| Autor: |
Loureiro RC; Programa de Pós-graduação em Biologia de Ambientes Aquáticos Continentais, Universidade Federal do Rio Grande, Av. Itália, Km 8 - Campus Carreiros, Rio Grande, Rio Grande do Sul, 96203-900, Brazil. rafacloureiro@gmail.com., Calisto JFF; Programa de Pós-graduação em Ciências Ambientais, Área de Ciências Naturais e Exatas, Universidade Comunitária da Região de Chapecó, Avenida Senador Atílio Fontana, Chapecó, SC, 591E89809-000, Brazil., Magro JD; Programa de Pós-graduação em Ciências Ambientais, Área de Ciências Naturais e Exatas, Universidade Comunitária da Região de Chapecó, Avenida Senador Atílio Fontana, Chapecó, SC, 591E89809-000, Brazil., Restello RM; Programa de Pós-graduação em Ecologia, Universidade Regional Integrada do Alto Uruguai e das Missões, Av. Sete de Setembro, Erechim, Rio Grande do Sul, 162199709-910, Brazil., Hepp LU; Programa de Pós-graduação em Biologia de Ambientes Aquáticos Continentais, Universidade Federal do Rio Grande, Av. Itália, Km 8 - Campus Carreiros, Rio Grande, Rio Grande do Sul, 96203-900, Brazil.; Universidade Federal de Mato Grosso do Sul, Campus Três Lagoas, Av. Ranulpho Marques Leal, 3484, Três Lagoas, Mato Grosso do Sul, 79613-000, Brazil. |
| Abstrakt: |
In regions with intense agricultural activity, increases in heavy metal concentrations in aquatic environments are common. Among the metals associated with agricultural activities, copper (Cu) and cadmium (Cd) have been found to directly affect aquatic trophic structures due to the ease of incorporation by primary producers and consuming organisms. Aquatic insects are predominantly found in streams, and their presence is determined by environmental characteristics and food availability. In this study, we seek to understand how the incorporation of Cu and Cd by scraper insects relates to their environment and food sources. We collected water, sediment, biofilm and scraper insect samples in streams with different intensities of agricultural activities in the drainage areas. The intensity of agricultural activities in the catchment area positively influenced the Cu and Cd concentrations in organisms and other aquatic compartments. The metals were readily incorporated by the biofilms. Although the functional characteristics are important to understand the functioning of ecosystems, in this study, we found that the physiological characteristics can be determinants in the concentrations of metals in aquatic insects. |
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