旧石器时代微生物在泡状火山岩中的分散:3D X射线显微镜揭示的分布、沉降和路径

IF 2.2 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Terra Nova Pub Date : 2023-05-16 DOI:10.1111/ter.12663
Hinrich A. Schmid‐Beurmann, Wolf-Achim Kahl, W. Bach, M. Ivarsson, M. Böttcher, Jörn Peckmann
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引用次数: 0

摘要

格陵兰海Vesteris海山的更新世玄武质岩石显示出一个主要由居住在丰富囊泡中的海洋真菌组成的内石器栖息地,因此代表隐内石器。我们首次证明了3D X射线显微镜可以揭示微生物如何通过囊状岩石进入和迁移。化石组合发生在一组由微裂缝连接的囊泡中。这种微裂缝是海底火山岩中普遍存在的特征,使海洋微生物能够在岩石中扩散。这项研究表明,这种海相火山岩的定植途径是由于熔岩流冷却速率的变化导致的早期拉应力的结果。随后,相互连接的囊泡被岩石微生物填充。这个隐石器时代的栖息地至少从古元古代就存在了。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dispersal of endolithic microorganisms in vesicular volcanic rock: Distribution, settlement and pathways revealed by 3D X‐ray microscopy
Pleistocene basanitic rocks of Vesteris Seamount in the Greenland Sea had been found to exhibit an endolithic habitat largely consisting of marine fungi that dwell within abundant vesicles, therefore representing cryptoendoliths. For the first time, we demonstrate that 3D X‐ray microscopy can unravel how microorganisms access and migrate through vesicular rock. The fossil assemblages occur within a set of vesicles connected by microcracks. Such microcracks, which are ubiquitous features in submarine volcanic rocks, enable the dispersal of marine microorganisms in the rock. This study suggests that this pathway for the colonization of marine volcanic rocks forms in consequence of early tensional stress due to variable rates of cooling of the lava flow. Subsequently, the interconnected vesicles get populated by rock‐dwelling microorganisms. This cryptoendolithic habitat exists at least since the Paleoproterozoic.
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来源期刊
Terra Nova
Terra Nova 地学-地球科学综合
CiteScore
4.80
自引率
8.30%
发文量
59
审稿时长
2.3 months
期刊介绍: Terra Nova publishes short, innovative and provocative papers of interest to a wide readership and covering the broadest spectrum of the Solid Earth and Planetary Sciences. Terra Nova encompasses geology, geophysics and geochemistry, and extends to the fluid envelopes (atmosphere, ocean, environment) whenever coupling with the Solid Earth is involved.
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