Carbon Flux of Down Woody Materials in Forests of the North Central United States

Table 1

Mean stock density (time 1, 2002) and average annual carbon flux for standing live/dead trees and down woody materials (fine and coarse) where a negative estimate indicates a net sequestration north central across the United States, 2002 to 2007 (obs = 182).

Stock	Mean Carbon Stock Time 1 (Mg/ha)	Std. Err. (Mg/ha)	Mean Carbon Flux (Mg/ha/yr)	Std. Err. (Mg/ha/yr)
Standing Live	36.48	1.85	−0.25	0.11
Standing Dead	3.18	0.39	−0.12	0.06
Coarse Woody Debris	3.82	0.42	−0.01	0.07
Fine Woody Debris	2.91	0.21	−0.04	0.06
Small Fine Woody Debris	0.14	0.01	0.00	0.01
Medium Fine Woody Debris	0.83	0.08	−0.01	0.01
Large Fine Woody Debris	1.94	0.16	−0.03	0.06