DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The Deep Soil Organic Carbon Response to Global Change

Journal Article · · Annual Review of Ecology, Evolution, and Systematics
 [1];  [2];  [3];  [4];  [2];  [1];  [5];  [6];  [2]
  1. Dartmouth College, Hanover, NH (United States)
  2. University of California, Merced, CA (United States)
  3. Peking University, Beijing (China)
  4. Seoul National University (South Korea)
  5. University of California, Merced, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  6. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Over 70% of soil organic carbon (SOC) is stored at a depth greater than 20 cm belowground. A portion of this deep SOC actively cycles on annual to decadal timescales and is sensitive to global change. However, deep SOC responses to global change likely differ from surface SOC responses because biotic controls on SOC cycling become weaker as mineral controls predominate with depth. Here, we synthesize the current information on deep SOC responses to the global change drivers of warming, shifting precipitation, elevated CO2, and land use and land cover change. Most deep SOC responses can only be hypothesized because few global change studies measure deep soils, and even fewer global change experiments manipulate deep soils. We call on scientists to incorporate deep soils into their manipulations, measurements, and models so that the response of deep SOC can be accounted for in projections of nature-based climate solutions and terrestrial feedbacks to climate change.

Research Organization:
Dartmouth College, Hanover, NH (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); National Science Foundation Arctic System Science; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344; SC0020228
OSTI ID:
2583367
Report Number(s):
LLNL--JRNL-854334
Journal Information:
Annual Review of Ecology, Evolution, and Systematics, Journal Name: Annual Review of Ecology, Evolution, and Systematics Journal Issue: 1 Vol. 54; ISSN 1543-592X; ISSN 1545-2069
Publisher:
Annual ReviewsCopyright Statement
Country of Publication:
United States
Language:
English

References (209)

Hidden carbon sink beneath desert journal July 2015
Rising Temperature May Trigger Deep Soil Carbon Loss Across Forest Ecosystems journal August 2020
Management of cover crops in temperate climates influences soil organic carbon stocks: a meta‐analysis journal March 2021
Spatial patterns and estimates of global forest litterfall journal February 2019
Differences in soil organic matter between EcM ‐ and AM ‐dominated forests depend on tree and fungal identity journal January 2023
Soil carbon response to long‐term biosolids application journal August 2021
Repeated drying-rewetting cycles and their effects on the emission of CO 2 , N 2 O, NO, and CH 4 in a forest soil journal October 2008
A global analysis of root distributions for terrestrial biomes journal November 1996
Soil oxygen availability and biogeochemistry along rainfall and topographic gradients in upland wet tropical forest soils journal March 1999
The effect of soil drying on humus decomposition and nitrogen availability journal September 1958
The short-term cover crops increase soil labile organic carbon in southeastern Australia journal June 2011
Initial soil organic carbon concentration influences the short-term retention of crop-residue carbon in the fine fraction of a heavy clay soil journal April 2013
Fine Root Growth and Vertical Distribution in Response to Elevated CO2, Warming and Drought in a Mixed Heathland–Grassland journal March 2017
Fine Root and Soil Organic Carbon Depth Distributions are Inversely Related Across Fertility and Rainfall Gradients in Lowland Tropical Forests journal October 2020
Impact of woody encroachment on soil organic carbon and nitrogen in abandoned agricultural lands along a rainfall gradient in Italy journal May 2011
Soil carbon saturation: concept, evidence and evaluation journal August 2007
Distinct fungal and bacterial δ13C signatures as potential drivers of increasing δ13C of soil organic matter with depth journal May 2015
Microbial community mediated response of organic carbon mineralization to labile carbon and nitrogen addition in topsoil and subsoil journal March 2016
Rock weathering controls the potential for soil carbon storage at a continental scale journal November 2021
Minerals limit the deep soil respiration response to warming in a tropical Andisol journal September 2022
The variation of soil microbial respiration with depth in relation to soil carbon composition journal January 2005
