在海平面快速上升的情况下,红树林生存的门
N Saintilan1, N S Khan2,3, E Ashe4
1Department of Earth and Environmental Sciences, Macquarie University, Macquarie Park, NSW, Australia. neil.saintilan@mq.edu.au.
概括
红树林在脱冰过程中扩大,但当相对海平面上升超过6.1毫米/年时,它们在垂直上难以增长. 热带地区的海岸可能会在30年内超过这一门.
科学领域:
- 古代海洋学
- 沿海生态
- 气候变化科学
背景情况:
- 红树林生态系统对相对快速海平面上升 (RSLR) 的反应尚不清楚.
- 红树林在海岸保护和碳捕获方面发挥着至关重要的作用.
- 了解红树林增长的极限对于预测沿海的脆弱性至关重要.
研究的目的:
- 调查在高RSLR下可持续的最大红树林垂直增长率.
- 确定红树林无法维持高度的关键RSLR值.
- 评估过去降冰时期的红树林的历史表现.
主要方法:
- 将红树林垂直增长的时间和速度与全球78个地点的模拟RSLR进行了比较.
- 分析了沉积物中的有机物积累率.
- 使用古气候数据重建过去的RSLR条件.
主要成果:
- 红树林在9800年至7500年前垂直扩大和增长.
- 红树林的垂直增长率主要由RSLR驱动.
- 长期增加红树林的高概率 (> 90%) 值是6.1mm/年.
结论:
- 红树林的增长能力有限,临界RSLR值为6.1mm/年.
- 在高排放场景下,热带海岸线可能在30年内超过这一门.
- 未来的红树林生存和功能受到海平面上升的威胁.
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