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The critical role of pore size on depth-dependent microbial cell counts in sediments

Cell counts decrease with sediment depth. Typical explanations consider limiting factors such as water availability and chemistry, carbon source, nutrients, energy and temperature, and overlook the role of pore size. Our analyses consider sediment self-compaction, the evolution of pore size with dep...

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Autores principales: Park, Junghee, Santamarina, J. Carlos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7729949/
https://www.ncbi.nlm.nih.gov/pubmed/33303780
http://dx.doi.org/10.1038/s41598-020-78714-3
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author Park, Junghee
Santamarina, J. Carlos
author_facet Park, Junghee
Santamarina, J. Carlos
author_sort Park, Junghee
collection PubMed
description Cell counts decrease with sediment depth. Typical explanations consider limiting factors such as water availability and chemistry, carbon source, nutrients, energy and temperature, and overlook the role of pore size. Our analyses consider sediment self-compaction, the evolution of pore size with depth, and the probability of pores larger than the microbial size to compute the volume fraction of life-compatible pores. We evaluate cell counts vs. depth profiles gathered at 116 sites worldwide. Results confirm the critical role of pore size on cell counts in the subsurface and explain much of the data spread (from ~ 9 orders of magnitude range in cell counts to ~ 2 orders). Cells colonize pores often forming dense biofilms, thus, cell counts in pores are orders of magnitude higher than in the water column. Similar arguments apply to rocks.
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spelling pubmed-77299492020-12-14 The critical role of pore size on depth-dependent microbial cell counts in sediments Park, Junghee Santamarina, J. Carlos Sci Rep Article Cell counts decrease with sediment depth. Typical explanations consider limiting factors such as water availability and chemistry, carbon source, nutrients, energy and temperature, and overlook the role of pore size. Our analyses consider sediment self-compaction, the evolution of pore size with depth, and the probability of pores larger than the microbial size to compute the volume fraction of life-compatible pores. We evaluate cell counts vs. depth profiles gathered at 116 sites worldwide. Results confirm the critical role of pore size on cell counts in the subsurface and explain much of the data spread (from ~ 9 orders of magnitude range in cell counts to ~ 2 orders). Cells colonize pores often forming dense biofilms, thus, cell counts in pores are orders of magnitude higher than in the water column. Similar arguments apply to rocks. Nature Publishing Group UK 2020-12-10 /pmc/articles/PMC7729949/ /pubmed/33303780 http://dx.doi.org/10.1038/s41598-020-78714-3 Text en © The Author(s) 2020 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Park, Junghee
Santamarina, J. Carlos
The critical role of pore size on depth-dependent microbial cell counts in sediments
title The critical role of pore size on depth-dependent microbial cell counts in sediments
title_full The critical role of pore size on depth-dependent microbial cell counts in sediments
title_fullStr The critical role of pore size on depth-dependent microbial cell counts in sediments
title_full_unstemmed The critical role of pore size on depth-dependent microbial cell counts in sediments
title_short The critical role of pore size on depth-dependent microbial cell counts in sediments
title_sort critical role of pore size on depth-dependent microbial cell counts in sediments
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7729949/
https://www.ncbi.nlm.nih.gov/pubmed/33303780
http://dx.doi.org/10.1038/s41598-020-78714-3
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