近日，荷兰乌得勒支大学Appy Sluijs团队研究了始新世早期全球变暖事件中的弹性热带海洋生态系统。相关论文于2026年2月25日发表在《地质学》杂志上。

古新世-始新世极热事件（PETM；距今5600万年）期间的生物响应已有充分记录，但关于早始新世其他幅度较低的短暂性全球变暖事件（极热期）的信息仍十分有限。

研究组分析了东热带大西洋地区六个后PETM极热期（I1、I2、J、K、L1和L2；距今5370万-5200万年）的沟鞭藻囊组合。值得注意的是，研究组未观察到与这些极热事件相关的组合变化，这与同一地点真核生物在PETM期间的消亡现象以及中始新世气候适宜期（约4000万年前）伴随长期变暖出现的有害藻华形成鲜明对比。然而，该研究结果与热带太平洋地区某些幅度较低的极热事件中钙质超微浮游生物组合表现出韧性的观测现象相吻合。研究组得出结论：热带早始新世浮游植物群落对数千年尺度、最高约1.5°C的变暖具有韧性。

附：英文原文

Title: Resilient tropical marine ecosystems during early Eocene global warming events

Author: Chris D. Fokkema, Tobias Agterhuis, Danielle Gerritsma, Peter K. Bijl, Marlow J. Cramwinckel, Appy Sluijs

Issue&Volume: 2026-02-25

Abstract: Biotic response across the PaleoceneEocene Thermal Maximum (PETM; 56 Ma) is well documented, but information for other, lower-magnitude, early Eocene transient global warming events (hyperthermals) is sparse. We studied dinoflagellate cyst assemblages across six post-PETM hyperthermals (I1, I2, J, K, L1, and L2; 53.752.0 Ma) in the eastern tropical Atlantic Ocean. Remarkably, we observe no assemblage changes associated with the hyperthermals, which starkly contrasts the demise of eukaryotes during the PETM and harmful algal blooms associated with long-term warming during the Middle Eocene Climatic Optimum (ca. 40 Ma) at the same site. However, our results mimic observations of resilient calcareous nannoplankton assemblages to certain lower-magnitude hyperthermals in the tropical Pacific. We conclude that tropical early Eocene phytoplankton communities were resilient to multimillennial-scale warming of up to ～1.5 °C.

DOI: 10.1130/G54281.1

Source: https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G54281.1/726832/Resilient-tropical-marine-ecosystems-during-early