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: https://www.frontiersin.org/articles/10.3389/ffgc.2022.979528/full
This interactive mapping app presents the main project output showing the distribution of forest maturity and stand development in 10 ordinal (ranked) classes. A simplified version of this map can also be displayed where the ten classes have been collapsed into three categories: Young (classes 1-3); Intermediate (classes 4-6) and Mature (classes 7-9) (see the Documentation page for further details). Also displayed is Mature forest within the four GAP categories.
Instructions:
The default display shows the forest maturity map in 10 ordinal classes (with class 0 being "indeterminate")
Clicking on the "Layers" tab shows a menu of the three available data layers (mature forest 10 classes; mature forest 3 classes; mature forest in GAP tenure. The left hand box for each data layer can be ticked on/off and if ticked on the the slider can be used to make the layer transparent
Also shown are the boundaries for Conterminous USA Ecoregions Level III. Clicking on an Ecoregion will reveal its name.