Response of soil respiration to changes in soil temperature and water table level in drained and restored peatlands of the southeastern United States

Table 3 Mean annual total soil respiration (Mg CO₂ ha⁻¹ yr⁻¹), depth to water table (cm), and soil temperature (^oC) measured in peatland study sites in eastern North Carolina and southeastern Virginia

Location	Site	Land use	Total soil respiration	Water table depth	Soil temperature
GDS		Drained	25.9 ± 7.4^a (3)	75.5 ± 85.1 (3)	15.4 ± 1.6^a (3)
GD1	G-D-M	Drained	24.3 ± 3.3 (3)	76.4 ± 28.9 (3)	15.6 ± 0.5 (3)
GD2	G-D-P	Drained	27.5 ± 6.2 (3)	63.8 ± 66.0 (3)	15.0 ± 1.5 (3)
GD3	G-D-C	Drained	25.8 ± 2.4 (3)	86.2 ± 45.2 (3)	15.5 ± 0.2 (3)
HF		Drained	54.1 ± 10.8^b (3)	44.4 ± 8.9 (3)	20.8 ± 0.6^b (3)
PLNWR		Drained	31.5 ± 23.7^a (2)	62.7 ± 12.4 (2)	18.1 ± − (1)
	P-D-1	Drained	26.3 ± 4.9 (3)	80.3 ± 7.8 (3)	–
	P-D-2	Drained	36.7 ± 23.2 (4)	45.0 ± 9.6 (4)	18.1 ± 2.4 (4)
HF		Restored	71.2 ± 9.1^α (3)	38.3 ± 8.9^α (3)	18.0 ± 0.3 (3)
PLNWR		Restored	24.6 ± 4.6^β (2)	36.1 ± 22.1^α (2)	22.9 ± − (1)
	P-R-1	Restored	20.8 ± 2.5 (3)	47.8 ± 22.0 (3)	–
	P-R-2	Restored	28.4 ± 3.9 (2)	24.3 ± 2.0 (2)	22.9 ± 0.4 (2)
TLRP		Restored	20.8 ± 2.5^β (33)	7.9 ± 16.6^β (33)	18.9 ± 1.6 (33)

Values are mean ± standard error (number of plots included) calculated by averaging plot-level values at each site.
GDS great dismal swamp national wildlife refuge, HF North Carolina State University Hofmann Forest, PLNWR pocosin lakes national wildlife refuge, TLRP great dismal swamp mitigation bank timberlake restoration project.
Significant differences among locations are indicated by a, b for drained peatlands and by α and β for restored peatlands. No letters are displayed in the absence of a significant difference among locations

ISSN: 1750-0680