Index Catalog // ScholarsArchive@OSU

Biomass and fire dynamics in a temperate forest-grassland mosaic: Integrating multi-species herbivory, climate, and fire with the FireBGCv2/GrazeBGC system

Creator:: Riggs, Robert A., Keane, Robert E., Cimon, Norm, Cook, Rachel, Holsinger, Lisa, Cook, John, DelCurto, Timothy, Baggett, L. Scott, Justice, Donald, Powell, David, Vavra, Martin, and Naylor, Bridgett
Abstract:: Landscape fire succession models (LFSMs) predict spatially–explicit interactions between vegetation succession and disturbance, but these models have yet to fully integrate ungulate herbivory as a driver of their processes. We modified a complex LFSM, FireBGCv2, to include a multi-species herbivory module, GrazeBGC. The system is novel in that it explicitly...
Resource Type:: Article

Stocking Rate and Fuels Reduction Effects on Beef Cattle Diet Composition and Quality

Creator:: Clark, Abe, DelCurto, Tim, Vavra, Martin, and Dick, Brian L.
Abstract:: An experiment was conducted to evaluate the influence of forest fuels reduction on diet quality, botanical composition, relative preference, and foraging efficiency of beef cattle grazing at different stocking rates. A split plot factorial design was used, with whole plots (3 ha) being fuel reduced or no treatment (control), and...
Resource Type:: Article

Comparison of Bite-Count and Rumen Evacuation Techniques to Estimate Cattle Diet Quality

Creator:: Damiran, Daalkhaijav, DelCurto, Timothy, Findholt, Scott L., Johnson, Bruce K., and Vavra, Martin
Abstract:: We conducted a study to compare the bite-count technique (BC) of estimating forage intake and synthesized diet quality to direct estimates of diet quantity and quality with the use of the rumen evacuation technique (RE). We used four rumen-fistulated steers to evaluate both techniques. Four enclosures in a mixed-conifer rangeland...
Resource Type:: Article

Effects of ungulate herbivory on aspen, cottonwood, and willow development under forest fuels treatment regimes

Creator:: Endress, Bryan A., Wisdom, Michael J., Vavra, Martin, Parks, Catherine G., Dick, Brian L., Naylor, Bridgett J., and Boyd, Jennifer M.
Abstract:: Herbivory by domestic and wild ungulates can dramatically affect vegetation structure, composition and dynamics in nearly every terrestrial ecosystem of the world. These effects are of particular concern in forests of western North America, where intensive herbivory by native and domestic ungulates has the potential to substantially reduce or eliminate...
Resource Type:: Article

Modification of Mixed-Conifer Forests by Ruminant Herbivores in the Blue Mountains Ecological Province

Creator:: Riggs, Robert A., Tiedemann, Arthur R., Cook, John G., Ballard, Teena M., Edgerton, Paul J., Vavra, Martin, Krueger, William C., Hall, Frederick C., Bryant, Larry D., Irwin, Larry L., and Delcurto, Timothy
Abstract:: Secondary plant succession and the accumulation of biomass and nutrients were documented at seven ruminant exclosures in Abies and Pseudotsuga forests variously disturbed by logging, burning, and grass seeding. Long-term (25 or more years) foraging by Rocky Mountain mule deer (Odocolleus hemionus) and Rocky Mountain elk (Genius elaphus) suppressed the...
Resource Type:: Technical Report

Ecology and plant communities of the riparian area associated with Catherine Creek in northeastern Oregon

Creator:: Kauffman, John Boone, Krueger, William C. (William Clement), 1942-, Vavra, Martin, and Oregon State University. Agricultural Experiment Station
Abstract:: A multitude of biotic and physical factors, many of them unique to riparian environments, interacted to form an extremely complex ecosystem along Catherine Creek in the Wallowa Mountains. A total of 258 stands of vegetation representing 60 communities was identified. At least 20 species of mammals and 81 species of...
Resource Type:: Technical Report

Seasonal forage production and quality on four native and improved plant communities in Eastern Oregon

Creator:: Svejcar, Tony and Vavra, Martin
Abstract:: Seasonal trends in forage quality and production were studied on improved and unimproved portions of four plant communities in eastern Oregon. The range improvements consisted of seeding and/or thinning. Improvement doubled forage production on the lodgepole pine site (thinned but not seeded), tripled production on the grassland and moist meadow...
Resource Type:: Technical Report

Eastern Oregon Agricultural Research Center Union Station centennial celebration

Creator:: Pumphrey, F. V. (Floyd Vance), DelCurto, Timothy, Vavra, Martin, Oregon State University. Agricultural Experiment Station, and Eastern Oregon Agricultural Research Center
Abstract:: Published October 2001. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report

