Life Sciences Commons^™

Forest Canopies: Form And Functional Relationships, Steven B. Jack

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forest canopy structure is strongly influenced by stand density due to changing competitive interactions among the individual trees and in turn directly influences stemwood volume production. The structure and dynamics of forest canopies, particularly in relation to the production of stemwood, were examined in unmanaged, even-aged stands of two dissimilar tree species, Pinus contorta var. latifolia Engelm. and Abies lasiocarpa (Hook.) Nutt. The analysis of structure-production relationships was guided by a conceptual model which generated hypotheses and led to examination of assumptions incorporated in the model.

Mean crown dimensions were related to stand density through a negative exponential function for …

Visitor Characteristics And Attitudes Toward Policies In The Irish Wilderness Of Southern Missouri, Debra Lynn Bumpus

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Questionnaires which assessed attitudes toward wilderness policies and behavioral norms were distributed to individuals at the Irish Wilderness, in the surrounding communities, and to conservation groups. Questions were designed to describe general wilderness policies and also those policies specific to the Irish Wilderness. The Irish Wilderness, located in southeastern Missouri, was designated as a national wilderness area in 1984. Prior to this 1986 study, no previous studies had been conducted in the area to describe visitor characteristics and attitudes toward wilderness management policies. A comparison was also made between the attitudes of the Irish Wilderness visitor and of Pacific Northwest …

Disease Resistance In A Wild System:Hypoxylon Canker Of Aspen, Michael E. Ostry, N.A. Anderson

Aspen Bibliography

No abstract provided.

Commercial-Scale Vegetative Propagation Of Aspens, R.B. Hall, J.P. Colletti, R.C. Schultz, R.R. Faltonson, S.H. Kolison, Jr., R.D. Hanna, T.D. Hillson, J.W. Morrison

Aspen Bibliography

The commercial potential for clonally propagated hybrid aspens (Populus alba x P. grandidentata) is substantial, but planting stock has not been readily available.

Aspen Wood Products Utilization: Impact Of The Lake States Composites Industry, John A. Youngquist, Henry Spelter

Aspen Bibliography

The utilization of Lake States aspen for value-added products has increased dramatically in the last 15 to 18 years. This paper reviews aspen utilization for solid and composite wood products since 1970, discusses the forecasted future demand for wood-based composites, and reviews research that may influence future utilization of aspen in the Lake States.

Development Of An Aspen Sucker Stand Following Irrigation And Fertilization, G.W. Wyckoff, D.W. Einspahr, M.K. Benson

Aspen Bibliography

A 16-18 year-old aspen stand was harvested in 1969. Aerial biomass components were determined and soils evaluated. Treatments of fertilizer, irrigation, fertilizer + irrigation and control were applied over a seven year period following harvest. Stand measurements were taken periodically over 18 years. Fertilization produced growth increases of 45-55 percent. Height, diameter, and stems per acre were affected by treatments. Guidelines for fertilizer application were developed from leaf tissue analysis.

Aspen Thinning As A Viable Cultural Tool, B.S. Jones, W.E. Berguson, J.J. Vogel

Aspen Bibliography

No abstract provided.

Aspen Ecology And Management In The Western United States, Norbert V. Debyle

Aspen Bibliography

Quaking aspen occurs on more than seven million acres of the interior western United States. It is seral in most sites, usually giving way to more shade-tolerant conifers. Regeneration is almost exclusively by root suckering -- seedlings are a rarity. Discrete clones that occupy several acres are the rule on mountainous western landscapes. Management practices reflect the values of this ecosystem. These values, in decreasing order of importance, are: livestock forage, wildlife habitat, watershed cover, esthetics and recreation, and wood products. Wood products are gaining in importance, thus encouraging more active management of this important type.

Aspen Site Index As Related To Plant Indicators, D.K. Walters, J.P. Sloan, V. Kurmis

Aspen Bibliography

Eighty-five fully stocked, even-aged, aspen stands representing a wide range of ages were examined. Using published site index equations, the site index of these stands was estimated. A second available indicator of the site quality was the soil productivity group used by the Soil Survey. Each of these site quality indicators was related to synecological coordinates (moisture, nutrient, heat, light) of 85 stands. In this case, synecological coordinates were identified through the use of indicator plant species (synecological coordinates).

Opportunities For Aspen For Furniture, H.W. Reynolds, P.K. Donahue

Aspen Bibliography

No abstract provided.

Developing Tissue Culture Systems For Increasing The Disease Resistance Of Aspen, M. Ostry, B. Bucciarelli, S. Sain, W.P. Hackett, N.A. Anderson

Aspen Bibliography

No abstract provided.

Opportunities For Aspen And Balsam Poplar Utilization In Alberta, B.W. Karaim, E.M. Wengert, T. Szabo

Aspen Bibliography

No abstract provided.

Management Of Aspen For Ruffed Grouse And Other Wildlife - An Update, Gordon W. Gullion

Aspen Bibliography

No abstract provided.

