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Temperature as a control over ecosystem CO2 fluxes in a high-elevation, subalpine forest

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Abstract

We evaluated the hypothesis that CO2 uptake by a subalpine, coniferous forest is limited by cool temperature during the growing season. Using the eddy covariance approach we conducted observations of net ecosystem CO2 exchange (NEE) across two growing seasons. When pooled for the entire growing season during both years, light-saturated net ecosystem CO2 exchange (NEEsat) exhibited a temperature optimum within the range 7–12°C. Ecosystem respiration rate (R e), calculated as the y-intercept of the NEE versus photosynthetic photon flux density (PPFD) relationship, increased with increasing temperature, causing a 15% reduction in net CO2 uptake capacity for this ecosystem as temperatures increased from typical early season temperatures of 7°C to typical mid-season temperatures of 18°C. The ecosystem quantum yield and the ecosystem PPFD compensation point, which are measures of light-utilization efficiency, were highest during the cool temperatures of the early season, and decreased later in the season at higher temperatures. Branch-level measurements revealed that net photosynthesis in all three of the dominant conifer tree species exhibited a temperature optimum near 10°C early in the season and 15°C later in the season. Using path analysis, we statistically isolated temperature as a seasonal variable, and identified the dynamic role that temperature exhibits in controlling ecosystem fluxes early and late in the season. During the spring, an increase in temperature has a positive effect on NEE, because daytime temperatures progress from near freezing to near the photosynthetic temperature optimum, and Re values remain low. During the middle of the summer an increase in temperature has a negative effect on NEE, because inhibition of net photosynthesis and increases in R e. When taken together, the results demonstrate that in this high-elevation forest ecosystem CO2 uptake is not limited by cool-temperature constraints on photosynthetic processes during the growing-season, as suggested by some previous ecophysiological studies at the branch and needle levels. Rather, it is warm temperatures in the mid-summer, and their effect on ecosystem respiration, that cause the greatest reduction in the potential for forest carbon sequestration.

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References

  1. Anthoni PM, Law BE, Unsworth MH (1999) Carbon and water vapor exchange of an open-canopied ponderosa pine ecosystem. Agric For Meteorol 95:151–168

  2. Aubinet M, Grelle A, Ibrom A, Rannik U, Moncrieff J, Foken T, Kowalski P, Martin P, Berbigier P, Bernhofer C, Clement R, Elbers J, Granier A, Grunwald T, Morgenster K, Pilegaard K, Rebmann C, Snijders W, Valentini R, Vesala T (2000) Estimates of the annual net carbon and water exchanges of European forests: the EUROFLUX methodology. Adv Ecol Res 30:113–174

  3. Baldocchi DD, Vogel CA, Hall B (1997) Seasonal variation of carbon dioxide exchange rates above and below a boreal jack pine forest. Agric For Meteorol 83:147–170

  4. Bassow SL, Bazzaz FA (1998) How environmental conditions affect canopy leaf-level photosynthesis in four deciduous tree species. Ecology 79:2660–2675

  5. Black TA, DenHartog G, Neumann HH, Blanken PD, Yang PC, Russell C, Nesic Z, Lee X, Chen SG, Staebler R, Novak MD (1996) Annual cycles of water vapour and carbon dioxide fluxes in and above a boreal aspen forest. Global Change Biol 2:219–229

  6. Canadell JG, Mooney HA, Baldocchi DD, Berry JA, Ehleringer JR, et al (2000) Carbon metabolism of the terrestrial biosphere: a multi-technique approach for improved understanding. Ecosystems 3:115–130

  7. Chen JM, Rich PM, Gower ST, Norman JM, Plummer S (1997) Leaf area index of boreal forests: theory, techniques, and measurements. J Geophys Res 102:29429–29443

  8. Clark KL, Gholz HL, Moncrieff JB, Cropley F, Loescher HW (1999) Environmental controls over net exchanges of carbon dioxide from contrasting Florida ecosystems. Ecol Appl 9:936–948

  9. Day TA, Heckathorn SA, DeLucia EH (1991) Limitations of photosynthesis in Pinus taeda L. (loblolly pine) at low temperatures. Plant Physiol 96:1246–1254

  10. Delucia EH (1986) Effect of low root temperature on net photosynthesis, stomatal conductance and carbohydrate concentration in Engelmann spruce (Picea engelmannii Parry ex Engelm.) seedlings. Tree Physiol 2:143–154

  11. DeLucia EH, Smith WK (1987) Air and soil temperature limitations on photosynthesis in Engelmann spruce during summer. Can J Bot 17:527–533

