Benthic aquatic insects in forested and non-forested environments in rivers of the Juruá Valley

• Autor(a) principal: Barbosa, Hilarítssa Moura
• Data de Publicação: 2022
• Outros Autores: Ferreira, Hugo Luís Mendes dos Santos, Virgilio, Lucena Rocha
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biotemas (Online)
• Texto Completo: https://periodicos.ufsc.br/index.php/biotemas/article/view/90023
• topic: Bioindicators; Entomofauna; Environmental quality; Limnology; Macroinvertebrates; Bioindicadores; Entomofauna; Limnologia; Macroinvertebrados; Qualidade Ambiental

Fresh water ecosystems have been constantly threatened by anthropogenic stressors, placing a burden on benthic aquatic insect community structures. Hence, the aim of this study is to evaluate aquatic insect diversity in a gradient of forested and non-forested areas between the dry and rainy seasons in rivers of the Juruá Valley. 675 individuals were collected, 70.63% were collected during the dry season and 29.37% were collected during the rainy season, distributed among the orders Diptera, Ephemeroptera, Odonata e Trichopteran. There was greater abundance of the order Diptera when compared to the other taxons. Significant differences between the forested and non-forested environments in both seasonal periods were observed with greater diversity and equitability found in forested environments. Family richness and diversity presented a relation to oxygen levels dissolved in water and chlorophyll concentrations in forested environments during the dry season, and all environments sampled presented a slightly acidic pH, close to neutral. The study demonstrated there was a large incidence of generalist organisms whose characteristics are adaptive to negative changes, thus demonstrating that impacts caused to the localities alter aquatic insect composition.