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Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China
Agriculture, Ecosystems and Environment, Volume: 335, Start page: 107995
Swansea University Author:
Kam Tang
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©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)
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DOI (Published version): 10.1016/j.agee.2022.107995
Abstract
Small-hold aquaculture ponds are widespread in China, but their carbon greenhouse gas emissions are poorly quantified. In this study, we used a carbon budget approach to assess the climate footprint of three earthen aquaculture ponds in southeastern China with the whiteleg shrimp (Litopenaeus vannam...
Published in: | Agriculture, Ecosystems and Environment |
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ISSN: | 0167-8809 |
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Elsevier BV
2022
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URI: | https://cronfa.swan.ac.uk/Record/cronfa59907 |
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The main carbon inputs to the ponds were planktonic primary production (58.5–61.8%), followed by commercial feeds (31.9-35.3%), while the major carbon outputs occurred through planktonic respiration (44.0–53.6%) and sedimentation (18.0–21.7%). Water-to-air emissions of carbon greenhouse gases (CO2 and CH4) represented only a small fraction of the carbon flow (0.8–1.6%), with a combined CO2-equivalent emission of 528.4±193.3 mg CO2-eq m−2 h−1 based on GWP20. We also observed significant spatio-temporal variation in carbon greenhouse gases among the three ponds, which could be attributed to the variation in Chl-a and carbon substrate supply. Nevertheless, the magnitude of CH4 emission from these ponds was still higher than some other agro-ecosystems. Moreover, we found that only 21% of the excess organic carbon was converted to shrimp biomass, while another 20% ended up in the sediment. 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v2 59907 2022-04-26 Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China 69af43a3b9da24aef65c5d3a44956fe3 0000-0001-9427-9564 Kam Tang Kam Tang true false 2022-04-26 BGPS Small-hold aquaculture ponds are widespread in China, but their carbon greenhouse gas emissions are poorly quantified. In this study, we used a carbon budget approach to assess the climate footprint of three earthen aquaculture ponds in southeastern China with the whiteleg shrimp (Litopenaeus vannamei) during the farming period. The main carbon inputs to the ponds were planktonic primary production (58.5–61.8%), followed by commercial feeds (31.9-35.3%), while the major carbon outputs occurred through planktonic respiration (44.0–53.6%) and sedimentation (18.0–21.7%). Water-to-air emissions of carbon greenhouse gases (CO2 and CH4) represented only a small fraction of the carbon flow (0.8–1.6%), with a combined CO2-equivalent emission of 528.4±193.3 mg CO2-eq m−2 h−1 based on GWP20. We also observed significant spatio-temporal variation in carbon greenhouse gases among the three ponds, which could be attributed to the variation in Chl-a and carbon substrate supply. Nevertheless, the magnitude of CH4 emission from these ponds was still higher than some other agro-ecosystems. Moreover, we found that only 21% of the excess organic carbon was converted to shrimp biomass, while another 20% ended up in the sediment. Our findings suggested that lowering the feed conversion ratio and removing the bottom sediments regularly could help improve production efficiency, reduce the excessive accumulation of carbon-rich detritus and minimize the climatic warming impacts of aquaculture production. Journal Article Agriculture, Ecosystems and Environment 335 107995 Elsevier BV 0167-8809 Aquaculture ponds; Carbon budget; Carbon dioxide; Methane; Global warming potential 1 9 2022 2022-09-01 10.1016/j.agee.2022.107995 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University Not Required This work was funded by the National Natural Science Foundation of China (NSFC) (grant numbers 41801070 and 41671088), and the Natural Science Foundation of Fujian Province of China (grant numbers 2020J01136 and 2018J01737). 2024-07-10T12:17:44.7448755 2022-04-26T16:45:07.1519713 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 Nan Yang 5 Derrick Y.F. Lai 6 Yan Hong 7 Manjing Ruan 8 Yingying Tan 9 Guanghui Zhao 10 Ling Li 11 Chen Tang 12 59907__23916__3e1e6c83a935455b86941977789a3af9.pdf AGEE_authorfinal_26Apr2022.pdf 2022-04-26T16:49:41.7176708 Output 8563860 application/pdf Accepted Manuscript true 2023-05-04T00:00:00.0000000 ©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 |
Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China |
spellingShingle |
Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China Kam Tang |
title_short |
Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China |
title_full |
Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China |
title_fullStr |
Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China |
title_full_unstemmed |
Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China |
title_sort |
Insights into the farming-season carbon budget of coastal earthen aquaculture ponds in southeastern China |
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 Nan Yang Derrick Y.F. Lai Yan Hong Manjing Ruan Yingying Tan Guanghui Zhao Ling Li Chen Tang |
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Agriculture, Ecosystems and Environment |
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335 |
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107995 |
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10.1016/j.agee.2022.107995 |
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Elsevier BV |
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description |
Small-hold aquaculture ponds are widespread in China, but their carbon greenhouse gas emissions are poorly quantified. In this study, we used a carbon budget approach to assess the climate footprint of three earthen aquaculture ponds in southeastern China with the whiteleg shrimp (Litopenaeus vannamei) during the farming period. The main carbon inputs to the ponds were planktonic primary production (58.5–61.8%), followed by commercial feeds (31.9-35.3%), while the major carbon outputs occurred through planktonic respiration (44.0–53.6%) and sedimentation (18.0–21.7%). Water-to-air emissions of carbon greenhouse gases (CO2 and CH4) represented only a small fraction of the carbon flow (0.8–1.6%), with a combined CO2-equivalent emission of 528.4±193.3 mg CO2-eq m−2 h−1 based on GWP20. We also observed significant spatio-temporal variation in carbon greenhouse gases among the three ponds, which could be attributed to the variation in Chl-a and carbon substrate supply. Nevertheless, the magnitude of CH4 emission from these ponds was still higher than some other agro-ecosystems. Moreover, we found that only 21% of the excess organic carbon was converted to shrimp biomass, while another 20% ended up in the sediment. Our findings suggested that lowering the feed conversion ratio and removing the bottom sediments regularly could help improve production efficiency, reduce the excessive accumulation of carbon-rich detritus and minimize the climatic warming impacts of aquaculture production. |
published_date |
2022-09-01T12:17:44Z |
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1804190628275290112 |
score |
11.021648 |