期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 579, 期 -, 页码 1193-1202出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2016.11.102
关键词
Macrophytes; Plant accumulation; Mitigation; Clothianidin; Thiamethoxam; Bioremediation
资金
- Department of Fisheries and Oceans (DFO) [NCAG 340982]
- NSERC [STPG 430138-12]
Neonicotinoid insecticides are frequently detected in wetlands during the early to mid-growing period of the Canadian Prairie cropping season. These detections also overlap with the growth of macrophytes that commonly surround agricultural wetlands which we hypothesized may reduce neonicotinoid transport and retention in wetlands. We sampled 20 agricultural wetlands and 11 macrophyte species in central Saskatchewan, Canada, over eight weeks to investigate whether macrophytes were capable of reducing movement of neonicotinoids from cultivated fields and/or reducing concentrations in surface water by accumulating insecticide residues into their tissues. Study wetlands were surrounded by clothianidin-treated canola and selected based on the presence (n = 10) or absence (n = 10) of a zonal plant community. Neonicotinoids were positively detected in 43% of wetland plants, and quantified in 8% of all plant tissues sampled. Three plant species showed high rates of detection: 78% Equisetum arvense (clothianidin, range:
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