海洋微生物群的生物多样性和生物地化学功能的气候驱动的继承
Alyse A Larkin1, Melissa L Brock2, Adam J Fagan1
1Department of Earth System Science, University of California, Irvine, CA, USA.
Nature communications
|April 25, 2025
概括
海洋微生物表现出明显的季节性和厄尔尼诺-南方振荡 (ENSO) 变暖反应,影响海洋功能. 气候变化推动了这些变化,影响了微生物多样性,碳循环和加利福尼亚流中的营养压力.
科学领域:
- 海洋微生物学 海洋微生物学
- 海洋学 海洋学 海洋学
- 气候变化科学 气候变化科学
背景情况:
- 气候驱动的环境循环对海洋微生物群多样性产生重大影响.
- 微生物组对这些循环的功能反应尚不清楚.
- 季节性和厄尔尼诺-南方振荡 (ENSO) 变暖模仿气候变化对海洋的影响.
研究的目的:
- 在11年内量化微生物基因组多样性和功能变化.
- 分析对加利福尼亚流中的季节性和ENSO周期的反应.
- 将微生物生物多样性的变化与功能潜在变化联系起来.
主要方法:
- 对微生物基因组多样性和功能的11年研究.
- 分析季节性和ENSO驱动的海洋学周期.
- 微生物血统,功能基因和生物地化学指标的量化.
主要成果:
- 观察到大基因组 (冬季/春季) 和小基因组 (夏季/秋季) 血统之间的季节性波动.
- 确定了与ENSO条件相关的跨年社区转移.
- 海洋变暖导致铁的减少,宏观营养素压力基因的增加,碳降解的抑制,以及较高的碳与营养素比率.
结论:
- 微生物的生物多样性和功能在不同时间尺度上对气候驱动的循环表现出一致的反应.
- 这些发现凸显了海洋生态系统和生物地球化学循环中气候驱动的重大变化.
- 加利福尼亚电流微生物生态系统对变暖和ENSO事件表现出敏感性.
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