Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.envpol.2008.08.014
Titel (primär) Variability of pesticide exposure in a stream mesocosm system: macrophyte-dominated vs. non-vegetated sections
Autor Beketov, M.A.; Liess, M.
Quelle Environmental Pollution
Erscheinungsjahr 2008
Department OEKOTOX
Band/Volume 156
Heft 3
Seite von 1364
Seite bis 1367
Sprache englisch
Keywords Pesticides; Pulse exposure; Streams; Macrophytes; Risk assessment
Abstract For flowing water bodies no information is available about patterns of contaminant distribution in flowing water compared to macrophyte-dominated structures. The aim of the study was to examine temporal dynamic and spatial cross-channel variability of pulse exposure of the insecticide thiacloprid in outdoor stream mesocosms. Two distinct cross-channel sections have been considered: macrophyte-dominated littoral and non-vegetated midstream. Median disappearance time ranged from 17 to 43 h (water phase, midstream). We showed that during the exposure pulse (10 h) thiacloprid concentrations in the macrophyte-dominated section were 20-60% lower than those in the non-vegetated section. This suggests that spatial variability in contaminant concentrations, particularly in streams containing macrophytes, should be taken into account to enable a more realistic assessment of (i) exposure and associated effects and (ii) mass transport of pesticides and other chemicals into river systems (e.g. losses with surface runoff).Spatial cross-channel variability of contaminant concentrations is noteworthy and important.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=790
Beketov, M.A., Liess, M. (2008):
Variability of pesticide exposure in a stream mesocosm system: macrophyte-dominated vs. non-vegetated sections
Environ. Pollut. 156 (3), 1364 - 1367 10.1016/j.envpol.2008.08.014