Herbicides employed in sugarcane plantations have lethal and sublethal effects to larval Boana pardalis (Amphibia, Hylidae)

Autor(es)

Moutinho, Mariana F. ^[1] ; de Almeida, Eduardo A. ^{[2, 3]} ; Espindola, Evaldo L. G. ^[4] ; Daam, Michiel A. ^[5] ; Schiesari, Luis ^[6]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Programa Posgrad Ecol, Sao Paulo - Brazil

^[2] Univ Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Sao Jose do Rio Preto - Brazil

^[3] Fundacao Univ Reg Blumenau, Blumenau - Brazil

^[4] Univ Sao Paulo, Ctr Recursos Hidr & Ecol Aplicada, Escola Engn Sao Carlos, Sao Paulo - Brazil

^[5] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Ciencias Ambientais & Engn, Lisbon - Portugal

^[6] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Ave Arlindo Beta 1000, BR-03828000 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOTOXICOLOGY; v. 29, n. 7, p. 1043-1051, SEP 2020.
• Citações Web of Science: 5

Resumo

The increasing demand for biofuels favored the expansion of sugarcane and, as a consequence, in the consumption of pesticides in Brazil. Amphibians are subject to pesticide exposure for occurring in or around sugarcane fields, and for breeding at the onset of the rainy season when pesticide consumption is common. We tested the hypothesis that herbicides used in sugarcane crops, although employed for weed control and manipulated at doses recommended by the manufacturers, can cause lethal and sublethal effects on amphibian larvae. Boana pardalis was exposed to glyphosate, ametryn, 2,4-D, metribuzin and acetochlor which account to up to 2/3 of the volume of herbicides employed in sugarcane production. High mortality was observed following prolonged exposure to ametryn (76%), acetochlor (68%) and glyphosate (15%); ametryn in addition significantly reduced activity rates and slowed developmental and growth rates. AChE activity was surprisingly stimulated by glyphosate, ametryn and 2,4-D, and GST activity by ametryn and acetochlor. Some of these sublethal effects, including the decrease in activity, growth and developmental rates, may have important consequences for individual performance for extending the larval period, and hence the risk of dessication, in the temporary and semi-permanent ponds where the species develops. Future studies should seek additional realism towards a risk analysis of the environmental contamination by herbicides through experiments manipulating not only active ingredients but also commercial formulations, as well as interactions among contaminants and other environmental stressors across the entire life cycle of native amphibian species. (AU)

• Processo FAPESP: 11/05280-6 - Ecotoxicidade comparativa de pesticidas usados em plantações de cana-de-açúcar sobre larvas de anfíbios
• Beneficiário: Mariana Fekete Moutinho
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 15/18790-3 - Consequências ambientais da conversão pastagem-cana-de-açúcar e intensificação de pastagens
• Beneficiário: Luiz Antonio Martinelli
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 08/57939-9 - Impactos da expansão da agroindústria da cana-de-açúcar sobre comunidades aquáticas
• Beneficiário: Luis Cesar Schiesari
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Jovens Pesquisadores