, Volume 8, Issue 6, pp 619–629 | Cite as

Ecosystem Respiration in a Cool Temperate Bog Depends on Peat Temperature But Not Water Table

  • P.M. LafleurEmail author
  • T.R. Moore
  • N.T. Roulet
  • S. Frolking


Ecosystem respiration (ER) is an important but poorly understood part of the carbon (C) budget of peatlands and is controlled primarily by the thermal and hydrologic regimes. To establish the relative importance of these two controls for a large ombrotrophic bog near Ottawa, Canada, we analyzed ER from measurements of nighttime net ecosystem exchange of carbon dioxide (CO2) determined by eddy covariance technique. Measurements were made from May to October over five years, 1998 to 2002. Ecosystem respiration ranged from less than 1 μmol CO2 m−2 s−1 in spring (May) and fall (late October) to 2–4 μmol CO2 m−2 s−1 during mid-summer (July-August). As anticipated, there was a strong relationship between ER and peat temperatures (r2 = 0.62). Q10 between 5° to 15°C varied from 2.2 to 4.2 depending upon the choice of depth where temperature was measured and location within a hummock or hollow. There was only a weak relationship between ER and water-table depth (r2 = 0.11). A laboratory incubation of peat cores at different moisture contents showed that CO2 production was reduced by drying in the surface samples, but there was little decrease in production due to drying from below a depth of 30 cm. We postulate that the weak correlation between ER and water table position in this peatland is primarily a function of the bog being relatively dry, with water table varying between 30 and 75 cm below the hummock tops. The dryness gives rise to a complex ER response to water table involving i) compensations between production of CO2 in the upper and lower peat profile as the water table falls and ii) the importance of autotrophic respiration, which is relatively independent of water-table position.


ecosystem respiration carbon dioxide peatland bog eddy covariance soil climate 



This project has been supported by funds from the NSERC Strategic Grant Program, NSERC Discovery Grants Program, the NSERC/CFCAS/BIOCAP Canada Fluxnet Canada Research Network, and the NASA Terrestrial Ecology and EOS Interdisciplinary Science Programs (to SF). We thank the National Capital Commission for permission to use Mer Bleue and Gershon Rother for his assistance over the last five years. We thank Adina Gillespie for laboratory assistance and Jill Bubier for insightful comments and suggestions. The authors are grateful to two anonymous reviewers and Ecosystems subject editor Dr. G. Shaver for their helpful suggestions on this manuscript.


