LegacyTreeData v2

A repository of individual tree measurements of volume, weight, and physical properties. As of April 2023 the collection included records from over 290,000 trees, most of which were felled, and measured for stem taper and volume. Weight measurements were compiled on over 23,000 of the trees subjected to destructive sampling. Biomass components included stem wood and bark, branches, and foliage, including 11,209 trees having direct estimates of aboveground biomass (AGB). Stem volumes are recorded for over 248,600 trees, 81% of which included stem taper measurements. Over 300 species are represented in the stem volume data, with ≥ 100 trees sampled on 114 of the species in the data set. 

The collection spans over 100 years of fieldwork where detailed tree measurements were collected by private companies, government agencies – primarily the US Forest Service, and university researchers. Compiling these data from past studies depended largely on people and institutions who served for decades as stewards of the data and record-keepers. The information compiled here was often derived from larger collections of data and archival materials that in some cases included study plans, field notes, or other pertinent information. We preserved as much of this as was practical in supplementary files not archived here but available through a searchable, downloadable database online at https://www.legacytreedata.org.