Journal
ENVIRONMENTAL POLLUTION
Volume 171, Issue -, Pages 199-206Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.07.040
Keywords
Chloride; Surface water; Streams; Road salt; Freshwater mussels
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Warm season (May October) chloride concentrations were assessed in stream habitats of freshwater mussel species at risk in southern Ontario, Canada. Significant increases in concentrations were observed at 96% of 24 long-term (1975-2009) monitoring sites. Concentrations were described as a function of road density indicating an anthropogenic source of chloride. Linear regression showed that 36% of the variation of concentrations was explained by road salt use by the provincial transportation ministry. Results suggest that long-term road salt use and retention is contributing to a gradual increase in baseline chloride concentrations in at risk mussel habitats. Exposure of sensitive mussel larvae (glochidia) to increasing chloride concentrations may affect recruitment to at risk mussel populations. (C) 2012 Elsevier Ltd. All rights reserved.
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