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随着时间的推移:测试白纪晚期Trachichthyidae中的温度大小关系
Chloe V Griffiths1,2, James D Witts1, Julie C S Brown2
1Natural History Museum London UK.
Ecology and evolution
|September 29, 2025
概括
全球气温上升正在缩小鱼类的大小. 来自白纪的化石头鱼 (Trachichthyidae) 显示了较小的体型与更高的古代海洋温度相关,支持了这一气候变化预测.
科学领域:
- 古生物学的古生物学
- 气候科学 气候科学
- 鱼类学 鱼类学 鱼类学
背景情况:
- 预计全球气温上升将导致鱼体大小的减少.
- 了解鱼类大小对气候变化的反应至关重要,特别是在商业上重要的物种.
- 居住在深处,繁殖缓慢的头 (Trachichthyidae) 对直接的温度与大小关系研究提出了挑战.
研究的目的:
- 为了研究从白纪晚期的化石粘液头属*Hoplopteryx*中温度与大小的关系.
- 为了确定鱼类的大小是否因较高的古生物学温度而下降.
- 探索其他可能影响鱼体大小的环境因素.
主要方法:
- 来自英国集团的 *Hoplopteryx* 化石记录的分析.
- 从完整和部分化石鱼类遗骸中测量标准长度.
- 使用氧气稳定同位素分析 (δ18O) 估计周围的石灰岩的古气温度.
主要成果:
- 在估计的海水温度和Hoplopteryx lewesiensis*的标准长度之间发现了显著的负相关性.
- 较高的估计温度 (19.5°C27.1°C) 与较小的鱼类大小 (56.3262.6 mm) 相对应.
- 碳稳定同位素值 (δ13C) 也对标准长度进行了负预测,表明了其他环境影响.
结论:
- 这项研究支持了这样一个预测:温度升高导致鱼体大小变小.
- *Hoplopteryx*的化石记录为这种温度-大小关系提供了经验证据.
- 像初级生产率这样的环境因素也可能影响了白纪晚期的鱼体大小.
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