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放射性动物对气候变化和在古生代-中生代过渡期间的大规模灭绝没有一致的尺寸反应
Yifan Xiao1, Kaiyue Wang1, Weihong He1
1State Key Laboratory of Geomicrobiology and Environmental Changes, School of Earth Science, China University of Geosciences, Wuhan 430074, China.
Current biology : CB
|July 24, 2025
概括
在二叠纪-三叠纪大灭绝期间,浮游生物的尺寸变化有所不同. 虽然一些放射性星球缩小了,但其他星球在度和海洋条件的影响下增长了,为现代浮游生物的反应提供了洞察力.
科学领域:
- 古生物学的古生物学
- 海洋生物学 海洋生物学
- 气候科学 气候科学
背景情况:
- 浮游生物是海洋健康的重要指标.
- 浮游生物对大规模灭绝的形态反应还没有得到充分研究.
- 放射菌是过去初级生产力的关键浮游生物指标.
研究的目的:
- 通过瓜达卢皮亚 - 洛宾吉亚灭绝 (GLE) 和珀米亚 - 特里亚斯大灭绝 (PTME) 调查Radiolaria的形态尺寸变化.
- 分析海洋变暖和扰乱条件对放射性大小的影响.
- 了解辐射大小变化的地理和时间变化.
主要方法:
- 分析了大数据库中期珀米纪到中期特里亚斯纪的Radiolaria.
- 检查两个主要大规模灭绝事件 (GLE和PTME) 的规模趋势.
- 尺寸变化与同位素和海水温度的相关性.
主要成果:
- 在GLE期间发生了显著的放射性尺寸缩小.
- 在PTME期间,深水分类 (Albaillellaria, Latentifistularia) 的规模减少,浅水分类 (Entactinaria, Spumellaria) 的规模增加.
- 观察到的地理差异:低度形式的大小减少,高度形式增加,与初级生产率相关.
结论:
- 对大规模灭绝的放射性大小反应是复杂的,并且根据血统和度而异.
- 尺寸变化与海洋温度和大陆气候 (Sr同位素) 相相关.
- 这些发现为预测现代浮游生物对气候变化的生态反应提供了洞察力.
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