The influence of microtopographic heterogeneity on carbon dioxide efflux from a subarctic bog

• Published in: Ecography
• Main Authors: Lukeno, J. O., Billings, W. D.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1985
• Subjects: Ecology, Evolution, Behavior and Systematics; Fairbanks; permafrost; Subarctic; Alaska
• Online Access: http://dx.doi.org/10.1111/j.1600-0587.1985.tb01183.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0587.1985.tb01183.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0587.1985.tb01183.x

Soil carbon dioxide efflux was measured in hummock and hollow niicrohabitals of a subarctic peat bog near Fairbanks, Alaska, during the 1983 growing season. Regardless of the presence of permafrost, hummocks showed a late June or early July peak in soil respiration followed by a gradual decrease. Hollows and wet Carex Lawns showed a gradual increase in soil respiration with no mid‐season peaks. Regression equations using soil temperature and soil moisture as independent variables explained 76% of the variance associated with soil carbon dioxide efflux. Sucrose (100 g m −2 ) applied to a field plot caused a significant increase in soil respiration but nitrogen (5 g m −2 ) did not. Sequential effects of nitrogen and phosphorus on peat respiration were demonstrated in a laboratory experiment.