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蓝色碳对沿海淡水生态系统海平面上升的脆弱性
Suvrajit Ghosh1, Jonathan Obrist-Farner1, Jeffery R Stone2
1Department of Earth Sciences and Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.
The Science of the total environment
|October 4, 2025
概括
沿海淡水生态系统储存了大量的碳,但容易受到海平面上升的影响. 海洋入侵伊萨巴尔湖造成了生态系统损害,减少了碳储存,突出了蓝色碳汇的风险.
科学领域:
- 生态生态学 生态生态学
- 地质化学 地质化学
- 气候变化科学 气候变化科学
背景情况:
- 沿海淡水生态系统提供了重要的环境服务,也是重要的碳汇.
- 由于全球海平面上升 (GSLR),这些生态系统越来越容易受到海洋洪水的影响.
研究的目的:
- 为了调查过去海上入侵伊萨巴尔湖的地化学和生物影响.
- 了解海平面上升对沿海淡水生态系统及其碳储存能力的长期影响.
主要方法:
- 在全新纪海洋入侵之后,伊萨巴尔湖的地化学和生物变化的分析.
- 评估沉积物有机碳度和洪水事件后的生态系统恢复.
主要成果:
- 早期的全新纪海洋入侵将伊萨巴尔湖转变为富含硫的无毒水体,降低了90%的沉积物有机碳,并导致生物多样性丧失.
- 生态系统的恢复需要5000年,但洪水前的条件和碳水平并没有完全恢复.
- 后来的海洋入侵也导致了生物多样性丧失,并进一步减少了沉积物有机碳.
结论:
- 海洋入侵严重破坏沿海淡水生态系统,改变生物地球化学循环,减少蓝色碳的储存.
- 持续的GSLR对这些有价值的生态系统及其环境服务构成重大威胁.
- 由于未来的海洋洪水事件,沿海淡水生态系统可能会遭受不可逆转的损害和功能丧失.
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