Index Catalog // ScholarsArchive@OSU

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

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

Spatial Patterns of Soil Moisture and the Relative Importance of Atmospheric Water Demand Versus Soil Moisture Availability in Limiting Late-summer Growth of Douglas-fir Under a Changing Climate

Creator:: Jarecke, Karla M.
Abstract:: The rapid pace of climate change is increasing tree mortality and highlighting the need to improve the mechanistic understanding of plant function under increased water stress. However, the processes that control soil moisture availability in steep mountainous terrain are poorly understood, as are the relative effects of atmospheric and soil...
Resource Type:: Dissertation
Full Text:: committee members, Rick Meinzer, Lisa Ganio, Chris Still, and Jeff Hatten. Their support and

Modelling Early-Seral Vegetation Dynamics Using Climate and Soil Moisture

Creator:: Guevara, Claudio A.
Abstract:: Forest plantations in the Pacific Northwest are highly productive and have been intensively managed to maximize tree growth with practices such as Forest Vegetation Management (FVM). Different FVM regimes have been shown to enhance forest establishment by reducing the competition between the planted seedlings and early-seral vegetation. To better understand...
Resource Type:: Masters Thesis
Full Text:: would also like to thank my committee members, Drs. Chris Still, John Bailey, and Laurence Schimleck

Assessing the Potential for Solar-Induced Chlorophyll Fluorescence to Inform Evapotranspiration Partitioning

Creator:: Richardson, Will P.
Abstract:: Transpiration (T), or the evaporation of water through plant stomata, plays a critical role in climate and biophysical processes at the earth’s surface. While T makes up a majority of the terrestrial evapotranspiration (ET) flux on a global scale, the partitioning of ET is variable and remains elusive. Because photosynthetic...
Resource Type:: Masters Thesis
Full Text:: . Additionally, I’m thankful to my committee members, Chris Still and David Noone, for providing advice and

Fire Refugia Function and Composition in Dry Mixed-Conifer Forests of Oregon’s Blue Mountains

Creator:: Downing, William M.
Abstract:: Contemporary fire effects are raising concerns about the resistance and resilience of dry mixed-conifer forests to large wildfires. Fire refugia – unburned or low-severity patches within fire perimeters – are understudied components of post-fire mosaics that may be key drivers of forest recovery following high-severity fire. Little is known about...
Resource Type:: Masters Thesis
Full Text:: data collection, analyses, and interpretation. My committee members, Tom Spies, Chris Still, and

Satellite Monitoring of Earth’s Surface Temperature : Effects of Land Cover, Disturbance, and a Changing Climate

Creator:: Mildrexler, David J.
Abstract:: The Earth’s surface is experiencing unprecedented change. Humanity’s growing population, expanding land-use footprint, and increasing global emissions of atmospheric greenhouse gases affect a vast number of species on Earth and the functioning of virtually all ecosystems. Given the vital interactions and feedbacks between the Earth’s land surface and climate, measurements...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF David J. Mildrexler for the degree of Doctor of Philosophy in

Physiological Responses of Loblolly Pine and Douglas-fir Seedlings from Various Provenances to Timing and Frequency of Drought Stress

Creator:: Mosel, Jamie E.
Abstract:: Drought is expected to increase in many parts of the world and has been shown to affect tree physiology and growth, with seedlings being particularly vulnerable. Seedling drought responses are often species dependent, and even within species different populations may demonstrate a spectrum of responses to drought, from susceptibility to...
Resource Type:: Masters Thesis
Full Text:: . Barbara Lachenbruch, Frederick C. Meinzer, Christopher Still, and David Woodruff provided guidance on

Advancing the Understanding and Representation of Ecohydrological Processes using Tracer-enabled Modeling Approaches

Creator:: Finkenbiner, Catherine E.
Abstract:: Climate change impacts everyone’s food and water security. Increasing global temperatures accelerate the hydrologic cycle and consequently impact the water resources for billions of people worldwide. Countless models have been developed to represent various components of the hydrologic cycle at various spatial and temporal scales. These are often validated against...
Resource Type:: Dissertation
Full Text:: committee members: Dr. J. Renée Brooks, Dr. Christopher Still, Dr. David Noone, and Dr. Tyler Radniecki

Approaches for Characterizing Plant Physiological Responses to Environmental Stress

Creator:: Marias, Danielle E.
Abstract:: It is uncertain how predicted changes in climate will impact vegetation responses and plant species’ distributions because the physiological mechanisms underlying thresholds for damage are not well understood, and responses to stress vary by functional type and developmental stage. Thus, it is crucial to investigate physiological responses to heat and...
Resource Type:: Dissertation
Full Text:: design, data analyses, and writing of the manuscript. Christopher Still participated in the

ScholarsArchive@OSU

Toward an Optimal Working Distance for Hyperspectral Imaging of Wood

Soil Moisture Encodes Plant Water Use Strategies

Spatial Patterns of Soil Moisture and the Relative Importance of Atmospheric Water Demand Versus Soil Moisture Availability in Limiting Late-summer Growth of Douglas-fir Under a Changing Climate

Modelling Early-Seral Vegetation Dynamics Using Climate and Soil Moisture

Assessing the Potential for Solar-Induced Chlorophyll Fluorescence to Inform Evapotranspiration Partitioning

Fire Refugia Function and Composition in Dry Mixed-Conifer Forests of Oregon’s Blue Mountains

Satellite Monitoring of Earth’s Surface Temperature : Effects of Land Cover, Disturbance, and a Changing Climate

Physiological Responses of Loblolly Pine and Douglas-fir Seedlings from Various Provenances to Timing and Frequency of Drought Stress

Advancing the Understanding and Representation of Ecohydrological Processes using Tracer-enabled Modeling Approaches

Approaches for Characterizing Plant Physiological Responses to Environmental Stress

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