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水平面的升高减少了全球排水湿地的生态系统碳净损失

Ning Liu^1,2,3, Quancheng Wang¹, Ronglei Zhou¹

¹Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.

Global change biology

|September 5, 2024

概括

重灌排水的湿地大大减少了碳损失,将它们转化为碳汇. 这项全球性研究强调了恢复湿地,特别是前农业用地,对于减缓气候变化的重要性.

科学领域:

环境科学环境科学
气候变化研究气候变化研究
生态系统生态学生态学

背景情况:

排水的湿地往往是碳 (C) 的来源,导致气候变化.
当前C平衡评估主要考虑垂直流动,忽视横向C运动和土地使用影响.
建议通过增强的碳储存来缓解气候变化,重新灌湿湿地.

研究的目的:

综合全球湿地净生态系统C平衡 (NECB) 的数据,跨越各种状态和土地用途.
评估水表变化对湿地的碳流的影响.
为了为湿地管理和C封存的政策决策提供信息.

主要方法:

全球综合893个NECB年度测量的全球综合.
包括二氧化碳交换,肥施肥,生物质收获和水文C出口.
通过对排水,自然和重新灌的湿地进行分析,这些湿地具有多样化的土地使用历史.

主要成果:

提高地下水位大大减少了全球生态系统C的净损失.
干的湿地在一年内损失了2579公斤Cha−1,自然湿地在一年内增加了-422公斤Cha−1,重新灌的湿地在一年内增加了-934公斤Cha−1.
农业/林业的排水,特别是在 (亚热带) 地区,导致高碳损失,持续数十年.

结论:

重灌所有被排水的湿地对于减轻碳损失和增强碳封存至关重要.
在 (亚热带) 地区重新灌以前的农业湿地为减少C损失提供了显著的潜力.
提高地下水是恢复退化湿地的碳储存的一个关键策略.

关键词:

排水排水系统排水系统侧向碳出口侧向碳出口生态系统的碳净平衡.让自己再次受湿,让自己重新受湿.水平面深度水平面深度.

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