Deep soil organic matter—a key but poorly understood component of terrestrial C cycle journal May 2010
Contingency in the direction and mechanics of soil organic matter responses to increased rainfall journal March 2012
Fine root turnover and litter production of Norway spruce in a long-term temperature and nutrient manipulation experiment journal August 2013
How deep is the soil studied – an analysis of four soil science journals journal May 2020
Soil organic matter dynamics: a biological perspective derived from the use of compound-specific isotopes studies journal February 2013
Variations in microbial community composition through two soil depth profiles journal January 2003
Relationship of soil organic matter dynamics to physical protection and tillage journal February 2000
Effects of four ecological categories of earthworms on carbon transfer in soil journal September 1998
Warming and increased precipitation individually influence soil carbon sequestration of Inner Mongolian grasslands, China journal September 2012
Carbon sequestration in agricultural soils via cultivation of cover crops – A meta-analysis journal February 2015
The importance of soil sampling depth for accurate account of soil organic carbon sequestration, storage, retention and loss journal February 2015
Relationships between soil organic carbon and precipitation along a climosequence in loess-derived soils of the Central Great Plains, USA journal October 2015
Organic and inorganic carbon storage in soils along an arid to dry sub-humid climosequence in northwest of Iran journal June 2017
Formation and variation of a 4.5 m deep Oxisol in southeastern Brazil journal November 2021
Erosion, deposition and soil carbon: A review of process-level controls, experimental tools and models to address C cycling in dynamic landscapes journal March 2016
Assessing biome boundary shifts under climate change scenarios in India journal November 2013
A synthesis of change in deep soil organic carbon stores with afforestation of agricultural soils journal May 2013
Mycorrhizal fungi mediation of terrestrial ecosystem responses to global change: mini-review journal August 2014
Soil carbon sequestration to mitigate climate change journal November 2004
Controlling factors for the stability of subsoil carbon in a Dystric Cambisol journal October 2017
Relevance of substrate quality and nutrients for microbial C-turnover in top- and subsoil of a Dystric Cambisol journal September 2017
Factors controlling the variability of organic matter in the top- and subsoil of a sandy Dystric Cambisol under beech forest journal February 2018
Carbon dynamics in surface and deep soil in response to increasing litter addition rates in an agro-ecosystem journal January 2019
Biological soil health indicators respond to tillage intensity: A US meta-analysis journal June 2020
Declines in soil carbon storage under no tillage can be alleviated in the long run journal November 2022
Effect of soil erosion on dissolved organic carbon redistribution in subtropical red soil under rainfall simulation journal December 2014
The effects of compost incorporation on soil physical properties in urban soils – A concise review journal May 2020
Soil moisture and plant residue addition interact in their effect on extracellular enzyme activity journal March 2011
The C:N:P stoichiometry of organisms and ecosystems in a changing world: A review and perspectives journal February 2012
Deforestation impacts on soil organic carbon stocks in the Semiarid Chaco Region, Argentina journal January 2017
Global meta-analysis on the responses of soil extracellular enzyme activities to warming journal February 2020
Contribution of the Fenton reaction and ligninolytic enzymes to soil organic matter mineralisation under anoxic conditions journal March 2021
The effect of soil depth on temperature sensitivity of extracellular enzyme activity decreased with elevation: Evidence from mountain grassland belts journal July 2021
Soil organic carbon response to global environmental change depends on its distribution between mineral-associated and particulate organic matter: A meta-analysis journal November 2021
Full Inversion Tillage (FIT) during pasture renewal as a potential management strategy for enhanced carbon sequestration and storage in Irish grassland soils journal January 2022
Evaluation of long-term carbon sequestration of biochar in soil with biogeochemical field model journal May 2022
Carbon stock stability in drained peatland after simulated plant carbon addition: Strong dependence on deeper soil journal November 2022
