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Sulfonylurea herbicides in an agricultural catchment basin and its adjacent wetland in the St. Lawrence River basin.
Sci Total Environ. 2014 May 01; 479-480:1-10.ST

Abstract

The use of sulfonylurea herbicides (SU) has increased greater than 100 times over the past 30 years in both Europe and North America. Applied at low rates, their presence, persistence and potential impacts on aquatic ecosystems remain poorly studied. During late-spring to early fall in 2009-2011, concentrations of 9 SU were assessed in two agricultural streams and their receiving wetland, an enlargement of the St. Lawrence River (Canada). Six SU in concentrations >LOQ (10 ng L(-1)) were detected in 10% or less of surface water samples. Rimsulfuron was detected each year, sulfosulfuron and nicosulfuron in two years and the others in one year only, suggesting that application of specific herbicides varied locally between years. Detection frequency and concentrations of SU were not significantly associated with total precipitation which occurred 1 to 5d before sampling. Concentrations and fate of SU differed among sites due to differences in stream dynamics and water quality characteristics. The persistence of SU in catchment basin streams reflected the dissipation effects associated with stream discharge. Maximum concentrations of some SU (223 and 148 ng L(-1)) were occasionally above the baseline level (100 ng L(-1)) for aquatic plant toxicity, implying potential toxic stress to flora in the streams. Substantially lower concentrations (max 55 ng L(-1)) of SU were noted at the downstream wetland site, likely as a result from dilution and mixing with St. Lawrence River water, and represent less toxicological risk to the wetland flora. Sporadic occurrence of SU at low concentrations in air and rain samples indicated that atmospheric deposition was not an important source of herbicides to the study area.

Authors+Show Affiliations

Environment Canada, Watershed Hydrology and Ecology Research Division, Centre Saint-Laurent, 105 McGill St., Montreal, QC H2Y 2E7, Canada.Environment Canada, Watershed Hydrology and Ecology Research Division, Centre Saint-Laurent, 105 McGill St., Montreal, QC H2Y 2E7, Canada.Agriculture and Agri-Food Canada, Science and Technology Branch, Saskatoon, SK S7N 0X2, Canada.Environment Canada, Watershed Hydrology and Ecology Research Division, Centre Saint-Laurent, 105 McGill St., Montreal, QC H2Y 2E7, Canada.Environment Canada, Watershed Hydrology and Ecology Research Division, Centre Saint-Laurent, 105 McGill St., Montreal, QC H2Y 2E7, Canada.Environment Canada, Watershed Hydrology and Ecology Research Division, Centre Saint-Laurent, 105 McGill St., Montreal, QC H2Y 2E7, Canada.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24534695

Citation

de Lafontaine, Yves, et al. "Sulfonylurea Herbicides in an Agricultural Catchment Basin and Its Adjacent Wetland in the St. Lawrence River Basin." The Science of the Total Environment, vol. 479-480, 2014, pp. 1-10.
de Lafontaine Y, Beauvais C, Cessna AJ, et al. Sulfonylurea herbicides in an agricultural catchment basin and its adjacent wetland in the St. Lawrence River basin. Sci Total Environ. 2014;479-480:1-10.
de Lafontaine, Y., Beauvais, C., Cessna, A. J., Gagnon, P., Hudon, C., & Poissant, L. (2014). Sulfonylurea herbicides in an agricultural catchment basin and its adjacent wetland in the St. Lawrence River basin. The Science of the Total Environment, 479-480, 1-10. https://doi.org/10.1016/j.scitotenv.2014.01.094
de Lafontaine Y, et al. Sulfonylurea Herbicides in an Agricultural Catchment Basin and Its Adjacent Wetland in the St. Lawrence River Basin. Sci Total Environ. 2014 May 1;479-480:1-10. PubMed PMID: 24534695.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sulfonylurea herbicides in an agricultural catchment basin and its adjacent wetland in the St. Lawrence River basin. AU - de Lafontaine,Yves, AU - Beauvais,Conrad, AU - Cessna,Allan J, AU - Gagnon,Pierre, AU - Hudon,Christiane, AU - Poissant,Laurier, Y1 - 2014/02/15/ PY - 2013/12/12/received PY - 2014/01/26/revised PY - 2014/01/27/accepted PY - 2014/2/19/entrez PY - 2014/2/19/pubmed PY - 2014/9/26/medline KW - Discharge KW - Precipitation KW - Sulfonylurea herbicides KW - Surface waters KW - Wetland SP - 1 EP - 10 JF - The Science of the total environment JO - Sci Total Environ VL - 479-480 N2 - The use of sulfonylurea herbicides (SU) has increased greater than 100 times over the past 30 years in both Europe and North America. Applied at low rates, their presence, persistence and potential impacts on aquatic ecosystems remain poorly studied. During late-spring to early fall in 2009-2011, concentrations of 9 SU were assessed in two agricultural streams and their receiving wetland, an enlargement of the St. Lawrence River (Canada). Six SU in concentrations >LOQ (10 ng L(-1)) were detected in 10% or less of surface water samples. Rimsulfuron was detected each year, sulfosulfuron and nicosulfuron in two years and the others in one year only, suggesting that application of specific herbicides varied locally between years. Detection frequency and concentrations of SU were not significantly associated with total precipitation which occurred 1 to 5d before sampling. Concentrations and fate of SU differed among sites due to differences in stream dynamics and water quality characteristics. The persistence of SU in catchment basin streams reflected the dissipation effects associated with stream discharge. Maximum concentrations of some SU (223 and 148 ng L(-1)) were occasionally above the baseline level (100 ng L(-1)) for aquatic plant toxicity, implying potential toxic stress to flora in the streams. Substantially lower concentrations (max 55 ng L(-1)) of SU were noted at the downstream wetland site, likely as a result from dilution and mixing with St. Lawrence River water, and represent less toxicological risk to the wetland flora. Sporadic occurrence of SU at low concentrations in air and rain samples indicated that atmospheric deposition was not an important source of herbicides to the study area. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/24534695/Sulfonylurea_herbicides_in_an_agricultural_catchment_basin_and_its_adjacent_wetland_in_the_St__Lawrence_River_basin_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(14)00122-3 DB - PRIME DP - Unbound Medicine ER -