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Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield
The deep terrestrial biosphere encompasses the life below the photosynthesis-fueled surface that perseveres in typically nutrient and energy depleted anoxic groundwaters. The composition and cycling of this vast dissolved organic matter (DOM) reservoir relevant to the global carbon cycle remains to...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9385861/ https://www.ncbi.nlm.nih.gov/pubmed/35977924 http://dx.doi.org/10.1038/s41467-022-32457-z |
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author | Osterholz, Helena Turner, Stephanie Alakangas, Linda J. Tullborg, Eva-Lena Dittmar, Thorsten Kalinowski, Birgitta E. Dopson, Mark |
author_facet | Osterholz, Helena Turner, Stephanie Alakangas, Linda J. Tullborg, Eva-Lena Dittmar, Thorsten Kalinowski, Birgitta E. Dopson, Mark |
author_sort | Osterholz, Helena |
collection | PubMed |
description | The deep terrestrial biosphere encompasses the life below the photosynthesis-fueled surface that perseveres in typically nutrient and energy depleted anoxic groundwaters. The composition and cycling of this vast dissolved organic matter (DOM) reservoir relevant to the global carbon cycle remains to be deciphered. Here we show that recent Baltic Sea-influenced to ancient pre-Holocene saline Fennoscandian Shield deep bedrock fracture waters carried DOM with a strong terrigenous signature and varying contributions from abiotic and biotic processes. Removal of easily degraded carbon at the surface-to-groundwater transition and corresponding microbial community assembly processes likely resulted in the highly similar DOM signatures across the notably different water types that selected for a core microbiome. In combination with the aliphatic character, depleted δ(13)C signatures in DOM indicated recent microbial production in the oldest, saline groundwater. Our study revealed the persistence of terrestrially-sourced carbon in severely energy limited deep continental groundwaters supporting deep microbial life. |
format | Online Article Text |
id | pubmed-9385861 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-93858612022-08-19 Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield Osterholz, Helena Turner, Stephanie Alakangas, Linda J. Tullborg, Eva-Lena Dittmar, Thorsten Kalinowski, Birgitta E. Dopson, Mark Nat Commun Article The deep terrestrial biosphere encompasses the life below the photosynthesis-fueled surface that perseveres in typically nutrient and energy depleted anoxic groundwaters. The composition and cycling of this vast dissolved organic matter (DOM) reservoir relevant to the global carbon cycle remains to be deciphered. Here we show that recent Baltic Sea-influenced to ancient pre-Holocene saline Fennoscandian Shield deep bedrock fracture waters carried DOM with a strong terrigenous signature and varying contributions from abiotic and biotic processes. Removal of easily degraded carbon at the surface-to-groundwater transition and corresponding microbial community assembly processes likely resulted in the highly similar DOM signatures across the notably different water types that selected for a core microbiome. In combination with the aliphatic character, depleted δ(13)C signatures in DOM indicated recent microbial production in the oldest, saline groundwater. Our study revealed the persistence of terrestrially-sourced carbon in severely energy limited deep continental groundwaters supporting deep microbial life. Nature Publishing Group UK 2022-08-17 /pmc/articles/PMC9385861/ /pubmed/35977924 http://dx.doi.org/10.1038/s41467-022-32457-z Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Osterholz, Helena Turner, Stephanie Alakangas, Linda J. Tullborg, Eva-Lena Dittmar, Thorsten Kalinowski, Birgitta E. Dopson, Mark Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield |
title | Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield |
title_full | Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield |
title_fullStr | Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield |
title_full_unstemmed | Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield |
title_short | Terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the Fennoscandian Shield |
title_sort | terrigenous dissolved organic matter persists in the energy-limited deep groundwaters of the fennoscandian shield |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9385861/ https://www.ncbi.nlm.nih.gov/pubmed/35977924 http://dx.doi.org/10.1038/s41467-022-32457-z |
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