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Whitebark pine distribution and regeneration

Whitebark pine seedling in a lodgepole pine/Douglas-fir stand, White Cloud Mountains, Sawtooth National Forest, Idaho

Whitebark pine (Pinus albicaulis) is an ecologically important species in high-altitude areas of the West due to the habitat and food source it provides for Clark’s nutcrackers, red...

Traumatic resin ducts indicate past beetle outbreaks

Example of traumatic resin ducts formed during 1997, 1998, and tangentially during 1999, in response to a large spruce beetle outbreak.

The formation of traumatic resin ducts in Engelmann spruce represents an important induced defense in response to environmental perturbations.

The most comprehensive inventory of Colorado’s forests – ever!

Colorado’s forests have sustained people for millennia. Photo by J.D. Shaw

The results are in from Forest Inventory Analysis data collected from 2002 to 2014, reporting on growth, mortality, and many other forest characteristics.

Shape selection in Landsat time series

This graph is the legend to the following Landsat images and illustrates the mean predicted percent tree canopy by year. The gradual reduction in tree canopy is driven by insect outbreak. The large drop in 2002 is a result of fire.

The tree canopy patterns in these time series Landsat map images, taken over a section of the central Rocky Mountains near Steamboat Springs, Colorado, provide information about canopy lost to...

Assisting countries in the development of statistically valid estimates of forest attributes

Paul Patterson, RMRS Inventory & Analysis statistician, presenting during the R and Open Foris Calc Workshop in Lima, Peru

The USDA Forest Service Forest Inventory and Analysis program utilizes 100 years of knowledge and experience acquired through inventorying American forests to help countries establish national...