Controls on dissolved organic matter leaching from forest litter grown under elevated atmospheric CO2 journal July 2007
Drying and rewetting effects on C and N mineralization and microbial activity in surface and subsurface California grassland soils journal September 2008
The influence of precipitation pulses on soil respiration – Assessing the “Birch effect” by stable carbon isotopes journal October 2010
Drying/rewetting cycles mobilize old C from deep soils from a California annual grassland journal May 2011
Digging deeper to find unique microbial communities: The strong effect of depth on the structure of bacterial and archaeal communities in soil journal July 2012
Microbial community responses to 17 years of altered precipitation are seasonally dependent and coupled to co-varying effects of water content on vegetation and soil C journal September 2013
Impacts of organic matter amendments on carbon and nitrogen dynamics in grassland soils journal January 2014
Investigating the role of moisture as an environmental constraint in the decomposition of shallow and deep mineral soil organic matter of a temperate coniferous soil journal January 2014
Differential priming of soil carbon driven by soil depth and root impacts on carbon availability journal February 2014
Decomposition of particulate organic matter is more sensitive to temperature than the mineral associated organic matter journal March 2014
Relating the biological stability of soil organic matter to energy availability in deep tropical soil profiles journal October 2015
Microbial carbon use efficiency and biomass turnover times depending on soil depth – Implications for carbon cycling journal May 2016
Priming effect increases with depth in a boreal forest soil journal August 2016
Comparing microbial carbon sequestration and priming in the subsoil versus topsoil of a Qinghai-Tibetan alpine grassland journal January 2017
Root exudation patterns in a beech forest: Dependence on soil depth, root morphology, and environment journal April 2017
Soil organic carbon stocks in topsoil and subsoil controlled by parent material, carbon input in the rhizosphere, and microbial-derived compounds journal July 2018
Root penetration in deep soil layers stimulates mineralization of millennia-old organic carbon journal September 2018
Temperature sensitivity of extracellular enzymes differs with peat depth but not with season in an ombrotrophic bog journal October 2018
Root litter decomposition slows with soil depth journal October 2018
Microbial extracellular polysaccharide production and aggregate stability controlled by switchgrass (Panicum virgatum) root biomass and soil water potential journal April 2020
Decreased rhizodeposition, but increased microbial carbon stabilization with soil depth down to 3.6 m journal November 2020
Microbial carbon use efficiency, biomass residence time and temperature sensitivity across ecosystems and soil depths journal March 2021
Plant- or microbial-derived? A review on the molecular composition of stabilized soil organic matter journal May 2021
Active microbial biomass decreases, but microbial growth potential remains similar across soil depth profiles under deeply-vs. shallow-rooted plants journal November 2021
Sequestration of soil carbon by burying it deeper within the profile: A theoretical exploration of three possible mechanisms journal December 2021
Deep-C storage: Biological, chemical and physical strategies to enhance carbon stocks in agricultural subsoils journal July 2022
Reduced tillage as an alternative to no-tillage under Mediterranean conditions: A case study journal July 2014
Matching policy and science: Rationale for the ‘4 per 1000 - soils for food security and climate’ initiative journal May 2019
Climate change consequences on the biome distribution in tropical South America: CLIMATE CHANGE AND BIOME DISTRIBUTION journal May 2007
Carbon delivery to deep mineral horizons in Hawaiian rain forest soils journal January 2011
Representing Nitrogen, Phosphorus, and Carbon Interactions in the E3SM Land Model: Development and Global Benchmarking journal July 2019
The Community Land Model Version 5: Description of New Features, Benchmarking, and Impact of Forcing Uncertainty journal December 2019
CMIP5 Models Predict Rapid and Deep Soil Warming Over the 21st Century journal February 2020
Higher Temperature Sensitivity of Soil C Release to Atmosphere From Northern Permafrost Soils as Indicated by a Meta‐Analysis journal November 2020
