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

Supplementation with lasalocid three times weekly to stocker cattle on pasture

Creator:: DelCurto, Timothy
Abstract:: Two experiments were conducted to study the efficacy of feeding lasalocid to cattle on pasture on a three times weekly basis. In experiment 1, 72 crossbred yearling steers were stratified across a randomized block design of 12 pens including three replications of four treatments. Treatments consisted of: (1) .45 kg...
Resource Type:: Masters Thesis

Short-term responses of native bees to livestock and implications for managing ecosystem services in grasslands

Creator:: Kimoto, Chiho, DeBano, Sandra J., Thorp, Robbin W., Taylor, Robert V., Schmalz, Heidi, DelCurto, Timothy, Johnson, Tracey, Kennedy, Patricia L., and Rao, Sujaya
Abstract:: Rangelands are significant providers of ecosystem services in agroecosystems world‐wide. Yet few studies have investigated how different intensities of livestock grazing impact one important provider of these ecosystem services—native bees. We conducted the first large‐scale manipulative study on the effect of a gradient of livestock grazing intensities on native bees...
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

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

Species Composition and Diversity on Northwestern Bunchgrass Prairie Rangelands

Creator:: Darambazar, Enkhjargal, DelCurto, Timothy, Damiran, Daalkhaijav, Clark, Abe, and Taylor, Robert
Abstract:: Management and conservation of rangelands are increasingly concerned with maintaining productivity, species composition, and diversity of native plant communities. We estimated aboveground annual productivity, species composition, and diversity of a native bunchgrass type community across 1152, 0.5 m2 plots at The Nature Conservancy’s Zumwalt Prairie Preserve in northeastern Oregon. Standing...
Resource Type:: Research Paper

Visual Obstruction: Weight Technique for Estimating Production on Northwestern Bunchgrass Prairie Rangelands

Creator:: Damiran, Daalkhaijav, DelCurto, Timothy, Darambazar, Enkhjargal, Clark, Abe A., Kennedy, Patricia L., and Taylor, Robert
Abstract:: The estimation of standing crop is important in the management of rangeland resources. Direct measurements by clipping, drying, and weighing of herbaceous vegetation are time-consuming and labor-intensive. Therefore, non-destructive methods for efficiently and accurately estimating standing crop are needed in rangeland forage management. We assessed a visual obstruction (VO) technique...
Resource Type:: Research Paper

Estimating Shrub Forage Yield and Utilization Using a Photographic Technique

Creator:: Damiran, Daalkhaijav, DelCurto, Timothy, Johnson, Douglas, Findholt, Scott, and Johnson, Bruce
Abstract:: We assessed a photographic technique to estimate shrub yield and utilization of common snowberry, snowbrush, and heart-leafed willow found in mixed-conifer rangelands. We determined the correlation between green leaf area size (LA) and forage yield (Y) and compared plant utilization estimated by photographic technique (ULA) to actual utilization (UY) values....
Resource Type:: Research Paper

Diet composistion, dry matter intake, and diet overlap of mule deer, elk, and cattle

Creator:: Findholt, Scott, Johnson, Bruce, Damiran, Daalkhaijav, DelCurto, Timothy, and Kie, John
Abstract:: Mule deer (Odocoileus hemionus), elk (Cervus elaphus), and cattle share rangelands throughout much of interior western North America. Considerable debate exists about the degree to which facilitation or competition occurs for forage between these three species (Nelson 1982, Wisdom and Thomas 1996, Miller 2002). Prior cattle grazing can have beneficial...
Resource Type:: Research Paper

Changes in Forage Quantity and Quality with Continued Cattle Grazing in a Mountain Riparian Pasture

Creator:: Darambazar, Enkhjargal, DelCurto, Timothy, Ackerman, Callan, Pulsipher, Gary, and Damiran, Daalkhaijav
Abstract:: The objective of this study was to evaluate changes in the quantity, quality, and moisture of available forage in a riparian pasture, and shrub utilization by cattle during a 30-d late summer grazing period. A riparian pasture (44.7 ha) in northeast of Oregon was grazed with 30 yearlings (419 kg,...
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

Supplementation with lasalocid three times weekly to stocker cattle on pasture

Short-term responses of native bees to livestock and implications for managing ecosystem services in grasslands

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

Eastern Oregon Agricultural Research Center Union Station centennial celebration

Species Composition and Diversity on Northwestern Bunchgrass Prairie Rangelands

Visual Obstruction: Weight Technique for Estimating Production on Northwestern Bunchgrass Prairie Rangelands

Estimating Shrub Forage Yield and Utilization Using a Photographic Technique

Diet composistion, dry matter intake, and diet overlap of mule deer, elk, and cattle

Changes in Forage Quantity and Quality with Continued Cattle Grazing in a Mountain Riparian Pasture

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