Title: Supporting information: Controls on methylmercury concentrations in lakes and streams of peatland-rich catchments along a 1700 km permafrost gradient
Citation: Thompson, L.M., Kuhn, M.A., Winder, J.C., Braga, L.P.P., Hutchins, R.H.S., Tanentzap, A.J., St. Louis, V.L. and Olefeldt, D. (2023), Supporting information: Controls on methylmercury concentrations in lakes and streams of peatland-rich catchments along a 1700 km permafrost gradient. University of Alberta Education & Research Archive. https://doi.org/10.7939/r3-z2w3-p617
Study Site: Interior Plains of northwestern Canada
Purpose: Permafrost thaw may increase the production of neurotoxic methylmercury (MeHg) in northern peatlands, but the downstream delivery of MeHg is uncertain.
Abstract: We quantified total mercury (THg) and MeHg concentrations in lakes and streams along a 1700 km permafrost transect in boreal western Canada to determine the influence of regional permafrost extent compared to local lake and catchment characteristics. In lakes, we assessed sediment microbial communities and modeled potential rates of water column photodemethylation (PD).
Supplemental Information Summary: The study encompassed lands of the Dehcho Dene, Gwich'in, Inuvialuit, Dene Tha', Woodland Cree, Big Stone Cree, and Métis people.
Research:
Further Info: Thompson, L.M., Kuhn, M.A., Winder, J.C., Braga, L.P.P., Hutchins, R.H.S., Tanentzap, A.J., St. Louis, V.L. and Olefeldt, D. (2023), Controls on methylmercury concentrations in lakes and streams of peatland-rich catchments along a 1700 km permafrost gradient. Limnol Oceanogr, 68: 583-597. https://doi.org/10.1002/lno.12296
Status: Complete
Keywords:
hydrology,
methane,
Permafrost,
metals,
water quality,
Geographical coordinates: North: 68.9, South: 55.8 East: -134.40 West: -115.11
Bounding Temporal Extent: Start Date: 2019-01-01, End
Date: 2019-12-31