Global‐Scale Shifts in Rooting Depths Due To Anthropocene Land Cover Changes Pose Unexamined Consequences for Critical Zone Functioning journal November 2022
Mineral control of soil organic carbon storage and turnover journal September 1997
Temperature sensitivity of soil carbon decomposition and feedbacks to climate change journal March 2006
Stability of organic carbon in deep soil layers controlled by fresh carbon supply journal November 2007
Persistence of soil organic matter as an ecosystem property journal October 2011
Climate-smart soils journal April 2016
The temperature response of soil microbial efficiency and its feedback to climate journal January 2013
Mineral protection of soil carbon counteracted by root exudates journal March 2015
Stability of peatland carbon to rising temperatures journal December 2016
Long-term stabilization of deep soil carbon by fire and burial during early Holocene climate change journal May 2014
Formation of soil organic matter via biochemical and physical pathways of litter mass loss journal September 2015
Soil-carbon response to warming dependent on microbial physiology journal April 2010
The importance of anabolism in microbial control over soil carbon storage journal July 2017
Elevated moisture stimulates carbon loss from mineral soils by releasing protected organic matter journal November 2017
Metabolic capabilities mute positive response to direct and indirect impacts of warming throughout the soil profile journal April 2021
Global stocks and capacity of mineral-associated soil organic carbon journal July 2022
A meta-analysis of 1,119 manipulative experiments on terrestrial carbon-cycling responses to global change journal August 2019
Persistence of dissolved organic matter explained by molecular changes during its passage through soil journal August 2019
The age distribution of global soil carbon inferred from radiocarbon measurements journal June 2020
Persistence of soil organic carbon caused by functional complexity journal July 2020
Mediterranean grassland soil C–N compound turnover is dependent on rainfall and depth, and is mediated by genomically divergent microorganisms journal May 2019
Climate-induced changes in continental-scale soil macroporosity may intensify water cycle journal September 2018
A trade-off between plant and soil carbon storage under elevated CO2 journal March 2021
Mechanisms controlling the impact of multi-year drought on mountain hydrology journal January 2018
Synergy effect of peroxidase enzymes and Fenton reactions greatly increase the anaerobic oxidation of soil organic matter journal July 2020
Cumulative impact of cover crops on soil carbon sequestration and profitability in a temperate humid climate journal August 2020
Divergent responses of soil organic carbon to afforestation journal June 2020
Fine-root production dominates response of a deciduous forest to atmospheric CO2 enrichment journal June 2004
Soil warming, carbon-nitrogen interactions, and forest carbon budgets journal May 2011
Soil carbon debt of 12,000 years of human land use journal August 2017
Natural climate solutions journal October 2017
Hydrologic regulation of plant rooting depth journal September 2017
Changes in Soil Properties and Carbon Content Following Compost Application: Results of On-farm Sampling journal March 2011
Quantifying carbon for agricultural soil management: from the current status toward a global soil information system journal September 2019
Continental-scale patterns of extracellular enzyme activity in the subsoil: an overlooked reservoir of microbial activity journal October 2020
Soil carbon sequestration simulated in CMIP6-LUMIP models: implications for climatic mitigation journal December 2020
Deep in the Sierra Nevada critical zone: saprock represents a large terrestrial organic carbon stock journal December 2021
Fungal community composition and diversity vary with soil depth and landscape position in a no-till wheat-based cropping system journal May 2018
Deep Soil Horizons: Contribution and Importance to Soil Carbon Pools and in Assessing Whole-Ecosystem Response to Management and Global Change journal February 2011
Impacts of Tillage, Slope, and Erosion on Soil Organic Carbon Retention journal November 2010
Advancing the mechanistic understanding of the priming effect on soil organic matter mineralisation journal March 2022
Soil carbon response to woody plant encroachment: importance of spatial heterogeneity and deep soil storage journal April 2017
Plant diversity enhances production and downward transport of biodegradable dissolved organic matter journal November 2020
