Elevating water table reduces net ecosystem carbon losses from global drained wetlands
文献类型：期刊论文
| 作者 | Liu, Ning6,7; Wang, Quancheng; Zhou, Ronglei; Zhang, Ruiyang; Tian, Dashuan7; Gaffney, Paul P. J.; Chen, Weinan4; Gan, Dezhao3; Zhang, Zelong2,3; Niu, Shuli6,7 |
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 30期号:9页码:e17495 |
| 关键词 | drainage lateral carbon exports net ecosystem carbon balance rewetting water table depth |
| DOI | 10.1111/gcb.17495 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Drained wetlands are thought to be carbon (C) source hotspots, and rewetting is advocated to restore C storage in drained wetlands for climate change mitigation. However, current assessments of wetland C balance mainly focus on vertical fluxes between the land and atmosphere, frequently neglecting lateral carbon fluxes and land-use effects. Here, we conduct a global synthesis of 893 annual net ecosystem C balance (NECB) measures that include net ecosystem exchange of CO2, along with C input via manure fertilization, and C removal through biomass harvest or hydrological exports of dissolved organic and inorganic carbon, across wetlands of different status and land uses. We find that elevating water table substantially reduces net ecosystem C losses, with the annual NECB decreasing from 2579 (95% interval: 1976 to 3214) kg C ha-1 year-1 in drained wetlands to -422 (-658 to -176) kg C ha-1 year-1 in natural wetlands, and to -934 (-1532 to -399) kg C ha-1 year-1 in rewetted wetlands globally. Climate, land-use history, and time since water table changes introduce variabilities, with drainage for (sub)tropical agriculture or forestry uses showing high annual C losses, while the net C losses from drained wetlands can continue to affect soil C pools for several decades. Rewetting all types of drained wetlands is needed, particularly for those formerly agriculture-used (sub)tropical wetlands where net ecosystem C losses can be largely reduced. Our findings suggest that elevating water table is an important initiative to reduce C losses in degraded wetlands, which could contribute to policy decisions for managing wetlands to enhance their C sequestration. We compile a global dataset of 893 annually net ecosystem carbon balance that includes net ecosystem exchange of CO2 and lateral carbon fluxes across global wetlands of different status and land uses. We provide empirical evidence that elevating water table can substantially reduce net ecosystem carbon losses from drained wetlands. Rewetting all types of drained wetlands is needed, particularly for those formerly agriculture-used (sub)tropical wetlands where net ecosystem carbon losses can be largely reduced. Our study highlights the importance of conserving natural wetlands and rewetting drained wetlands globally to mitigate climate change.image |
| WOS关键词 | GREENHOUSE-GAS BALANCE ; EDDY COVARIANCE ; SOIL CARBON ; CO2 FLUXES ; PEAT ; SEQUESTRATION |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| WOS记录号 | WOS:001304591100001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/208025]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Jinsong |
| 作者单位 | 1.Gansu Agr Univ, Coll Grassland Sci, Lanzhou, Peoples R China 2.Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China 3.Cornell Univ, Sch Integrat Plant Sci, Ithaca, NY USA 4.Gaffney, Paul P. J.] Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Beijing, Peoples R China 6.Univ Chinese Acad Sci, Beijing, Peoples R China 7.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Ning,Wang, Quancheng,Zhou, Ronglei,et al. Elevating water table reduces net ecosystem carbon losses from global drained wetlands[J]. GLOBAL CHANGE BIOLOGY,2024,30(9):e17495. |
| APA | Liu, Ning.,Wang, Quancheng.,Zhou, Ronglei.,Zhang, Ruiyang.,Tian, Dashuan.,...&Wang, Jinsong.(2024).Elevating water table reduces net ecosystem carbon losses from global drained wetlands.GLOBAL CHANGE BIOLOGY,30(9),e17495. |
| MLA | Liu, Ning,et al."Elevating water table reduces net ecosystem carbon losses from global drained wetlands".GLOBAL CHANGE BIOLOGY 30.9(2024):e17495. |
入库方式： OAI收割
来源：地理科学与资源研究所
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