Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.scitotenv.2021.148350
Volltext Akzeptiertes Manuskript
Titel (primär) Pesticide-induced metabolic changes are amplified by food stress
Autor Shahid, N.; Rolle-Kampczyk, U.; Siddique, A. ORCID logo ; von Bergen, M.; Liess, M.
Quelle Science of the Total Environment
Erscheinungsjahr 2021
Band/Volume 792
Seite von art. 148350
Sprache englisch
Topic T9 Healthy Planet
Keywords Metabolic changes; Daphnia magna; Pyrethroid; Interaction; Food stress
Abstract In natural ecosystems, long-term detrimental effects of pesticides may occur at very low concentrations, below those considered safe by the governmental risk assessment. Mechanisms potentially responsible for this unexpected sensitivity include environmental stress-factors such as food deficiency. To understand this so called “effect-paradox”, we investigated how food stress interacts with insecticide-induced biochemical fingerprints. Therefore, we measured metabolomic perturbations in Daphnia magna following a 24 h exposure to esfenvalerate under high and low food conditions. In total, 160 metabolites covering the groups of amino acids, fatty acids, lipids, and sugars were analyzed. At 0.001 μg/L esfenvalerate – a factor of >200 below the acute lethal concentration (LC50) – the endogenous metabolome was significantly affected. Further, the effect under low food conditions was considerably stronger compared to high food conditions. Individual metabolites showed up to 7-fold stronger effects under low food conditions. In general, the metabolomic changes were largely dose-specific and increased over seven days after contamination. We conclude that the metabolic profiles are altered for at least seven days after a pulse exposure, and therefore might be a key process to understanding population level changes at ultra-low pesticide concentrations in the field.
dauerhafte UFZ-Verlinkung
Shahid, N., Rolle-Kampczyk, U., Siddique, A., von Bergen, M., Liess, M. (2021):
Pesticide-induced metabolic changes are amplified by food stress
Sci. Total Environ. 792 , art. 148350 10.1016/j.scitotenv.2021.148350