在过去的冰川周期中,湖泊和海洋环境中的DNA病毒宿主模式
Christiane Boeckel1,2, Simeon Lisovski1, Kathleen R Stoof-Leichsenring1
1Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany.
The ISME journal
|February 19, 2026
概括
来自湖泊和海洋沉积物的古老DNA揭示了长期的病毒社区变化和千年来稳定的病毒与宿主相互作用. 这项研究强调了古代病毒体在理解生态系统对环境变化的反应方面的力量.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 古生物学的古生物学
背景情况:
- 病毒对生态系统功能至关重要,影响着人口动态,生物地化学循环和宿主进化.
- 了解长期的病毒与宿主相互作用是理解生态系统稳定性和对环境变化的反应的关键.
研究的目的:
- 使用沉积式古代DNA (sedaDNA) 重建古代病毒社区及其相互作用.
- 研究长期的生态模式和病毒宿主在湖泊和海洋环境的共同进化,从世到全新世.
主要方法:
- 从西伯利亚湖和亚北极/南极海洋内核中分析沉积式古代DNA (sedaDNA).
- 转基因组测序用于识别病毒类型和重建古代病毒组合.
- 同时发生的相关性分析,以评估病毒与宿主之间的关联以及随时间的稳定性.
主要成果:
- 确定了2084种独特的病毒种群,在湖泊 (Caudoviricetes占主导地位) 和海洋 (Caudoviricetes和Algavirales) 环境中存在着不同的社区.
- 从普世到全新世,观察到病毒群体的组成变化,验证了时间解析重建的 sedaDNA.
- 记录了83个病毒宿主对,揭示了千年来稳定的病毒宿主共同变异,特别是在海洋浮游植物病毒中.
结论:
- 沉积式古代DNA时间序列有效地揭示了古代病毒社区结构和长期生态动态.
- 古老的病毒提供了对生态系统对过去环境变化的具体反应有价值的见解.
- 病毒与宿主相互作用表现出长期的稳定性,在溶解和溶解周期之间可能发生的转变会影响微生物动态.
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