全球珊瑚基因学揭示了长久以来的弹性和脆弱性
Claudia Francesca Vaga1,2,3, Andrea M Quattrini4, Isabela Galvão de Lossio E Seiblitz5,6
1Department of Invertebrate Zoology, Smithsonian Institution, Washington, DC, USA. vagac@si.edu.
Nature
|October 22, 2025
概括
岩石珊瑚是珊瑚礁的重要建造者, 起源于4.6亿年前. 它们的进化,包括与藻类的共生,
科学领域:
- 海洋生物学
- 进化生物学
- 古生物学
背景情况:
- 珊瑚礁是全球气候变化所威胁的重要海洋生态系统.
- 了解石珊瑚 (Scleractinia) 的演化历史对于预测它们未来的弹性至关重要.
- 珊瑚和微藻之间的共生对于珊瑚礁的健康至关重要.
研究的目的:
- 通过分子遗传学重建斯克拉克丁珊瑚的深远进化历史.
- 确定珊瑚的起源以及它们与光合作用恐龙的共生.
- 评估过去环境变化对珊瑚谱系的影响,并确定有助于它们生存的因素.
主要方法:
- 进行了时间校准的分子基因分析, 包括数百种新测序的珊瑚类.
- 确定了主要珊瑚系的分离时间和珊瑚藻类共生的起源.
- 推断早期珊瑚的祖先特征和生态偏好.
主要成果:
- 斯克拉克提尼亚最近的共同祖先大约在4.6亿年前出现,很可能是一个孤独的,异质的,自由生活的生物.
- 大约3亿年前,与光合作用菌体的共生形成,大大促进了珊瑚的多样化.
- 光合作生态系容易受到中生代环境破坏的影响,而单独的异质珊瑚则表现出更大的弹性,特别是在深海环境中.
结论:
- 岩石珊瑚有着悠久的进化历史,
- 形成共生的能力刺激了多元化,
- 异质珊瑚表现出通过地质动荡生存的能力, 在当前气候变化中提供一种潜在的生存模式.
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