在北美白时代 - 古世大灭绝前后的真菌繁殖
Rosanna P Baker1, Arturo Casadevall1
1Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA.
bioRxiv : the preprint server for biology
|December 19, 2025
概括
菌在白时代-古世灭绝事件后在全球范围内繁殖,类似于过去的全球灾难. 在北美发现的这种冲击后的真菌繁殖表明,在生态系统崩后,真菌会壮成长,影响物种的恢复.
科学领域:
- 古生物学的古生物学
- 古生态学 古生态学
- 地质地质地质地质地质地
背景情况:
- 遗传学证据表明,真菌繁殖之后发生了重大全球灭绝事件,包括珀米亚-特里亚斯纪和白纪-古世 (K/Pg).
- 以前的证据表明,K/Pg后的真菌繁殖仅限于新西兰的一个地点.
- 在其他生态系统层面的崩之后,已经观察到真菌繁殖.
研究的目的:
- 调查K/Pg灭绝事件后北美真菌繁殖的证据.
- 为了确定K/Pg后的真菌繁殖是否是一个全球现象.
- 分析撞击前的真菌数量及其与环境变化的相关性.
主要方法:
- 来自科罗拉多州丹佛盆地K/Pg边界段的古生物学样本的分析.
- 地质层的年代测定,以确定时间相关性.
- 结果与其他K/Pg地点和地质事件的现有数据进行比较.
主要成果:
- 在丹佛盆地地点的奇克苏鲁布撞击后立即检测到真菌丰富性的显著升.
- 这一北美发现证实了新西兰的证据,支持K/Pg后的全球真菌繁殖.
- 在撞击前的白纪晚期发现了一个长期的高真菌丰富期,与气候冷却和Deccan Traps Poladpur阶段有关.
结论:
- 在全球生态系统崩后,真菌表现出繁荣的能力.
- 在K/Pg灭绝事件之后,全球真菌繁殖,这是过去其他重大灾难后观察到的现象.
- 由于真菌的病原性潜力,真菌繁殖事件对灾难后的植物和动物物种的恢复有重大影响.
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