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Soil Carbon Dioxide Characteristics under Different Forest Types and after Harvest

Dep. of Plant, Soil and Environmental Sciences, Univ. of Maine, Orono, ME 04469

Mark B. David

Dep. of Forestry, Univ. of Illinois, Urbana, IL 61801

*Corresponding author.

ABSTRACT

To characterize soil CO₂ under different forest types and several years after a clear-cut harvest, soil CO₂ evolution and soil air CO₂ concentrations were measured at three sites in Maine: the Howland Integrated Forest Study (HIFS) site, the Bear Brook Watershed in Maine (BBWM) site, and the Letter E township (Letter E) site. Soil CO₂ evolution means ranged from 0.19 to 0.32 g m^–2 h^–1 among sites, whereas soil air CO₂ concentration means ranged from 1023 µL L^–1 for the O horizon to 3296 µL L^–1 for the C horizon for the 1990 growing season. Soil CO₂ evolution and soil air CO₂ concentrations were similar under deciduous and coniferous forests and 4 to 6 yr after harvest. Limited multiple-year data suggest that significant annual variations in temporal patterns of these properties exist as a function of short-term climatic factors. These data suggest that soil CO₂ evolution and soil air CO₂ concentrations may be somewhat similar across a diversity of soil types, forest types, and forest conditions at any point in time for northern New England.

Received for publication February 25, 1992.

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