Search Constraints

Start Over
Filtering by: Creator Mountain, David Remove constraint Creator: Mountain, David Academic Affiliation Forest Ecosystems and Society Remove constraint Academic Affiliation: Forest Ecosystems and Society

Search Results

  • The Mountain Pine Beetle, Climate Change and Sustainable Forestry in the Northern Rocky Mountain

    Creator:
    Gillen, Amanda
    Abstract:
    Mountain pine beetles (MPB) have killed millions of acres of forest throughout the Rocky Mountain ecoregion in the United States and Canada and climate change may be intensifying outbreaks. Climate change can change forest ecosystems and dynamics by increasing drought conditions and intensifying heat waves. Due to changing climate conditions,...
    Resource Type:
    Capstone Project
    Full Text:
    The Mountain Pine Beetle, Climate Change and Sustainable Forestry in the Northern Rocky Mountains

  • Effects of spatial scale and heterogeneity on avian occupancy dynamics and population trends in forested mountain landscapes

    Creator:
    Frey, Sarah J. K.
    Abstract:
    Population trends and patterns in species distributions are the major currencies used to examine responses by biodiversity to changing environments. Effective conservation recommendations require that models of both distribution dynamics and population trends accurately reflect reality. However, identification of the appropriate temporal and spatial scales of animal response, and then...
    Resource Type:
    Dissertation
    Full Text:
    Forested Mountain Landscapes Abstract approved: Matthew G. Betts Population trends and

  • Spruce-Fir Moss Spider (Microhexura Montivaga) Monitoring Plan

    Creator:
    Sacco, Christopher
    Abstract:
    On June 20, 2019, the U.S. Fish and Wildlife Service (USFWS) announced it would conduct a 5-year status review of the Spruce-Fir Moss Spider as part of the process mandated by the Endangered Species Act. Although the Spruce-Fir Moss Spider has been listed as endangered since 1994, minimal research has...
    Resource Type:
    Capstone Project
    Full Text:
    - and 5-days surveying sites at each of the 6 mountain ranges where the 74 sites are located. Mountain

  • Disturbance and dynamics of riparian forests in southwestern Oregon

    Creator:
    Messier, Michael S.
    Abstract:
    Fire exclusion has been associated with structural and compositional changes in many upland forests of the western United States, but little is known about the impacts on riparian forests, portions of the landscape protected for habitat and water quality. For this study, I characterized the historic disturbance and tree recruitment...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: _________________________________ David E. Hibbs Fire exclusion has been associated

  • Mixed-conifer forests of central Oregon : structure, composition, history of establishment, and growth

    Creator:
    Merschel, Andrew G.
    Abstract:
    The structure and composition of mixed-conifer forest (MCF) in central Oregon has been altered by fire exclusion and logging. The resulting increased density, spatial contagion, and loss of fire resistant trees decrease the resiliency of this ecosystem to fire, drought, and insects. The historical and current composition and structure of...
    Resource Type:
    Masters Thesis
    Full Text:
    ponderosa pine (Pinus ponderosa) woodlands and relatively wet grand fir (Abies grandis) and mountain

  • Drivers and Impacts of a Recent Annual Grass Invasion: Ventenata dubia and Fire in the Inland Northwest

    Creator:
    Tortorelli, Claire M.
    Abstract:
    Biological invasions threaten native biodiversity, alter ecosystem function, and are a major cause of economic losses across the planet. The most impactful invaders alter disturbance regimes and initiate state shifts to outside the historical range of variability of the ecosystem. Concern for ecological and economic losses has prompted a rapid...
    Resource Type:
    Dissertation
    Full Text:
    and lab assistants. A huge thanks to Jill Welborn, Jim David, and Upekala Wijayratne for sharing

  • Competition release and climate change effects on a moisture-demanding tree species in a dry system

    Creator:
    Seager, S. Trent
    Abstract:
    Climate change and the increase in meteorological drought have generated global concern over the persistence of ecosystems already in decline from decreased moisture. Evidence suggests dryland ecosystems have been more impacted by drought because of their tightly coupled growth-water relationships and high sensitivity to environmental shift. Removal of competing vegetation...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ David E. Hibbs Climate change and the increase in meteorological drought have generated

  • Tree Vigor Response and Competitive Zone Density in Mature Ponderosa Pine

    Creator:
    Shaw, Randi C.
    Abstract:
    This study explored the relationship of mature ponderosa pine (Pinus ponderosa Dougl. ex Laws) tree vigor and competitive zone density following thinning and fuel reduction treatments. Competitive zone density (CZD) was defined as the total tree basal area (m²/ha) surrounding a given ponderosa pine tree within a 10m fixed radius...
    Resource Type:
    Masters Thesis
    Full Text:
    . Anderson David C. Shaw This study explored the relationship of mature ponderosa pine (Pinus

  • Forest Successional and Disturbance Dynamics in the Southern Blue Mountains of Eastern Oregon

    Creator:
    Johnston, James D.
    Abstract:
    The application of modern land management practices beginning at the turn of the 20th century is widely believed to have dramatically transformed forest landscapes of the inland Pacific Northwest. Restoring historical conditions to make forests resilient to future climate and disturbance regimes is a major goal of federal forest managers....
    Resource Type:
    Dissertation
    Full Text:
    reviews. Mike Vernon, Virginia Bailey, and David Gardelius provided laboratory assistance

  • Spatial and ecological analysis of red fir decline in California using FIA data

    Creator:
    Mortenson, Leif A.
    Abstract:
    Red fir (Abies magnifica) is a high elevation conifer generally growing between an altitude of 1,400 and 2,700 meters. In California, red fir grows in the Sierra Nevada, the Klamath Mountains, the eastern edges of the northern Californian Coast Ranges, and in the southern Cascades. Red fir commonly grows in...
    Resource Type:
    Masters Thesis
    Full Text:
    FIA Data Abstract approved: David C. Shaw Red fir (Abies magnifica) is a high elevation