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- Title
Genetic diversity in terrestrial subsurface ecosystems impacted by geological degassing.
- Authors
Bornemann, Till L. V.; Adam, Panagiotis S.; Turzynski, Victoria; Schreiber, Ulrich; Figueroa-Gonzalez, Perla Abigail; Rahlff, Janina; Köster, Daniel; Schmidt, Torsten C.; Schunk, Ralf; Krauthausen, Bernhard; Probst, Alexander J.
- Abstract
Earth's mantle releases 38.7 ± 2.9 Tg/yr CO2 along with other reduced and oxidized gases to the atmosphere shaping microbial metabolism at volcanic sites across the globe, yet little is known about its impact on microbial life under non-thermal conditions. Here, we perform comparative metagenomics coupled to geochemical measurements of deep subsurface fluids from a cold-water geyser driven by mantle degassing. Key organisms belonging to uncultivated Candidatus Altiarchaeum show a global biogeographic pattern and site-specific adaptations shaped by gene loss and inter-kingdom horizontal gene transfer. Comparison of the geyser community to 16 other publicly available deep subsurface sites demonstrate a conservation of chemolithoautotrophic metabolism across sites. In silico replication measures suggest a linear relationship of bacterial replication with ecosystems depth with the exception of impacted sites, which show near surface characteristics. Our results suggest that subsurface ecosystems affected by geological degassing are hotspots for microbial life in the deep biosphere. Geological degassing can impact subsurface metabolism. Here, the authors describe microbial communities from a cold-water geyser are described and compared with other deep subsurface sites, finding a key role for an uncultivated archaeon.
- Subjects
GENETIC variation; BIOSPHERE; HORIZONTAL gene transfer; EARTH'S mantle; MICROBIAL metabolism; MICROORGANISMS
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-27783-7