Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Decadal carbon decomposition dynamics in three peatlands in Northern Minnesota

Journal Article · · Biogeochemistry
 [1];  [2];  [3];  [1]
  1. Whittier College, CA (United States)
  2. Univ. of Minnesota, St. Paul, MN (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The uppermost portion of the peat profile, an area of active diagenetic processes, is exceedingly important for understanding peatland dynamics and the diagenesis and geochemistry of atmospherically-deposited materials. In this study, we investigated high resolution carbon (C) accrual and peat decomposition rates at two Sphagnum-rich ombrotrophic bogs and one fen in northern Minnesota, USA by analyzing 1 cm increments from 30 cm thick intact frozen blocks of peat soil. We conducted radiocarbon analysis of Sphagnum cellulose to determine peat age and net C accumulation at each depth interval. Calibrated peat ages were determined using CALIBomb and a compilation of calibration datasets for the pre-bomb period. We fit data with a negative exponential accumulation model and used model-derived parameters to estimate net primary productivity (NPP) and a peat decomposition rate constant k. FTIR spectroscopy and C:N were used to derive humification indices and to chemically characterize the peat. NPP ranged from 180 to 266 g C m-2 year-1, k ranged from 0.015 to 0.019 year-1. Net C accumulation rates ranged from 112 to 174 g C m-2 year-1 at 25 years and 70 to 113 g C m-2 year-1 at 50 years. Mass loss was up to 55% during the first 50 years of peat accumulation. Decomposition is greater at depth in the bogs—where 25 cm of peat correspond to 55 years of peat accumulation—than in the fen, where peat age is approximately 25 years at 25 cm depth. Lastly, information on fine-scale variations in peat mass decomposition and loss across ombrotrophic bogs and a fen help interpret other diagenetic processes in peatlands.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1616664
Report Number(s):
LLNL-JRNL--749770; 934951
Journal Information:
Biogeochemistry, Journal Name: Biogeochemistry Journal Issue: 1-2 Vol. 145; ISSN 0168-2563
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (49)

