and diversity indices were calculated, also including the rainy and estimation seasons. In point 1 there was no significant difference between the rainy and dry seasons, but there were differences in abundance and evenness between all months sampled. In point 2 it was evident that the diversity index values were higher during the dry season. In summary, it was inferred that the benthic communities may be under the reflex of environmental homogenization resulting from anthropic activities. Therefore, these diversity indices can be an adequate tool to understand the environment, and thus promote more assertive mitigation decisions in favor of the conservation of species.
关键词：Ecological interactions;Diversity index;Zoobenthos.