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• 1. [Article] Western Juniper (Juniperus occidentalis) distribution, Bear Creek Buttes, Deschutes County, Oregon: some possible ecological and cultural influences

  Citation × Citation Citation Abstract Copy Title: Western Juniper (Juniperus occidentalis) distribution, Bear Creek Buttes, Deschutes County, Oregon: some possible ecological and cultural influences Author: Frates, Dennis Marshall Title: Western Juniper (Juniperus occidentalis) distribution, Bear Creek Buttes, Deschutes County, Oregon: some possible ecological and cultural influences Author: Frates, Dennis Marshall Close

• 2. [Article] The-island_nnl_evaluation_final.pdf

  Citation × Citation Citation Abstract Copy Title: The-island_nnl_evaluation_final.pdf Author: Murray, Michael, Kagan, James S., Schuller, Reid Title: The-island_nnl_evaluation_final.pdf Author: Murray, Michael, Kagan, James S., Schuller, Reid Close

• 3. [Article] The_Island.pptx

  Citation × Citation Citation Abstract Copy Title: The_Island.pptx Author: Schuller, Reid, Kagan, James S., Murray, Michael Title: The_Island.pptx Author: Schuller, Reid, Kagan, James S., Murray, Michael Close

• 4. [Article] Evaluation of The Island Jefferson County, Oregon for its merit in meeting national significance criteria as a National Natural Landmark to represent Pumice Western Juniper (Juniperus occidentalis) in the Columbia Plateau Province

  The National Natural Landmarks (NNL) Program encourages the preservation of exceptional examples of the Nation’s biological and geological features. To qualify for NNL designation, a site must be one of ...

  Citation × Citation Citation Abstract Copy Title: Evaluation of The Island Jefferson County, Oregon for its merit in meeting national significance criteria as a National Natural Landmark to represent Pumice Western Juniper (Juniperus occidentalis) in the Columbia Plateau Province Author: Schuller, Reid, Kagan, James S., Murray, Michael The National Natural Landmarks (NNL) Program encourages the preservation of exceptional examples of the Nation’s biological and geological features. To qualify for NNL designation, a site must be one of the best examples of a geological or biological feature within a biophysiographic province. The Island is an isolated plateau located at the confluence of the Deschutes and Crooked Rivers in Crook County, Oregon. In 1987, it was identified as a potentially outstanding example of western juniper ecosystems as part of the Columbia Plateau biophysiographic province, Ecological Themes evaluation (Kagan et al. 1987a). The Island is an Research Natural Area (RNA), which is jointly owned and managed by the Bureau of Land Management (BLM) and the U.S. Forest Service (USFS). It is our recommendation that The Island PNNL meets the national significance criteria required for the NNL Program. Title: Evaluation of The Island Jefferson County, Oregon for its merit in meeting national significance criteria as a National Natural Landmark to represent Pumice Western Juniper (Juniperus occidentalis) in the Columbia Plateau Province Author: Schuller, Reid, Kagan, James S., Murray, Michael The National Natural Landmarks (NNL) Program encourages the preservation of exceptional examples of the Nation’s biological and geological features. To qualify for NNL designation, a site must be one of the best examples of a geological or biological feature within a biophysiographic province. The Island is an isolated plateau located at the confluence of the Deschutes and Crooked Rivers in Crook County, Oregon. In 1987, it was identified as a potentially outstanding example of western juniper ecosystems as part of the Columbia Plateau biophysiographic province, Ecological Themes evaluation (Kagan et al. 1987a). The Island is an Research Natural Area (RNA), which is jointly owned and managed by the Bureau of Land Management (BLM) and the U.S. Forest Service (USFS). It is our recommendation that The Island PNNL meets the national significance criteria required for the NNL Program. Close

• 5. [Article] Western juniper (Juniperus occidentalis)

  Reprinted June 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...

