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Forest Sciences

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Articles 271 - 300 of 414

Full-Text Articles in Genetics and Genomics

Restoration Of Aspen Woodland Invaded By Western Juniper: Applications Of Partial Cutting And Prescribed Fire, Jonathon D. Bates, Richard F. Miller Aug 2004

Restoration Of Aspen Woodland Invaded By Western Juniper: Applications Of Partial Cutting And Prescribed Fire, Jonathon D. Bates, Richard F. Miller

Aspen Bibliography

Western juniper (Juniperus occidentalis spp. occidentalis) woodlands are rapidly replacing quaking aspen (Populus tremuloides) stands throughout the northern Great Basin. Aspen stands provide important habitat for many wildlife species and contain a high diversity of understory shrubs and herbaceous species. We studies two juniper removal treatments to restore aspen woodlands in Kiger Canyon on Steens Mountain, Oregon.

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Long-Term Environmental Effects Of Conifer Removal To Achieve Aspen Release In Near-Stream Areas Within The Northern Sierras, Kenneth W. Tate, Bobette Jones, Melanie Mcfarland, Tom Rickman, Al Vasquez Jan 2004

Long-Term Environmental Effects Of Conifer Removal To Achieve Aspen Release In Near-Stream Areas Within The Northern Sierras, Kenneth W. Tate, Bobette Jones, Melanie Mcfarland, Tom Rickman, Al Vasquez

Aspen Bibliography

The advanced state of conifer encroachment in aspen stands in the Sierra Nevada and southern Cascades is retarding aspen regeneration, putting an estimated 70 plus percent of stands at immediate risk of extinction with a significant percentage of stands already lost.

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Executive Summary The Role Of Ungulate Herbivory And Management On Ecosystem Patterns And Processes: A Problem Analysis, John G. Kie, Martin Vavra Jan 2004

Executive Summary The Role Of Ungulate Herbivory And Management On Ecosystem Patterns And Processes: A Problem Analysis, John G. Kie, Martin Vavra

Aspen Bibliography

No abstract provided.

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Some Environmental Relationships Of Undergrowth Species In Aspen Communities Of The Intermountain West, W F. Mueggler Jun 2003

Some Environmental Relationships Of Undergrowth Species In Aspen Communities Of The Intermountain West, W F. Mueggler

Aspen Bibliography

This analysis results from an opportunity to explore plant-environmental relationships from data collected for a different purpose. Origin of the data is a study designed to develop an aspen community-type classification for southern Idaho, western Wyoming, Utah, and Nevada which resulted in the publication "Aspen Community Types of the Intermountain Region" GTR INT-250 by W.F. Mueggler (1988).

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Conservation And Restoration Of Pine Forest Genetic Resources In México, C. Sáenz-Romero, Amy E. Snively, R. Lindig-Cisneros Jan 2003

Conservation And Restoration Of Pine Forest Genetic Resources In México, C. Sáenz-Romero, Amy E. Snively, R. Lindig-Cisneros

Student Published Works

Deforestation rates in México are about 670,000 ha/year. This threatens the richness of forest genetic resources in México, causing the disappearance of locally adapted populations and rare and endangered pine species. México is one of the six megadiverse countries in the world, with half of the world’s Pinus species. Pinus is one of the most economically and ecologically important forest genera in México. We suggest that delineation of seed zones and the establishment of a network of Forest Genetic Resource Conservation Units (FGRCUs), linked with forest management and ecological restoration programs will protect this valuable resource. We estimate that FGRCUs …

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Good Intentions May Doom Aspen Groves, James R. Fazio Jan 2003

Good Intentions May Doom Aspen Groves, James R. Fazio

Aspen Bibliography

If there were a Guiness Book of World Records for trees, quaking aspen would be in it - not once but probably several times.

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The Effect Of Aspen Wood Characteristics And Properties On Utilization, Kurt H. Mackes, Dennis L. Lynch Jan 2001

The Effect Of Aspen Wood Characteristics And Properties On Utilization, Kurt H. Mackes, Dennis L. Lynch

Aspen Bibliography

This paper reviews characteristics and properties of aspen wood, including anatomical structure and characteristics, moisture and shrinkage properties, weight and specific gravity, mechanical properties, and processing characteristics. Uses of aspen are evaluated: sawn and veneer products, composite panels, pulp, excelsior, post and poles, animal bedding, animal food supplements, fuel applications, and novelties. Aspen is a preferred species for paneling, veneer products including matchsticks and chopsticks, waferboard and oriented strandboard (OSB), fiberboard, pulp, excelsior, research animal bedding, animal food supplements, and tourist or gift items.

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An Investigation Of Crystalline Intensity Of The Wood Of Poplar Clones Grown In Jiangsu Province, China, Bernard R. Parresol, Fuliang Cao May 1998

An Investigation Of Crystalline Intensity Of The Wood Of Poplar Clones Grown In Jiangsu Province, China, Bernard R. Parresol, Fuliang Cao

Aspen Bibliography

No abstract provided.

