Controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions.
One of the largest uncertainties in the terrestrial carbon cycle is the timing and magnitude of soil organic carbon (SOC) response to climate and vegetation change. This uncertainty prevents models from adequately capturing SOC dynamics and challenges the assessment of management and climate change...
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Online Access: | https://doi.org/10.1111/gcb.17320 https://pubmed.ncbi.nlm.nih.gov/38751310 |
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ftpubmed:38751310 2024-06-09T07:50:03+00:00 Controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions. von Fromm, Sophie F Hoyt, Alison M Sierra, Carlos A Georgiou, Katerina Doetterl, Sebastian Trumbore, Susan E 2024 May https://doi.org/10.1111/gcb.17320 https://pubmed.ncbi.nlm.nih.gov/38751310 eng eng Wiley https://doi.org/10.1111/gcb.17320 https://pubmed.ncbi.nlm.nih.gov/38751310 © 2024 The Authors. Global Change Biology published by John Wiley & Sons Ltd. Glob Chang Biol ISSN:1365-2486 Volume:30 Issue:5 climate mass‐preserving spline model benchmarking one‐pool model radiocarbon soil mineralogy tropical soils two‐pool model Journal Article 2024 ftpubmed https://doi.org/10.1111/gcb.17320 2024-05-16T16:03:00Z One of the largest uncertainties in the terrestrial carbon cycle is the timing and magnitude of soil organic carbon (SOC) response to climate and vegetation change. This uncertainty prevents models from adequately capturing SOC dynamics and challenges the assessment of management and climate change effects on soils. Reducing these uncertainties requires simultaneous investigation of factors controlling the amount (SOC abundance) and duration (SOC persistence) of stored C. We present a global synthesis of SOC and radiocarbon profiles (nProfile = 597) to assess the timescales of SOC storage. We use a combination of statistical and depth-resolved compartment models to explore key factors controlling the relationships between SOC abundance and persistence across pedo-climatic regions and with soil depth. This allows us to better understand (i) how SOC abundance and persistence covary across pedo-climatic regions and (ii) how the depth dependence of SOC dynamics relates to climatic and mineralogical controls on SOC abundance and persistence. We show that SOC abundance and persistence are differently related; the controls on these relationships differ substantially between major pedo-climatic regions and soil depth. For example, large amounts of persistent SOC can reflect climatic constraints on soils (e.g., in tundra/polar regions) or mineral absorption, reflected in slower decomposition and vertical transport rates. In contrast, lower SOC abundance can be found with lower SOC persistence (e.g., in highly weathered tropical soils) or higher SOC persistence (e.g., in drier and less productive regions). We relate variable patterns of SOC abundance and persistence to differences in the processes constraining plant C input, microbial decomposition, vertical C transport and mineral SOC stabilization potential. This process-oriented grouping of SOC abundance and persistence provides a valuable benchmark for global C models, highlighting that pedo-climatic boundary conditions are crucial for predicting the effects of climate change and soil management on future C abundance and persistence. Article in Journal/Newspaper Tundra PubMed Central (PMC) Global Change Biology 30 5 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
climate mass‐preserving spline model benchmarking one‐pool model radiocarbon soil mineralogy tropical soils two‐pool model |
spellingShingle |
climate mass‐preserving spline model benchmarking one‐pool model radiocarbon soil mineralogy tropical soils two‐pool model von Fromm, Sophie F Hoyt, Alison M Sierra, Carlos A Georgiou, Katerina Doetterl, Sebastian Trumbore, Susan E Controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions. |
topic_facet |
climate mass‐preserving spline model benchmarking one‐pool model radiocarbon soil mineralogy tropical soils two‐pool model |
description |
One of the largest uncertainties in the terrestrial carbon cycle is the timing and magnitude of soil organic carbon (SOC) response to climate and vegetation change. This uncertainty prevents models from adequately capturing SOC dynamics and challenges the assessment of management and climate change effects on soils. Reducing these uncertainties requires simultaneous investigation of factors controlling the amount (SOC abundance) and duration (SOC persistence) of stored C. We present a global synthesis of SOC and radiocarbon profiles (nProfile = 597) to assess the timescales of SOC storage. We use a combination of statistical and depth-resolved compartment models to explore key factors controlling the relationships between SOC abundance and persistence across pedo-climatic regions and with soil depth. This allows us to better understand (i) how SOC abundance and persistence covary across pedo-climatic regions and (ii) how the depth dependence of SOC dynamics relates to climatic and mineralogical controls on SOC abundance and persistence. We show that SOC abundance and persistence are differently related; the controls on these relationships differ substantially between major pedo-climatic regions and soil depth. For example, large amounts of persistent SOC can reflect climatic constraints on soils (e.g., in tundra/polar regions) or mineral absorption, reflected in slower decomposition and vertical transport rates. In contrast, lower SOC abundance can be found with lower SOC persistence (e.g., in highly weathered tropical soils) or higher SOC persistence (e.g., in drier and less productive regions). We relate variable patterns of SOC abundance and persistence to differences in the processes constraining plant C input, microbial decomposition, vertical C transport and mineral SOC stabilization potential. This process-oriented grouping of SOC abundance and persistence provides a valuable benchmark for global C models, highlighting that pedo-climatic boundary conditions are crucial for predicting the effects of climate change and soil management on future C abundance and persistence. |
format |
Article in Journal/Newspaper |
author |
von Fromm, Sophie F Hoyt, Alison M Sierra, Carlos A Georgiou, Katerina Doetterl, Sebastian Trumbore, Susan E |
author_facet |
von Fromm, Sophie F Hoyt, Alison M Sierra, Carlos A Georgiou, Katerina Doetterl, Sebastian Trumbore, Susan E |
author_sort |
von Fromm, Sophie F |
title |
Controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions. |
title_short |
Controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions. |
title_full |
Controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions. |
title_fullStr |
Controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions. |
title_full_unstemmed |
Controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions. |
title_sort |
controls and relationships of soil organic carbon abundance and persistence vary across pedo-climatic regions. |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1111/gcb.17320 https://pubmed.ncbi.nlm.nih.gov/38751310 |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
Glob Chang Biol ISSN:1365-2486 Volume:30 Issue:5 |
op_relation |
https://doi.org/10.1111/gcb.17320 https://pubmed.ncbi.nlm.nih.gov/38751310 |
op_rights |
© 2024 The Authors. Global Change Biology published by John Wiley & Sons Ltd. |
op_doi |
https://doi.org/10.1111/gcb.17320 |
container_title |
Global Change Biology |
container_volume |
30 |
container_issue |
5 |
_version_ |
1801383023706374144 |