State Report for Oregon

For Oregon, estimated merchantable wood volume is expected to decrease from 110.65 billion cubic-feet to 109.89 billion (a change of -0.7%), while estimated sawlog wood volume is expected to decrease from 100.01 billion cubic-feet to 96.67 billion (-3.3%). Estimated merchantable bole biomass is expected to decrease from 1.7162 billion tons to 1.7067 billion (-0.6%), while estimated stump biomass is expected to decrease from 75.628 million tons to 57.171 million (-24.4%), and estimated tops and limbs biomass is expected to increase from 292.58 million tons to 355.37 million (21.5%). Finally, estimated aboveground biomass is expected to increase from 2.1352 billion tons to 2.172 billion, a change of 1.7%.

Figure 1: Percent difference in volume and biomass for Oregon

Species breakdown

The top ten species in Oregon in terms of standing biomass are Douglas- fir, ponderosa pine, western hemlock, grand fir, white fir, lodgepole pine, mountain hemlock, red alder, bigleaf maple, and Pacific silver fir. These species account for 86.3% of the total aboveground biomass and 87.2% of the total merchantable volume. For merchantable wood volume, the species with the smallest percent change was Douglas- fir 0.3%, while the largest percent change was with bigleaf maple -19.1%. For total aboveground biomass, the species with the smallest percent change was Douglas- fir -2.5%, while the largest percent change was with lodgepole pine 26%. For sawlog wood volume, the species with the smallest percent change was ponderosa pine 0.9%, while the largest percent change was with bigleaf maple -11.6%. For merchantable bole biomass, the species with the smallest percent change was Douglas- fir 0.5%, while the largest percent change was with white fir 19.5%. For stump wood and bark biomass, the species with the smallest percent change was ponderosa pine 3.3%, while the largest percent change was with western hemlock -46.1%. For top and limb biomass, the species with the smallest percent change was Pacific silver fir 3.2%, while the largest percent change was with lodgepole pine 147%.

Figure 2: Percent difference in total aboveground biomass and merchantable volume for the top ten species in Oregon

Figure 3: Percent difference in component biomass and volume for the top ten species in Oregon