Organic matter transformation in the peat column at Marcell Experimental Forest: Humification and vertical stratification: Organic matter dynamics journal April 2014
Biophysical drivers of seasonal variability in Sphagnum gross primary production in a northern temperate bog journal May 2017
A comparative study of peat proxies from two eastern central Swedish bogs and their relation to meteorological data journal January 2006
The Ecology of Sphagnum book January 1982
Aboveground peat and carbon accumulation potentials along a bog-fen-marsh wetland gradient in southern boreal Alberta, Canada journal June 1999
Holocene Carbon Stocks and Carbon Accumulation Rates Altered in Soils Undergoing Permafrost Thaw journal November 2011
Partitioning pathways of CO2 production in peatlands with stable carbon isotopes journal December 2012
Dynamic Vertical Profiles of Peat Porewater Chemistry in a Northern Peatland journal October 2016
FTIR spectroscopy of peat in and bordering Scots pine woodland: relationship with chemical and biological properties journal July 2001
Characterization of solid and aqueous phases of a peat bog profile using molecular fluorescence spectroscopy, ESR and FT-IR, and comparison with physical properties journal January 2003
Advances in the determination of humification degree in peat since : Applications in geochemical and paleoenvironmental studies journal October 2018
14C Analysis of protein extracts from Bacillus spores journal July 2014
Transport and thermodynamics constrain belowground carbon turnover in a northern peatland journal June 2007
Comparisons of soil nitrogen mass balances for an ombrotrophic bog and a minerotrophic fen in northern Minnesota journal April 2016
FTIR spectroscopy can be used as a screening tool for organic matter quality in regenerating cutover peatlands journal February 2008
Local Spatial Heterogeneity of Holocene Carbon Accumulation throughout the Peat Profile of an Ombrotrophic Northern Minnesota Bog journal May 2018
Discussion Reporting of 14 C Data journal January 1977
Discussion: Reporting and Calibration of Post-Bomb 14C Data journal January 2004
14 C Background Levels in An Accelerator Mass Spectrometry System journal January 1987
Radiocarbon Dating of Modern Peat Profiles: Pre- and Post-Bomb 14 C Variations in the Construction of Age-Depth Models journal January 2005
Comparative Analysis of Cellulose Preparation Techniques for Use with 13 C, 14 C, and 18 O Isotopic Measurements journal November 2005
Nitrogen deposition and increased carbon accumulation in ombrotrophic peatlands in eastern Canada: N DEPOSITION AND PEAT ACCUMULATION journal July 2004
Global peatland dynamics since the Last Glacial Maximum: GLOBAL PEATLANDS SINCE THE LGM journal July 2010
Carbon and sediment accumulation in the Everglades (USA) during the past 4000 years: Rates, drivers, and sources of error: EVERGLADES CARBON AND SEDIMENT journal September 2012
Sensitivity of peatland carbon loss to organic matter quality: PEAT QUALITY AND CARBON LOSS journal July 2012
Accumulation and turnover of carbon in organic and mineral soils of the BOREAS northern study area journal December 1997
Age written in teeth by nuclear tests journal September 2005
The underappreciated potential of peatlands in global climate change mitigation strategies journal March 2018
Substrate-derived CO2 is important in the development of Sphagnum spp. journal November 2001
The Limits to Peat Bog Growth journal January 1984
Thawing permafrost increases old soil and autotrophic respiration in tundra: Partitioning ecosystem respiration using δ 13 C and ∆ 14 C journal November 2012
Radiocarbon peat chronologies and environmental change journal August 2005
Microbial Metabolic Potential for Carbon Degradation and Nutrient (Nitrogen and Phosphorus) Acquisition in an Ombrotrophic Peatland journal March 2014
Rates of peat accumulation during the postglacial period in 32 sites from Alaska to Newfoundland, with special emphasis on northern Minnesota journal May 2003
Carbon accumulation in peat deposits from northern Sweden to northern Germany during the last millennium journal June 2014
Carbon-isotope variation in Sphagnum from hummock-hollow complexes: implications for Holocene climate reconstruction journal June 1997
Recent rates of carbon and nitrogen accumulation in peatlands of Isla Grande de Chiloé-Chile journal November 2014
Input rates, decay losses and accumulation rates of carbon in bogs during the last millennium: internal processes and environmental changes journal January 2004
Peatland Biogeochemistry and Watershed Hydrology at the Marcell Experimental Forest book January 2011
Effects of Climate Change on Peatlands in the Far North of Ontario, Canada: A Synthesis journal February 2014
Uncertainty in Peat Volume and Soil Carbon Estimated Using Ground-Penetrating Radar and Probing journal January 2012
Northern Peatlands: Role in the Carbon Cycle and Probable Responses to Climatic Warming journal May 1991
Carbon Dioxide and Methane Exchange of a Subarctic Heath in Response to Climate Change Related Environmental Manipulations journal May 1997
IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0–50,000 Years cal BP journal January 2013
Atmospheric Radiocarbon for the Period 1950–2010 journal January 2013
Peatland Microbial Communities and Decomposition Processes in the James Bay Lowlands, Canada journal January 2012
Temperature of upland and peatland soils in a north central Minnesota forest journal August 1998
Litter type affects the activity of aerobic decomposers in a boreal peatland more than site nutrient and water table regimes journal January 2011
Peat decomposition records in three pristine ombrotrophic bogs in southern Patagonia journal January 2012

Similar Records

Variation in carbon and nitrogen concentrations among peatland categories at the global scale
Journal Article · Tue Nov 22 23:00:00 EST 2022 · PLoS ONE · OSTI ID:2203827

Local Spatial Heterogeneity of Holocene Carbon Accumulation throughout the Peat Profile of an Ombrotrophic Northern Minnesota Bog
Journal Article · Wed May 30 00:00:00 EDT 2018 · Radiocarbon · OSTI ID:1439959

Decomposition in northern Minnesota peatlands
Thesis/Dissertation · Mon Dec 31 23:00:00 EST 1984 · OSTI ID:7016478

Related Subjects