A Comparison of Above-Ground Dry-Biomass Estimators for Trees in the Northeastern United States

In the northeastern United States, both component and total aboveground tree dry-biomass estimates are available from several sources. In this study, comparisons were made among four methods to promote understanding of the similarities and differences in live-tree biomass estimators. The methods use various equations developed from biomass data collected in the United States and Canada. For hardwood species, estimates for biomass components tended to differ among the methods; however, the estimates for total aboveground biomass were more compatible. For softwood species, the biomass estimates among methods were more consistent for components and total aboveground biomass. Considerable variation in biomass component estimates exists among the four methods, suggesting that further study of biomass is needed in the northeastern United States. Ideally, reliable biomass estimators would be established via a regionwide study having consistent and precise definitions and measurement protocols.