State Report for Wyoming

For Wyoming, estimated merchantable wood volume is expected to decrease from 14.235 billion cubic-feet to 12.81 billion (a change of -10%), while estimated sawlog wood volume is expected to decrease from 9.8092 billion cubic-feet to 8.6797 billion (-11.5%). Estimated merchantable bole biomass is expected to decrease from 186.23 million tons to 168.39 million (-9.6%), while estimated stump biomass is expected to decrease from 9.6854 million tons to 9.1041 million (-6%), and estimated tops and limbs biomass is expected to increase from 33.498 million tons to 78.615 million (134.7%). Finally, estimated aboveground biomass is expected to increase from 248.52 million tons to 278.18 million, a change of 11.9%.

Figure 1: Percent difference in volume and biomass for Wyoming

Species breakdown

The top ten species in Wyoming in terms of standing biomass are lodgepole pine, Engelmann spruce, subalpine fir, Douglas- fir, ponderosa pine, quaking aspen, whitebark pine, limber pine, plains cottonwood, and narrowleaf cottonwood. These species account for 98.9% of the total aboveground biomass and 99.2% of the total merchantable volume. For merchantable wood volume, the species with the smallest percent change was quaking aspen -0.1%, while the largest percent change was with limber pine -16.2%. For total aboveground biomass, the species with the smallest percent change was whitebark pine 2.6%, while the largest percent change was with narrowleaf cottonwood 44.6%. For sawlog wood volume, the species with the smallest percent change was ponderosa pine 1.7%, while the largest percent change was with limber pine -21.2%. For merchantable bole biomass, the species with the smallest percent change was subalpine fir -4.6%, while the largest percent change was with limber pine -29.2%. For stump wood and bark biomass, the species with the smallest percent change was whitebark pine -4%, while the largest percent change was with narrowleaf cottonwood 49%. For top and limb biomass, the species with the smallest percent change was quaking aspen 36.4%, while the largest percent change was with plains cottonwood 363.8%.

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

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