在中国南部的海草草的蓝色碳储存和封存的空间变化
Xiaomei Shen1, Yuan Zhang2, Yiguo Hong1
1Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.
The Science of the total environment
|August 31, 2024
概括
海草草地储存大部分碳在沉积物中,但区域储量低于全球平均水平. 了解当地因素是评估其气候减缓潜力的关键.
科学领域:
- 海洋生态海洋生态学
- 生物地质化学生物地质化学
- 气候变化科学 气候变化科学
背景情况:
- 海草草地是重要的碳汇,对减缓气候变化至关重要.
- 有限的数据存在于海草蓝色碳库存和封存率的区域变化.
- 亚热带海草生态系统,比如中国的海草生态系统,研究不足.
研究的目的:
- 量化中国亚热带海草草原的有机碳 (Corg) 库存和碳积累率 (CAR).
- 分析影响沉积物Corg库存变化的因素.
- 为全球海草蓝色碳评估提供来自研究不足地区的数据.
主要方法:
- 在七个海草草原的生物质和沉积物中估计Corg的库存.
- 在海草沉积物中测量碳积累率 (CAR).
- 对影响科尔格矿物化的沉积物物理化学因素 (水分,盐度,CaCO3,散装密度) 的分析.
主要成果:
- 沉积物储存绝大多数 (99.83%) 的有机碳在海草草地.
- 平均Corg库存明显低于全球平均水平.
- 沉积物Corg库存在各个地点之间差异很大,Liusha Bay显示的最高.
- 平均沉积物CAR为53.47g C m-2 yr-1.1,而C m-2 yr-1.0 的平均沉积物CAR为53.47g C m-2 yr-1.1.
结论:
- 海草的碳储存在区域上高度变化,沉积物是主要的储存库.
- 诸如高湿度和盐度等物理化学因素抑制了Corg矿化.
- 准确评估海草的气候减缓潜力需要考虑当地和地区的差异.
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