  Citation × Citation Citation Abstract Copy Title: Western juniper (Juniperus occidentalis) Author: Cornett, Elgin, Oregon State University. Cooperative Extension Service, Oregon State University. Extension Service Reprinted June 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 Title: Western juniper (Juniperus occidentalis) Author: Cornett, Elgin, Oregon State University. Cooperative Extension Service, Oregon State University. Extension Service Reprinted June 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 Close

• 6. [Article] Relationship between allometric variables and biomass in western juniper (Juniperus occidentalis)

  A tenfold expansion of western juniper (Juniperus occidentalis spp. occidentalis) into the sagebrush steppe has led to the degradation of the economic and ecological potential of these landscapes. Land ...

  Citation × Citation Citation Abstract Copy Title: Relationship between allometric variables and biomass in western juniper (Juniperus occidentalis) Author: Sabin, Breanna S. A tenfold expansion of western juniper (Juniperus occidentalis spp. occidentalis) into the sagebrush steppe has led to the degradation of the economic and ecological potential of these landscapes. Land managers have enacted numerous methods to reduce distributions and densities of these trees. Assessment of above ground juniper biomass, expressed overall as well as in each of four fuel - size classes is useful information to land managers for several reasons. These include: enhance smoke management for prescribed burns, appraise feasibility of locating biomass cogeneration power plants, and extrapolating known nutrient and carbon concentrations contained within juniper to the landscape scale. Two sites were selected within Lake County, OR for this research. Allometric measurements including canopy area, canopy volume, age, height, basal diameter were taken from 129 trees and 56 of these were destructively sampled to obtain biomass of each tree; by size classes as well as over all. Regression statistics were utilized to find the correlation between allometric and biomass measurements. Of the allometric variables measured for this research, canopy volume, canopy area, and basal diameter were the strongest predictors of biomass found, with respective R2 values of 0.88, 0.87, 0.81. The proportion of biomass within each of the four size classes was: 34% for size class 1, 15% for size class 2, 23% for size class 3, and 28% for size class 4. Average biomass for these sites was 2,482 kg/ha for the Fort Rock site and 5,410 kg/ha for the Lakeview site. These models can be used to estimate biomass for co-generation plants, estimate nutrient pools and fuel loads, and predict changes in community biomass based on species or growth form groups. Title: Relationship between allometric variables and biomass in western juniper (Juniperus occidentalis) Author: Sabin, Breanna S. A tenfold expansion of western juniper (Juniperus occidentalis spp. occidentalis) into the sagebrush steppe has led to the degradation of the economic and ecological potential of these landscapes. Land managers have enacted numerous methods to reduce distributions and densities of these trees. Assessment of above ground juniper biomass, expressed overall as well as in each of four fuel - size classes is useful information to land managers for several reasons. These include: enhance smoke management for prescribed burns, appraise feasibility of locating biomass cogeneration power plants, and extrapolating known nutrient and carbon concentrations contained within juniper to the landscape scale. Two sites were selected within Lake County, OR for this research. Allometric measurements including canopy area, canopy volume, age, height, basal diameter were taken from 129 trees and 56 of these were destructively sampled to obtain biomass of each tree; by size classes as well as over all. Regression statistics were utilized to find the correlation between allometric and biomass measurements. Of the allometric variables measured for this research, canopy volume, canopy area, and basal diameter were the strongest predictors of biomass found, with respective R2 values of 0.88, 0.87, 0.81. The proportion of biomass within each of the four size classes was: 34% for size class 1, 15% for size class 2, 23% for size class 3, and 28% for size class 4. Average biomass for these sites was 2,482 kg/ha for the Fort Rock site and 5,410 kg/ha for the Lakeview site. These models can be used to estimate biomass for co-generation plants, estimate nutrient pools and fuel loads, and predict changes in community biomass based on species or growth form groups. Close

• 7. [Article] Development and morphology of juvenile western juniper (Juniperus occidentalis Hook.)

  Whole tree excavation of 41 western juniper (Juniperus occidentalis Hook.), ranging in age from 2 to 34 years old, was used to assess the development and structure of root systems, to determine biomass ...

