Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China

Yang, Ping; Zhao, Guanghui; Tong, Chuan; Tang, Kam; Lai, Derrick Y.F.; Li, Ling; Tang, Chen

doi:10.1016/j.agee.2021.107662

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Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China

Ping Yang, Guanghui Zhao, Chuan Tong, Kam Tang

, Derrick Y.F. Lai, Ling Li, Chen Tang

Agriculture, Ecosystems & Environment, Volume: 322, Start page: 107662

Swansea University Author: Kam Tang

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DOI (Published version): 10.1016/j.agee.2021.107662

Abstract

Aquaculture can cause serious environmental pollution in the coastal zone. The construction of nutrient budget can provide a scientific basis for understanding the fate of nutrients in the aquaculture systems to facilitate sustainable aquaculture management. In this study, we characterized the nitro...

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Published in:	Agriculture, Ecosystems & Environment
ISSN:	0167-8809
Published:	Elsevier BV 2021
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URI:	https://cronfa.swan.ac.uk/Record/cronfa57801
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In this study, we characterized the nitrogen (N) and phosphorus (P) budgets of coastal land-based aquaculture ponds practicing monoculture of whiteleg shrimps (Litopenaeus vannamei) at the subtropical estuarine zone in southeastern China. Our results showed that commercial feed was the main input of both N (> 90%) and P (> 95%) during the farming period. N output was mainly through biomass harvesting (43–49 %) and sedimentation (28–44 %), with N2O emission only representing a small fraction of total N loss (≤ 0.03%). Similarly, most of the P was lost through sedimentation (56–68 %) and biomass harvesting (27–31 %). Despite the relatively high nutrient utilization efficiencies of the shrimp ponds, annual drainage of the ponds discharged 49.4 tons of N and 4.7 tons of P into the Min River Estuary, posing a serious threat to water quality. Based on the measured N2O emissions in this study, coastal shrimp ponds in China were estimated to release ca. 1.2 Gg N2O yr-1 to the atmosphere, contributing to 2.9% of the global aquaculture N2O emission. We found that approximately 10% of our nutrient budgets remained unresolved, which might be related to volatilization, seepage and periphyton growth. Better feed formulation, optimized feeding practice and effective sediment management are suggested to help minimize the environmental impacts of the fast-expanding shrimp aquaculture sector in China. 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spelling	2021-10-08T13:30:01.6133855 v2 57801 2021-09-07 Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China 69af43a3b9da24aef65c5d3a44956fe3 0000-0001-9427-9564 Kam Tang Kam Tang true false 2021-09-07 SBI Aquaculture can cause serious environmental pollution in the coastal zone. The construction of nutrient budget can provide a scientific basis for understanding the fate of nutrients in the aquaculture systems to facilitate sustainable aquaculture management. In this study, we characterized the nitrogen (N) and phosphorus (P) budgets of coastal land-based aquaculture ponds practicing monoculture of whiteleg shrimps (Litopenaeus vannamei) at the subtropical estuarine zone in southeastern China. Our results showed that commercial feed was the main input of both N (> 90%) and P (> 95%) during the farming period. N output was mainly through biomass harvesting (43–49 %) and sedimentation (28–44 %), with N2O emission only representing a small fraction of total N loss (≤ 0.03%). Similarly, most of the P was lost through sedimentation (56–68 %) and biomass harvesting (27–31 %). Despite the relatively high nutrient utilization efficiencies of the shrimp ponds, annual drainage of the ponds discharged 49.4 tons of N and 4.7 tons of P into the Min River Estuary, posing a serious threat to water quality. Based on the measured N2O emissions in this study, coastal shrimp ponds in China were estimated to release ca. 1.2 Gg N2O yr-1 to the atmosphere, contributing to 2.9% of the global aquaculture N2O emission. We found that approximately 10% of our nutrient budgets remained unresolved, which might be related to volatilization, seepage and periphyton growth. Better feed formulation, optimized feeding practice and effective sediment management are suggested to help minimize the environmental impacts of