Aquaculture,as the fastest-growing food production sector in the world,is becoming an increasingly nonnegligible source of greenhouse gas emissions.Despite this,there has been limited research on nitrous oxide(N_(2)O)...Aquaculture,as the fastest-growing food production sector in the world,is becoming an increasingly nonnegligible source of greenhouse gas emissions.Despite this,there has been limited research on nitrous oxide(N_(2)O)emission from marine aquaculture in China,where more marine aquaculture occurs than anywhere else,globally.We estimated N_(2)O emissions(E)from marine mariculture of 10 fish and 6 crustacean species in China from 2003 to 2022 using production data from the China Fishery Statistical Yearbook(2004–2023),and data for feed conversion rates and types from the literature.From 2003,marine aquaculture production,the annual N_(2)O emissions(E_(A)),and the annual N_(2)O emissions per unit of aquaculture area(EI_(A))trend upward.The E_(A)of fish culture was lower than that of crustaceans,but the EI_(A)of fish culture was generally higher.Sea bass(0.308 Tg/a,in terms of N)and white shrimp(0.945 Tg/a,in terms of N)had the highest average E_(A)among fish and crustacean cultures,respectively.The highest average E_(A)from fish and crustacean were both Guangdong Province(fish:0.248 Tg,crustacean:0.547 Tg),and the highest sea area were both the South China Sea(fish:0.316 Tg,crustacean:1.082 Tg);the highest average EI_(A)for fish and crustacean were Tianjin City[35.40 t/(hm^(2)·a)]and Guangxi Zhuang Autonomous Region[19.83 t/(hm^(2)·a)],respectively,and the highest sea areas were both the South China Sea(fish:0.316 Tg,crustacean:1.082 Tg).These analyses provide baseline data for a greenhouse gas emissions inventory for China,based on an interpretation of them,we provide recommendations for reducing N_(2)O emissions in marine fish and crustacean culture.展开更多
基金The Basic Research Funding Projects of Liaoning Provincial Education Department unde contract No.JYTMS20230498the State Environmental Protection Key Laboratory of Coastal Ecosystem Open Project Fund of China unde contract No.202305+1 种基金the Research Foundation for Talented Scholars of Dalian Ocean University unde contract No.HDYJ202121the Key Laboratory of Environment Controlled Aquaculture(Dalian Ocean University)Ministry of Education Open Project Fund of China unde contract No.2021-MOEKLECA-KF-01。
文摘Aquaculture,as the fastest-growing food production sector in the world,is becoming an increasingly nonnegligible source of greenhouse gas emissions.Despite this,there has been limited research on nitrous oxide(N_(2)O)emission from marine aquaculture in China,where more marine aquaculture occurs than anywhere else,globally.We estimated N_(2)O emissions(E)from marine mariculture of 10 fish and 6 crustacean species in China from 2003 to 2022 using production data from the China Fishery Statistical Yearbook(2004–2023),and data for feed conversion rates and types from the literature.From 2003,marine aquaculture production,the annual N_(2)O emissions(E_(A)),and the annual N_(2)O emissions per unit of aquaculture area(EI_(A))trend upward.The E_(A)of fish culture was lower than that of crustaceans,but the EI_(A)of fish culture was generally higher.Sea bass(0.308 Tg/a,in terms of N)and white shrimp(0.945 Tg/a,in terms of N)had the highest average E_(A)among fish and crustacean cultures,respectively.The highest average E_(A)from fish and crustacean were both Guangdong Province(fish:0.248 Tg,crustacean:0.547 Tg),and the highest sea area were both the South China Sea(fish:0.316 Tg,crustacean:1.082 Tg);the highest average EI_(A)for fish and crustacean were Tianjin City[35.40 t/(hm^(2)·a)]and Guangxi Zhuang Autonomous Region[19.83 t/(hm^(2)·a)],respectively,and the highest sea areas were both the South China Sea(fish:0.316 Tg,crustacean:1.082 Tg).These analyses provide baseline data for a greenhouse gas emissions inventory for China,based on an interpretation of them,we provide recommendations for reducing N_(2)O emissions in marine fish and crustacean culture.
