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  • Foliar respiration in an old-growth coniferous forest

    Creator:
    Cooper, Clifton E.
    Abstract:
    Foliar respiration forms a large component of the carbon balance of any coniferous forest. We examine seasonal, interannual, spatial and interspecific variation of foliar maintenance respiration in a forest in Washington, USA, with measurements made quarterly for >4 years on 400-year old trees of Pseudotsuga menziesii, Tsuga heterophylla and Thuja...
    Resource Type:
    Dissertation
    Full Text:
    Respiration in an Old-Growth Coniferous Forest. Abstract approved: Foliar respiration forms a large

  • Measuring and Modeling the Structure of Coniferous Trees with Point Clouds Data

    Creator:
    Fang, Rong
    Abstract:
    Coniferous trees are a major North American crop that has been intensively managed for its commercial value, while also serving as critical habitat for abundant wildlife and as carbon sinks. Having diverse functions, North American temperate coniferous forests have become a research hotspot for numerous scientific studies aiming to integrate...
    Resource Type:
    Dissertation
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    . Title: Measuring and Modeling the Structure of Coniferous Trees with Point Clouds Data

  • Dry coniferous forests in the Western Oregon Cascades

    Creator:
    Means, Joseph E.
    Abstract:
    Pseudotsuga menziesii dominates the forests of the Pacific Northwest. But though it is dominat, Tsuaa heteroohylla or Abies amabilis is usually climax. Many researchers have studied Pseudotsuga on the widespread mesic sites where it is seral, but few have examined the relatively rare ecosystems in which Pseudotsuga or its associate...
    Resource Type:
    Dissertation
    Full Text:
    variation in plant moisture stress on dry and modal H.J. Andrews reference stands 13 Dry coniferous forest

  • Historical forest succession and disturbance dynamics in Coastal Douglas-fir forests in the southern western Cascades of Oregon

    Creator:
    Merschel, Andrew G.
    Abstract:
    Coastal Douglas-fir (Pseudotsuga menziesii var menziesii) forests are extensive west of the crest of the Cascade Mountains in Oregon and Washington and are renowned for their productivity, biodiversity, and the ecosystem services they provide. Increasing wildfire activity in recent years including the extensive 2020 Labor Day fires, and a warming...
    Resource Type:
    Dissertation
    Full Text:
    . Merschel for the degree of Doctor of Philosophy in Forest Ecosystems and Society presented on September 17

  • Using soil data to enhance modeling of forest responses to climate change

    Creator:
    Peterman, Wendy L.
    Abstract:
    The over-arching theme of this work is that soil data affect the performance and realism of vegetation models with particular focus on their ability to predict or explain disturbances such as fire or disease. We tested the sensitivity of the Excel version of the 3-PG model to soil properties and...
    Resource Type:
    Dissertation
    Full Text:
    : Using Soil Data to Enhance Modeling of Forest Responses to Climate Change. Abstract approved

  • Modeling sage-grouse habitat using a state-and-transition model

    Creator:
    Evers, Louisa
    Abstract:
    Habitat for wildlife species that depend on sagebrush ecosystems is of great management concern. Evaluating how management activities and climate change may affect the abundance of moderate and high-quality habitat necessitates the development of models that examine vegetation dynamics, but modeling tools for rangeland systems are limited. I developed state-and-transition...
    Resource Type:
    Dissertation
    Full Text:
    presented on November 9, 2010. Title: Modeling Sage-Grouse Habitat Using a State-and-Transition Model

  • Development of a hybrid modeling framework for intensively managed Douglas-fir plantations in the Pacific Northwest

    Creator:
    Weiskittel, Aaron R.
    Abstract:
    Forest growth models in the Pacific Northwest are predominantly empirical. Predictions of yield under alternative silvicultural regimes cannot rely completely on field trials; yet empirical growth models are often inadequate for extrapolating untested regimes and genotypes. The limitations of current models include (1) long time-steps (e.g. 5-10 years); (2) insufficient...
    Resource Type:
    Dissertation
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    forest nutrition (Kimmins, 1985). The hybrid modeling approach may be an important advancement in

  • The use of remote sensing for characterizing forests in wildlife habitat modeling

    Creator:
    Vogeler, Jody C.
    Abstract:
    Spatially explicit maps of habitat relationships have proven to be valuable tools for conservation and management applications including evaluating how and which species may be impacted by large scale climate change, ongoing fragmentation of habitat, and local land-use practices. Studies have turned to remote sensing datasets as a way to...
    Resource Type:
    Dissertation
    Full Text:
    FOR CHARACTERIZING FOREST IN WILDLIFE HABITAT MODELING CHAPTER 1: INTRODUCTION Understanding

  • Modeling Forest Response to Changing Climate Conditions in Western North America

    Creator:
    Hawkins, Linnia R.
    Abstract:
    Forests play an integral role in the global carbon cycle, regulating the atmospheric CO₂ concentration by sequestering nearly one third of anthropogenic carbon emissions and storing carbon for centuries. Forest ecosystems are integrated into the culture, ecology, and economy of western North America, supporting wildlife habitat, local economies, recreation, and...
    Resource Type:
    Dissertation
    Full Text:
    , 2019. Title: Modeling Forest Response to Changing Climate Conditions in Western North America

  • The effects of forest fuel reduction on fire severity and long-term carbon storage

    Creator:
    Mitchell, Stephen Richard
    Abstract:
    Two forest management objectives being debated in the context of federally managed landscapes in the US Pacific Northwest involve a perceived trade-off between fire restoration and C sequestration. The former strategy would reduce fuel (and therefore C) that has accumulated through a century of fire suppression and exclusion that has...
    Resource Type:
    Dissertation
    Full Text:
    characteristics are summarized in Table 2.2. Modeling All simulations used version 4.1.2 of the Biome-BGC