  1. Arneth A, Kurbatova J, Kolle O, Shibistrova OB, Lloyd J, Schulze E-D. 2002. Comparative ecosystem-atmosphere exchange of energy and mass in a European Russian and a central Siberian bog II. Interseasonal and interannual variability of CO2 fluxes. Tellus B 54:514–30CrossRefGoogle Scholar
  2. Aubinet M and others. 2000. Estimates of annual net carbon and water exchange of European forests: The EUROFLUX methodology. Adv Ecol Res 30:113–75Google Scholar
  3. Aurela M, Tuovinen J-P, Laurila T. 1998. Carbon dioxide exchange in a subarctic peatland ecosystem in northern Europe measured by eddy covariance technique. J Geophys Res 103:11289–301CrossRefGoogle Scholar
  4. Aurela M, Laurila T, Tuovinen J-P. 2001. Seasonal CO2 balances of a subarctic mire. J Geophys Res 106:1623–37CrossRefGoogle Scholar
  5. Baldocchi DD, others. 2001. Fluxnet: A new tool to study the temporal and spatial variability of ecosystem-scale carbon dioxide, water vapor and energy flux densities. Bull Amer Meteorol Soc 82:2415–34CrossRefGoogle Scholar
  6. Bridgham SD, Richardson CJ. 1992. Mechanisms controlling soil respiration (CO2 and CH4) in southern peatlands. Soil Biol Biochem 24:1089–99CrossRefGoogle Scholar
  7. Bubier JL, Crill PM, Moore TR, Savage K, Varner RK. 1998. Seasonal patterns and controls on net ecosystem CO2 exchange in a boreal peatland complex. Global Biogeochem Cycles 12:703–14CrossRefGoogle Scholar
  8. Bubier JL, Bhatia G, Moore TR, Roulet NT, Lafleur PM. 2003a. Spatial and temporal variability in growing season net ecosystem carbon dioxide exchange at a large peatland in Ontario, Canada. Ecosystems 6:353–67Google Scholar
  9. Bubier J, Crill P, Mosedale A, Frolking S, Linder E. 2003b. Peatland responses to varying interannual moisture conditions as measured by automatic CO2 chambers. Global Biogeochem Cycles 17:doi:10.1029/2002GB0019Google Scholar
  10. Chapman SJ, Thurlow M. 1996. The influence of climate on CO2 and CH4 emissions from organic soils. Agric For Meteorol 79:205–17CrossRefGoogle Scholar
  11. Christensen TR, Jonasson S, Callaghan TV, Harstrom M. 1999. On potential CO2 release from tundra soils in a changing climate. Appl Soil Ecol 11:127–34CrossRefGoogle Scholar
  12. Enquist BJ, Economo EP, Huxman TE, Allen AP, Ignace DD, Gillooly JF. 2003. Scaling metabolisms from organisms to ecosystems. Nature 423:639–42CrossRefPubMedGoogle Scholar
  13. Fraser CJD, Roulet NT, Lafleur PM. 2001. Groundwater flow patterns in a large peatland. J Hydrol 246:142–54CrossRefGoogle Scholar
  14. Frolking S, Roulet NT, Moore TR, Richard PJH, Lavoie M, Muller SD. 2001. Modelling northern peatland decomposition and peat accumulation. Ecosystems 4:479–98CrossRefGoogle Scholar
  15. Frolking S, Roulet NT, Moore TR, Lafleur PM, Bubier JL, Crill PM. 2002. Modeling the seasonal to annual carbon balance of Mer Bleue bog, Ontario, Canada. Global Biogeochem Cycles 16:doi:10.1029/2001GB1457Google Scholar
  16. Funk DW, Pullman ER, Peterman KM, Crill, Billings WD. 1994. Influence of water table on carbon dioxide, carbon monoxide, and methane fluxes from taiga bog microcosms. Global Biogeochem Cycles 8:271–78CrossRefGoogle Scholar
  17. Giardina CP, Ryan MG. 2000. Evidence that decomposition rates of organic carbon in mineral soil do not vary with temperature. Nature 404:858–61CrossRefPubMedGoogle Scholar
  18. Gorham E. 1991. Northern peatlands: Role in the carbon balance and probable responses to climatic warming. Ecol Appl 1:182–95Google Scholar
  19. Goulden ML, Munger JW, Fan SM, Daube BC, Wofsy SC. 1996. Measurement of carbon storage by longterm eddy correlation: Methods and a critical assessment of accuracy. Global Change Biol 2:169–82Google Scholar
  20. Goulden ML, Daube BC, Fan S-M, Sutton DJ, Bazzaz A, Munger JW, Wofsy SC. 1997. Physiological response of black spruce forest to weather. J Geophys Res 102:28987–96CrossRefGoogle Scholar
  21. Grace J, Rayment M. 2000. Respiration in the balance. Nature 404:819–20CrossRefPubMedGoogle Scholar
  22. Hollinger DY, Kelliher FM, Byers JN, Hunt JE, McSeveny TM, Weir PL. 1994. Carbon dioxide exchange between an undisturbed old-growth temperate forest and the atmosphere Ecology 75:134–50Google Scholar
  23. Lafleur PM, Roulet NT, Admiral SW. 2001. Annual cycle of CO2 exchange at a bog peatland. J Geophys Res 106:3071–81CrossRefGoogle Scholar
  24. Lafleur PM, Roulet NT, Bubier JL, Frolking S, Moore TR. 2003. Interannual variability in the peatland-atmosphere carbon dioxide exchange at an ombrotrophic bog. Global Biogeochem Cycles 17:doi:10.1029/2002GB001983Google Scholar
  25. Law BE, Ryan MG, Anthoni PM. 1999. Seasonal and annual respiration of a ponderosa pine ecosystem. Global Change Biol 5:169–82CrossRefGoogle Scholar
  26. Letts MG, Roulet NT, Comer NT, Skarupa MR, Verseghy DL. 2000. Parameterization of peatland hydraulic properties for the Canadian Land Surface Scheme. Atmosphere-Ocean 38:141–60Google Scholar
  27. Linn DM, Doran JW. 1984. Effect of water-filled pore space on carbon dioxide and nitrous oxide production in tilled and non-tilled soils. Soil Sci Soc Am J 48:1267–72Google Scholar
