A vertically integrated whole-tree biomass model

作者：Planck Neil R Ver^*; MacFarlane David W

来源：Trees - Structure and Function, 2015, 29(2): 449-460.

DOI：10.1007/s00468-014-1123-x

• Tree biomass
• Density integral
• Dominant stem
• Whole tree

Key message The density-integral approach worked well for estimating whole-tree and dominant stem vertical biomass profiles, and performed better than the constant-density approach for biomass prediction.
Abstract Integrated whole-tree biomass equations are in great demand due to the simultaneous need to improve estimation of forest carbon stocks and to quantify the distribution of wood biomass within trees for estimating whole-tree utilization potential. Two approaches were used for modeling the vertical cumulative biomass profile of a whole tree from the ground to the top of the tree, including the dominant stem and branches: (1) a density-integral approach and (2) a constant-density approach. The models were developed from destructive sampling of 27 trees from a temperate hardwood forest in Michigan, USA. The species sampled were American beech (Fagus grandifolia Ehrh.) and sugar maple (Acer saccharum Marsh.). A mixed-effects modeling framework was used to account for within-tree correlation in the biomass profiles. In general, the density-integral approach worked well for estimating whole-tree and dominant stem biomass profiles, and performed better than the constant-density approach. However, the results indicated that errors in the whole-tree volume estimation often overwhelmed differences in biomass prediction attributable to vertical tree density representation. Mixing species with different forms or density profiles could dilute benefits of the density-integral approach.

• 出版日期2015-4