Mapping soil microbial residence time at the global scale
Abstract Soil microbes are the fundamental engine for carbon (C) cycling. Microbial residence time (MRT) therefore determines the mineralization of soil organic C, releasing C as heterotrophic respiration and contributing substantially to the C efflux in terrestrial ecosystems. We took use of a comp...
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crwiley:10.1111/gcb.15864 2024-06-23T07:50:31+00:00 Mapping soil microbial residence time at the global scale He, Liyuan Xu, Xiaofeng San Diego State University 2021 http://dx.doi.org/10.1111/gcb.15864 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15864 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15864 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 27, issue 24, page 6484-6497 ISSN 1354-1013 1365-2486 journal-article 2021 crwiley https://doi.org/10.1111/gcb.15864 2024-06-04T06:38:08Z Abstract Soil microbes are the fundamental engine for carbon (C) cycling. Microbial residence time (MRT) therefore determines the mineralization of soil organic C, releasing C as heterotrophic respiration and contributing substantially to the C efflux in terrestrial ecosystems. We took use of a comprehensive dataset (2627 data points) and calculated the MRT based on the basal respiration and microbial biomass C. Large variations in MRT were found among biomes, with the largest MRT in boreal forests and grasslands and smallest in natural wetlands. Biogeographic patterns of MRT were found along climate variables (temperature and precipitation), vegetation variables (root C density and net primary productivity), and edaphic factors (soil texture, pH, topsoil porosity, soil C, and total nitrogen). Among environmental factors, edaphic properties dominate the MRT variations. We further mapped the MRT at the global scale with an empirical model. The simulated and observed MRT were highly consistent at plot‐ ( R 2 = .86), site‐ ( R 2 = .88), and biome‐ ( R 2 = .99) levels. The global average of MRT was estimated to be 38 (±5) days. A clear latitudinal biogeographic pattern was found for MRT with lower values in tropical regions and higher values in the Arctic. The biome‐ and global‐level estimates of MRT serve as valuable data for parameterizing and benchmarking microbial models. Article in Journal/Newspaper Arctic Wiley Online Library Arctic Global Change Biology 27 24 6484 6497 |
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English |
description |
Abstract Soil microbes are the fundamental engine for carbon (C) cycling. Microbial residence time (MRT) therefore determines the mineralization of soil organic C, releasing C as heterotrophic respiration and contributing substantially to the C efflux in terrestrial ecosystems. We took use of a comprehensive dataset (2627 data points) and calculated the MRT based on the basal respiration and microbial biomass C. Large variations in MRT were found among biomes, with the largest MRT in boreal forests and grasslands and smallest in natural wetlands. Biogeographic patterns of MRT were found along climate variables (temperature and precipitation), vegetation variables (root C density and net primary productivity), and edaphic factors (soil texture, pH, topsoil porosity, soil C, and total nitrogen). Among environmental factors, edaphic properties dominate the MRT variations. We further mapped the MRT at the global scale with an empirical model. The simulated and observed MRT were highly consistent at plot‐ ( R 2 = .86), site‐ ( R 2 = .88), and biome‐ ( R 2 = .99) levels. The global average of MRT was estimated to be 38 (±5) days. A clear latitudinal biogeographic pattern was found for MRT with lower values in tropical regions and higher values in the Arctic. The biome‐ and global‐level estimates of MRT serve as valuable data for parameterizing and benchmarking microbial models. |
author2 |
San Diego State University |
format |
Article in Journal/Newspaper |
author |
He, Liyuan Xu, Xiaofeng |
spellingShingle |
He, Liyuan Xu, Xiaofeng Mapping soil microbial residence time at the global scale |
author_facet |
He, Liyuan Xu, Xiaofeng |
author_sort |
He, Liyuan |
title |
Mapping soil microbial residence time at the global scale |
title_short |
Mapping soil microbial residence time at the global scale |
title_full |
Mapping soil microbial residence time at the global scale |
title_fullStr |
Mapping soil microbial residence time at the global scale |
title_full_unstemmed |
Mapping soil microbial residence time at the global scale |
title_sort |
mapping soil microbial residence time at the global scale |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/gcb.15864 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15864 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15864 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Global Change Biology volume 27, issue 24, page 6484-6497 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.15864 |
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Global Change Biology |
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27 |
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24 |
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6484 |
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6497 |
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1802641428023607296 |