Effects of pyrimethanil fungicide on Chironomidae community structure

Autor(es)

Da Silva Mello, Jose Leonardo ^[1] ; Colombo, Vanessa ^{[1, 2]} ; Gorni, Guilherme Rossi ^{[1, 2]} ; Corbi, Juliano J. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Hidraul & Saneamento, Escola Engn Sao Carlos EESC, Av Trabalhador Saoca Dense 400, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Araraquara, Programa Posgrad Desenvolvimento Terr & Meio Ambi, Rua Carlos Gomes 1338, BR-14801340 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 93, n. 3 2021.
• Citações Web of Science: 0

Resumo

The use of agrochemicals in agriculture may impact aquatic ecosystems, particularly influencing the stream insect communities. Among aquatic insects, the family Chironomidae is the most abundant and species-diverse insect group found in freshwater ecosystems. However, in the southern hemisphere, studies with Chironomidae are still sparse, compared to Europe and North America. The present study evaluates the responses of Chironomidae species (Insecta: Diptera) to pyrimethanil fungicide in a mesocosm experiment. Water contamination and chironomid community were monitored over 10 months. After five months of monitoring, the pyrimethanil fungicide was completely degraded and there was a statistically significant increase in the Margalef Richness and Shannon-Wiener Index (H') in the control units when compared with the contaminated mesocosms (p = 0.003). Our results point out that the utilization of agrochemicals can be a harmful factor influencing negatively the Chironomidae populations. This finding has key implications for insect conservation strategies and ecological management environments. (AU)

• Processo FAPESP: 13/24268-2 - Utilização de quitosana na adsorção de metais em sedimentos de córregos contaminados: biorremediação das áreas impactadas e seu efeito em larvas de Chironomus xanthus
• Beneficiário: Juliano José Corbi
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular