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Title: Does elevated atmospheric CO2 affect soil carbon burial and soil weathering in a forest ecosystem?

Journal Article · · PeerJ
DOI:https://doi.org/10.7717/peerj.5356· OSTI ID:1461935
 [1];  [2];  [3];  [1];  [4];  [5]
  1. Univ. of Illinois, Chicago, IL (United States). Dept. of Biological Sciences and Dept. of Earth and Environmental Sciences
  2. Univ. of Illinois, Chicago, IL (United States). Dept. of Biological Sciences and Dept. of Earth and Environmental Sciences; Skolkovo Inst. of Science and Technology, Moscow (Russia). Space Center
  3. Univ. of Illinois, Chicago, IL (United States). Dept. of Biological Sciences and Dept. of Earth and Environmental Sciences; Univ. of Puerto Rico, Mayaguez (Puerto Rico). Dept. of Agro-environmental Sciences
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Science Division and Climate Change Science Inst.
  5. Univ. of Illinois, Chicago, IL (United States). Dept. of Biological Sciences and Dept. of Earth and Environmental Sciences; Univ. of Delaware, Newark, DE (United States). Dept. of Earth and Environmental Sciences
+ Show Author Affiliations

Most experimental studies measuring the effects of climate change on terrestrial C cycling have focused on processes that occur at relatively short time scales (up to a few years). However, climate-soil C interactions are influenced over much longer time scales by bioturbation and soil weathering affecting soil fertility, ecosystem productivity, and C storage. Elevated CO2 can increase belowground C inputs and stimulate soil biota, potentially affecting bioturbation, and can decrease soil pH which could accelerate soil weathering rates. To determine whether we could resolve any changes in bioturbation or C storage, we investigated soil profiles collected from ambient and elevated-CO2 plots at the Free-Air Carbon-Dioxide Enrichment (FACE) forest site at Oak Ridge National Laboratory after 11 years of 13C-depleted CO2 release. Profiles of organic carbon concentration,δ13C values, and activities of 137Cs,210Pb, and 226Ra were measured to ~30 cm depth in replicated soil cores to evaluate the effects of elevated CO2on these parameters. Bioturbation models based on fitting advection-diffusion equations to137Cs and 210Pb profiles showed that ambient and elevated-CO2plots had indistinguishable ranges of apparent biodiffusion constants, advection rates, and soil mixing times, although apparent biodiffusion constants and advection rates were larger for137Cs than for210Pb as is generally observed in soils. Temporal changes in profiles of δ13C values of soil organic carbon (SOC) suggest that addition of new SOC at depth was occurring at a faster rate than that implied by the net advection term of the bioturbation model. Ratios of (210Pb/226Ra) may indicate apparent soil mixing cells that are consistent with biological mechanisms, possibly earthworms and root proliferation, driving C addition and the mixing of soil between ~4 cm and ~18 cm depth. Lastly, burial of SOC by soil mixing processes could substantially increase the net long-term storage of soil C and should be incorporated in soil-atmosphere interaction models.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; DEB-0919276
OSTI ID:
1461935
Journal Information:
PeerJ, Vol. 6; ISSN 2167-8359
Publisher:
PeerJ Inc.Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

References (56)

