在大规模灭绝的恢复过程中,与生态系统功能和弹性脱的多样性
Sarah A Alvarez1,2,3, Samantha J Gibbs4, Paul R Bown5
1School of Geographical Sciences, University of Bristol, Bristol, UK. sarah.alvarez@unigib.edu.gi.
Nature
|September 27, 2019
概括
这次撞击造成了海洋生态系统的崩. 撞击后海洋群落需要180万年才能稳定,恢复碳循环和生物效率,
科学领域:
- 古代海洋学
- 海洋生态
- 生物地质化学
背景情况:
- 6600万年前的奇克苏鲁布星体撞击导致大规模灭绝事件,导致海洋生态系统的崩和全球生物地球化学循环的破坏.
- 由于缺乏详细的生物数据,对海洋生态系统在冲击后恢复和恢复的时间表和机制的理解受到限制.
研究的目的:
- 研究海洋生态系统和生物地化学功能的奇克苏布后影响恢复.
- 确定生态系统波动的时间范围以及一个稳定,有弹性的社区的出现.
- 将生态系统恢复与海洋碳循环和生物功能恢复联系起来.
主要方法:
- 一个1300万年纳米浮游生物时间序列的分析, 跨越撞击后的间隔.
- 检查社区结构,细胞大小谱和生物地化学循环的指标.
- 生物数据与碳循环恢复和生物功能的相关性.
主要成果:
- 撞击后的海洋社区经历了180万年的重大波动.
- 一个稳定的,有弹性的平衡状态社区出现了,其特点是更广泛的细胞大小.
- 过渡到这个稳定的社区恰逢恢复碳循环和完全运行的生物.
- 尽管社区稳定性和生物效率得到恢复,但物种丰富度仍然很低.
结论:
- 生态系统的恢复和生态化学循环在长时间内基本相关.
- 生态功能,而不仅仅是物种丰富, 是社区性和海洋健康的关键驱动因素.
- 这项研究对冲击后恢复的估计进行了精细化,表明功能恢复的时间远远短于全面的分类丰富性.
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