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非洪水平原湿地是美国各地的碳储存发电厂
Charles R Lane1, Amanda M Nahlik2, Jay Christensen3
1Ecosystem Processes Division, U.S. EPA, Office of Research and Development, Center for Environmental Measurement and Modeling, Athens, GA, USA.
概括
非洪水平原湿地 (NFWs) 比其他湿地类型储存的碳要多得多. 湿地条件影响碳储存,完整的NFW储存了土壤有机碳的大部分,突出了它们对全球碳流管理的重要性.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 土壤科学 土壤科学
背景情况:
- 湿地碳储存对于管理全球碳流量至关重要.
- 非洪水平原湿地 (NFWs) 是普遍存在的内陆湿地,但它们的碳动态代表了重要的知识差距.
- 超过50%的世界剩余的湿地是NFW.
研究的目的:
- 量化土壤有机碳密度和总碳储存在不同类型的水合地形态分类湿地类型在美国 (CONUS).
- 将NFW中的碳储存与其他湿地类型进行比较.
- 评估湿地状况 (变化与完整) 如何影响NFW中的碳储存.
主要方法:
- 分析了来自CONUS.全国全国湿地状况评估 (NWCA) 采样的近2000个湿地地点的现场数据.
- 湿地类型的水文地理形态分类.
- 在NFW与其他湿地类型之间以及在不同条件下的NFW之间比较土壤有机碳密度和总碳储存.
主要成果:
- 每公的NFW含有大约1.5倍的土壤有机碳,而不是其他采样的湿地类型.
- 在整个CONUS地区,NFW储存的碳总量大约是所有深度增加的2.0倍,与其他湿地类型相比.
- 最少受损的NFW表现出土壤有机碳密度比中等受损NFW高1.6倍,比受损NFW最多高1.8倍.
结论:
- NFW是重要的碳储库,比其他湿地类型储存的碳要多得多.
- 湿地条件极大地影响碳储存,完整的NFW保留了最大的碳库存.
- 由于保护措施日益减弱,NFW的破坏日益增加,可能导致大气和出口大量的碳排放.
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