Mt. St. Helens ash : considerations of its fallout on rangelands

Creator:: Sneva, Forrest, Britton, Carlton M., Mayland, H. F., Buckhouse, John, Evans, Raymond A., Young, James A., and Vavra, Martin
Abstract:: Field and laboratory studies were conducted on volcanic ash from Yakima, Moses Lake, Spokane, Washington, and Moscow, Idaho, three weeks after the May 18, 1980, eruption of Mt. St. Helens in southwestern Washington. These studies examined 1) the chemical, physical, and water retentivity properties of the ash, 2) the effect...
Resource Type:: Technical Report

The effect of pre-calving energy level on cow performance

Creator:: Phillips, Ralph L., Vavra, Martin, and Oregon State University. Agricultural Experiment Station
Abstract:: Published April 1980. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report

The effect of winter feed levels on steer production

Creator:: Phillips, Ralph L., Holechek, Jerry, Vavra, Martin, and Oregon State University. Agricultural Experiment Station
Abstract:: Published May 1980. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report

Reports on breeding ewe lambs

Creator:: Vavra, Martin and Oregon State University. Agricultural Experiment Station
Abstract:: Published January 1978. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report

Artificial rearing of lambs

Creator:: Wing, Mark, Phillips, Ralph L., Vavra, Martin, and Oregon State University. Agricultural Experiment Station
Abstract:: Published February 1977. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report

The performance of lambs weaned at two ages

Creator:: McArthur, J. A. B., Vavra, Martin, and Oregon State University. Agricultural Experiment Station
Abstract:: Published December 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report

Botanical composition and diet quality of beef cattle grazing at three stocking rates following fuels reduction in mixed conifer forests

Creator:: Clark, Abe, DelCurto, Timothy, Vavra, Martin, Damiran, Daalkhaijav, and Darambazar, Enkhjargal
Abstract:: Due to the increasing cost and concern of catastrophic wildfires in the Western United States, there is an increasing interest in fuels reduction projects. Fuel reduction treatments utilize various methods of thinning and/or prescribed fire to obtain desirable forest stand conditions. However, the effects of fuels reduction on ecosystem function...
Resource Type:: Research Paper

Species diversity in understory vegetation of transitional forested rangelands in the Blue Mountains of Eastern Oregon

Creator:: Darambazar, Enkhjargal, Damiran, Daalkhaijav, DelCurto, Timothy, Riggs, Robert, Vavra, Martin, and Cook, John
Abstract:: The objective of this study was to quantify understory species diversity response to overstory manipulation of Blue Mountain eco-region forest. Forty nine ecological land units, including differing successional stages (sapling, pole, small saw, and saw log) and canopy cover (light and medium) in dry Grand Fir (Abies grandis), wet Grand...
Resource Type:: Research Paper

Understory production of transitional forested rangelands in the Blue Mountains of Eastern Oregon

Creator:: Darambazar, Enkhjargal, Damiran, Daalkhaijav, DelCurto, Timothy, Riggs, Robert, Vavra, Martin, and Cook, John
Abstract:: The objective of this study was to quantify understory vegetation response to overstory manipulation of Blue Mountain eco-region forest. Forty nine ecological land units, including differing successional stages (sapling, pole, small saw, and saw log) and canopy cover (light and medium) in dry Grand Fir (Abies grandis), wet Grand Fir,...
Resource Type:: Research Paper

ScholarsArchive@OSU

Biomass and fire dynamics in a temperate forest-grassland mosaic: Integrating multi-species herbivory, climate, and fire with the FireBGCv2/GrazeBGC system

Stocking Rate and Fuels Reduction Effects on Beef Cattle Diet Composition and Quality

Comparison of Bite-Count and Rumen Evacuation Techniques to Estimate Cattle Diet Quality

Proceedings 1984 Pacific Northwest range managment short course. Range watersheds, riparian zones and economics: interrelationships in management and use

Effects of ungulate herbivory on aspen, cottonwood, and willow development under forest fuels treatment regimes

Modification of Mixed-Conifer Forests by Ruminant Herbivores in the Blue Mountains Ecological Province

Ecology and plant communities of the riparian area associated with Catherine Creek in northeastern Oregon

Seasonal forage production and quality on four native and improved plant communities in Eastern Oregon

Eastern Oregon Agricultural Research Center Union Station centennial celebration

Mt. St. Helens ash : considerations of its fallout on rangelands

The effect of pre-calving energy level on cow performance

The effect of winter feed levels on steer production

Reports on breeding ewe lambs

Artificial rearing of lambs

The performance of lambs weaned at two ages

Botanical composition and diet quality of beef cattle grazing at three stocking rates following fuels reduction in mixed conifer forests

Species diversity in understory vegetation of transitional forested rangelands in the Blue Mountains of Eastern Oregon

Understory production of transitional forested rangelands in the Blue Mountains of Eastern Oregon

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