National Forest Report for Region 6 (Pacific Northwest)

The top ten species growing in National Forests in Region 6 (Pacific Northwest) in terms of standing biomass are Douglas- fir, western hemlock, ponderosa pine, Pacific silver fir, mountain hemlock, grand fir, lodgepole pine, white fir, western redcedar, and subalpine fir. These species account for 88.3% of the total aboveground biomass and 88.9% of the total merchantable volume. For merchantable wood volume, the species with the smallest percent change was Douglas- fir 0.5%, while the largest percent change was with subalpine fir -9.6%. For total aboveground biomass, the species with the smallest percent change was Douglas- fir -2.6%, while the largest percent change was with subalpine fir 27.4%. For sawlog wood volume, the species with the smallest percent change was white fir -1.8%, while the largest percent change was with subalpine fir -15.9%. For merchantable bole biomass, the species with the smallest percent change was ponderosa pine 0.4%, while the largest percent change was with white fir 19.4%. For stump wood and bark biomass, the species with the smallest percent change was ponderosa pine -0.7%, while the largest percent change was with western hemlock -45.6%. For top and limb biomass, the species with the smallest percent change was western hemlock 5.4%, while the largest percent change was with subalpine fir 228.9%.

Figure 1: Percent difference in total aboveground biomass and merchantable volume for the top ten species in Region 6 (Pacific Northwest)

Figure 2: Percent difference in component biomass and volume for the top ten species in Region 6 (Pacific Northwest)