未来的海洋变暖可能会大大减少Prochlorococcus生物量和生产力
François Ribalet1, Stephanie Dutkiewicz2,3, Erwan Monier4
1School of Oceanography, University of Washington, Seattle, WA, USA. ribalet@uw.edu.
Nature microbiology
|September 8, 2025
概括
由于温度上升,最丰富的光合作用生物体Prochlorococcus在热带海洋中面临着显著的产量下降. 热适应可能无法防止对这些重要的海洋生态系统产生负面影响.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
背景情况:
- 球菌是地球上最丰富的光合作用生物,对海洋生态系统至关重要.
- 它对气候变化的敏感性,特别是海洋温度的上升,尚不清楚.
研究的目的:
- 为了量化Prochlorococcus细胞分裂率的温度依赖.
- 预测未来海洋变暖对Prochlorococcus生产的影响.
主要方法:
- 使用连续流细胞计 (SeaFlow仪器) 进行长达十年的实地测量的分析.
- 收集大约8000亿个植物浮游生物细胞的每细胞色素光和大小数据.
- 利用全球海洋生态系统模型来模拟未来的生产场景.
主要成果:
- 随着温度高达28°C,Prochlorococcus的分裂速度呈指数级增加,然后急剧下降.
- 预计在中度和高升温情景下,未来的海洋温度将超过这个最佳范围.
- 根据未来的变暖,预计热带海洋的Prochlorococcus产量将减少17-51%.
结论:
- 甲球菌的分裂速度主要取决于温度,具有关键的上限.
- 未来的变暖可能会大大减少Prochlorococcus的生产,影响海洋生态系统.
- 热适应可能不足以减轻温暖对Prochlorococcus的负面影响.
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