T.W. Daniel Experimental Forest
General Information
The TWDEF is in the Wasatch Mountains of northern Utah about 15 km south of the Utah-Idaho border and about 65 km east of Logan. It is comprised of four sections (sec. 15, 16, 21 and 22, Township 13 North, Range 4 East, Salt Lake Meridian). Utah State University owns one of the sections; the remainder are part of the Logan Ranger District of the Cache National Forest. Access to within 8 km of the experimental forest is via Highway 89. Access to the boundary and within the forest is on unpaved but excellent forest road which bisects the forest north to south; the remainder of the forest is accessed via primitive roads and trails. Winter access is limited to skis or snow machine.
Engelmann spruce (Picea engelmannii) and subalpine fir (Abies lasiocarpa) are the dominant late successional species throughout the forest. The major early successional species include lodgepole pine (Pinus contorta var. latifolia) and aspen (Populus tremuloides), with Douglas-fir (Pseudotsuga menziesii) and limber pine (Pinus flexilis) on south-facing ridges and at lower elevations. The aspen and conifer stands are interspersed with meadows and shrub-forb-grass uplands.
Selected Research
Forest, snow, soil and climate processes
Conifer stand development and production ecology
Disturbance ecology
Silviculture
Selected Education
The forest is intensively used for teaching and demonstration.
Contact Information
Prof. James N. Long
Wildland Resources Department
College of Natural Resources
Utah State University
Logan, UT 84322-5230
james.long@usu.edu
Location
42 N 111 W
Size
1,036 hectares
Elevation range
2400-2650 m
Annual Precipitation
950 mm
Average Minimum and Maximum Annual Temperatures
Average Minimum: -10° C
Average Maximum: 14° C
Facilities
Rustic cabin on site
Personnel
no on-site manager
Databases
Weather stations record air temperature, humidity, snow depth, soil moisture, and sundry other quantities. An eddy covariance system records atmospheric fluxes.
A SNOTEL site installed in July 2007.
Bibliography of published results containing citations for journal papers, theses and dissertations.
Established
1936