Acute toxicity of inorganic nitrogen (ammonium, nitrate and nitrite) to tadpoles of five tropical amphibian species

Autor(es)

Daam, Michiel A. ^[1] ; Ilha, Paulo ^[2] ; Schiesari, Luis ^[3]

Afiliação do(s) autor(es)

^[1] Univ Nova Lisboa, Dept Environm Sci & Engn, Fac Sci & Technol, CENSE, P-2829516 Lisbon - Portugal

^[2] Univ Sao Paulo, Programa Posgrad Ecol, Inst Biociencias, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Ave Arlindo Bettio 1000, BR-03828000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOTOXICOLOGY; v. 29, n. 9 JUL 2020.
• Citações Web of Science: 0

Resumo

Despite the higher diversity of amphibians and the increasing use of agrochemicals in tropical countries, knowledge on the ecotoxicity of such compounds to tropical amphibians remains very limited. The aim of this study was, therefore, to assess the acute lethal toxicity of three nitrogen salts (ammonium sulphate, sodium nitrate and sodium nitrite) to tadpoles of five tropical frog species:Rhinella ornata,Boana faber,B. pardalis,Physalaemus cuvieri, andP. olfersii. The order of sensitivity to the nitrogen salts for all five species was sodium nitrite > ammonium sulphate > sodium nitrate. There was not a single most sensitive species to all three nitrogen salts. However, differences in generated 4-d LC50 values between the most and least sensitive test species were small (a factor 2 to 6). A comparison with published toxicity values does not suggest an intrinsic higher, or lower, sensitivity of the tropical species tested as compared to their temperate counterparts. Reported nitrogen concentrations in sugarcane fields do not indicate a lethal risk to the amphibian species tested. Chronic-exposure and field studies are recommended to evaluate amphibian sensitivity under environmental-realistic multiple-stressor conditions. (AU)

• 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