An Introduction To Market Aspen Bleached Chemi-Thermomechanical Pulp, D.A. Cheyne

Aspen Bibliography

No abstract provided.

Pine Hollow Exclosures: Effect Of Browsing On An Aspen Community Sprayed With 2,4-D, D.L. Bartos, R.O. Harniss

Aspen Bibliography

The Pine Hollow aspen (Populus tremuloides) exclosures on the Ashley National Forest in eastern Utah were sampled in 1984, 19 years after they were established.

Behavioral And Thermoregulatory Responses Of Moose To High Ambient Temperatures And Insect Harassment In Aspen-Dominated Forests, Lyle A. Renecker, Robert J. Hudson

Aspen Bibliography

Heart rate and insect annoyance were studied in hand-reared adult moose (Alces alces) cows released into a 65-ha enclosure in April, May, July, and October. Radiant heat load exerted the greatest influence on heart rates of bedded moose in all months. Wind and insects had lesser, but significant effect during April and May, respectively. Respiratory rate was related to ambient temperature showing a dramatic increase about 14℃.

Nutrient Cycling In Aspen Ecosystems, John Pastor

Aspen Bibliography

No abstract provided.

Structural Lumber From Aspen: Using The Saw-Dry-Rip (Sdr) Process, Robert R. Maeglin

Aspen Bibliography

No abstract provided.

Development And Application Of A State-Wide Empirical Growth And Yield Model For Natural Aspen Stands, D.K. Walters, A.R. Ak

Aspen Bibliography

No abstract provided.

Management Of Aspen In The Central Rocky Mountains: An Application Of Multiple Use Silviculture, Wayne D. Shepperd

Aspen Bibliography

No abstract provided.

Opportunities For Organosolv Pulping Of Aspen, J.H. Lora

Aspen Bibliography

No abstract provided.

Aspen Utilization In The Northern United States, D.I. Maass, L.C. Irland, S.D. Salisbury

Aspen Bibliography

Aspen is an important resource to the northern United States and in Quebec and Ontario. Roundwood use for pulp in the Lake States has remained stable at 2 million cords since 1981, while use for flakeboard has increased five-fold. Despite the near doubling of use in this decade, real stumpage prices for aspen have remained stable, and the mill delivered prices have declined. The pulp industry is less cost and supply sensitive than the flakeboard industries. Substitutions of other species will occur when aspen supply declines. Resource decisions in the future will be driven by both markets and politics.

Introduction To Symposium And The Aspen Resource Study, R.D. Adams, J.S. Gephart

Aspen Bibliography

No abstract provided.

A Survey Of The Harvesting Histories Of Some Poorly Regenerated Aspen Stands In Northern Minnesota, P.C. Bates, C.R. Blinn, A.A. Alm

Aspen Bibliography

No abstract provided.

Sorting Aspen Bolts And Drying Aspen Flitches For Sdr, R.S. Boone

Aspen Bibliography

Log sorting is necessary when processing aspen saw-dry-rip (SDR) to select optimum log diameter and to minimize number of logs with dark-colored centers. Wetwood, which is difficult to dry, is commonly associated with these dark centers. SDR processing involves drying 7/4- to 8/4-thick live-sawn flitches. Drying the flitch and then sawing studs produces straighter studs than sawing first and drying in stud form. High-temperature kiln drying (230 o F to 240 o F) has given good results with several species (such as, basswood and yellow-poplar). For species likely to contain wetwood (aspen, cottonwood, willow), high-temperature drying is not recommended. A …

The Quest For Aspen Management In Eastern Canada, D.H. Weingartner, R. Doucet

Aspen Bibliography

No abstract provided.

The Lake States' Aspen Resource Revisited: Mid-1960s-1987, J.S. Spencer Jr., E.C. Leatherberry, N.P. Kingsley

Aspen Bibliography

No abstract provided.

Hybrid Popular Productivity And Suitability For The Forest Tent Caterpillar: A Framework Of Evaluation, D.J. Robison, K.F. Raffa

Aspen Bibliography

Fifteen hybrid poplar, Populus spp., clones were evaluated for growth, tolerance to defoliation, and suitability for the forest tent caterpillar, Malacosoma disstria. Poplar clones were ranked according to their suitability for M. disstria, as indicated by behavioral and developmental bioassays. Patterns of poplar growth characteristics and M. disstria preference and performance among the 15 clones were used to construct a productivity - suitability matrix. This matrix provides a framework for evaluating insect pest resistance in selected poplar clones and for considering clonal contributions to poplar-M. disstria interactions. The matrix concept and design incorporates both biologically and …

An Aspen Forest Management Advisory System, H.M. Rauscher, D.A. Perala, G.E. Host

Aspen Bibliography

An expert system program is described that advises the user on silvicultural treatments for aspen (Populus tremuloides Michx., P. grandidentata Michx.) stands of given age, site quality, and stocking.

Silviculture And Management Of Aspen In Canada: The Western Canada Scene, S. Navratil, I.E. Bella, E.B. Peterson

Aspen Bibliography

No abstract provided.