Comprehensive Database of Diameter-based Biomass Regressions for North American Tree Species (GTR-NE-319)

A database consisting of 2,640 equations compiled from the literature for predicting the biomass of trees and tree components from diameter measurements of species found in North America. Bibliographic information, geographic locations, diameter limits, diameter and biomass units, equation forms, statistical errors, and coefficients are provided for each equation, along with examples of how to use the database. This new database will have applications for forest carbon estimation.

Seven tables (Tables 3-9) make up the database. Table 3 lists more than 2,600 equations and their coefficients; each row in the table represents a separate biomass regression. Tables 4 through 9 contain supporting information: species key, suggested assignments for species groups to apply generalized equations, and specific gravity information; tree component key; equation form key; parameters for stem ratio equations for selected stem biomass equations; stump diameter regression coefficients, outside and inside bark, for tree species of the Lake States; and sources and general locations for all equations.

The database is available for download as Microsoft Excel Spreadsheet files and PDF files. It is also available on a CD-ROM.