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.

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1987

Effect of Initial Stand Density on End-of-Rotation First Log Quality Characteristics of Lodgepole Pine, Louis A. Ballard

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Corrections for Effusion from Gas-Permeable Enclosures for the Determination of Low N2(C2H2) Fixation Rates in Situ, I Borjesson; Soil Biology and Biochemistry

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The Association of Seed and Cone Predator Populations and Cone Crop Production in Engelmann Spruce, Dawn E. Cameron

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Impact of the Western Spruce Budworm (Lepidoptera: Tortricidae) on Buds, Developing Cones, and Seeds of Douglas-fir in West Central Idaho, C J. Frank and M J. Jenkins; Environmental Entomology

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Dinitrogen Fixation in a Montane Forest Sere Determined by 15N2 Assimilation and in situ Acetylene-Reduction Methods, J C. Skujiņš, C C. Tann, and I Börjesson; Soil Biology and Biochemistry

Elk Hiding and Thermal Cover Guidelines in the Context of Lodgepole Pine Stand Density, Frederick W. Smith and James N. Long; Western Journal of Applied Forestry

1986

Stem Mechanics as a Theoretical Basis for the Self-Thinning Rule, Thomas J. Dean

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Validity of Constant-Stress and Elastic-Instability Principles of Stem Formation in Pinus contorta and Trifolium pratense, T J. Dean; Annals of Botany

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Variation in Sapwood Area-Leaf Area Relations Within Two Stands of Lodgepole Pine, T. J. Dean and J. N. Long; Forest Science

Investigation of Host Selection by Mountain Pine Beetle (Dendroctonus ponderosae) Hopk. in Lodgepole Pine (Pinus contorta) Dougl., Thomas J. Eager

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First- and Second- Year Survival of Containerized Engelmann Spruce in Relation to Initial Seedling Size, Franklin D. Hines and James N. Long; Canadian Jorunal of Forest Research

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Sapwood Area of Pinus contorta Stands as a Function of Mean Size and Density, James N. Long and Thomas J. Dean; Oecologia

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A Lodgepole Pine Density Management Diagram, James B. McCarter and James N. Long; Western Journal of Applied Forestry

Relative Tolerance: A Test of Some Indirect Criteria, Joy N. Parker

Nitrogen Fixation and Allelopathy in Arid and Forest Soils in the Western United States, C C. Tann

1985

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Insect Communities and Faunas of a Rocky Mountain Subalpine Sere, David J. Schimpf and James A. MacMahon; Great Basin Naturalist

Preferences of Red-Backed Voles and Deer Mice for Differing Structural Habitats, Alice P. Wywialowski

1984

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A Preliminary Quantification of the Impacts of Aspen to Conifer Succession on Water Yield - II. Modeling Results, Gerald F. Gifford, William Humphries, and Richard A. Jaynes; Water Resources Bulletin

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A Preliminary Quantification of the Impacts of Aspen to Conifer Succession on Water Yield - I. Heat Pulse Methodology for Model Calibration, Gerald F. Gifford, William Humphries, and Richard A. Jaynes; Water Resources Bulletin

Patterns of Soil Loss and Snowmelt from an Intermountain Rangeland Site, Steven A. Loomis

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Average Seasonal Phytomass: A Temporally Independent Index of Herbaceous Plant Dominance, N E. West and G A Reese; Vegetatio

1983

Rhizosphere N2 Fixation in a Forest Ecosystem in situ Assays and Evaluation of the Acetylene Reduction Technique on the Utah State University Forest, Inger Borjesson

The Effects of Initial Size on Subsequent Performance in Container Grown Engelmann Spruce Seedlings, Franklin D. Hines

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Reproductive Attributes of Some Rocky Mountain Subalpine Herbs in Successional Context, David J. Schimpf and Robert L. Bayn Jr.; Great Basin Naturalist

1982

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Belowground Herbivory: The Adaptive Geometry of Geomyid Burrows, Douglas C. Andersen; American Naturalist

Plant Spacing: A Size Sensitive Model with Implications for Competition, Robert L. Bayn Jr.

