| 杨承功,钱畅,汪宁欣,吴骏明,余杰予,周旭东,刘艺轩,李顺,于志国.土壤/沉积物干湿交替关键带水位波动调控温室气体排放的氧化还原机制[J].农业环境科学学报,2025,44(12):3025-3040. |
| 土壤/沉积物干湿交替关键带水位波动调控温室气体排放的氧化还原机制 |
| Redox mechanisms by which water table fluctuations in the critical zone of soil/sediment wet-dry alternation regulate greenhouse gases emissions |
| 投稿时间：2024-12-18 |
| DOI：10.11654/jaes.2024-1107 |
| 中文关键词: 水位变化 天然有机质（NOM） 氧化还原 水陆交错带 温室气体 |
| 英文关键词: water level fluctuations natural organic matter（NOM） redox aquatic-terrestrial ecotone greenhouse gases |
| 基金项目:国家自然科学基金项目（32471702） |
| 作者 | 单位 | E-mail | | 杨承功 | 南京信息工程大学, 南京 210044 | | | 钱畅 | 南京信息工程大学, 南京 210044 | | | 汪宁欣 | 南京信息工程大学, 南京 210044
南京工程学院, 南京 211167 | | | 吴骏明 | 南京信息工程大学, 南京 210044 | | | 余杰予 | 南方科技大学, 广东 深圳 518000 | | | 周旭东 | 水利部南京水利科学研究院, 南京 210029 | | | 刘艺轩 | 天津大学地球科学学院, 天津 300100 | | | 李顺 | 山东大学微生物技术研究院, 山东 青岛 266237 | | | 于志国 | 南京信息工程大学, 南京 210044 | zhiguo.yu@nuist.edu.cn |
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| 中文摘要: |
| 受近年来频发的极端气候影响，水生生态系统水陆交错带中的水位浮动较大。其中不断变化的水位高度、淹水时长以及干湿交替频率会对水陆交错带土壤/沉积物中温室气体的排放产生显著影响。天然有机质（NOM）作为一种氧化还原活性物质在水陆交错带土壤/沉积物中广泛分布，并且能够通过驱动元素的氧化还原反应，竞争性地获取CO2、CH4等温室气体生成所需要的电子源，从而参与调控温室气体的排放。本文综述了水位变化下NOM在干湿交替循环过程中调节电子流归趋的动态微观机制以及相应微生物结构与功能变化机制的研究现状，并且进一步讨论了水陆交错带水位垂直变化调控温室气体排放过程的生物地球化学耦合机制。同时，本文还探讨了当下用于陆地水体的碳循环模拟以及温室气体排放预测的不同生态系统模型，并且重点阐述了基于氧化还原的地球生态系统模型的潜在优势。综述表明，一系列的影响因素导致了水陆交错带碳排放核算的不确定性。 |
| 英文摘要: |
| In recent years, frequent extreme climate events have led to significant fluctuations in water levels within the riparian zones of aquatic ecosystems. The varying water level heights, flooding durations, and the frequency of wet-dry cycles have a substantial impact on the emission of greenhouse gases from soils/sediments in aquatic-terrestrial ecotone. Natural organic matter（NOM）, as a redox-active substance, is widely distributed in the soils/sediments of riparian zones and can drive the oxidation and reduction of elements to competitively obtain the electron sources required for the generation of greenhouse gases such as CO2 and CH4, thereby participating in the regulation of greenhouse gas emissions. Therefore, this review summarizes the current state of research on the dynamic micro-mechanisms of NOM regulating electron flow during dry-wet alternation cycles under varying water levels, as well as the corresponding changes in microbial structure and function. Furthermore, it discusses the biogeochemical coupling mechanisms by which vertical water level changes regulate the emission of greenhouse gases in riparian zones. Meanwhile, this review also explores different ecosystem models currently used for carbon cycle simulation of terrestrial water bodies and prediction of greenhouse gas emissions, and focuses on elaborating the potential advantages of the redox-based global ecosystem model. To sum up, a series of influencing factors have led to the uncertainty in carbon emission accounting in aquatic-terrestrial ecotone. |
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