  Citation × Citation Citation Abstract Copy Title: Development and morphology of juvenile western juniper (Juniperus occidentalis Hook.) Author: Kramer, Susanne Whole tree excavation of 41 western juniper (Juniperus occidentalis Hook.), ranging in age from 2 to 34 years old, was used to assess the development and structure of root systems, to determine biomass allocation patterns, and to develop mathematical relationships for estimating biomass and root system dimensions in seedling and young western juniper. Both aboveground and belowground developmental patterns, including structural components and vertical and horizontal root spread, were described relative to plant age. Tree age and height were evaluated as predictors of biomass, root length, and root system dimensions of juvenile western juniper. Seedling root systems consisted of a relatively short tap root and a few weak laterals. With advancing age, root systems expanded in depth and lateral spread. Maximum observed rooting depth and horizontal extension were 1.20 m and 5.70 m, respectively. Root biomass and length allocation shifted from tap to lateral roots with increasing plant age. Lateral root growth dominated in trees older than 10 years. The majority of lateral roots emerged from the tap root between 5 and 20 cm from the soil surface. The relative proportions of accumulated weight in shoot components changed with progressing age. Foliage biomass accounted for the largest fraction of total standing weight throughout the developmental period examined. Adult foliage was first initiated at 17 years of age. Structural tissue increased and dead biomass decreased in relative proportion as the trees grew. Western juniper root/shoot biomass ratios ranged from 0.50 to 1.75 and showed little correlation with age. Fine root/foliage ratios varied between 0.85 and 4.38, and exhibited a significant decline with age. Tree age and height were consistently strong predictors for biomass of root and shoot components, root system length, and extension. Coefficients of determination from regressions on log-log transformed data ranged from 0.70 to 0.92 for tree age and from 0.84 to 0.96 for tree height. Title: Development and morphology of juvenile western juniper (Juniperus occidentalis Hook.) Author: Kramer, Susanne Whole tree excavation of 41 western juniper (Juniperus occidentalis Hook.), ranging in age from 2 to 34 years old, was used to assess the development and structure of root systems, to determine biomass allocation patterns, and to develop mathematical relationships for estimating biomass and root system dimensions in seedling and young western juniper. Both aboveground and belowground developmental patterns, including structural components and vertical and horizontal root spread, were described relative to plant age. Tree age and height were evaluated as predictors of biomass, root length, and root system dimensions of juvenile western juniper. Seedling root systems consisted of a relatively short tap root and a few weak laterals. With advancing age, root systems expanded in depth and lateral spread. Maximum observed rooting depth and horizontal extension were 1.20 m and 5.70 m, respectively. Root biomass and length allocation shifted from tap to lateral roots with increasing plant age. Lateral root growth dominated in trees older than 10 years. The majority of lateral roots emerged from the tap root between 5 and 20 cm from the soil surface. The relative proportions of accumulated weight in shoot components changed with progressing age. Foliage biomass accounted for the largest fraction of total standing weight throughout the developmental period examined. Adult foliage was first initiated at 17 years of age. Structural tissue increased and dead biomass decreased in relative proportion as the trees grew. Western juniper root/shoot biomass ratios ranged from 0.50 to 1.75 and showed little correlation with age. Fine root/foliage ratios varied between 0.85 and 4.38, and exhibited a significant decline with age. Tree age and height were consistently strong predictors for biomass of root and shoot components, root system length, and extension. Coefficients of determination from regressions on log-log transformed data ranged from 0.70 to 0.92 for tree age and from 0.84 to 0.96 for tree height. Close

• 8. [Article] Assessing the Carbon Consequences of Western Juniper (Juniperus occidentalis) Encroachment Across Oregon, USA

  This is the publisher’s final pdf. The published article is copyrighted by Society for Range Management and can be found at: http://www.srmjournals.org/toc/rama/0/0. To the best of our knowledge, one or ...

