Image: old growth fir forest, U.S. Forest Service- Pacific Northwest Region,

The peer reviewed journal article presenting the methods, main results and associated analyses for the USA forest maturity mapping can be accessed here:

Dominick A. DellaSala, Brendan Mackey, Patrick Norman, Carly Campbell, Patrick J. Comer, Cyril F. Kormos, Heather Keith and Brendan Rogers (2022) Mature and Old-Growth Forests Contribute to Large-Scale Conservation Targets in the Conterminous USA. Front. For. Glob. Change doi:

The source code for the forest maturity modelling used in DellaSala et al. (2022) can be accessed here:

Project GitHub link