  12. Delucia EH, Hamilton JG, Naidu SL, et al (1999) Net primary production of a forest ecosystem with experimental CO2 enrichment. Science 284:1177–1179

  13. Field CB (1999) Diverse controls on carbon storage under elevated CO2: toward a synthesis. In: Luo Y, Mooney HA (eds) Carbon dioxide and environmental stress. Academic Press, New York, pp 373–392

  14. Giardina CP, Ryan MG (2000) Evidence that decomposition rates of organic carbon in mineral soil do not vary with temperature. Nature 404:858–861

  15. Goldstein AH, Hultman NE, Fracheboud JM, Bauer MR, Panek JA, Xu M, Qi Y, Guenther AB, Baugh W (2000) Effects of climate variability on the carbon dioxide, water and sensible heat fluxes above a ponderosa pine plantation in the Sierra Nevada (CA). Agric For Meteorol 101:113–129

  16. Goulden ML, Munger JW, Fan S-M, Daube BC, Wofsy SC (1996) Measurements of carbon sequestration by long-term eddy covariance: Methods and a critical evaluation of accuracy. Global Change Biol 2:169–182

  17. Goulden ML, Daube BC, Fan SM, Sutton DJ, Bazzaz FA, Munger JW, Wofsy SC (1997) Physiological responses of black spruce forest to weather. J Geophys Res 102:28987–28996

  18. Grace S, Rayment M (2000) Respiration in the balance. Nature 404:819–820

  19. Granier A, Ceschia E, Damesin C, Dufrene E, Epron D et al (2000) The carbon balance of a young beech forest. Funct Ecol 14:312–325

  20. Greco S, Baldocchi DD (1996) Seasonal variations of CO2 and water vapor exchange rates over a temperate deciduous forest. Global Change Biol 2:183–197

  21. Hollinger DY, Kelliher FM, Schulze ED, Bauer G, Arneth A et al (1998) Forest-atmosphere carbon dioxide exchange in eastern Siberia. Agric For Meteorol 90:291–306

  22. Houghton JT (1991) The role of forests in affecting the greenhouse gas composition of the atmosphere. In: Wyman RL (ed) Global climate change and life on earth. Chapman & Hall, New York, USA, pp 43–56

  23. Jarvis PG, Massheder JM, Hale SE, Moncrieff JB, Rayment M, Scott SL (1997) Seasonal variation of carbon dioxide, water vapor and energy exchanges of a boreal black spruce forest. J Geophys Res 102:28953–28966

  24. Kaimal JC, Finnigan JJ (1994) Atmospheric boundary layer flows, their structure and measurement. Oxford University Press, New York

  25. Keeling CD, Whorf TP (1998) Atmospheric CO2 records from sites in the SIO air sampling network. In: Trends: a compendium of data on global change carbon dioxide. Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tenn.

  26. Law BE, Ryan MG, Anthoni PM (1999) Seasonal and annual respiration of a ponderosa pine ecosystem. Global Change Biol 5:169–182

  27. Law BE, Godstein AH, Anthoni PM, Unsworth MH, Panek JA, Bauer MR, Fracheboud JM, Hultman N (2001) Carbon dioxide and water vapor exchange by young and old ponderosa pine ecosystems during a dry summer. Tree Physiol 21:299–308

  28. Li CC (1981) Path analysis: a primer, 3rd edn. Boxwood, Pacific Grove, Calif.

  29. Malhi Y, Nobre AD, Grace J, Kruijt B, Pereira MGP, Culf, Scott S (1998) Carbon dioxide transfer over a central Amazonian rain forest. J Geophys Res 103:31593–31612

  30. Monson RK, Turnipseed AA, Sparks JP, Harley PC, Scott-Denton LE, Sparks K, Huxman TE (2002) Carbon sequestration in a high elevation subalpine forest. Global Change Biol 8:459–478

  31. Pacala SW, Hurtt GC, Baker D, Peylin P, Houghton RA, Birdsey RA, Heath L, Sundquist ET, Stallard RF, Ciais P, Moorcroft P, Caspersen JP, Shevliakova E, Moore B, Kohlmaier G, Holland E, Gloor M, Harmon ME, Fan SM, Sarmiento JL, Goodale CL, Schimel D, Field CB (2001) Consistent land- and atmosphere-based US carbon sink estimates. Science 292:2316–2320

  32. Potvin C, Lechowicz MJ, Tardif S (1990) The statistical analysis of ecophysiological response curves obtained from experiments involving repeated measures. Ecology 71:1389–1400

