Title: Fire effects on the persistence of soil organic matter and long-term carbon storage

Journal Article · · Nature Geoscience

One paradigm in biogeochemistry is that frequent disturbance tends to deplete carbon (C) in soil organic matter (SOM) by reducing biomass inputs and promoting losses. However, disturbance by fire has challenged this paradigm because soil C responses to frequent and/or intense fires are highly variable, despite observed declines in biomass inputs. Here, we review recent advances to illustrate that fire-driven changes in decomposition, mediated by altered SOM stability, are an important compensatory process offsetting declines in aboveground biomass pools. Fire alters the stability of SOM by affecting both the physicochemical properties of the SOM and the environmental drivers of decomposition, potentially offsetting C lost via combustion, but the mechanisms affecting the SOM stability differ across ecosystems. Thus, shifting our focus from a top-down view of fire impacting C cycling via changes in plant biomass to a bottom-up view of changes in decomposition may help to elucidate counterintuitive trends in the response of SOM to burning. Finally, given that 70% of global topsoil C is in fire-prone regions, using fire to promote SOM stability may be an important nature-based climate solution to increase C storage.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
Gatsby Charitable Foundation; Gordon and Betty Moore Foundation; Stanford Woods Institute for the Environment; The Center for Ecosystem Climate Solutions; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1860649
Report Number(s):
LLNL-JRNL-825832; 1039383
Journal Information:
Nature Geoscience, Journal Name: Nature Geoscience Journal Issue: 1 Vol. 15; ISSN 1752-0894
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (120)

Regridded Harmonized World Soil Database v1.2 collection January 2014
Climate, wildfire, and erosion ensemble foretells more sediment in western USA watersheds: Future Fire and Sediment journal September 2017
Repeated fire shifts carbon and nitrogen cycling by changing plant inputs and soil decomposition across ecosystems journal April 2020
Fire regimes approaching historic norms reduce wildfire‐facilitated conversion from forest to non‐forest journal April 2018
Effects of fire on properties of forest soils: a review journal February 2005
Changes in Soil Fungal Communities, Extracellular Enzyme Activities, and Litter Decomposition Across a Fire Chronosequence in Alaskan Boreal Forests journal September 2012
Succession-driven changes in soil respiration following fire in black spruce stands of interior Alaska journal August 2006
How does fire affect the nature and stability of soil organic nitrogen and carbon? A review journal March 2007
The effect of fire on microbial biomass: a meta-analysis of field studies journal August 2011
Forest fires in Canadian permafrost region: the combined effects of fire and permafrost dynamics on soil organic matter quality journal March 2019
Disentangling the impact of AM fungi versus roots on soil structure and water transport journal July 2008
Estimate of organic matter turnover rate in a savanna soil by 13C natural abundance measurements journal January 1990
13C- and 15N-NMR spectroscopic examination of the transformation of organic nitrogen in plant biomass during thermal treatment journal August 1996
Effect of burning and brush treatments on nutrient and soil physical properties in young longleaf pine stands journal December 1994
Prescribed fire-induced changes in properties of sub-boreal forest soils journal April 2003
Stabilization and destabilization of soil organic matter: mechanisms and controls journal November 1996
Effects of fire on soil organic matter in a “cerrado sensu-stricto” from Southeast Brazil as revealed by changes in δ13C journal March 2000
The role of fire and soil heating on water repellency in wildland environments: a review journal May 2000
Review of mechanisms and quantification of priming effects journal October 2000
Burning causes long-term changes in soil organic matter content of a South African grassland journal May 2003
Organic matter changes immediately after a wildfire in an atlantic forest soil and comparison with laboratory soil heating journal January 1997
Role of the soil matrix and minerals in protecting natural organic materials against biological attack journal July 2000
Effects of forest management on soil C and N storage: meta analysis journal January 2001
Mineral–Organic Associations: Formation, Properties, and Relevance in Soil Environments book December 2014
Fire effects in the molecular structure of soil organic matter fractions under Quercus suber cover journal October 2016
Fire effects on soil aggregation: A review journal November 2011
Wildland fire ash: Production, composition and eco-hydro-geomorphic effects journal March 2014
