| Autor: |
S. Emil Ruff, Pauline Humez, Isabella Hrabe de Angelis, Michael Nightingale, Muhe Diao, Sara Cho, Liam Connors, Olukayode O. Kuloyo, Alan Seltzer, Samuel Bowman, Scott D. Wankel, Cynthia N. McClain, Bernhard Mayer, Marc Strous |
| Rok vydání: |
2022 |
| DOI: |
10.1101/2022.08.09.503387 |
| Popis: |
Groundwater ecosystems are globally wide-spread yet still poorly understood. We investigated the age, aqueous geochemistry, and microbiology of 138 groundwater samples from 87 monitoring wells (7/mL) than younger ground-waters. Organic carbon-rich strata featured some of the highest abundances, challenging current estimates of global groundwater population sizes. Substantial concentrations of dissolved oxygen (n=57; 0.52±0.12 mg/L [mean±SE]; 0.39 mg/L [median]) in older groundwaters could support aerobic lifestyles in subsurface ecosystems at an unprecedented scale. Metagenomics, oxygen isotope analyses and mixing models indicated that microbial “dark oxygen” contributed to the dissolved oxygen pool in subsurface ecosystems commonly assumed to be anoxic. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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