Distinct patterns in the diurnal and seasonal variability in four components of soil respiration in a temperate forest under free-air CO 2 enrichment journal January 2011
T HE E FFECTS OF B IOTURBATION ON S OIL P ROCESSES AND S EDIMENT T RANSPORT journal May 2003
Edaphic controls on soil organic carbon stocks in restored grasslands journal August 2015
Soil carbon and nitrogen cycling and storage throughout the soil profile in a sweetgum plantation after 11 years of CO2-enrichment journal March 2012
Strontium-90 on the Earth's Surface journal August 1968
Atmospheric CO 2 enrichment facilitates cation release from soil journal March 2010
Decadal cycling within long-lived carbon pools revealed by dual isotopic analysis of mineral-associated soil organic matter journal November 2011
Effects of long-term drought on the hydrology and growth of a white pine plantation in the southern Appalachians journal March 1994
Increased mercury in forest soils under elevated carbon dioxide journal September 2008
Mechanistic insights on the responses of plant and ecosystem gas exchange to global environmental change: Lessons from Biosphere 2 journal September 2014
Soil burial contributes to deep soil organic carbon storage journal February 2014
Ecosystem-level controls on root-rhizosphere respiration journal April 2013
Elevated atmospheric carbon dioxide increases soil carbon journal December 2005
Using atmospheric fallout to date organic horizon layers and quantify metal dynamics during decomposition journal March 2011
The turnover of carbon pools contributing to soil CO2 and soil respiration in a temperate forest exposed to elevated CO2 concentration journal June 2006
Long-term Effects of Free Air CO2 Enrichment (FACE) on Soil Respiration journal January 2006
Modelling the effects of bioturbation on the re-distribution of 137 Cs in an undisturbed grassland soil journal February 2010
A model for particle-selective transport of tracers in sediments with conveyor belt deposit feeders journal January 1986
137Cs as an indicator of earthworm activity in soils journal September 1998
Mechanisms controlling soil carbon turnover and their potential application for enhancing carbon sequestration journal December 2006
Aggregate formation and carbon sequestration by earthworms in soil from a temperate forest exposed to elevated atmospheric CO2: A microcosm experiment journal January 2014
Can ecosystem services be part of the solution to environmental justice? journal December 2016
Persistence of soil organic matter as an ecosystem property journal October 2011
Impacts of Fine Root Turnover on Forest NPP and Soil C Sequestration Potential journal November 2003
Migration of 137Cs and 90Sr from chernobyl fallout in Ukrainian, Belarussian and Russian soils journal January 1997
Net mineralization of N at deeper soil depths as a potential mechanism for sustained forest production under elevated [CO2]: N MINERALIZATION AT DEPTH IN THE SOIL journal January 2011
Short-term soil mixing quantified with fallout radionuclides journal January 2007
Valuing ecosystems for climate journal February 2012
Elevated CO2, litter chemistry, and decomposition: a synthesis journal April 2001
Sediment mixing and accumulation rate effects on radionuclide depth profiles in Hudson estuary sediments journal January 1981
Downward Movement of Soil Organic Matter and Its Influence on Trace-Element Transport (210Pb, 137Cs) in the Soil journal January 1989
Endogeic earthworm densities increase in response to higher fine-root production in a forest exposed to elevated CO2 journal July 2018
Did elevated atmospheric CO 2 alter soil mineral weathering?: an analysis of 5-year soil water chemistry data at Duke FACE study journal December 2007
Causes of variation in soil carbon simulations from CMIP5 Earth system models and comparison with observations journal January 2013
Modelling the vertical distribution of radionuclides in soil. Part 1: the convection–dispersion equation revisited journal January 2004
New guidelines for reporting stable hydrogen, carbon, and oxygen isotope-ratio data journal September 1996
Tree responses to rising CO 2 in field experiments: implications for the future forest journal June 1999
Breaking ground: Pedological, geological, and ecological implications of soil bioturbation journal December 2009
Stored carbon partly fuels fine-root respiration but is not used for production of new fine roots journal May 2013
Global fallout 137Cs accumulation and vertical migration in selected soils from South Patagonia journal January 2004
Soil CO 2 dynamics, acidification, and chemical weathering in a temperate forest with experimental CO 2 enrichment journal March 2001
CO2 enhancement of forest productivity constrained by limited nitrogen availability journal October 2010
Microbial immobilization and recycling of 137Cs in the organic layers of forest ecosystems: relationship to environmental conditions, humification and invertebrate activity journal December 1994
Lead and cesium transport in european forest soils journal August 1991
Radon fluxes from soils to the atmosphere measured by 210 Pb- 226 Ra disequilibrium in soils journal May 1990
Synthesis and modeling perspectives of rhizosphere priming journal August 2013
Element Pool Changes within a Scrub-Oak Ecosystem after 11 Years of Exposure to Elevated CO2 journal May 2013
Mesoscale variability of vertical profiles of environmental radionuclides (40K, 226Ra, 210Pb and 137Cs) in temperate forest soils in Germany journal March 2004
CO 2 enrichment increases carbon and nitrogen input from fine roots in a deciduous forest journal August 2008
The contentious nature of soil organic matter journal November 2015
Persistence of soil organic matter as an ecosystem property text January 2011
Soil aggregate formation and the accrual of particulate and mineral-associated organic matter journal April 1996
Bioturbation as a mechanism for radionuclide transport in soil: Relevance of earthworms journal January 1996
Transport of fallout radiocesium in the soil by bioturbation: a random walk model and application to a forest soil with a high abundance of earthworms journal July 2002
On the formation of high-latitude soil carbon stocks: Effects of cryoturbation and insulation by organic matter in a land surface model journal January 2009
Quantitative estimates of biological mixing rates in abyssal sediments journal July 1975

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59 BASIC BIOLOGICAL SCIENCES
54 ENVIRONMENTAL SCIENCES
Soil C
Elevated CO2
Isotope
Temperate forest
Bioturbation
cesium-137
lead-210