全球评估红树林土壤有机碳来源及其对蓝色碳信用的影响
Jingfan Zhang1,2, Shuchai Gan1, Pingjian Yang3
1Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P.R. China.
Nature communications
|October 18, 2024
概括
红树林土壤储存了大量的有机碳 (OC). 红树林产生的碳是主要来源,对于准确估值蓝色碳信贷至关重要.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 地质化学 地质化学
背景情况:
- 红树林在沉积物中捕获大量的有机碳 (OC).
- 准确量化OC来源对于蓝色碳信用分配至关重要.
- 沿海生态系统在全球碳循环中发挥着关键作用.
研究的目的:
- 全球分析河口和海洋红树林沉积物中土著和土著的OC贡献.
- 量化影响红树林土壤有机碳 (SOC) 库存的OC来源.
- 为了根据OC来源准确分配蓝色碳信用.
主要方法:
- 全球范围内对红树林沉积物的分析.
- 稳定同位素分析,以区分OC来源 (本土与非本土).
- 在河口和海洋环境中量化土壤有机碳 (SOC) 库存.
主要成果:
- 来自红树林的本土OC是河口 (49%) 和海洋 (62%) 红树林中SOC的主要贡献者.
- 陆地原生OC输入 (30%) 在河口沉积物中超过海洋原生OC输入 (21%).
- 河口红树林比海洋红树林 (250MgC ha-1) 储存更多的SOC (282MgC ha-1),主要是由于陆地投入.
- 全球红树林生态系统估计储存4527 Tg C,其中海洋红树林占多数 (67%).
结论:
- 沿海环境环境显著影响OC来源和红树林中的积累.
- 准确的OC源量化对于有效的蓝色碳信用分配至关重要.
- 红树林蓝色碳储量很大,受到当地和外部碳输入的影响.
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