深水珊瑚表明,红海在最后一个冰川低潮中幸存下来
Morgan I Chakraborty1, Arash Sharifi1,2, Francesca Benzoni3
1Department of Marine Geosciences, Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, Miami, FL 33149.
概括
红海就是红海.
科学领域:
- 海洋地质学海洋地质学
- 古海洋学是古海洋学.
- 海洋生态海洋生态学
背景情况:
- 红海与印度洋的连接受到一个浅海峡的限制.
- 在最后一个冰川时期,海平面的大幅下降可能导致了严重的环境变化.
- 以前的假设表明,由于盐度升高和氧气耗尽,盆地范围内的灭绝.
研究的目的:
- 为了研究红海最后一次冰川海平面低位的生态影响.
- 测试水力动力学限制导致严重生态后果的假设.
- 评估过去低海平面时期红海海洋生态系统的弹性.
主要方法:
- 来自红海北部26个地点的深水珊瑚 (DWCs) 的-测年.
- 红海水化学和温度的地化学分析.
- 对27个深海核的元分析,检查微化石组合.
主要成果:
- 深水珊瑚在最后一个冰川时期的海平面低点期间和之后显示出生长,这表明了可以容忍的条件.
- 地化学数据显示,红海化学或温度在最近的普世和全新世之间没有显著的差异.
- 浮游生物菌体经历了局部灭绝,但其他微化石群仍然存在.
结论:
- 红海在过去的海平面低点期间没有经历完全的生态崩.
- 红海的海洋生态系统,尽管海平面发生了重大变化,但仍表现出了弹性.
- 这些发现挑战了关于冰川时期红海环境历史的先前假设.
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