Water, Air, and Soil Pollution

, Volume 64, Issue 1, pp 327–344

Changes in C storage by terrestrial ecosystems: How C-N interactions restrict responses to CO2 and temperature

Authors

  • E. B. Rastetter
    • Marine Biological LaboratoryThe Ecosystems Center
  • R. B. McKANE
    • Marine Biological LaboratoryThe Ecosystems Center
  • G. R. Shaver
    • Marine Biological LaboratoryThe Ecosystems Center
  • J. M. Melillo
    • Marine Biological LaboratoryThe Ecosystems Center
Part IV Modeling Carbon Fluxes

DOI: 10.1007/BF00477109

Cite this article as:
Rastetter, E.B., McKANE, R.B., Shaver, G.R. et al. Water Air Soil Pollut (1992) 64: 327. doi:10.1007/BF00477109

Abstract

A general model of ecosystem biogeochemistry was used to examine the responses of arctic tundra and temperate hardwood forests to a doubling of CO2 concentration and to a 5°C increase in average growing season temperature. The amount of C stored in both ecosystems increased with both increased CO2 and temperature. Under increased CO2, the increase in C storage was due to increases in the C∶N ratio of both vegetation and soils. Under increased temperature, the increased C storage in the forest was due to a shift in N from soils (with low C∶N ratios) to vegetation (with high C∶N ratios). In the tundra, both a shift in N from soils to vegetation and an increase in C∶N ratios contributed to increased C storage under higher temperatures. Neither ecosystem sequestered N from external sources because the supply rate was low.

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© Kluwer Academic Publishers 1992