National Forest Report for Region 5 (Pacific Southwest)

The top ten species growing in National Forests in Region 5 (Pacific Southwest) in terms of standing biomass are Douglas- fir, white fir, ponderosa pine, California red fir, Jeffrey pine, canyon live oak, incense- cedar, sugar pine, lodgepole pine, and California black oak. These species account for 88.2% of the total aboveground biomass and 89.8% of the total merchantable volume. For merchantable wood volume, the species with the smallest percent change was Douglas- fir 1.4%, while the largest percent change was with canyon live oak -32%. For total aboveground biomass, the species with the smallest percent change was Douglas- fir 1.4%, while the largest percent change was with white fir 33.6%. For sawlog wood volume, the species with the smallest percent change was Douglas- fir -1.3%, while the largest percent change was with canyon live oak 30.8%. For merchantable bole biomass, the species with the smallest percent change was sugar pine -1.1%, while the largest percent change was with canyon live oak -37.1%. For stump wood and bark biomass, the species with the smallest percent change was white fir -0.6%, while the largest percent change was with Douglas- fir -33.2%. For top and limb biomass, the species with the smallest percent change was Douglas- fir -23.5%, while the largest percent change was with lodgepole pine 210.9%.

Figure 1: Percent difference in total aboveground biomass and merchantable volume for the top ten species in Region 5 (Pacific Southwest)

Figure 2: Percent difference in component biomass and volume for the top ten species in Region 5 (Pacific Southwest)