Planting density influence on fibrous root reinforcement of soils journal March 2010
The effect of fire on soil organic matter—a review journal August 2004
Responses of soil carbon, nitrogen and cations to the frequency and seasonality of prescribed burning in a Cape Cod oak-pine forest journal October 2007
A meta-analysis on the response of microbial biomass, dissolved organic matter, respiration, and N mineralization in mineral soil to fire in forest ecosystems journal May 2012
Prescribed fire increases pyrogenic carbon in litter and surface soil in lowland Eucalyptus forests of south-eastern Australia journal April 2016
Vertical distribution and persistence of soil organic carbon in fire-adapted longleaf pine forests journal April 2017
Wildfire effects on soil organic matter quantity and quality in two fire-prone Mediterranean pine forests journal November 2011
Two decades of low-severity prescribed fire increases soil nutrient availability in a Midwestern, USA oak (Quercus) forest journal August 2012
Effect of fires on soil organic carbon pool and mineralization in a Northeastern China wetland journal November 2012
Recovery in fungal biomass is related to decrease in soil organic matter turnover time in a boreal fire chronosequence journal December 2014
Changes in fluxes of carbon dioxide and methane caused by fire in Siberian boreal forest with continuous permafrost journal December 2018
Temperature sensitivity of soil organic matter decomposition after forest fire in Canadian permafrost region journal July 2019
Wildfire effects on water quality in forest catchments: A review with implications for water supply journal January 2011
Historical background and current developments for mapping burned area from satellite Earth observation journal May 2019
Biodegradability of organic matter in fire-affected mineral soils of Southern Spain journal January 2013
Stand age, fire and clearcutting affect soil organic carbon and aggregation of mineral soils in boreal forests journal July 2012
The macromolecular organic composition of plant and microbial residues as inputs to soil organic matter: Fourteen years on journal February 2017
Soil bacterial and fungal response to wildfires in the Canadian boreal forest across a burn severity gradient journal November 2019
A history of research on the link between (micro)aggregates, soil biota, and soil organic matter dynamics journal September 2004
Going underground: root traits as drivers of ecosystem processes journal December 2014
Stabilization mechanisms of soil organic matter: Implications for C-saturation of soils journal January 2002
Chemistry of burning the forest floor during the FROSTFIRE experimental burn, interior Alaska, 1999: CHEMISTRY OF BURNING THE FOREST FLOOR journal August 2004
Controls on black carbon storage in soils: BLACK CARBON IN SOILS journal July 2007
Global burned area and biomass burning emissions from small fires: BURNED AREA FROM SMALL FIRES journal December 2012
Mineral control of soil organic carbon storage and turnover journal September 1997
Persistence of soil organic matter as an ecosystem property journal October 2011
Climate-smart soils journal April 2016
Fire frequency drives decadal changes in soil carbon and nitrogen and ecosystem productivity journal December 2017
Australian climate–carbon cycle feedback reduced by soil black carbon journal November 2008
Anaerobic microsites have an unaccounted role in soil carbon stabilization journal November 2017
Fuel availability not fire weather controls boreal wildfire severity and carbon emissions journal October 2020
Decadal changes in fire frequencies shift tree communities and functional traits journal February 2021
Global fire emissions buffered by the production of pyrogenic carbon journal August 2019
The age distribution of global soil carbon inferred from radiocarbon measurements journal June 2020
Increasing wildfires threaten historic carbon sink of boreal forest soils journal August 2019
The role of soil carbon in natural climate solutions journal March 2020
Vegetation fires in the Anthropocene journal August 2020
Mineral surfaces and soil organic matter journal June 2003
The global carbon sink: a grassland perspective journal February 1998
The role of fire in the boreal carbon budget journal December 2000
Fire impacts on surface heat, moisture and carbon fluxes from a tropical savanna in northern Australia journal January 2003
Effects of fire regimes on herbaceous biomass and nutrient dynamics in the Brazilian savanna journal January 2013
When It's Hot, It's Hot... Or Maybe It's Not! (Surface Flaming May Not Portend Extensive Soil Heating) journal January 1992
Legacy of human-induced C erosion and burial on soil-atmosphere C exchange journal November 2012
Defining pyromes and global syndromes of fire regimes journal April 2013
Natural climate solutions journal October 2017
Global Potential of Soil Carbon Sequestration to Mitigate the Greenhouse Effect journal March 2003