The Microbial Efficiency-Matrix Stabilization (MEMS) framework integrates plant litter decomposition with soil organic matter stabilization: do labile plant inputs form stable soil organic matter? journal February 2013
Enhanced root exudation stimulates soil nitrogen transformations in a subalpine coniferous forest under experimental warming journal April 2013
Deep ploughing increases agricultural soil organic matter stocks journal June 2016
Conventional intensive logging promotes loss of organic carbon from the mineral soil journal July 2016
Savanna woody encroachment is widespread across three continents journal August 2016
Faster turnover of new soil carbon inputs under increased atmospheric CO 2 journal June 2017
Carbon input by roots into the soil: Quantification of rhizodeposition from root to ecosystem scale journal September 2017
Digging deeper: A holistic perspective of factors affecting soil organic carbon sequestration in agroecosystems journal March 2018
Reduced carbon use efficiency and increased microbial turnover with soil warming journal December 2018
Deep soil flipping increases carbon stocks of New Zealand grasslands journal February 2019
Deep soil inventories reveal that impacts of cover crops and compost on soil carbon sequestration differ in surface and subsurface soils journal August 2019
Conceptualizing soil organic matter into particulate and mineral‐associated forms to address global change in the 21st century journal November 2019
Agricultural acceleration of soil carbonate weathering journal July 2020
30 years of free‐air carbon dioxide enrichment (FACE): What have we learned about future crop productivity and its potential for adaptation? journal November 2020
Lower soil moisture and deep soil temperatures in thermokarst features increase old soil carbon loss after 10 years of experimental permafrost warming journal December 2020
Inactive and inefficient: Warming and drought effect on microbial carbon processing in alpine grassland at depth journal February 2021
Differential effects of altered precipitation regimes on soil carbon cycles in arid versus humid terrestrial ecosystems journal September 2021
Beyond bulk: Density fractions explain heterogeneity in global soil carbon abundance and persistence journal December 2021
A global analysis of soil microbial biomass carbon, nitrogen and phosphorus in terrestrial ecosystems: Global soil microbial biomass C, N and P journal December 2012
Altered root traits due to elevated CO 2 : a meta-analysis : Root traits at elevated CO journal April 2013
The vertical distribution and control of microbial necromass carbon in forest soils journal July 2020
Stabilization of organic matter in temperate soils: mechanisms and their relevance under different soil conditions - a review journal August 2006
Carbon dynamics in topsoil and in subsoil may be controlled by different regulatory mechanisms: CARBON DYNAMICS IN TOPSOIL AND IN SUBSOIL journal January 2010
Carbon accumulation in agricultural soils after afforestation: a meta-analysis: SOC ACCUMULATION FOLLOWING AFFORESTATION journal January 2010
Experimental evidence for the attenuating effect of SOM protection on temperature sensitivity of SOM decomposition: SOM PROTECTION AS ATTENUATING FACTOR OF Q10 journal August 2010
Temperature and soil organic matter decomposition rates - synthesis of current knowledge and a way forward journal August 2011
The Michaelis-Menten kinetics of soil extracellular enzymes in response to temperature: a cross-latitudinal study journal January 2012
Thermal adaptation of soil microbial respiration to elevated temperature journal December 2008
Enhanced root exudation induces microbial feedbacks to N cycling in a pine forest under long-term CO2 fumigation: Rhizosphere feedbacks in CO2-enriched forests journal December 2010
A meta-analysis of mycorrhizal responses to nitrogen, phosphorus, and atmospheric CO2 in field studies journal July 2004
Fine-root turnover patterns and their relationship to root diameter and soil depth in a 14 C-labeled hardwood forest journal November 2006
CO 2 enrichment increases carbon and nitrogen input from fine roots in a deciduous forest journal August 2008
Seven years of carbon dioxide enrichment, nitrogen fertilization and plant diversity influence arbuscular mycorrhizal fungi in a grassland ecosystem journal June 2011
Cumulative response of ecosystem carbon and nitrogen stocks to chronic CO 2 exposure in a subtropical oak woodland journal May 2013
Synthesis and modeling perspectives of rhizosphere priming journal August 2013
