Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.envpol.2008.08.014 |
| Title (Primary) | Variability of pesticide exposure in a stream mesocosm system: macrophyte-dominated vs. non-vegetated sections |
| Author | Beketov, M.A.; Liess, M. |
| Source Titel | Environmental Pollution |
| Year | 2008 |
| Department | OEKOTOX |
| Volume | 156 |
| Issue | 3 |
| Page From | 1364 |
| Page To | 1367 |
| Language | 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. |
| Persistent UFZ Identifier | 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 |
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