Pesticide distribution and ecotoxicological risk in the Ayuquila-Armería river

Contenido principal del artículo

Brian Arturo Rodríguez-Aguilar
Luis Manuel Martinez-Rivera
Roberto Muñiz-Valencia
Norman Mercado-Silva
Luis Ignacio Iñiguez-Dávalos
Alejandro Aarón Peregrina-Lucano

Resumen

Pesticides make an important contribution to increased global agricultural production; however, their intensive use represents a risk to biota in both the short and long terms. The physical and chemical characteristics of these compounds, as well as their versatility in agricultural, domestic, and public health use, have led them to become widely present in the environment. The objectives of this study were to evaluate the spatiotemporal distribution of pesticides in the surface water of the Ayuquila-Armería river and to conduct an ecotoxicological risk assessment in algae, macroinvertebrates, and fish. The presence of 11 analytes was determined, being λ-cyhalothrin, ametrine, and malathion the pesticides with highest concentrations, and carbendazim, malathion, and glyphosate those with the highest frequency of detection (> 70 %). The number of pesticides detected per sample presented no significant temporal differences, and there was no significant effect of the crops or vegetation adjacent to the study sites on the number of pesticides detected per sample. The sampling conducted in November 2019 (wet season) presented the greatest difference in concentrations of most pesticides, compared to the other samplings. The ecotoxicological risk assessment showed that the macroinvertebrates (Daphnia magna) are the most vulnerable to the concentrations of pesticides in surface water, followed by fish and algae. Regulation of the importation, trade, and management of malathion and λ-cyhalothrin is crucial in order to reduce the presence of their residues and the risks associated with them.

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Detalles del artículo

Biografía del autor/a

Brian Arturo Rodríguez-Aguilar, Universidad de Guadalajara

Departamento de Ecología y Recursos Naturales

Roberto Muñiz-Valencia, Universidad de Colima

Profesor Investigador

Facultad de Ciencias Químicas, Universidad de Colima, Carretera Colima-Coquimatlán km 9, 28400, Coquimatlán, Colima, México.

Luis Ignacio Iñiguez-Dávalos, Universidad de Guadalajara

Profesor Investigador

Centro Universitario de la Costa Sur

Departamento de Ecología y Recursos Naturales

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