Evidence for the primacy of living root inputs, not root or shoot litter, in forming soil organic carbon journal August 2018
Root effects on soil organic carbon: a double‐edged sword journal December 2020
Plant sizes and shapes above and belowground and their interactions with climate journal March 2022
Temperature sensitivity of SOM decomposition governed by aggregate protection and microbial communities journal July 2019
Five years of whole-soil warming led to loss of subsoil carbon stocks and increased CO 2 efflux journal May 2021
The whole-soil carbon flux in response to warming journal March 2017
The Effects of Soil Depth on the Structure of Microbial Communities in Agricultural Soils in Iowa (United States) journal January 2021
Mechanisms for soil moisture effects on activity of nitrifying bacteria. journal January 1995
Bacterial Secondary Metabolite Biosynthetic Potential in Soil Varies with Phylum, Depth, and Vegetation Type journal June 2020
Ecological and Genomic Attributes of Novel Bacterial Taxa That Thrive in Subsurface Soil Horizons journal October 2019
The Ecology of Soil Carbon: Pools, Vulnerabilities, and Biotic and Abiotic Controls journal November 2017
Light and Heavy Fractions of Soil Organic Matter in Response to Climate Warming and Increased Precipitation in a Temperate Steppe journal March 2012
Winter cover crops increase readily decomposable soil carbon, but compost drives total soil carbon during eight years of intensive, organic vegetable production in California journal February 2020
Manipulation of Snow in Small Headwater Catchments at Storgama, Norway: Effects on Leaching of Total Organic Carbon and Total Organic Nitrogen journal February 2008
Consequences of More Extreme Precipitation Regimes for Terrestrial Ecosystems journal October 2008
Microbial Nitrogen Limitation Increases Decomposition journal August 2007
The Vertical Distribution of soil Organic Carbon and its Relation to Climate and Vegetation journal April 2000
Effects of organic matter amendments on net primary productivity and greenhouse gas emissions in annual grasslands journal January 2013
Soil Warming and Carbon Loss from a Lake States Spodosol journal January 1999
Mineral Assemblage and Aggregates Control Carbon Dynamics in a California Conifer Forest journal January 2005
Afforestation Effects on Soil Carbon Storage in the United States: A Synthesis journal January 2013
How Deep Is Soil? journal October 1995
Inorganic Carbon Leaching From a Warmed and Irrigated Carbonate Forest Soil journal August 2019
The Response Patterns of Arbuscular Mycorrhizal and Ectomycorrhizal Symbionts Under Elevated CO2: A Meta-Analysis journal June 2018
Restoring Soil Fertility on Degraded Lands to Meet Food, Fuel, and Climate Security Needs via Perennialization journal October 2021
Trends in Microbial Community Composition and Function by Soil Depth journal February 2022
Is There Anybody Out There? Substrate Availability Controls Microbial Activity outside of Hotspots in Subsoils journal June 2018
Effect of subsoiling and injection of pelletized organic matter on soil quality and productivity journal January 2012
Organic carbon and nitrogen stocks in a clay loam soil 10 years after a single compost application journal August 2014
Storage and stability of organic carbon in soils as related to depth, occlusion within aggregates, and attachment to minerals journal January 2013
Changes in soil organic carbon storage predicted by Earth system models during the 21st century journal January 2014
Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps journal January 2014
Multiple soil nutrient competition between plants, microbes, and mineral surfaces: model development, parameterization, and example applications in several tropical forests journal January 2016
Attaining whole-ecosystem warming using air and deep-soil heating methods with an elevated CO 2 atmosphere journal January 2017
On the role of soil water retention characteristic on aerobic microbial respiration journal January 2019
Deepening roots can enhance carbonate weathering by amplifying CO2-rich recharge journal January 2021
An open-source database for the synthesis of soil radiocarbon data: International Soil Radiocarbon Database (ISRaD) version 1.0 journal January 2020
Proteogenomic analyses indicate bacterial methylotrophy and archaeal heterotrophy are prevalent below the grass root zone journal January 2016
Higher carbon sequestration potential and stability for deep soil compared to surface soil regardless of nitrogen addition in a subtropical forest journal May 2020