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保护和恢复可以抵消中国湿地转换产生的一半以上的碳排放
Yongxing Ren1,2, Dehua Mao1, Mohamed Abdalla2
1State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
Environmental science & technology
|February 9, 2026
概括
湿地转化为农业造成了中国四十年来土壤有机碳 (SOC) 的重大损失. 然而,湿地恢复部分恢复了SOC,突出了保护保护.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 气候变化研究 气候变化研究
背景情况:
- 湿地转换和恢复对陆地碳循环产生重大影响,但对土壤有机碳 (SOC) 变化的大规模数据有限.
- 了解湿地长期分布和SOC动态对于评估它们在碳封存和气候变化缓解方面的作用至关重要.
研究的目的:
- 绘制中国湿地碳池的地图,并从1980年到2020年量化SOC由于转换和恢复而导致的损失和收益.
- 评估湿地转换对SOC密度的影响以及恢复工作在碳回收方面的有效性.
主要方法:
- 整合了全国范围的湿地SOC密度数据库,多时态湿地地图和地理空间环境数据.
- 应用随机森林模型来绘制国家湿地碳池,并量化四十年来SOC变化.
主要成果:
- 在中国的湿地中,SOC的平均密度为23.10kgCm−2,显示出空间异质性.
- 湿地转化为农业,导致SOC密度在第一个十年减少约19%,在40年内累计损失约574.66 Tg C.
- 湿地恢复恢复了~186.36 Tg C,抵消了~32.4%的转换产生的损失,尽管水平仍低于转换前的基线.
结论:
- 湿地转换显著消耗土壤有机碳,而恢复部分减轻这些损失.
- 湿地保护和恢复是扭转碳损失和促进气候变化减缓目标的重要策略.
- 这一趋势表明,随着时间的推移,SOC转换的损失正在减少,而恢复的收益在增加,这强调了这些做法的重要性.
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