Search Constraints

Start Over
Filtering by: Creator Still, Christopher Remove constraint Creator: Still, Christopher Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

Search Results

  • Ecosystem Photosynthesis and Forest-Atmosphere Interactions Inferred from Carbonyl Sulfide

    Creator:
    Rastogi, Bharat
    Abstract:
    An increase in anthropogenic activities since the industrial revolution, primarily due to burning of fossil fuels and changes in land cover, has resulted in a steady increase in the global mean atmospheric CO2 concentrations. While there is unequivocal scientific evidence on global warming and its multidimensional impacts on natural and...
    Resource Type:
    Dissertation
    Full Text:
    : _____________________________________________________________________ Christopher J. Still An increase in anthropogenic activities since the industrial

  • Plants and their Environment: Assessing Canopy Microclimate and the Response of Trees to Environmental Stress in a Diversity of Forest Types

    Creator:
    Sibley, Adam M.
    Abstract:
    The topics in this dissertation are centered around the way that trees respond to environmental stress in the climates where they occur. Though forests across the planet are expected to experience change in local climate due to historic and ongoing anthropogenic greenhouse gas emissions, the effects of climate change will...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Frederick C. Meinzer, Christopher J. Still The topics in this

  • Differences in Evolutionary History and Ploidy Type Shape the Interactions of Populus tremuloides Michx. with Climate

    Creator:
    Greer, Burke Thomas
    Abstract:
    Quaking aspen (Populus tremuloides Michx) is a species with high phenotypic plasticity and a broad distribution that, in the last decade, has experienced climate stress-induced mortality called Sudden Aspen Decline (SAD). In order to help mitigate the effects of SAD in the future, we need a better understanding of aspen’s...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Christopher J. Still Quaking aspen (Populus tremuloides Michx) is a species with high

  • The Effect of Canopy Cover and Wildfire Smoke on Near-Surface Temperatures

    Creator:
    Brackett, Amanda
    Abstract:
    Recent shifts from clearcutting to partial retention harvesting on many ownerships and the importance of microclimate dynamics on biotic responses to regional climate highlight the need to understand how microclimate conditions in forest understories differ across gradients of partial overstories. This study compares below-canopy near-surface temperatures at 2cm above ground...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: ___________________________________________________ Klaus J. Puettmann & Christopher J. Still

  • Phenology and Productivity of C₃ and C₄ Grasslands in Hawaii

    Creator:
    Pau, Stephanie and Still, Christopher J.
    Abstract:
    Grasslands account for a large proportion of global terrestrial productivity and play a critical role in carbon and water cycling. Within grasslands, photosynthetic pathway is an important functional trait yielding different rates of productivity along environmental gradients. Recently, C₃-C₄ sorting along spatial environmental gradients has been reassessed by controlling for...
    Resource Type:
    Article
    Full Text:
    Phenology and Productivity of C₃ and C₄ Grasslands in Hawaii Pau, S., Still, C. J. (2014). Phenology and

  • Toward an Optimal Working Distance for Hyperspectral Imaging of Wood

    Creator:
    Jayawickrama, Michelle T.
    Abstract:
    The forest products industry relies on the production of high-quality wood to satisfy consumer requirements. Improving wood quality requires an effective and inexpensive technique for measuring critical properties such as density and microfibril angle. An emerging technology known as near-infrared hyperspectral imaging (NIR HSI) essentially captures surface images of samples...
    Resource Type:
    Honors College Thesis
    Full Text:
    _____________________________________________________________________ Christopher Still, Committee Member, representing Forest Ecosystems & Society

  • Aspen Drought Stress Response, Snow Cover and Soil Moisture Dynamics on an Oregon Bunchgrass Prairie

    Creator:
    Neary, Andrew
    Abstract:
    Quaking aspen, Populus tremuloides, has experienced severe declines in recent years in part due to the effects of changing climate and extreme drought. As the dominant deciduous tree in Western North American forests, aspen plays a critical role in forest biodiversity and ecosystem function. Therefore, the persistence of this species...
    Resource Type:
    Masters Thesis
    Full Text:
    members: Dr. Christopher Still and Dr. Bryan Endress for reviewing manuscripts and helping to focus the

  • Soil Moisture Encodes Plant Water Use Strategies

    Creator:
    Bassiouni, Maoya
    Abstract:
    Resilient water, food, and energy management strategies for an ever-growing population and changing environment depends on our understanding of water and carbon cycles from local to global scales. Fluxes of water and carbon are coupled by photosynthesis and plant transpiration cycles the largest fraction of terrestrial water from the land...
    Resource Type:
    Dissertation
    Full Text:
    toward Major Professors Chad Higgins and Stephen Good; committee members Christopher Still and

  • Science Takes Flight: Detection of Black Leg on Turnip Gray Mold on Hemp

    Creator:
    Bates, Taylor A.
    Abstract:
    Disease detection through traditional techniques such as scouting fields on foot, molecular assays, or morphological identification of plant pathogens is time consuming and costly. Disease diagnosis in the field can be extremely subjective, and largely depends on the experience and knowledge of pathogen identification and disease quantification. This thesis provides...
    Resource Type:
    Masters Thesis
    Full Text:
    , camera, and software. I would like to thank Dr. Christopher Still for being my graduate representative

  • Leveraging multi-sensor time series datasets to map short- and long-term forest disturbances and drivers of change in the Colombian Andes

    Creator:
    Murillo Sandoval, Paulo Jose
    Abstract:
    The spatial distribution of forest disturbance is commonly calculated using a satellite imagery-driven bi- or tri-temporal change analysis. Working in Colombia’s Cordillera de los Picachos National Natural Park – a region of consistent cloud cover and dramatic topographic relief – a change assessment with such infrequent observations cannot capture long-term...
    Resource Type:
    Masters Thesis
    Full Text:
    are still limited (Pasquarella, Holden, Kaufman, & Woodcock, 2016). The cumulative changes in the