Ecosystem carbon exchange across China's coastal wetlands: Spatial patterns, mechanisms, and magnitudes
文献类型：期刊论文
| 作者 | Wang, Jilong; Yu, Guirui1,2,3; Han, Lang; Yao, Yuan; Sun, Mingyu; Yan, Zhifeng |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2024-02-15 |
| 卷号 | 345页码:109859 |
| 关键词 | Coastal wetlands Ecosystem carbon fluxes Spatial patterns Blue carbon |
| DOI | 10.1016/j.agrformet.2023.109859 |
| 产权排序 | 2 |
| 英文摘要 | Coastal wetlands are of great importance for global carbon cycle and climate mitigation because of their strong carbon uptake capacity. However, the national-scale ecosystem carbon exchange dynamics in coastal wetlands, including magnitudes, spatial patterns, and controlling mechanisms, remains poorly understood. In this study, we utilized eddy covariance measurements from China's coastal wetlands to quantify carbon fluxes, assess their spatial patterns, and explore the controlling mechanisms. Integrating climate, vegetation, and soil factors, we constructed a cascaded relationship network to reveal the potential controlling mechanisms of spatial variations in carbon fluxes. The results revealed that gross primary production (GPP) and ecosystem respiration (ER) were 1405 +/- 656 (mean +/- sd) gC m(-2) yr(-1)and 893 +/- 465, respectively. Net ecosystem production (NEP) in coastal wetlands (567 +/- 348 gC m(-2) yr(-1)) exceeded China's terrestrial and marine ecosystems by 2-8 times, highlighting their significant carbon sink capacity. The carbon sink capacity in mangroves was significantly higher than salt marsh, exhibiting a twofold difference in NEP. Spatially, carbon fluxes displayed negative correlations with latitude, indicating the influence of climate features. Although tropical climate zone exhibited significantly higher carbon fluxes than temperate zone, no differences were observed between subtropics zone with others due to the distribution of mixed plants and largest area. The structural equation model (SEM) showed that the climate factors, including temperature, precipitation, and net radiation indirectly promoted GPP and ER through regulating the physiological process of mangrove and salt marsh, as well as soil carbon production and consumption. The cascaded relationship of climate-vegetation-soil showed in SEM explained 71-85 % of the spatial variations in GPP and ER, and ultimately accounted for 85 % of NEP. The carbon consumption efficiency (ER/GPP) in coastal vegetations was of 0.6, lower than that of global and China's terrestrial ecosystems, suggesting their strong efficiency in carbon fixation in coastal wetlands. Lastly, the scenario simulation results implied the importance of coastal vegetation restoration on enhancing blue carbon benefits. |
| WOS关键词 | CO2 EXCHANGE ; TERRESTRIAL ECOSYSTEMS ; DIOXIDE FLUXES ; SOIL RESPIRATION ; CLIMATE-CHANGE ; HUMAN IMPACTS ; BLUE CARBON ; SEQUESTRATION ; STORAGE ; MARSH |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:001138954500001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/201693]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 作者单位 | 1.Tianjin Univ, Inst Surface Earth Syst Sci, Sch Earth Syst Sci, Tianjin 300072, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jilong,Yu, Guirui,Han, Lang,et al. Ecosystem carbon exchange across China's coastal wetlands: Spatial patterns, mechanisms, and magnitudes[J]. AGRICULTURAL AND FOREST METEOROLOGY,2024,345:109859. |
| APA | Wang, Jilong,Yu, Guirui,Han, Lang,Yao, Yuan,Sun, Mingyu,&Yan, Zhifeng.(2024).Ecosystem carbon exchange across China's coastal wetlands: Spatial patterns, mechanisms, and magnitudes.AGRICULTURAL AND FOREST METEOROLOGY,345,109859. |
| MLA | Wang, Jilong,et al."Ecosystem carbon exchange across China's coastal wetlands: Spatial patterns, mechanisms, and magnitudes".AGRICULTURAL AND FOREST METEOROLOGY 345(2024):109859. |
入库方式： OAI收割
来源：地理科学与资源研究所
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