  33. Rosenberg NJ, Blad BL, Verma S (1983) Microclimate: the biological environment. Wiley, New York

  34. Ruimy A, Jarvis PG, Baldocchi DD, Saugier B (1995) CO2 fluxes over plant canopies and solar radiation: a review. Adv Ecol Res 26:1–68

  35. Schemske DW, Horvitz C (1988) Plant animal interactions and fruit production in a neotropical herb: a path analysis. Ecology 69:1128–1137

  36. Schimel DS (1995) Terrestrial ecosystems and the carbon cycle. Global Change Biol 1:77–91

  37. Schimel DS, Brawell BH, Holland EA, McKeown R, Ojima DS, Painter TH, Parton WJ, Townsend AR (1994) Climatic, edaphic, and biotic controls over storage and turnover of carbon in soils. Global Biogeochem Cycles 8:279–293

  38. Schimel DS, House JI, Hibbard KA, et al (2001) Recent patterns and mechanisms of carbon exchange by terrestrial ecosystems. Nature 414:169–172

  39. Schlesinger WH (1997) Biogeochemistry: an analysis of global change. Academic Press, San Diego, Calif.

  40. Scott-Denton LE, Sparks KL, Monson RK (2002) Spatial and temporal controls over soil respiration rate in a high-elevation, subalpine forest. Soil Biol Biochem (in press)

  41. Sellers PJ, Dickinson RE, Randall DA, et al (1996) Comparison of radiative and physiological effects of doubled atmospheric CO2 on climate. Science 271:1402–1406

  42. Smith WK (1985) Environmental limitations of leaf conductance in central Rocky Mountain conifers, USA. In: Turner W, Tranquillini T (eds) Establishment and tending of subalpine forest: research and management. Eidg Anst Forstl Vers Ber 270:95–101

  43. Smith WK, Brewer CA (1994) The adaptive importance of shoot and crown architecture in conifer trees. Am Nat 143:528–532

  44. Smith WK, Carter GA (1988) Shoot structural effects on needle temperature and photosynthesis in conifers. Am J Bot 75:496–500

  45. Smith WK, Knapp AK (1990) Ecophysiology of high elevation forests. In: Osmond CB, Pitelka LF, Hidy GM (eds) Plant biology of the basin and range. Springer, Berlin Heidelberg New York, pp 87–142

  46. Sokal RR, Rohlf FJ (1981) Biometry, 2nd edn. Freeman, San Francisco, Calif.

  47. Teskey RO, Sheriff DW, Hollinger DY, Thomas RB (1995) External and internal factors regulating photosynthesis. In: Smith WK, Hinkley TM (eds) Resource physiology of conifers. Academic Press, San Diego, Calif., pp 105–140

  48. Turnipseed AA, Blanken PD, Anderson DE, Monson RK (2002) Energy budget above a high-elevation subalpine forest in complex topography. Agric For Meteorol 110:177–201

  49. Valentini R, DeAngelis G, Matteucci G, Monaco R, Dore S, Scarascia Mugnozza GE (1996) Seasonal net carbon dioxide exchange of a beech forest with the atmosphere. Global Change Biol 2:199–207

  50. Valentini R, Matteucci G, Dolman AJ, et al (2000) Respiration as the main determinant of carbon balance in European forests. Nature 404:861–865

  51. Webb EK, Pearman GI, Leuning R (1980) Correction of flux measurement for density effects due to heat and water vapor transfer. Q J R Meteorol Soc 106:85–100

  52. Wisniewski J, Lugo AE (1992) Natural sinks of CO2. Kluwer Academic, Dordrecht

  53. Wofsy SC, Goulden ML, Munger JW, Fan SM, Bakwin PS, Daube BC, Bassow SL, Bazzaz FA (1993) Net exchange of CO2 in a mid-latitude forest. Science 260:1314–1317

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Acknowledgements

The authors are grateful for the support and assistance of Laura Scott-Denton, Kim Sparks, William Bowman, Dave Bowling, Dan Hereid, and Brant Backland. Comments on an earlier version of the manuscript by two referees helped to improve the manuscript. This research was funded by the South Central Section of the National Institute for Global Environmental Change (NIGEC) through the U.S. Department of Energy (Cooperative Agreement No. DE-FC03–90ER61010). Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the DOE.

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Correspondence to T. E. Huxman.

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Huxman, T.E., Turnipseed, A.A., Sparks, J.P. et al. Temperature as a control over ecosystem CO2 fluxes in a high-elevation, subalpine forest. Oecologia 134, 537–546 (2003). https://doi.org/10.1007/s00442-002-1131-1

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Keywords

  • Net ecosystem exchange
  • Photosynthesis
  • Eddy covariance
  • Ecosystem respiration
  • Path analysis