Distribution of pesticides and some of their transformation products in a small lentic waterbody: Fish, water, and sediment contamination in an agricultural watershed - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Environmental Pollution Année : 2022

Distribution of pesticides and some of their transformation products in a small lentic waterbody: Fish, water, and sediment contamination in an agricultural watershed

Laure Pasquini
  • Fonction : Auteur
  • PersonId : 924985
Laurence Curtet
Jean-Marc Baudoin
  • Fonction : Auteur
  • PersonId : 1088483
Xavier Dauchy
  • Fonction : Auteur
  • PersonId : 923178

Résumé

More than 20 years after the Water Framework Directive was adopted, there are still major gaps in the sanitary status of small rivers and waterbodies at the head of basins. These small streams supply water to a large number of wetlands that support a rich biodiversity. Many of these waterbodies are fishponds whose production is destined for human consumption or for the restocking of other aquatic environments. However, these ecosystems are exposed to contaminants, including pesticides and their transformation products. This work aims to provide information on the distribution, diversity, and concentrations of agricultural contaminants in abiotic and biotic compartments from a fishpond located at the head of watersheds. A total of 20 pesticides and 20 transformation products were analyzed by HPLC-ESI-MS/MS in water and sediment sampled monthly throughout a fish production cycle, and in three fish species at the beginning and end of the cycle. The highest mean concentrations were found for metazachlor-OXA (519.48 +/- 56.52 ng.L-1) in water and benzamide (4.23 +/- 0.17 ng g(-1) dry wt.) in sediment. Up to 20 contaminants were detected per water sample and 26 per sediment sample. The transformation products of atrazine (banned in Europe since 2003 but still widely used in other parts of the world), flufenacet, imidacloprid (banned in France since 2018), metazachlor, and metolachlor were more concentrated than their parent compounds. Fewer contaminants were detected in fish and principally prosulfocarb accumulated in organisms during the cycle. Our work brings innovative data on the contamination of small waterbodies located at the head of a basin. The transformation products with the highest frequency of occurrence and concentrations should be prioritized for further environmental monitoring studies, and specific toxicity thresholds should be defined. Few contaminants were found in fish, but the results challenge the widely use of prosulfocarb.
Fichier principal
Vignette du fichier
ENVPOL-D-21-04135_R1 final DB.pdf (902.18 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03401371 , version 1 (25-10-2021)

Identifiants

Citer

Sylvain Slaby, François Le Cor, Vincent Dufour, Lucile Auger, Laure Pasquini, et al.. Distribution of pesticides and some of their transformation products in a small lentic waterbody: Fish, water, and sediment contamination in an agricultural watershed. Environmental Pollution, 2022, 292, Part B, pp.118403. ⟨10.1016/j.envpol.2021.118403⟩. ⟨hal-03401371⟩
104 Consultations
160 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More