the fast-expanding shrimp aquaculture sector in China. Future studies should compare N2O emissions among aquaculture systems with different nutrient utilization efficiencies to improve our assessment of the overall climatic impact of aquaculture operations. Journal Article Agriculture, Ecosystems & Environment 322 107662 Elsevier BV 0167-8809 Nutrient budget; Nitrous oxide (N2O) flux; Zone sampling; Aquaculture ponds; Subtropical estuary 1 12 2021 2021-12-01 10.1016/j.agee.2021.107662 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University Not Required 2021-10-08T13:30:01.6133855 2021-09-07T15:42:59.4335089 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Ping Yang 1 Guanghui Zhao 2 Chuan Tong 3 Kam Tang 0000-0001-9427-9564 4 Derrick Y.F. Lai 5 Ling Li 6 Chen Tang 7 57801__20772__73697d2f00364a4fb96421666888cf27.pdf AGEE accepted 7Sep2021.pdf 2021-09-07T15:47:12.9620529 Output 9280073 application/pdf Accepted Manuscript true 2022-09-24T00:00:00.0000000 ©2021 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	Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China
spellingShingle	Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China Kam Tang
title_short	Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China
title_full	Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China
title_fullStr	Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China
title_full_unstemmed	Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China
title_sort	Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China
author_id_str_mv	69af43a3b9da24aef65c5d3a44956fe3
author_id_fullname_str_mv	69af43a3b9da24aef65c5d3a44956fe3_***_Kam Tang
author	Kam Tang
author2	Ping Yang Guanghui Zhao Chuan Tong Kam Tang Derrick Y.F. Lai Ling Li Chen Tang
format	Journal article
container_title	Agriculture, Ecosystems & Environment
container_volume	322
container_start_page	107662
publishDate	2021
institution	Swansea University
issn	0167-8809
doi_str_mv	10.1016/j.agee.2021.107662
publisher	Elsevier BV
college_str	Faculty of Science and Engineering
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hierarchy_parent_id	facultyofscienceandengineering
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department_str	School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
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description	Aquaculture can cause serious environmental pollution in the coastal zone. The construction of nutrient budget can provide a scientific basis for understanding the fate of nutrients in the aquaculture systems to facilitate sustainable aquaculture management. In this study, we characterized the nitrogen (N) and phosphorus (P) budgets of coastal land-based aquaculture ponds practicing monoculture of whiteleg shrimps (Litopenaeus vannamei) at the subtropical estuarine zone in southeastern China. Our results showed that commercial feed was the main input of both N (> 90%) and P (> 95%) during the farming period. N output was mainly through biomass harvesting (43–49 %) and sedimentation (28–44 %), with N2O emission only representing a small fraction of total N loss (≤ 0.03%). Similarly, most of the P was lost through sedimentation (56–68 %) and biomass harvesting (27–31 %). Despite the relatively high nutrient utilization efficiencies of the shrimp ponds, annual drainage of the ponds discharged 49.4 tons of N and 4.7 tons of P into the Min River Estuary, posing a serious threat to water quality. Based on the measured N2O emissions in this study, coastal shrimp ponds in China were estimated to release ca. 1.2 Gg N2O yr-1 to the atmosphere, contributing to 2.9% of the global aquaculture N2O emission. We found that approximately 10% of our nutrient budgets remained unresolved, which might be related to volatilization, seepage and periphyton growth. Better feed formulation, optimized feeding practice and effective sediment management are suggested to help minimize the environmental impacts of the fast-expanding shrimp aquaculture sector in China. Future studies should compare N2O emissions among aquaculture systems with different nutrient utilization efficiencies to improve our assessment of the overall climatic impact of aquaculture operations.
published_date	2021-12-01T04:13:49Z
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score	11.012678

Assessing nutrient budgets and environmental impacts of coastal land-based aquaculture system in southeastern China

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