Journal
ENVIRONMENTAL POLLUTION
Volume 158, Issue 5, Pages 1825-1833Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2009.11.008
Keywords
Daphnia; Biopesticide; Salinity; Temperature; Stressor; In situ microcosms
Categories
Funding
- French Ministry for Ecology, Sustainable Development
Ask authors/readers for more resources
The present study was undertaken to assess the impact of a candidate mosquito larvicide, spinosad (8, 17 and 33 mu g L-1) on a field population of Daphnia magna under natural variations of water temperature and salinity, using Bti (0.16 and 0.50 mu L L-1) as the reference larvicide. Microcosms (125 L) were placed in a shallow temporary marsh where D. magna was naturally present. The peak of salinity observed during the 21-day observation period may have been partly responsible for the decrease of daphnid population density in all the microcosms. It is also probably responsible for the absence of recovery in the microcosms treated with spinosad which caused a sharp decrease of D. magna abundance within the first two days following treatment whereas Bti had no effect. These results suggest that it may be difficult for a field population of daphnids to cope simultaneously with natural (water salinity and temperature) and anthropogenic (larvicides) stressors. (C) 2009 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available