Abstract
An understanding of the main controls on carbon accumulation in naturally saline peatlands can be useful for furthering peatland reclamation in the Athabasca Oil Sands Region where salinization complicates construction of sustainable peatland ecosystems. As such, the long-term apparent rate of carbon accumulation (LARCA) within a naturally saline fen situated near Fort McMurray, Alberta was studied using two peat cores. Changes in LARCA in less saline part of the fen coincide with water table fluctuations and seem not to be affected by low salinity (soil EC <5 mS cm−1). The highest LARCA values were associated with wet conditions; however, prolonged inundations coupled with high salinity (soil EC >10 mS cm−1) appear to have had a negative effect on LARCA. In the more saline part, salinity seem to have a notable effect on LARCA – hydrology links. Mean LARCA of the site (19.7 g−2 yr.−1) is lower than in western continental fens. The northern less saline part of the fen (soil EC <5 mS cm−1) has LARCA of 29.67 g−2 yr.−1 that is close to LARCA in continental fens, but LARCA in the southern part (soil EC >10 mS cm−1) is considerably lower (9.79 g−2 yr.−1).
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Acknowledgments
We wish to thank Meaghan Quanz for help with field work; Volodymyr Sivkov, Tristan Gingras-Hill, and Adam Green for help with core collection; Carley Crann (A.E. Lalonde AMS Facility, University of Ottawa) for radiocarbon dating. We thank the editors of Wetlands and anonymous reviewers for comments on an early draft of this work. Funding provided by the Natural Science and Engineering Research Council (NSERC) of Canada, Collaborative Research and Development Program, co-funded by Suncor Energy Inc., Imperial Oil Resources Limited and Shell Canada Energy (Price, Petrone); NSERC Discovery Grant Program (Petrone); NSERC Northern Supplement (Petrone); and Northern Studies Training Program (Volik).
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Volik, O., Petrone, R.M., Wells, C.M. et al. Impact of Salinity, Hydrology and Vegetation on Long-Term Carbon Accumulation in a Saline Boreal Peatland and its Implication for Peatland Reclamation in the Athabasca Oil Sands Region. Wetlands 38, 373–382 (2018). https://doi.org/10.1007/s13157-017-0974-5
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DOI: https://doi.org/10.1007/s13157-017-0974-5