Studies were conducted in the vicinity of Mount Tolman
on the Colville Indian Reservation in eastern Washington in
order to identify vegetation habitat types of the area.
After field studies were completed, Daubenmire's keys to
habitat types of eastern Washington (1968, 1970) were used
to determine habitat types of the area. On the basis of
sampling results, eleven habitat types were identified and
described. This information was used in conjunction with
aerial photointerpretation to prepare a vegetation map.
Daubenmire's baseline studies, from which the habitat
type keys were developed, were conducted in pristine climax
stands. The Mount Tolman study area vegetation has been
subjected to human disturbance for many years. Agriculture,
grazing, logging, mining, and urbanization have all had an
impact on the natural vegetation of the area. It was of
interest to see at what levels of disturbance it would still
be possible to determine habitat types from remnant native
Steppe habitat types identified were Agropyron
spicatum/Festuca idahoensis and Purshia tridentata/Agropyron
spicatum. Very little vegetation representative of these
habitat types remained in the study area because of conversion
of most open land to either agricultural crops or
pasture. Most steppe portions of the study area had been
heavily grazed and supported disclimax vegetation dominated
by Bromus tectorum and other weedy species.
Four Pinus ponderosa habitat types were identified.
They were Pinus ponderosa/Agropyron spicatum, Pinus
ponderosa/Festuca idahoensis, Pinus ponderosa/Purshia tridentata,
and Pinus ponderosa/Symphoricarpos albus. Together
they composed 43 percent of the study area. Three other
forest habitats, Pseudotsuga menziesii/Symphoricarpos albus,
Pseudotsuga menziesii/Physocarpus malvaceus, and Abies
grandis/Pachistima myrsinites, occupied 30 percent of the
Two riparian habitat types occurred consistently in the
creek drainages. One of these was Crataegus douglasii/
Symphoricarpus albus, both the Crataegus phase, and Populus
tremuloides phase; the other was Alnus incana/Lysichitum
Using Daubenmire's keys, coupled with information about
seral communities and successional patterns, proved to be
effective in determining habitat types in all but the most
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