Accessing Phase 3 Data
Below are links to download files for the 1991-1999 Forest Health
Monitoring data. They are organized by State, Indicator, and Year.
|FHM Download Files
Ecoregion Hierarchy information to interpret the ECOSUBCD attribute
on the PLOT table in the database, along with the ecoregion
file itself, can be retrieved here.
Forest Health Monitoring Program History
FHM plot measurements began in New England in 1990. The program expanded the next year to include some
Mid-Atlantic and Southern states, and, thereafter, more states were steadily added each year
(see History_fhm_activities.xls for
details on FHM plot work). The original forest health indicators included: crown condition, tree damage, and mensuration.
Other indicators, such as ozone, lichens, and soils, were introduced in subsequent years. Methods for vegetation
diversity and down woody material were tested and developed (therefore, these data are not publicly available).
FIA Phase 3 (Forest Health) Data
Starting in 2000, the Forest Inventory and Analysis (FIA) program, in addition to the conversion from periodic
to annual surveys, added the suite of forest health measurements to a subset of the sample locations. This subset,
referred to as the Phase 3 (P3) sample, consists largely of the measurements and plots which formerly comprised the
plot component of the Forest Health Monitoring (FHM) program. The P3 forest health indicators include data on
tree damage, crown condition, presence of ozone damage, lichen species diversity, soils, and down woody material.
A seventh set of measurements pertaining to total vegetative diversity is in development.
Data for the P3 component of the Annual FIA program is available through the FIA
DataMart page. Please note that the
annual inventory program was implemented gradually across the US, starting with about a dozen states in 2000, with
increased participation every year thereafter.