State Report for Utah

For Utah, estimated merchantable wood volume is expected to decrease from 7.747 billion cubic-feet to 7.3534 billion (a change of -5.1%), while estimated sawlog wood volume is expected to decrease from 5.4935 billion cubic-feet to 4.9684 billion (-9.6%). Estimated merchantable bole biomass is expected to decrease from 104.06 million tons to 100.36 million (-3.5%), while estimated stump biomass is expected to increase from 5.1761 million tons to 5.4093 million (4.5%), and estimated tops and limbs biomass is expected to increase from 20.817 million tons to 46.11 million (121.5%). Finally, estimated aboveground biomass is expected to increase from 140.21 million tons to 162.75 million, a change of 16.1%.

Figure 1: Percent difference in volume and biomass for Utah

Species breakdown

The top ten species in Utah in terms of standing biomass are quaking aspen, Douglas- fir, Engelmann spruce, subalpine fir, lodgepole pine, white fir, ponderosa pine, limber pine, blue spruce, and narrowleaf cottonwood. These species account for 99.4% of the total aboveground biomass and 99.6% of the total merchantable volume. For merchantable wood volume, the species with the smallest percent change was narrowleaf cottonwood 0.1%, while the largest percent change was with lodgepole pine -11.2%. For total aboveground biomass, the species with the smallest percent change was Douglas- fir 1.6%, while the largest percent change was with narrowleaf cottonwood 49.4%. For sawlog wood volume, the species with the smallest percent change was limber pine -0.4%, while the largest percent change was with lodgepole pine -18.5%. For merchantable bole biomass, the species with the smallest percent change was ponderosa pine -1.1%, while the largest percent change was with limber pine -16.7%. For stump wood and bark biomass, the species with the smallest percent change was ponderosa pine 1.1%, while the largest percent change was with narrowleaf cottonwood 58.4%. For top and limb biomass, the species with the smallest percent change was quaking aspen 36.3%, while the largest percent change was with limber pine 303.5%.

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

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