  28. Melillo JM, Steudler PA, Aber JD, Newkirk K, Lux H, Bowles FP, Catricala C, Magill A, Aherns T, Morrisseau S. 2002. Soil warming and carbon-cycle feedbacks to the climate system. Science 298:2173–76CrossRefPubMedGoogle Scholar
  29. Moore TR, Dalva M. 1993. The influence of temperature and water table position on carbon dioxide and methane emissions from laboratory columns of peatland soils. J Soil Sci 44:651–64Google Scholar
  30. Moore TR, Dalva M. 1997. CH4 and CO2 exchange potentials of peat soils in aerobic and anaerobic laboratory incubations. Soil Biol Biochem 29:1157–64CrossRefGoogle Scholar
  31. Moore T, Bubier J, Lafleur P, Frolking S, Roulet N. 2002. Plant biomass, production and CO2 exchange in an ombrotrophic bog. J Ecol 90:25–36CrossRefGoogle Scholar
  32. Nazaroff WW. 1992. Radon transport from soil to air. Rev Geophys 30:137–60Google Scholar
  33. Neumann HH, den Hartog G, King KK, Chipanshi AC. 1994. Carbon dioxide fluxes over a raised open bog at the Kinosheo Lake tower site during the Northern Wetlands Study (NOWES). J Geophys Res 99:1529–38CrossRefGoogle Scholar
  34. Nieven JP, Jacobs CMJ, Jacobs AFG. 1998. Diurnal and seasonal variation of carbon dioxide exchange from a former true raised bog. Global Change Biol 4:823–50CrossRefGoogle Scholar
  35. Nordstroem C, Soegaard H, Christensen TR, Friborg T, Hansen BU. 2001. Seasonal carbon dioxide balance and respiration of a high-arctic fen ecosystem in NE-Greenland. Theor Appl Climatol 70:149–66CrossRefGoogle Scholar
  36. Oechel WC, Voulitis GL, Hastings SJ, Ault RP Jr, Bryant P. 1998. The effect of water table manipulation and elevated temperature on the CO2 flux of wet sedge tundra ecosystems. Global Change Biol 4:77–90CrossRefGoogle Scholar
  37. Reichstein M and others. 2003. Modeling temporal and large-scale spatial variability of soil respiration from soil water availability, temperature and vegetation productivity indices. Global Biogeochem Cycles 17:doi:10.1029/2003GB002035Google Scholar
  38. Riley J. 1983. Peatland Inventory Project. Geological Survey, Ontario Ministry of Natural Resources, Miscellaneous Paper 119, Toronto, Ontario, CanadaGoogle Scholar
  39. Scanlon D, Moore TR. 2000. CO2 production from peatland soil profiles: the influence of temperature, oxic/anoxic conditions and substrate. Soil Sci 165:153–60CrossRefGoogle Scholar
  40. Shurpali NJ, Verma SB, Kim J, Arkebauer TJ. 1995. Carbon dioxide exchange in a peatland ecosystem. J Geophys Res 100:14319–26CrossRefGoogle Scholar
  41. Silvola J, Alm J, Ahlholm U, Nykänen H, Martikainen PJ. 1996a. CO2 fluxes from peat in boreal mires under varying temperature and moisture conditions. J Ecol 84:219–28Google Scholar
  42. Silvola J, Alm J, Ahlholm U, Nykänen H, Martikainen PJ. 1996b. The contribution of plant roots to CO2 fluxes from organic soils. Biol Fert Soils 23:126–31Google Scholar
  43. Skopp J, Jawson MD, Doran JW. 1990. Steady-state aerobic microbial activity as a function of soil water content. Soil Sci Soc Am J 54:1619–25Google Scholar
  44. Soegaard H, Nordstroem C. 1999. Carbon dioxide exchange in a high-arctic fen estimated by eddy covariance measurements and modelling. Global Change Biol 5:547–62Google Scholar
  45. Suyker AE, Verma SB, Arkebauer TJ. 1997. Season-long measurement of carbon dioxide exchange in a boreal fen. J Geophys Res 102:29021–28CrossRefGoogle Scholar
  46. Svensson BH. 1980. Carbon dioxide and methane fluxes from the ombrotrophic parts of a subarctic mire. Ecol Bull Stockholm 30:235–50Google Scholar
  47. Updegraff K, Pastor J, Bridgham SD, Johnston CA. 1995. Environmental and substrate controls over carbon and nitrogen mineralization in northern wetlands. Ecol Appl 5:151–63Google Scholar
  48. Updegraff K, Bridgham SD, Pastor J, Weishampel P, Harth C. 2001. Response of CO2 and CH4 emissions in peatlands to warming and water table manipulation. Ecol Appl 11:311–26Google Scholar
  49. Valentini R, Matteucci G, Dolman AJ, Schulze E-D, Rebmann C, others. 2000. Respiration as the main determinant of carbon balance in European forests. Nature 404:861–65CrossRefPubMedGoogle Scholar
  50. Vourlitis GL, Oechel WC. 1999. Eddy covariance measurements of net CO2 and energy fluxes of an Alaskan tussock tundra. Ecology 80:686–701Google Scholar
  51. Waddington JM, Rotenberg PA, Warren FJ. 2001. Peat CO2 production in a natural and cutover peatland: Implications for restoration. Biogeochemistry 54:115–30CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • P.M. Lafleur
    • 1
    Email author
  • T.R. Moore
    • 2
  • N.T. Roulet
    • 2
  • S. Frolking
    • 3
  1. 1.Department of GeographyTrent UniversityPeterboroughCanada
  2. 2.Department of Geography and The Centre for Climate & Global Change ResearchMcGill UniversityMontrealCanada
  3. 3.Institute for the Study of Earth, Ocean and SpaceUniversity of New HampshireDurhamUSA

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