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Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation

Ping Yang, Kam Tang Orcid Logo, Hong Yang, Chuan Tong, Linhai Zhang, Derrick Y.F. Lai, Yan Hong, Lishan Tan, Wanyi Zhu, Chen Tang

Journal of Hydrology, Volume: 617, Start page: 128876

Swansea University Author: Kam Tang Orcid Logo

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DOI (Published version): 10.1016/j.jhydrol.2022.128876

Abstract

The increasing number of small-hold aquaculture ponds for food production globally has raised concerns of their emission of greenhouse gases (GHGs) such as methane (CH4) and nitrous oxide (N2O). Aeration is commonly applied to improve oxygen supply for the farmed animals, but it could have opposite...

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Published in: Journal of Hydrology
ISSN: 0022-1694
Published: Elsevier BV 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa62030
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Aeration is commonly applied to improve oxygen supply for the farmed animals, but it could have opposite effects on GHG emission: It may inhibit anaerobic microbial processes that produce GHGs; it may also increase water-to-air GHG exchange via physical agitation. To resolve the overall effect of aeration on GHG emissions, this study analyzed and compared the monthly CH4 and N2O emissions from earthen shrimp ponds with and without aeration, in the farming period for two consecutive years, in an estuary in subtropical southeastern China. CH4 flux was mainly influenced by water temperature and dissolved oxygen, and it was significantly higher in non-aerated pond (7.6 mg m-2 h-1) than in aerated ponds (4.5 mg m-2 h-1), with ebullition accounting for &gt;90% of the emission. Conversely, non-aerated pond had ca. 50% lower N2O flux than aerated ponds, and dissolved nitrate was the main driving factor. The combined CO2-equivalent emission in aerated ponds (avg. 10,829 kg CO2-eq ha-1 yr-1) was substantially lower than that in non-aerated pond (avg. 17,627 kg CO2-eq ha-1 yr-1). While aeration may increase diffusive flux of GHGs via physical agitation, it remains a simple and effective management practice to decrease the overall climate impact of aquaculture ponds.</abstract><type>Journal Article</type><journal>Journal of Hydrology</journal><volume>617</volume><journalNumber/><paginationStart>128876</paginationStart><paginationEnd/><publisher>Elsevier BV</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>0022-1694</issnPrint><issnElectronic/><keywords>Artificial aerationl; Greenhouse gases (GHGs) emission; Sustained-flux global warming potential (SGWP); Climate mitigation; Aquaculture pond</keywords><publishedDay>1</publishedDay><publishedMonth>2</publishedMonth><publishedYear>2023</publishedYear><publishedDate>2023-02-01</publishedDate><doi>10.1016/j.jhydrol.2022.128876</doi><url/><notes/><college>COLLEGE NANME</college><department>Biosciences</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SBI</DepartmentCode><institution>Swansea University</institution><apcterm>Not Required</apcterm><funders>This research was funded by the National Natural Science Foundation of China (NNSFC) (No. 41801070, 41671088), the National Natural Science Foundation of Fujian Province (NNSFF) (No. 2018J01737, 2020J01136), and the Minjiang Scholar Programme.</funders><projectreference/><lastEdited>2022-12-28T14:55:42.7787617</lastEdited><Created>2022-11-24T11:29:24.1669428</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Biosciences</level></path><authors><author><firstname>Ping</firstname><surname>Yang</surname><order>1</order></author><author><firstname>Kam</firstname><surname>Tang</surname><orcid>0000-0001-9427-9564</orcid><order>2</order></author><author><firstname>Hong</firstname><surname>Yang</surname><order>3</order></author><author><firstname>Chuan</firstname><surname>Tong</surname><order>4</order></author><author><firstname>Linhai</firstname><surname>Zhang</surname><order>5</order></author><author><firstname>Derrick Y.F.</firstname><surname>Lai</surname><order>6</order></author><author><firstname>Yan</firstname><surname>Hong</surname><order>7</order></author><author><firstname>Lishan</firstname><surname>Tan</surname><order>8</order></author><author><firstname>Wanyi</firstname><surname>Zhu</surname><order>9</order></author><author><firstname>Chen</firstname><surname>Tang</surname><order>10</order></author></authors><documents><document><filename>Under embargo</filename><originalFilename>Under embargo</originalFilename><uploaded>2022-11-24T11:31:53.6241206</uploaded><type>Output</type><contentLength>2078929</contentLength><contentType>application/pdf</contentType><version>Accepted Manuscript</version><cronfaStatus>true</cronfaStatus><embargoDate>2023-12-09T00:00:00.0000000</embargoDate><documentNotes>&#xA9;2022 All rights reserved. 