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| DOI | 10.1038/s41561-022-00968-5 |
| Carbon fixation rates in groundwater similar to those in oligotrophic marine systems | |
| Overholt W.A.; Trumbore S.; Xu X.; Bornemann T.L.V.; Probst A.J.; Krüger M.; Herrmann M.; Thamdrup B.; Bristow L.A.; Taubert M.; Schwab V.F.; Hölzer M.; Marz M.; Küsel K. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 561 |
| 结束页码 | 567 |
| 卷号 | 15期号:7 |
| 英文摘要 | The terrestrial subsurface contains nearly all of Earth’s freshwater reserves and harbours the majority of our planet’s total prokaryotic biomass. Although genetic surveys suggest these organisms rely on in situ carbon fixation, rather than the photosynthetically derived organic carbon transported from surface environments, direct measurements of carbon fixation in the subsurface are absent. Using an ultra-low level 14C-labelling technique, we estimate in situ carbon fixation rates in a carbonate aquifer. We find these rates are similar to those measured in oligotrophic marine surface waters and up to six-fold greater than those observed in the lower euphotic zone. Our empirical carbon fixation rates agree with nitrification rate data. Metagenomic analyses reveal abundant putative chemolithoautotrophic members of an uncharacterized order of Nitrospiria that may be behind the carbon fixation. On the basis of our determined carbon fixation rates, we conservatively extrapolate global primary production in carbonate groundwaters (10% of global reserves) to be 0.11 Pg carbon per year. These rates fall within the range found for oligotrophic marine surface waters, indicating a substantial contribution of in situ primary production to subsurface ecosystem processes. We further suggest that, just as phototrophs are for marine biogeochemical cycling, such subsurface carbon fixation is potentially foundational to subsurface trophic webs. © 2022, The Author(s). |
| 语种 | 英语 |
| scopus关键词 | carbon fixation; freshwater; groundwater; marine environment; nitrification; oligotrophic environment; primary production; prokaryote |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262172 |
| 作者单位 | Aquatic Geomicrobiology, Institute of Biodiversity, Friedrich Schiller University, Jena, Germany |
| 推荐引用方式 GB/T 7714 | Overholt W.A.； Trumbore S.； Xu X.； Bornemann T.L.V.； Probst A.J.； Krüger M.； Herrmann M.； Thamdrup B.； Bristow L.A.； Taubert M.； Schwab V.F.； Hölzer M.； Marz M.； Küsel K.. Carbon fixation rates in groundwater similar to those in oligotrophic marine systems[J],2022,15(7). |
| APA | Overholt W.A.； Trumbore S.； Xu X.； Bornemann T.L.V.； Probst A.J.； Krüger M.； Herrmann M.； Thamdrup B.； Bristow L.A.； Taubert M.； Schwab V.F.； Hölzer M.； Marz M.； Küsel K..(2022).Carbon fixation rates in groundwater similar to those in oligotrophic marine systems.Nature Geoscience,15(7). |
| MLA | Overholt W.A.； Trumbore S.； Xu X.； Bornemann T.L.V.； Probst A.J.； Krüger M.； Herrmann M.； Thamdrup B.； Bristow L.A.； Taubert M.； Schwab V.F.； Hölzer M.； Marz M.； Küsel K.."Carbon fixation rates in groundwater similar to those in oligotrophic marine systems".Nature Geoscience 15.7(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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