Ecotoxicology and Environmental Safety, Journal Year: 2025, Volume and Issue: 295, P. 118143 - 118143

Published: April 1, 2025

Contaminant monitoring in agroecosystems is increasingly revealing overlooked molecules, particularly within complex pesticide mixtures. This study assessed the effectiveness of chemical and ecotoxicological methods for evaluating contamination biological responses Gammarus roeseli exposed to pesticides transformation products (TPs) lentic small water bodies (LSWBs) near agricultural zones. We examined 7 LSWBs, finding variable levels shaped by watershed composition differences. Analysis 136 compounds identified key TPs, including chlorothalonil R471811, metazachlor ESA, OXA, which collectively represented 86.2 % total quantified contaminants. These results underscore persistence both current banned ponds studied. While G. showed favorable survival rates, significant reductions locomotion ventilation were observed at heavily contaminated sites, with biochemical analyses suggesting neurotoxic effects activation detoxification mechanisms response Multivariate revealed site-specific variations, highlighting interactions between environmental conditions. Biomarker gammarids served as sensitive indicators residual toxicity frequent associations historical or applications. situ caging approach across a gradient demonstrates strong potential biomonitoring assessments agroecosystems. Extending exposure durations more could further enhance risk evaluation, thereby improving accuracy headwater aquatic ecosystems. By integrating conditions, profiles, responses, this provides valuable insights into influence practices on LSWBs underscores critical need incorporate TPs future assessment frameworks.

Language: Английский