Benthic invertebrate community and trophic structure in two man-made lakes

• Autor(a) principal: Topulniak, Sílvia
• Data de Publicação: 2019
• Outros Autores: Pereira, Luci Fátima, Buggenhagen, Tayane Cristina, Bueno-Krawczyk, Ana Carolina de Deus
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Biotemas (Online)
• Texto Completo: https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2019v32n1p31

Benthic invertebrates are important in both stream and lentic ecosystems, due to their ecological contribution in the nutrient cycling energy flow through the trophic levels. This study aimed to determine the community of benthic invertebrates and to characterize their trophic groups in two lakes located in Parque dos Imigrantes (Mallet, PR, Brazil). Samples were collected using a sieve with a diameter of 30 cm, with a mesh of 0.05 mm in February of 2014, totaling six samples in each lake. We collected 271 benthic invertebrates in the lakes. Over 24 taxa were identified to the genus level, and occurred in three functional trophic groups (FTG). The taxa that contributed most to the community were Belostomatidae, Notonectidae, Chironomidae and Hydropsychidae. A greater abundance of predators was observed, followed by collectors and filterer-gatherers. This work showed that the local characteristics of the lakes influenced the abundance of sampled benthic community, although there was no difference in the structure of trophic groups between the two lakes.