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Parade Of Presidents, John L. Artz Jan 1997

Parade Of Presidents, John L. Artz

Aspen Bibliography

No abstract provided.

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Stand Hazard Rating For Central Idaho Forests, Robert Steele, Ralph E. Williams, Julie C. Weatherby, Elizabeth D. Reinhardt, James T. Hoffman, R. W. Thier Jan 1996

Stand Hazard Rating For Central Idaho Forests, Robert Steele, Ralph E. Williams, Julie C. Weatherby, Elizabeth D. Reinhardt, James T. Hoffman, R. W. Thier

Aspen Bibliography

No abstract provided.

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Fire-Bgc--A Mechanistic Ecological Process Model For Simulating Fire Succession On Coniferous Forest Landscapes Of The Northern Rocky Mountains, Robert E. Keane, Penelope Morgan, Steven W. Running Jan 1996

Fire-Bgc--A Mechanistic Ecological Process Model For Simulating Fire Succession On Coniferous Forest Landscapes Of The Northern Rocky Mountains, Robert E. Keane, Penelope Morgan, Steven W. Running

Aspen Bibliography

An ecological process model of vegetation dynamics mechanistically simulates long-term stand dynamics on coniferous landscapes of the Northern Rocky Mountains. This model is used to investigate and evaluate cumulative effects of various fire regimes, including prescribed burning and fire exclusion, on the vegetation and fuel complex of a simulation landscape composed of many stands. Detailed documentation of the model FIRE-BGC (a FIRE BioGeoChemical succession model) with complete discussion of all model parameters is followed with results of an application of the FIRE-BGC to a whitebark pine landscape in the Bob Marshall Wilderness Complex. Simulation results of several management scenarios are …

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Waste-Wood-Derived Fillers For Plastics, Brent English, Craig M. Clemons, Nicole Stark, James P. Schneider Jan 1996

Waste-Wood-Derived Fillers For Plastics, Brent English, Craig M. Clemons, Nicole Stark, James P. Schneider

Aspen Bibliography

Filled thermoplastic composites are stiffer, stronger, and more dimensionally stable than their unfilled counterparts. Such thermoplastics are usually provided to the end-user as a precompounded, pelletized feedstock. Typical reinforcing fillers are inorganic materials like talc or fiberglass, but materials derived from waste wood, such as wood flour and recycled paper fiber, are also effective as fillers. The goal of this project was to generate commercial interest in using waste-wood–paper-derived fillers (WPFs) to reinforce thermoplastics. The research strategy was twofold: developmental research and outreach. Specific objectives were (1) to improve wastepaper fiber preparation, feeding, and compounding methods, and optimize composite performance, …

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Soldier's Guide To Wildlands Of Camp W. G. Williams, Thomas Hysell, Margaret Pettis Jan 1996

Soldier's Guide To Wildlands Of Camp W. G. Williams, Thomas Hysell, Margaret Pettis

Aspen Bibliography

No abstract provided.

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Plant Community Changes Over 54 Years Within The Great Basin Experimental Range, Manti-La Sal National Forest, Scott C. Walker, David K. Mann, E. Durant Mcarthur May 1995

Plant Community Changes Over 54 Years Within The Great Basin Experimental Range, Manti-La Sal National Forest, Scott C. Walker, David K. Mann, E. Durant Mcarthur

Aspen Bibliography

Plant community changes and natural succession over time impact forage values, watershed quality, wildlife habitat, and ecosystem dynamics. Comparisons were made between a vegetation map of community types completed in 1937 by the U.S. Forest Service, and vegetation maps compiled in 1990 of the same areas by satellite imagery, and through 1991 areal photo interpretation combined with ground truthing. The study area includes nearly all of the drainage in Ephraim Canyon located in central Utah which consists of 6,027 acres (2,439 ha). Elevation ranges from 6,600 to 10,400 feet (2,040 to 3,210 m). Vegetation types ranged from pinyon-juniper woodland through …

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Southern Idaho's Forest Land Outside National Forests, 1991, David C. Chojnacky Jan 1995

Southern Idaho's Forest Land Outside National Forests, 1991, David C. Chojnacky

Aspen Bibliography

No abstract provided.

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Pulpwood Production In The Lake States, 1993, Ronald J. Piva Jan 1995

Pulpwood Production In The Lake States, 1993, Ronald J. Piva

Aspen Bibliography

Pulpwood production in the Lake States increased from 8.8 million cords in 1992 to 9.4 million cords in 1993. Michigan, Minnesota, and Wisconsin pulpwood production is shown by county and species group.

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Use Of Sulfometuron In Hybrid Popular Energy Plantations, Daniel A. Netzer Jan 1995

Use Of Sulfometuron In Hybrid Popular Energy Plantations, Daniel A. Netzer

Aspen Bibliography

No abstract provided.

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Biomass Of Food Available To Beavers On Five Minnesota Shrubs, Richard R. Buech, David J. Rugg Jan 1995

Biomass Of Food Available To Beavers On Five Minnesota Shrubs, Richard R. Buech, David J. Rugg

Aspen Bibliography

No abstract provided.

