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Small artificial waterbodies are widespread and persistent emitters of methane and carbon dioxide

Peacock, Michael and Audet, J. and Bastviken, D. and Cook, S. and Evans, Christopher and Grinham, A. and Holgerson, M. A. and Högbom, Lars and Pickard, A.E. and Zielinski, Piotr and Futter, Martyn (2021). Small artificial waterbodies are widespread and persistent emitters of methane and carbon dioxide. Global Change Biology. 27 , 5109-5123
[Research article]

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Abstract

Inland waters play an active role in the global carbon cycle and emit large volumes of the greenhouse gases (GHGs), methane (CH4) and carbon dioxide (CO2). A considerable body of research has improved emissions estimates from lakes, reservoirs and rivers but recent attention has been drawn to the importance of small, artificial waterbodies as poorly quantified but potentially important emission hotspots. Of particular interest are emissions from drainage ditches and constructed ponds. These waterbody types are prevalent in many landscapes and their cumulative surface areas can be substantial. Furthermore, GHG emissions from constructed waterbodies are anthropogenic in origin and form part of national emissions reporting, whereas emissions from natural waterbodies do not (according to Intergovernmental Panel on Climate Change guidelines). Here, we present GHG data from two complementary studies covering a range of land uses. In the first, we measured emissions from nine ponds and seven ditches over a full year. Annual emissions varied considerably: 0.1-44.3 g CH4 m(-2) year(-1) and -36-4421 g CO2 m(-2) year(-1). In the second, we measured GHG concentrations in 96 ponds and 64 ditches across seven countries, covering subtropical, temperate and sub-arctic biomes. When CH4 emissions were converted to CO2 equivalents, 93% of waterbodies were GHG sources. In both studies, GHGs were positively related to nutrient status (C, N, P), and pond GHG concentrations were highest in smallest waterbodies. Ditch and pond emissions were larger per unit area when compared to equivalent natural systems (streams, natural ponds). We show that GHG emissions from natural systems should not be used as proxies for those from artificial waterbodies, and that artificial waterbodies have the potential to make a substantial but largely unquantified contribution to emissions from the Agriculture, Forestry and Other Land Use sector, and the global carbon cycle.

Authors/Creators:Peacock, Michael and Audet, J. and Bastviken, D. and Cook, S. and Evans, Christopher and Grinham, A. and Holgerson, M. A. and Högbom, Lars and Pickard, A.E. and Zielinski, Piotr and Futter, Martyn
Title:Small artificial waterbodies are widespread and persistent emitters of methane and carbon dioxide
Series Name/Journal:Global Change Biology
Year of publishing :2021
Volume:27
Page range:5109-5123
Number of Pages:15
Publisher:WILEY
ISSN:1354-1013
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 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
Keywords:ditch, drainage, greenhouse gas, inland waters, pond, stream
URN:NBN:urn:nbn:se:slu:epsilon-p-112854
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112854
Additional ID:
Type of IDID
DOI10.1111/gcb.15762
Web of Science (WoS)000671619600001
ID Code:25990
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:29 Oct 2021 13:25
Metadata Last Modified:29 Oct 2021 13:31

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