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Selective Extinction and Speciation: Their Influence on the Structure and Functioning of Communities and Ecosystems, Charles W. Fowler and James A. MacMahon; American Naturalist

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Erosion from Melt of a Mountain Snowpack, George E. Hart and Steven A. Loomis; Journal of Soil and Water Conservation

Correlation of Heat Pulse Velocity Measurements and Transpiration for Aspen, Engelmann Spruce and Subalpine Fir in Northern Utah, William E. Humphries

Nitrogen Accretion in a Rocky Mountain Subalpine Succession, Kathleen E. Mead

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Soil Biological Properties of a Montane Forest Sere: Corroboration of Odum's Postulates, J Skujins and B Klubek; Soil Biology and Biochemistry

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Drought-Induced Changes in Avian Community Structure Along a Montane Sere, Kimberly G. Smith; Ecology

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Food, Predation, and Reproductive Ecology of the Dark-Eyed Junco in Northern Utah, Kimberly G. Smith and Douglas C. Andersen; The Auk

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Snowshoe Hare Cover Relationships in Northern Utah, Michael L. Wolfe, Norbert V. Debyle, Clark S. Winchell, and Thomas R. McCabe; Journal of Wildlife Management

1981

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Population Dynamics and Bioenergetics of a Fossorial Herbivore, Thomomys talpoides (Rodentia: Geomyidae), in a Spruce-Fir Sere, Douglas C. Andersen and James A. MacMahon; Ecological Monographs

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ATP Concentration and Soil Respiration at Reduced Water Potentials in Arid Soils, W G. Knight and J Skujins; Soil Science Society of America Journal

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An Organism-Centered Approach to Some Community and Ecosystem Concepts, James A. MacMahon, David J. Schimpf, Douglas C. Andersen, Kimberly G. Smith, and Robert L. Bayn Jr.; Journal of Theoretical Biology

The Use of Reineke's Stand-Density Index for Uneven-Aged Timber Management, Douglas H. Page

Avian Resource Partitioning Along a Montane Sere, Kimberly G. Smith

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Bird Communities along a Montane Sere: Community Structure and Energetics, Kimberly G. Smith and James A. MacMahon; The Auk

1980

Population Dynamics and Bioenergetics of a Fossorial Rodent, the Northern Pocket Gopher (Themomys talpoides), in a Spruce-Fir Ecosystem, Douglas C. Andersen

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Herbivorous Mammals Along a Montane Sere: Community Structure and Energetics, Douglas C. Andersen, James A. MacMahon, and Michael L. Wolfe; Journal of Mammalogy

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Evaluation of Double-Sampling Estimators of Subalpine Herbage Production, Gary A. Reese, Robert L. Bayn, and Neil E West; Journal of Range Management

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Some Aspects of Succession in the Spruce-Fir Forest Zone of Northern Utah, David J. Schimpf, Jan A. Henderson, and James A. MacMahon; Great Basin Naturalist

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Nongame Birds of the Rocky Mountain Spruce- Fir Forests and Their Management, Kimberly G. Smith; Workshop Proceedings: Management of Western Forests and Grasslands for Nongame Birds

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Infection of Engelmann-Spruce Seed by Geniculodendron pyriforme in Western North America, M W. Wicklow-Howard; Mycologia

1979

Pollination Dynamics in Two Subalpine Flower Meadows, Peter Andrew Beelow III

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Effects of Clearcutting on Soil Water Depletion in an Engelmann Spruce Stand, George E. Hart and David A. Lomas; Water Resources Research

An Investigation of the Environmental Relationships of Selected Forest Habitat Types in Northern Utah, Penelope Morgan Lawton

Diversity and Production of Herbaceous Vegetation in a Northern Utah Subalpine Chronosequence, Gary A. Reese