The top ten species growing in National Forests in Region 10 (Alaska) in terms of standing biomass are western hemlock, Sitka spruce, mountain hemlock, Alaska yellow- cedar, western redcedar, lodgepole pine, red alder, black cottonwood, white spruce, and paper birch. These species account for 99.9% of the total aboveground biomass and 99.9% of the total merchantable volume. For merchantable wood volume, the species with the smallest percent change was western redcedar 0.2%, while the largest percent change was with black cottonwood 11.1%. For total aboveground biomass, the species with the smallest percent change was Alaska yellow- cedar -1.4%, while the largest percent change was with white spruce 78.3%. For sawlog wood volume, the species with the smallest percent change was lodgepole pine -4.6%, while the largest percent change was with paper birch -26.1%. For merchantable bole biomass, the species with the smallest percent change was western redcedar 0.6%, while the largest percent change was with white spruce 52.1%. For stump wood and bark biomass, the species with the smallest percent change was red alder 12.9%, while the largest percent change was with white spruce 51.8%. For top and limb biomass, the species with the smallest percent change was red alder 47.8%, while the largest percent change was with lodgepole pine 325.7%.
Figure 1: Percent difference in total aboveground biomass and merchantable volume for the top ten species in Region 10 (Alaska)
Figure 2: Percent difference in component biomass and volume for the top ten species in Region 10 (Alaska)