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spelling 2022-12-28T14:55:42.7787617 v2 62030 2022-11-24 Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation 69af43a3b9da24aef65c5d3a44956fe3 0000-0001-9427-9564 Kam Tang Kam Tang true false 2022-11-24 SBI The increasing number of small-hold aquaculture ponds for food production globally has raised concerns of their emission of greenhouse gases (GHGs) such as methane (CH4) and nitrous oxide (N2O). Aeration is commonly applied to improve oxygen supply for the farmed animals, but it could have opposite effects on GHG emission: It may inhibit anaerobic microbial processes that produce GHGs; it may also increase water-to-air GHG exchange via physical agitation. To resolve the overall effect of aeration on GHG emissions, this study analyzed and compared the monthly CH4 and N2O emissions from earthen shrimp ponds with and without aeration, in the farming period for two consecutive years, in an estuary in subtropical southeastern China. CH4 flux was mainly influenced by water temperature and dissolved oxygen, and it was significantly higher in non-aerated pond (7.6 mg m-2 h-1) than in aerated ponds (4.5 mg m-2 h-1), with ebullition accounting for >90% of the emission. Conversely, non-aerated pond had ca. 50% lower N2O flux than aerated ponds, and dissolved nitrate was the main driving factor. The combined CO2-equivalent emission in aerated ponds (avg. 10,829 kg CO2-eq ha-1 yr-1) was substantially lower than that in non-aerated pond (avg. 17,627 kg CO2-eq ha-1 yr-1). While aeration may increase diffusive flux of GHGs via physical agitation, it remains a simple and effective management practice to decrease the overall climate impact of aquaculture ponds. Journal Article Journal of Hydrology 617 128876 Elsevier BV 0022-1694 Artificial aerationl; Greenhouse gases (GHGs) emission; Sustained-flux global warming potential (SGWP); Climate mitigation; Aquaculture pond 1 2 2023 2023-02-01 10.1016/j.jhydrol.2022.128876 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University Not Required This research was funded by the National Natural Science Foundation of China (NNSFC) (No. 41801070, 41671088), the National Natural Science Foundation of Fujian Province (NNSFF) (No. 2018J01737, 2020J01136), and the Minjiang Scholar Programme. 2022-12-28T14:55:42.7787617 2022-11-24T11:29:24.1669428 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Ping Yang 1 Kam Tang 0000-0001-9427-9564 2 Hong Yang 3 Chuan Tong 4 Linhai Zhang 5 Derrick Y.F. Lai 6 Yan Hong 7 Lishan Tan 8 Wanyi Zhu 9 Chen Tang 10 Under embargo Under embargo 2022-11-24T11:31:53.6241206 Output 2078929 application/pdf Accepted Manuscript true 2023-12-09T00:00:00.0000000 ©2022 All rights reserved. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND) true eng https://creativecommons.org/licenses/by-nc-nd/4.0/
title Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation
spellingShingle Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation
Kam Tang
title_short Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation
title_full Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation
title_fullStr Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation
title_full_unstemmed Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation
title_sort Contrasting effects of aeration on methane (CH4) and nitrous oxide (N2O) emissions from subtropical aquaculture ponds and implications for global warming mitigation
author_id_str_mv 69af43a3b9da24aef65c5d3a44956fe3
author_id_fullname_str_mv 69af43a3b9da24aef65c5d3a44956fe3_***_Kam Tang
author Kam Tang
author2 Ping Yang
Kam Tang
Hong Yang
Chuan Tong
Linhai Zhang
Derrick Y.F. Lai
Yan Hong
Lishan Tan
Wanyi Zhu
Chen Tang
format Journal article
container_title Journal of Hydrology
container_volume 617
container_start_page 128876
publishDate 2023
institution Swansea University
issn 0022-1694
doi_str_mv 10.1016/j.jhydrol.2022.128876
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 0
active_str 0
description The increasing number of small-hold aquaculture ponds for food production globally has raised concerns of their emission of greenhouse gases (GHGs) such as methane (CH4) and nitrous oxide (N2O). Aeration is commonly applied to improve oxygen supply for the farmed animals, but it could have opposite effects on GHG emission: It may inhibit anaerobic microbial processes that produce GHGs; it may also increase water-to-air GHG exchange via physical agitation. To resolve the overall effect of aeration on GHG emissions, this study analyzed and compared the monthly CH4 and N2O emissions from earthen shrimp ponds with and without aeration, in the farming period for two consecutive years, in an estuary in subtropical southeastern China. CH4 flux was mainly influenced by water temperature and dissolved oxygen, and it was significantly higher in non-aerated pond (7.6 mg m-2 h-1) than in aerated ponds (4.5 mg m-2 h-1), with ebullition accounting for >90% of the emission. Conversely, non-aerated pond had ca. 50% lower N2O flux than aerated ponds, and dissolved nitrate was the main driving factor. The combined CO2-equivalent emission in aerated ponds (avg. 10,829 kg CO2-eq ha-1 yr-1) was substantially lower than that in non-aerated pond (avg. 17,627 kg CO2-eq ha-1 yr-1). While aeration may increase diffusive flux of GHGs via physical agitation, it remains a simple and effective management practice to decrease the overall climate impact of aquaculture ponds.
published_date 2023-02-01T04:21:19Z
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score 11.017797

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