Open AccessThe influence of microtopographic heterogeneity on carbon dioxide efflux from a subarctic bog
Author(s) -
Lukeno J. O.,
Billings W. D.
Publication year - 1985
Publication title -
ecography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.973
H-Index - 128
eISSN - 1600-0587
pISSN - 0906-7590
DOI - 10.1111/j.1600-0587.1985.tb01183.x
Subject(s) - subarctic climate , bog , peat , soil respiration , environmental science , carbon dioxide , mire , permafrost , growing season , soil carbon , carbon cycle , respiration , agronomy , soil science , environmental chemistry , ecology , chemistry , soil water , ecosystem , botany , biology
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.