Forest Response to Anthropogenic Stress

Project Description
The Forest Responses to Anthropogenic Stress (FORAST) project
was designed (1) to determine whether evidence of alterations of
long-term growth patterns of several species of eastern forest
trees was apparent in tree-ring chronologies from within the
region and (2) to identify environmental variables that were
temporally or spatially correlated with any observed
changes. The project was supported principally by the
U.S. Environmental Protection Agency (EPA) with additional
support from the National Park Service.

The FORAST project was initiated in 1982 as exploratory research
to document patterns of radial growth of forest trees during the
previous 50 or more years within 15 states in the northeastern
United States. Radial growth measurements from more than 7000
trees are provided along with data on a variety of measured and
calculated indices of stand characteristics (basal area,
density, and competitive indices); climate (temperature,
precipitation, and drought); and anthropogenic pollutants (state
and regional emissions of SO2 and NOx, ozone monitoring data,
and frequency of atmospheric-stagnation episodes and atmospheric
haze). These data were compiled into a single database to
facilitate exploratory analysis of tree growth patterns and
responses to local and regional environmental conditions.

For more information, link to