Magnitudes, patterns, controls and mitigation potentials of net ecosystem carbon balances across wetlands in China

作者：Lei Ma, Dezhao Gan, Z. Li, Dongyou Wu, Wei Pu, Xiangyue Chen, Gaofeng Zhu, Shuli Niu, Jinsong Wang, Ruijun Long, Hongchao Zuo · 发表于：Geoderma · 年份：2025 · DOI：10.1016/j.geoderma.2025.117332 · 被引用次数：1 · 研究领域：Coastal wetland ecosystem dynamics、Peatlands and Wetlands Ecology、Environmental Changes in China

Drainage resulted in natural wetlands in China turning from net carbon sinks to net carbon sources, while rewetting turned drained wetlands from net carbon sources to net carbon sinks. NECB, net ecosystem carbon balance. • Annual net ecosystem carbon balance (NECB) across Chinese wetlands was evaluated. • Drainage resulted in natural wetlands turning from net C sinks to net C sources. • Rewetting turned drained wetlands from net C sources to net C sinks. • Restoration measures should be taken immediately to mitigate wetland C losses. China contains Asia’s largest wetlands, which include diverse wetland types, e.g., peatlands, marshes and mangroves; these wetlands are found from inland to coastal regions. Over the past four decades, considerable amounts of natural wetlands have been drained, thus severely decreasing their carbon (C) sequestration ability. Recent rewetting has been initiated to restore wetland ecosystem services and mitigate carbon dioxide (CO 2 ) emissions. However, the magnitudes, patterns, controls and mitigation potentials of annual net ecosystem C balances (NECB) have not been adequately studied, leading to large uncertainties in predicting wetland C cycles under climate change and anthropogenic activities across different wetlands in China. These influencing factors include the combinations of vertical net ecosystem exchange of CO 2 (NEE) and horizontal C removal through biomass harvest, as well as dissolved organic and inorganic C (DOC and DIC) exports. ...