  Citation × Citation Citation Abstract Copy Title: Assessing the Carbon Consequences of Western Juniper (Juniperus occidentalis) Encroachment Across Oregon, USA Author: Kennedy, Robert E., Campbell, John L., Miller, Richard F., Cohen, Warren B. This is the publisher’s final pdf. The published article is copyrighted by Society for Range Management and can be found at: http://www.srmjournals.org/toc/rama/0/0. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Title: Assessing the Carbon Consequences of Western Juniper (Juniperus occidentalis) Encroachment Across Oregon, USA Author: Kennedy, Robert E., Campbell, John L., Miller, Richard F., Cohen, Warren B. This is the publisher’s final pdf. The published article is copyrighted by Society for Range Management and can be found at: http://www.srmjournals.org/toc/rama/0/0. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Close

• 9. [Article] Resistance of Selected Wood-Based Materials to Fungal and Termite Attack in Non–Soil Contact Exposures

  The resistance of three naturally durable heartwood species and a stranded giant bamboo product to fungal and termite (Coptotermes formosanus) attack was evaluated at a test site located near Hilo, Hawaii. ...

  Citation × Citation Citation Abstract Copy Title: Resistance of Selected Wood-Based Materials to Fungal and Termite Attack in Non–Soil Contact Exposures Author: Morrell, Jeffrey J. The resistance of three naturally durable heartwood species and a stranded giant bamboo product to fungal and termite (Coptotermes formosanus) attack was evaluated at a test site located near Hilo, Hawaii. Merbau (Intsia bijuga or I. palembanica) and ipe (Tabebuia spp.) were both exceptionally resistant to fungal and termite attack, while western juniper (Juniperus occidentalis) heartwood was slightly less resistant to degradation. The presence of heartwood on western juniper samples had no noticeable effect on the performance of adjacent sapwood. The bamboo decking proved to the least durable of the materials and experienced substantial termite and fungal attack over the 32-month test period. Title: Resistance of Selected Wood-Based Materials to Fungal and Termite Attack in Non–Soil Contact Exposures Author: Morrell, Jeffrey J. The resistance of three naturally durable heartwood species and a stranded giant bamboo product to fungal and termite (Coptotermes formosanus) attack was evaluated at a test site located near Hilo, Hawaii. Merbau (Intsia bijuga or I. palembanica) and ipe (Tabebuia spp.) were both exceptionally resistant to fungal and termite attack, while western juniper (Juniperus occidentalis) heartwood was slightly less resistant to degradation. The presence of heartwood on western juniper samples had no noticeable effect on the performance of adjacent sapwood. The bamboo decking proved to the least durable of the materials and experienced substantial termite and fungal attack over the 32-month test period. Close

• 10. [Article] Tree cover mapping for assessing greater sage-grouse habitat in Eastern Oregon

  This project used a predictive model to map canopy cover of vegetation over seven feet in height (“tall woody vegetation”) at 30-meter resolution over nearly 29 million acres within and adjacent to the ...

  Citation × Citation Citation Abstract Copy Title: Tree cover mapping for assessing greater sage-grouse habitat in Eastern Oregon Author: Nielsen, Eric, Noone, Matt This project used a predictive model to map canopy cover of vegetation over seven feet in height (“tall woody vegetation”) at 30-meter resolution over nearly 29 million acres within and adjacent to the range of the greater sage-grouse in Oregon. Although the specific target of the mapping was western juniper (Juniperus occidentalis), reference data did not permit separating juniper from other tall woody vegetation during the predictive modeling process. The majority of the tall woody vegetation within the project area is western juniper. However, in high elevation regions, riparian, wetland, and residential areas, other vegetation is occasionally represented. The methodology discussed here produces raw modeled data. Title: Tree cover mapping for assessing greater sage-grouse habitat in Eastern Oregon Author: Nielsen, Eric, Noone, Matt This project used a predictive model to map canopy cover of vegetation over seven feet in height (“tall woody vegetation”) at 30-meter resolution over nearly 29 million acres within and adjacent to the range of the greater sage-grouse in Oregon. Although the specific target of the mapping was western juniper (Juniperus occidentalis), reference data did not permit separating juniper from other tall woody vegetation during the predictive modeling process. The majority of the tall woody vegetation within the project area is western juniper. However, in high elevation regions, riparian, wetland, and residential areas, other vegetation is occasionally represented. The methodology discussed here produces raw modeled data. Close