학술논문
Salinity causes widespread restriction of methane emissions from small inland waters.
Document Type
Academic Journal
Author
Soued C; Department of Biological Sciences, University of Lethbridge, Lethbridge, AB, Canada.; Bogard MJ; Department of Biological Sciences, University of Lethbridge, Lethbridge, AB, Canada. matthew.bogard@uleth.ca.; Finlay K; Department of Biology, University of Regina, Regina, SK, S4S 0A2, Canada.; Institute of Environmental Change and Society, University of Regina, S4S 0A2, Regina, SK, Canada.; Bortolotti LE; Institute for Wetland & Waterfowl Research, Ducks Unlimited Canada, PO Box 1160, R0C 2Z0, Stonewall, MB, Canada.; Leavitt PR; Institute of Environmental Change and Society, University of Regina, S4S 0A2, Regina, SK, Canada.; Limnology Laboratory, Department of Biology, University of Regina, Regina, SK, S4S 0A2, Canada.; Badiou P; Institute for Wetland & Waterfowl Research, Ducks Unlimited Canada, PO Box 1160, R0C 2Z0, Stonewall, MB, Canada.; Knox SH; Department of Geography, The University of British Columbia, Vancouver, BC, Canada.; Department of Geography, McGill University, Montreal, QC, Canada.; Jensen S; Department of Biology, University of Regina, Regina, SK, S4S 0A2, Canada.; Mueller P; Department of Biological Sciences, University of Lethbridge, Lethbridge, AB, Canada.; Lee SC; Department of Geography, The University of British Columbia, Vancouver, BC, Canada.; Department of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, Jena, Germany.; Ng D; Department of Geography, The University of British Columbia, Vancouver, BC, Canada.; Wissel B; Institute of Environmental Change and Society, University of Regina, S4S 0A2, Regina, SK, Canada.; LEHNA, Université Claude Bernard Lyon 1, 69622, Villeurbanne, Cedex, France.; Chan CN; Department of Biological Sciences, University of Lethbridge, Lethbridge, AB, Canada.; Page B; Institute for Wetland & Waterfowl Research, Ducks Unlimited Canada, PO Box 1160, R0C 2Z0, Stonewall, MB, Canada.; Kowal P; Institute for Wetland & Waterfowl Research, Ducks Unlimited Canada, PO Box 1160, R0C 2Z0, Stonewall, MB, Canada.
Source
Publisher: Nature Pub. Group Country of Publication: England NLM ID: 101528555 Publication Model: Electronic Cited Medium: Internet ISSN: 2041-1723 (Electronic) Linking ISSN: 20411723 NLM ISO Abbreviation: Nat Commun Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
Inland waters are one of the largest natural sources of methane (CH 4 ), a potent greenhouse gas, but emissions models and estimates were developed for solute-poor ecosystems and may not apply to salt-rich inland waters. Here we combine field surveys and eddy covariance measurements to show that salinity constrains microbial CH 4 cycling through complex mechanisms, restricting aquatic emissions from one of the largest global hardwater regions (the Canadian Prairies). Existing models overestimated CH 4 emissions from ponds and wetlands by up to several orders of magnitude, with discrepancies linked to salinity. While not significant for rivers and larger lakes, salinity interacted with organic matter availability to shape CH 4 patterns in small lentic habitats. We estimate that excluding salinity leads to overestimation of emissions from small Canadian Prairie waterbodies by at least 81% ( ~ 1 Tg yr -1 CO 2 equivalent), a quantity comparable to other major national emissions sources. Our findings are consistent with patterns in other hardwater landscapes, likely leading to an overestimation of global lentic CH 4 emissions. Widespread salinization of inland waters may impact CH 4 cycling and should be considered in future projections of aquatic emissions.
(© 2024. The Author(s).)
(© 2024. The Author(s).)