Four decades of nitrous oxide emission from Chinese aquaculture underscores the urgency and opportunity for climate change mitigation
Bibliographic Data
| ID | 15545117 |
|---|---|
| Authors | Yangen Zhou (0000-0003-3454-0761, Ocean University of China), Ming Huang (0000-0002-4855-3910, Ocean University of China), Hanqin Tian (0000-0002-1806-4091, Auburn University, corresponding author), Rongting Xu (0000-0001-7292-9271, Auburn University), Jian Ge (0000-0002-8497-4480, Ocean University of China), Xiaogang Yang (0000-0002-1142-3100, Ocean University of China), Rongxin Liu (0009-0008-6797-667X, Ocean University of China), Yunxia Sun (0000-0003-0710-9861), Sun Yun-xia (Ocean University of China), Shufen Pan (0000-0001-7920-1427, Auburn University), Qinfeng Gao (Ocean University of China), Shuanglin Dong (Ocean University of China, corresponding author) |
| Year | 2021 |
| Volume | 16 |
| Issue | 11 |
| Pages | 114038-114038 |
| Publication date | 2021-10-20 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/ac3177 |
| OpenAlex | W3208272522 |
| Language | EN |
| References cited | 23 |
As the fastest growing food production sector in the world, aquaculture may become an important source of nitrous oxide (N 2 O)—a potent greenhouse gas and the dominant source of ozone-depleting substances in the stratosphere. China is the largest aquaculture producer globally; however, the magnitude of N 2 O emission from Chinese aquaculture systems (CASs) has not yet been extensively investigated. Here, we quantified N 2 O emission from the CASs since the Reform and Opening-up (1979–2019) at the species-, provincial-, and national-levels using annual aquaculture production data, based on nitrogen (N) levels in feed type, feed amount, feed conversion ratio, and emission factor (EF). Our estimate indicates that over the past 41 years, N 2 O emission from CASs has increased approximately 25 times from 0.67 ± 0.04 GgN in 1979 to 16.69 ± 0.31 GgN in 2019. Freshwater fish farming, primarily in two provinces, namely, Guangdong and Hubei, where intensive freshwater fish farming has been adopted in the past decades, accounted for approximately 89% of this emission increase. We also calculated the EF for each species, ranging from 0.79 ± 0.23 g N 2 O kg −1 animal to 2.41 ± 0.14 g N 2 O kg −1 animal. The results of this study suggest that selecting low-EF species and improving feed use efficiency can help reduce aquaculture N 2 O emission for building a climate-resilient sustainable aquaculture
Agriculture · Aquaculture · Biology · Climate change · Environmental protection · Fish · Fishery · Greenhouse gas · Nitrous oxide · Aquaculture Nutrition and Growth · Environmental Science · Fish Ecology and Management Studies · Marine Bivalve and Aquaculture Studies · Ecology
| Citation velocity | historical |
|---|---|
| Highly cited | No |