生理学和气候变化解释了在波斯纪末期大规模灭绝后,海洋社区之间异常高的相似性
Jood A Al Aswad1, Justin L Penn2, Pedro M Monarrez1,3
1Department of Earth and Planetary Sciences, Stanford University, 450 Jane Stanford Way, Stanford, CA 94305, USA.
Science advances
|March 26, 2025
概括
在波斯末期的大规模灭绝之后,全球海洋无脊椎动物群落变得更加相似. 这种生物同质化是由幸存者寻求有足够氧气的息地驱动的,这表明里亚纪早期海洋生物的生理限制.
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:
- 波斯纪末期的大规模灭绝 (大约2.52亿年前) 导致化石集合的分类学特征在全球范围内丧失.
- 这种灭绝后生物同质化背后的驱动因素仍然不太清楚.
- 海洋无脊椎动物面临着重大的环境变化,包括氧气供应的潜在变化.
研究的目的:
- 调查生物同质化是否受到热带幸存者适应扩大适合息地的影响.
- 评估环境氧气供应与代谢需求在塑造海洋无脊椎动物生物地理中的作用.
- 将化石社区的相似性与生态生理学模型预测进行比较.
主要方法:
- 在海洋无脊椎动物化石群落 (双动物和类动物) 中检查了空间相似性.
- 开发了一种生态生理模型,根据氧气供应和代谢需求来预测合适的海洋息地.
- 将化石数据与不同气候变化场景下的模型预测进行比较.
主要成果:
- 化石组合显示,灭绝后的分类学特征在全球范围内减少.
- 生态生理学模型预测了适合海洋无脊椎动物的有氧息地的扩张.
- 对气候变化的模拟生物地理反应表明,在幸存的生态生理型中,全球社区的相似性增加了.
结论:
- 波斯末期灭绝后的生物同质化可以通过幸存者追踪扩大氧化息地来解释.
- 生理上的约束,特别是有氧的要求,在早期的三叠纪海洋生物地理学中发挥了重要作用.
- 这项研究强调了生态生理学的重要性,以了解大规模灭绝后的宏观进化模式.
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