ArticleMicrobial ecology2015
Heterotrophic communities supplied by ancient organic carbon predominate in deep fennoscandian bedrock fluids.
Article in Microbial ecology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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Who cites it
27 citing papers in PubMed, 65 citations in OpenAlex.
- Ecological Processes Underpinning Microbial Variability in Archean Granitoids Beneath the Deccan Traps: Evidence From Deep Drilling in Koyna, India.Environmental microbiology reports · 2026Article
- Deep subsurface rock-hosted chemolithotrophic bacterial communities exhibited differential COScientific reports · 2026Article
- A global deep terrestrial biosphere core microbiome.ISME communications · 2025Article
- Microbial ecology of subsurface granitic bedrock: a humid-arid site comparison in Chile.ISME communications · 2025Article
- Radiolytic support for oxidative metabolism in an ancient subsurface brine system.ISME communications · 2024Article
- Mineral Indicators of Geologically Recent Past Habitability on Mars.Life (Basel, Switzerland) · 2023Article
- Radiolytically reworked Archean organic matter in a habitable deep ancient high-temperature brine.Nature communications · 2023Article
- Implications of a short carbon pulse on biofilm formation on mica schist in microcosms with deep crystalline bedrock groundwater.Frontiers in microbiology · 2023Article
- Depth wide distribution and metabolic potential of chemolithoautotrophic microorganisms reactivated from deep continental granitic crust underneath the Deccan Traps at Koyna, India.Frontiers in microbiology · 2022Article
- Epilithic Microbial Community Functionality in Deep Oligotrophic Continental Bedrock.Frontiers in microbiology · 2022Article
- Advances in Defining Ecosystem Functions of the Terrestrial Subsurface Biosphere.Frontiers in microbiology · 2022Review
- Ultradeep Microbial Communities at 4.4 km within Crystalline Bedrock: Implications for Habitability in a Planetary Context.Life (Basel, Switzerland) · 2020Article
- Paleo-Rock-Hosted Life on Earth and the Search on Mars: A Review and Strategy for Exploration.Astrobiology · 2019Review
- Archaeal Communities in Deep Terrestrial Subsurface Underneath the Deccan Traps, India.Frontiers in microbiology · 2019Article
- Exploration of deep terrestrial subsurface microbiome in Late Cretaceous Deccan traps and underlying Archean basement, India.Scientific reports · 2018Article
- Investigation of viable taxa in the deep terrestrial biosphere suggests high rates of nutrient recycling.FEMS microbiology ecology · 2018Article
- Depth and Dissolved Organic Carbon Shape Microbial Communities in Surface Influenced but Not Ancient Saline Terrestrial Aquifers.Frontiers in microbiology · 2018Article
- Biogeochemical Cycling by a Low-Diversity Microbial Community in Deep Groundwater.Frontiers in microbiology · 2018Article
- Article
- Response of Deep Subsurface Microbial Community to Different Carbon Sources and Electron Acceptors during ∼2 months Incubation in Microcosms.Frontiers in microbiology · 2017Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The deep subsurface hosts diverse life, but the mechanisms that sustain this diversity remain elusive. Here, we studied microbial communities involved in carbon cycling in deep, dark biosphere and identified anaerobic microbial energy production mechanisms from groundwater of Fennoscandian crystalline bedrock sampled from a deep drill hole in Outokumpu, Finland, by using molecular biological analyses. Carbon cycling pathways, such as carbon assimilation, methane production and methane consumption, were studied with cbbM, rbcL, acsB, accC, mcrA and pmoA marker genes, respectively. Energy sources, i.e. the terminal electron accepting processes of sulphate-reducing and nitrate-reducing communities, were assessed with detection of marker genes dsrB and narG, respectively. While organic carbon is scarce in deep subsurface, the main carbon source for microbes has been hypothesized to be inorganic carbon dioxide. However, our results demonstrate that carbon assimilation is performed throughout the Outokumpu deep scientific drill hole water column by mainly heterotrophic microorganisms such as Clostridia. The source of carbon for the heterotrophic microbial metabolism is likely the Outokumpu bedrock, mainly composed of serpentinites and metasediments with black schist interlayers. In addition to organotrophic metabolism, nitrate and sulphate are other possible energy sources. Methanogenic and methanotrophic microorganisms are scarce, but our analyses suggest that the Outokumpu deep biosphere provides niches for these organisms; however, they are not very abundant.
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