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原文連結
論文資訊
- 類型：已發表論文
- 日期：2025-05-02
摘要
Body size greatly affects how organisms interact with their environments. However, the macro演化ary patterns of body size across many major metazoan clades and their constraining mechanisms remain elusive. A new high-resolution body size dataset covering 2435 物種 from 1091 genera of Cambrian and Ordovician trilobites reveals that body size 演化 changes episodically, with three marked reductions in size. Such a pattern rules out a persistent Cope's rule dynamic. Rather, we find a strong temporal link between body size changes and major fluctuations in 海洋 redox, supporting the hypothesis that 海洋 oxygen levels exerted a primary control on the tempo and mode of trilobite body size 演化. These further imply a dominant role for 海洋 oxygen in early animal 演化.
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