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Phosphorus Regulation of Methane Oxidation in Water From Ice-Covered Lakes

Sawakuchi, Henrique O. and Martin, Gaëtan and Peura, Sari and Bertilsson, Stefan and Karlsson, Jan and Bastviken, David (2021). Phosphorus Regulation of Methane Oxidation in Water From Ice-Covered Lakes. Journal of Geophysical Research: Biogeosciences. 126 , e2020JG006190
[Research article]

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Abstract

Winter methane (CH4) accumulation in seasonally ice-covered lakes can contribute to large episodic emissions to the atmosphere during spring ice melt. Biological methane oxidation can significantly mitigate such CH4 emissions, but despite favorable CH4 and O-2 concentrations, CH4 oxidation appears constrained in some lakes for unknown reasons. Here we experimentally test the hypothesis that phosphorus (P) availability is limiting CH4 oxidation, resulting in differences in ice-out emissions among lakes. We observed a positive relationship between potential CH4 oxidation and P concentration across 12 studied lakes and found an increase in CH4 oxidation in response to P amendment, without any parallel change in the methanotrophic community composition. Hence, while an increase in sedimentary CH4 production and ebullitive emissions may happen with eutrophication, our study indicates that the increase in P associated with eutrophication may also enhance CH4 oxidation. The increase in CH4 oxidation may hence play an important role in nutrient-rich ice-covered lakes where bubbles trapped under the ice may to a greater extent be oxidized, reducing the ice-out emissions of CH4. This may be an important factor regulating CH4 emissions from high latitude lakes.

Authors/Creators:Sawakuchi, Henrique O. and Martin, Gaëtan and Peura, Sari and Bertilsson, Stefan and Karlsson, Jan and Bastviken, David
Title:Phosphorus Regulation of Methane Oxidation in Water From Ice-Covered Lakes
Series Name/Journal:Journal of Geophysical Research: Biogeosciences
Year of publishing :2021
Volume:126
Article number:e2020JG006190
Number of Pages:13
Publisher:AMER GEOPHYSICAL UNION
ISSN:2169-8953
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:CH4 oxidation, phosphorus, methanotrophs, boreal lakes, ice-out CH4 emissions
URN:NBN:urn:nbn:se:slu:epsilon-p-113990
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113990
Additional ID:
Type of IDID
DOI10.1029/2020JG006190
Web of Science (WoS)000703067000032
ID Code:25897
Faculty:S - Faculty of Forest Sciences
NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology

(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:21 Oct 2021 12:25
Metadata Last Modified:21 Oct 2021 12:31

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