Frequent burning causes large losses of carbon from deep soil layers in a temperate savanna journal February 2020
Forest fire induces short‐term shifts in soil food webs with consequences for carbon cycling journal December 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
Towards a global assessment of pyrogenic carbon from vegetation fires journal July 2015
Low‐intensity frequent fires in coniferous forests transform soil organic matter in ways that may offset ecosystem carbon losses journal May 2021
Boreal forest soil carbon fluxes one year after a wildfire: Effects of burn severity and management journal June 2021
Biochar stability in soil: meta-analysis of decomposition and priming effects journal June 2015
Fire effects on mycorrhizal symbiosis and root system architecture in southern African savanna grasses journal December 2004
Stabilization of organic matter in temperate soils: mechanisms and their relevance under different soil conditions - a review journal August 2006
Interactive effects of wildfire and permafrost on microbial communities and soil processes in an Alaskan black spruce forest journal September 2008
The effect of fire and permafrost interactions on soil carbon accumulation in an upland black spruce ecosystem of interior Alaska: implications for post-thaw carbon loss: PERMAFROST AND FIRE CONTROLS ON SOIL CARBON journal December 2010
Productivity and carbon fluxes of tropical savannas journal March 2006
The global distribution of ecosystems in a world without fire journal November 2004
Plant functional group responses to fire frequency and tree canopy cover gradients in oak savannas and woodlands journal February 2007
Carbon sequestration is related to mycorrhizal fungal community shifts during long-term succession in boreal forests journal December 2014
Belowground community responses to fire: meta-analysis reveals contrasting responses of soil microorganisms and mesofauna journal October 2018
Long-Term Effects of Wildfire on Ecosystem Properties Across an Island Area Gradient journal May 2003
Fire-Derived Charcoal Causes Loss of Forest Humus journal May 2008
Fire in the Earth System journal April 2009
A human-driven decline in global burned area journal June 2017
Climate-driven risks to the climate mitigation potential of forests journal June 2020
Carbon loss from boreal forest wildfires offset by increased dominance of deciduous trees journal April 2021
Intense forest wildfire sharply reduces mineral soil C and N: the first direct evidence journal November 2008
Influence of fire on native nitrogen-fixing plants and soil nitrogen status in ponderosa pine - Douglas-fir forests in western Montana journal February 2000
The Pyrogenic Carbon Cycle journal May 2015
The Ecology of Soil Carbon: Pools, Vulnerabilities, and Biotic and Abiotic Controls journal November 2017
The Effect of Fire, Mowing and Fertilizer Amendment on Arbuscular Mycorrhizas in Tallgrass Prairie journal July 1999
Response of Eucalyptus-Dominated Savanna to Frequent Fires: Lessons from Munmarlary, 1973–1996 journal August 2003
Relationships Among Fires, Fungi, and soil Dynamics in Alaskan Boreal Forests journal December 2004
Charcoal and carbon storage in forest soils of the Rocky Mountain West journal February 2008
Fire effects on temperate forest soil C and N storage journal June 2011
Carbon accumulation and nitrogen pool recovery during transitions from savanna to forest in central Brazil journal February 2014
Forest Fire Effects on Soil Phyllosilicates in California journal January 1996
Response of Surface Horizons in an Oak Forest to Prescribed Burning journal March 2000
Changes in Soil Mineralogy and Texture Caused by Slash-and-Burn Fires in Sumatra, Indonesia journal January 2000
Regridded Harmonized World Soil Database v1.2 collection January 2014
Pyrogenic Carbon in Soils: A Literature-Based Inventory and a Global Estimation of Its Content in Soil Organic Carbon and Stocks journal August 2016
Vulnerability of Physically Protected Soil Organic Carbon to Loss Under Low Severity Fires journal July 2018
The Influence of Fire on the Radiocarbon Signature and Character of Soil Organic Matter in the Siskiyou National Forest, Oregon, USA journal August 2013
Fire Reduces Fungal Species Richness and In Situ Mycorrhizal Colonization: A Meta-Analysis journal August 2017
Frequent burning causes large losses of carbon from deep soil layers in a temperate savanna dataset January 2020
Repeated fire shifts carbon and nitrogen cycling by changing plant inputs and soil decomposition across ecosystems dataset January 2020
Fire-derived organic carbon in soil turns over on a centennial scale journal January 2012
Global Carbon Budget 2020 journal January 2020
Fire effects on temperate forest soil C and N storage collection January 2016
Carbon accumulation and nitrogen pool recovery during transitions from savanna to forest in central Brazil collection January 2016