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Proceedings Of A Symposium On Sustaining Rangeland Ecosystems, W. Daniel Edge, Sally L. Olson-Edge Aug 1994

Proceedings Of A Symposium On Sustaining Rangeland Ecosystems, W. Daniel Edge, Sally L. Olson-Edge

Aspen Bibliography

No abstract provided.

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Sustaining Our Aspen Heritage Into The Twenty-First Century, Charles W. Cartwright, Denver P. Burns Jan 1994

Sustaining Our Aspen Heritage Into The Twenty-First Century, Charles W. Cartwright, Denver P. Burns

Aspen Bibliography

No abstract provided.

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Population Regulation Of The Jackson Elk Herd, Bruce L. Smith Jan 1994

Population Regulation Of The Jackson Elk Herd, Bruce L. Smith

Aspen Bibliography

No abstract provided.

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Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson Jan 1993

Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson

Aspen Bibliography

No abstract provided.

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Cliff Lake Bench Research Natural Area: Problems Encountered In Monitoring Vegetation Change On Mountain Grasslands, Walter F. Mueggler Jan 1992

Cliff Lake Bench Research Natural Area: Problems Encountered In Monitoring Vegetation Change On Mountain Grasslands, Walter F. Mueggler

Aspen Bibliography

No abstract provided.

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Armillaria Root Rot In The Canadian Prairie Provinces, K. I. Mallett Jan 1992

Armillaria Root Rot In The Canadian Prairie Provinces, K. I. Mallett

Aspen Bibliography

No abstract provided.

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Deer And Forestry In Germany: Half A Century After Aldo Leopold, Michael L. Wolfe, Friedrich-Christian V. Berg May 1988

Deer And Forestry In Germany: Half A Century After Aldo Leopold, Michael L. Wolfe, Friedrich-Christian V. Berg

Aspen Bibliography

No abstract provided.

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Clonal Foraging In Perennial Wheatgrasses: A Strategy For Exploiting Patchy Soil Nutrients, L. D. Humphrey, D. A. Pyke Oct 1987

Clonal Foraging In Perennial Wheatgrasses: A Strategy For Exploiting Patchy Soil Nutrients, L. D. Humphrey, D. A. Pyke

Aspen Bibliography

1 Foraging by means of plasticity in placement of tillers in response to low- and high- nutrient patches was examined in the rhizomatous wheatgrass Elymus lanceolatus ssp. lanceolatus. Its ability to exploit soil nutrient patches was compared to that of the closely related but caespitose E. lanceolatus ssp. wawawaiensis. 2 Clones of 14 genets of each taxon were planted in boxes consisting of two 30 x 30 cm cells: the 'origin cell' where clones were planted, and the adjacent 'destination cell', with each cell containing soil with either low or high levels of nutrients. 3 The rhizomatous taxon, which can …

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Characteristics Of Successful Competitors: An Evaluation Of Potential Growth Rate In Two Cold Desert Tussock Grasses, Eissenstat D. M., Caldwell M. M. Jan 1987

Characteristics Of Successful Competitors: An Evaluation Of Potential Growth Rate In Two Cold Desert Tussock Grasses, Eissenstat D. M., Caldwell M. M.

Aspen Bibliography

Within the first few weeks after seedling emergence, Agropyron desertorum, a more competitive tussock grass, had a much higher mean relative growth rate (RGR) than Agropyron spicatum, a very similar, but less competitive species. However, beyond the early seedling stage, the two grasses had a remarkably similar whole-plant RGR in hydroponic culture and aboveground RGR in glasshouse soil, if root temperatures were above approximately 12° C. At soil temperatures between 5 and 12° C, A. desertorum exhibited a 66% greater aboveground RGR than A. spicatum (P < 0.05). Both species responded similarly to warming soil temperatures. In the field, however, tiller growth rates were generally similar. Neither species showed marked tiller elongation until a couple of weeks after snowmelt, by which time soil temperatures, at least to a depth of 10 cm, were above 12° C for a significant portion of the day. Above-ground biomass accumulation over a three-year period indicated that both grasses had similar potential growth rates whereas Artemisia tridentata ssp. vaseyana, a common neighbor planted in the same plots, had a much greater potential growth rate. The greater competitive ability of adult A. desertorum, as compared to A. spicatum, cannot be attributed to appreciable differences in potential growth rates.

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Relationships Among Aspen, Fungi, And Ungulate Browsing In Colorado And Wyoming, John H. Hart Jan 1986

Relationships Among Aspen, Fungi, And Ungulate Browsing In Colorado And Wyoming, John H. Hart

Aspen Bibliography

No abstract provided.

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Public Response To "Guidelines For Managing Aspen", Norbert V. Debyle Jan 1985

Public Response To "Guidelines For Managing Aspen", Norbert V. Debyle

Aspen Bibliography

No abstract provided.

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Guidelines For Managing Aspen, The Aspen Panel Jan 1985

Guidelines For Managing Aspen, The Aspen Panel

Aspen Bibliography

No abstract provided.

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