Carbon fluxes of China's coastal wetlands and impacts of reclamation and restoration
Lu, Weizhi1,2; Xiao, Jingfeng3; Gao, Haiqiang1,2; Jia, Qingyu4; Li, Zhengjie1,2; Liang, Jie5; Xing, Qinghui6; Mao, Dehua7; Li, Hong8,9; Chu, Xiaojing10; Chen, Hui11; Guo, Haiqiang8,9; Han, Guangxuan10; Zhao, Bin8,9; Chen, Luzhen12; Lai, Derrick Y. F.13,14; Liu, Shuguang1,2; Lin, Guanghui5,15,16
Keywordblue carbon carbon budget carbon dioxide flux coastal wetland land-use change reclamation restoration
Corresponding AuthorXiao, Jingfeng(
AbstractCoastal wetlands play an important role in regulating atmospheric carbon dioxide (CO2) concentrations and contribute significantly to climate change mitigation. However, climate change, reclamation, and restoration have been causing substantial changes in coastal wetland areas and carbon exchange in China during recent decades. Here we compiled a carbon flux database consisting of 15 coastal wetland sites to assess the magnitude, patterns, and drivers of carbon fluxes and to compare fluxes among contrasting natural, disturbed, and restored wetlands. The natural coastal wetlands have the average net ecosystem exchange of CO2 (NEE) of -577 g C m(-2) year(-1), with -821 g C m(-2) year(-1) for mangrove forests and -430 g C m(-2) year(-1) for salt marshes. There are pronounced latitudinal patterns for carbon dioxide exchange of natural coastal wetlands: NEE increased whereas gross primary production (GPP) and respiration of ecosystem decreased with increasing latitude. Distinct environmental factors drive annual variations of GPP between mangroves and salt marshes; temperature was the dominant controlling factor in salt marshes, while temperature, precipitation, and solar radiation were co-dominant in mangroves. Meanwhile, both anthropogenic reclamation and restoration had substantial effects on coastal wetland carbon fluxes, and the effect of the anthropogenic perturbation in mangroves was more extensive than that in salt marshes. Furthermore, from 1980 to 2020, anthropogenic reclamation of China's coastal wetlands caused a carbon loss of similar to 3720 Gg C, while the mangrove restoration project during the period of 2021-2025 may switch restored coastal wetlands from a carbon source to carbon sink with a net carbon gain of 73 Gg C. The comparison of carbon fluxes among these coastal wetlands can improve our understanding of how anthropogenic perturbation can affect the potentials of coastal blue carbon in China, which has implications for informing conservation and restoration strategies and efforts of coastal wetlands.
Funding OrganizationNatural Science Foundation of Hunan Province ; Institute of Atmospheric Environment ; National Natural Science Foundation of China ; University of New Hampshire through Bridge Support ; US-China Carbon Consortium (USCCC)
Indexed BySCI
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS IDWOS:001201778500001
Citation statistics
Document Type期刊论文
Corresponding AuthorXiao, Jingfeng
Affiliation1.Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Changsha, Peoples R China
2.Cent South Univ Forestry & Technol, Natl Engn Lab Appl Technol Forestry & Ecol South C, Changsha, Peoples R China
3.Univ New Hampshire, Earth Syst Res Ctr, Inst Study Earth Oceans & Space, Durham, NH 03824 USA
4.China Meteorol Adm, Inst Atmospher Environm, Shenyang, Peoples R China
5.Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China
6.Natl Marine Environm Monitoring Ctr, Key Lab Ecol Environm Coastal Areas, Dalian, Peoples R China
7.Chinese Acad Sci, Northeast Inst Geog & Agroecol, State Key Lab Black Soils Conservat & Utilizat, Changchun, Peoples R China
8.Fudan Univ, Minist Educ, Key Lab Biodivers Sci & Ecol Engn, Natl Observat & Res Stn Wetland Ecosyst Yangtze Es, Shanghai, Peoples R China
9.Fudan Univ, Inst Ecochongming IEC, Shanghai, Peoples R China
10.Chinese Acad Sci, Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China
11.Yangtze Univ, Coll Life Sci, Jingzhou, Peoples R China
12.Xiamen Univ, Coll Environm & Ecol, Key Lab, Minist Educ Coastal & Wetland Ecosyst, Xiamen, Peoples R China
13.Chinese Univ Hong Kong, Dept Geog & Resource Management, Shatin, Hong Kong, Peoples R China
14.Chinese Univ Hong Kong, Ctr Environm Policy & Resource Management, Shatin, Hong Kong, Peoples R China
15.Tsinghua Univ, Inst Ocean Engn, Shenzhen Int Grad Sch, Shenzhen, Peoples R China
16.Hainan Res Acad Environm Sci, Hainan Int Blue Carbon Res Ctr, Haikou, Peoples R China
Recommended Citation
GB/T 7714
Lu, Weizhi,Xiao, Jingfeng,Gao, Haiqiang,et al. Carbon fluxes of China's coastal wetlands and impacts of reclamation and restoration[J]. GLOBAL CHANGE BIOLOGY,2024,30(4):14.
APA Lu, Weizhi.,Xiao, Jingfeng.,Gao, Haiqiang.,Jia, Qingyu.,Li, Zhengjie.,...&Lin, Guanghui.(2024).Carbon fluxes of China's coastal wetlands and impacts of reclamation and restoration.GLOBAL CHANGE BIOLOGY,30(4),14.
MLA Lu, Weizhi,et al."Carbon fluxes of China's coastal wetlands and impacts of reclamation and restoration".GLOBAL CHANGE BIOLOGY 30.4(2024):14.
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