Canadian Forest Service Publications

Comparisons of watershed sulfur budgets in southeast Canada and northeast US: new approaches and implications. 2011. Mitchell, M.J.; Lovet, G.; Bailey, S.; Beall, F.; Burns, D.; Burso, D.; Clair, T.A.; Courchesne,F.; Duchesne,L.;Eimers, C.; Fernandez, I.; Houle, D.; Jeffries, D. S.; Likens, G.E.; Moran, M.D.; Rogers, C.; Schwede, D.; Shanley,J.; Weathers, K.C.; Vet,R. Biogeochemistry 103:181-207.

Year: 2011

Issued by: Great Lakes Forestry Centre

Catalog ID: 33063

Language: English

Availability: PDF (request by e-mail)

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Most of eastern North America receives elevated levels of atmospheric deposition of sulfur (S) that result from anthropogenic S02 emissions from fossil fuel combustion. Atmospheric S deposi tion has acidified sensitive terrestrial and aquatic ecosystems in this region; however, deposition has been declining since the 1970s, resulting in some recovery in previously acidified aquatic ecosystems. Accurate watershed S mass balances help to evaluate the extent to which atmospheric S deposition is retained within ecosystems, and whether internal cycling sources and biogeochemical processes may be affecting the rate of recovery from decreasing S atmospheric loads. This study evaluated S mass balances for 15 sites with watersheds in southeastern Canada and northeastern US for the period 1985 to 2002. These 15 sites included nine in Canada (Turkey Lakes, ON; Harp Lake, ON; Plastic Lake, ON; Hermine, QC; Lake Laflamme, QC; Lake Clair, QC; Lake Tirasse, QC; Mersey, NS; Moosepit, NS)