Integrated ecosystem models (soil-water) to analyze pesticide toxicity to aquatic organisms at two different temperature conditions

Autor(es)

de Figueiredo, Livia Pitombeira ^{[1, 2]} ; Athayde, Danillo B. ^{[1, 2]} ; Daam, Michiel A. ^[3] ; Guerra, Glauce ^[4] ; Duarte-Neto, Paulo Jose ^[4] ; Sarmento, Hugo ^[5] ; Espindola, Evaldo L. G. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, PPG SEA, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos - Brazil

^[2] Univ Sao Paulo, NEEA CRHEA SHS, Sao Carlos Sch Engn, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos - Brazil

^[3] Univ Nova Lisboa, Fac Sci & Technol, Dept Environm Sci & Engn, CENSE, P-2829516 Caparica - Portugal

^[4] Rural Fed Univ Pernambuco, Dept Stat & Informat, PPGBEA, R Dom Manoel de Medeiros S-N, BR-52171900 Recife, PE - Brazil

^[5] Fed Univ Sao Carlos UFSCar, Dept Hydrobiol, Lab Microbial Proc & Biodivers, BR-13565905 Sao Carlos - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Chemosphere; v. 270, MAY 2021.
• Citações Web of Science: 0

Resumo

In order to increase the knowledge about pesticides considering the soil-water interaction, ecosystem models (mesoscosms) were used to analyze the of leachate on the immobility and feeding rate of the cladocerans, Ceriodaphnia silvestrii and D. similis and algae Raphidocelis subcapitata, at two different temperatures. Mesocosm were filled with natural soil (latosolo) that were contaminated with insecticide/acaricide Kraft 36 EC (R) and fungicide Score 250 EC (R), using the recommended concentration for strawberry crops (10.8 g abamectin/ha and 20 g difenoconazole/ha). Pesticides were applied once (hand sprayers) and the precipitation was simulated twice a week (Days 1, 4, 8, 11, 15 and 18). The mesocosm were kept in a room with a controlled temperature (23 and 33 degrees C) and photoperiod (12h light/12h dark). The Kraft 36 EC (R) insecticide showed toxicity for both species of cladocerans tested, with effects on immobility and feeding rate, both at 23 and 33 degrees C. Score 250 EC (R) showed to be toxic only for the experiments that analyzed the immobility of C. silvestrii at 23 degrees C and the feeding of D. smilis at 33 degrees C, demonstrating that the effects are species-specific and related to the temperature at which they are tested. While for species R. subcapitata there was an effect only for mixture treatments of the pesticides analyzed at both temperatures. Thereby, zooplanktonic organisms may be at risk when exposed to this compound even after percolating in a soil column, which could lead to effects on the entire aquatic trophic chain and that temperature can influence the organism response to the contaminant. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 15/24628-4 - Análise da influência da temperatura no destino e na toxicidade de pesticidas em ecossistemas terrestres e aquáticos utilizando sistemas experimentais integrados
• Beneficiário: Livia Pitombeira de Figueirêdo
• Modalidade de apoio: Bolsas no Brasil - Doutorado