Predicting Soil CO₂ Efflux Rates in the Loblolly Pine Ecosystem Across the Region

Abstract

Patterns in soil CO₂ efflux (E_c) over a short rotation were examined using a chronosequence approach on South Carolina Coastal Plain and Virginia Piedmont loblolly pine (Pinus taeda L.) stands. E_c was measured over an entire year in four separate age classes at both measurement locations in order to capture spatial and temporal variation in E_c over a 20+ year rotation. Within each stand, spatial variability was also accounted for by taking measurements both near the base of the tree and between rows. We found that soil temperature (at 10 cm) was the major driver of E_c on both locations. We also observed a strong positive stand age effect on E_c in Virginia Piedmont stands and a weak negative relationship between age and E_c in the South Carolina Coastal Plain stands. Variation in site preparation intensity between the two locations may influence the rate of carbon turnover.

Parent Publication

• Proceedings of the 12th biennial southern silvicultural research conference

Citation

Gough, Christopher; Seiler, John; Wiseman, Eric. 2004. Predicting Soil CO₂ Efflux Rates in the Loblolly Pine Ecosystem Across the Region. Gen. Tech. Rep. SRS–71. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 443-445