Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.hazadv.2026.101293 |
Lizenz  |
|
| Titel (primär) | Partitioning and ecotoxicological effects of pyrethroids in streams – Dissolved fraction mediates invertebrate toxicity |
| Autor | Gröning, J.; Böhme, A.; Römerscheid, M.; Schwarz, B.; Ulrich, N.; Liess, M. |
| Quelle | Journal of Hazardous Materials Advances |
| Erscheinungsjahr | 2026 |
| Department | ETOX; EXPO |
| Seite von | art. 101293 |
| Sprache | englisch |
| Topic | T9 Healthy Planet |
| Supplements | Supplement 1 |
| Keywords | Aquatic ecosystems; Equilibrium partitioning; Water; Suspended matter; Sediment; Bioavailability |
| Abstract | Pyrethroid
insecticides are highly toxic to aquatic invertebrates but, due to
their low application rates, occur in the aquatic environment only at
trace concentrations. Being strongly hydrophobic, they largely bind to
suspended matter and sediments, leaving only a minor dissolved fraction
that is analytically challenging to detect. Consequently, current
assessments of pyrethroid exposure in streams often rely on total water
or sediment concentrations, although it remains unclear whether these
measures capture actual ecotoxicological risks. Here, we investigated
the partitioning of eight pyrethroids across water, suspended matter,
and sediment in 14 small agricultural streams in Germany, and assessed
the ecotoxicological significance of these fractions by linking exposure
to the SPEARpesticides bioindicator. We found that dissolved
concentrations in water best explained the observed effects on aquatic
invertebrate communities at the ecosystem level (R² = 0.81, p <
0.001, AICc = –15.1), whereas including the particulate fraction led to
an overestimation of toxicity. Although pyrethroids occurred most
frequently and at the highest concentrations bound to particles, the
dissolved fraction still accounted for 33% of total concentrations in
water, reached effect-driving levels (log TU > –3), and dominated
toxicity at half of the sites. Notably, water-phase concentrations were
not in equilibrium with suspended matter or sediment, and their
distribution could not be predicted from particle quantity or organic
carbon content. Our findings emphasize the need to include pyrethroids
in routine monitoring, with a focus on dissolved concentrations in risk
assessment, to more reliably capture pyrethroid-related risks in aquatic
ecosystems. |
| Gröning, J., Böhme, A., Römerscheid, M., Schwarz, B., Ulrich, N., Liess, M. (2026): Partitioning and ecotoxicological effects of pyrethroids in streams – Dissolved fraction mediates invertebrate toxicity J. Hazard. Mater. Adv. , art. 101293 10.1016/j.hazadv.2026.101293 |
|