Index Catalog // ScholarsArchive@OSU

Life-history and physiological trade-offs to reproduction of invasive and noninvasive Rubus

Creator:: McDowell, Susan C.
Abstract:: The goal of this dissertation was to improve our understanding of the physiology and life-history of invasive plants and of the mechanisms underlying life-history trade-offs. I compared invasive and noninvasive species of Rubus (blackberry) that grow together in the Pacific Northwest. Three hypotheses were investigated: (1) Invasive Rubus have higher...
Resource Type:: Dissertation

Early-successional vegetation dynamics and microsite preferences following post-fire forest restoration in southwestern Oregon

Creator:: Kayes, Lori J.
Abstract:: Reforestation-based restoration of severely burnt plantations is one of the primary management activities following wildfire on U.S. federal lands. Restoration effects on early-seral plant and cryptogam communities have not been documented. The objectives of this study were, in severely burnt plantations two to four years post-fire, to examine the: (1)...
Resource Type:: Dissertation
Full Text:: by the Oregon BLM State Office, Medford District BLM and USDA Forest Service, PNW Research Station

Riparian and adjacent upslope beetle communities along a third order stream in the western Cascade Mountain Range, Oregon

Creator:: Brenner, Gregory John
Abstract:: Monitoring wildlife habitats has become important to forest ecosystem management because it provides valuable information about the response of forests and their species to harvest practices, impacts from recreational use, conservation efforts, and natural and human-caused disturbances. Monitoring is a complex task that requires a variety of abiotic and biotic...
Resource Type:: Dissertation

Aquatic insect adaptations to different flow regimes

Creator:: Yamamuro, Asako Melody
Abstract:: My thesis explored the effects of environmental variability on population dynamics and community composition of aquatic insects. Environmental variability in the form of flow regime in streams can limit the distribution and life-history traits of aquatic insects. I used tributaries to the McKenzie River in Oregon with dramatically different flow...
Resource Type:: Dissertation
Full Text:: , Forest Service General Technical Report PNW. Parsons, D. J., and T. J. Stohlgren. 1989. Effects of

Molecular characterization of criniviruses and ilarviruses infecting strawberry

Creator:: Tzanetakis, Ioannis E.
Abstract:: Pallidosis is a disease of strawberry identified in 1957 with an unknown etiology. Two previously uncharacterized viruses in strawberry, Strawberry pallidosis associated virus (SPaV) and Beet pseudo-yellows virus (BPYV), have been found associated with disease symptoms. The complete nucleotide sequence of both viruses was determined and molecular detection protocols developed....
Resource Type:: Dissertation

Economic analysis of restoration practices to improve water quality and fish habitat of a large river floodplain : a case study of the Willamette River, Oregon

Creator:: Seedang, Saichon
Abstract:: In- stream water temperature is one of the most important environmental factors associated with the decline in salmonid populations and their habitats in the Pacific Northwest. Most ecological restoration practices that attempt to reduce instream temperatures center on replanting or reestablishing riparian vegetation and increasing flows. However, in a large...
Resource Type:: Dissertation
Full Text:: Northwest Ecosystem Research Consortium (PNW-ERC), Oregon Biodiversity Partnership, Forest Legacy Program

Past climate variability in southwestern Oregon and relationships with regional and hemispheric climate

Creator:: Ersek, Vasile
Abstract:: This dissertation presents the results of three studies that assessed climate variability on short and long timescales in western United States. The growth of carbonate formations in caves (speleothems) is used to infer the timing and amplitude of past climate variability. We first assess the controls on speleothem growth for...
Resource Type:: Dissertation
Full Text:: ). The seasonal and annual climate of the Pacific Northwest (PNW) is strongly influenced by atmosphere

A microscopic and phenological study of pollen development and bloom in selected cultivars of hazelnut (Corylus avellana)

Creator:: Tiyayon, Chantalak
Abstract:: Pollen development is an important process in male flower development, the timing of which may be correlated with time of pollen shed in hazelnut (Corylus avellana L.). Early to very late blooming cultivars were identified and the relationship of microsporogenesis and microgametogenesis, and time of pollen shed were studied in...
Resource Type:: Dissertation
Full Text:: negation in peach buds by high temperatures in a daily cycle. J. Amer. Soc. Hort. Sci. 104: 536-540

Phenotypic response and quantitative trait loci for resistance to Cephalosporium gramineum in winter wheat

Creator:: Quincke, Martin C.
Abstract:: Cephalosporium stripe (Cephalosporium gramineum) is an important disease limiting adoption of conservation tillage practices in the Pacific Northwest. The disease can cause severe loss of grain yield and quality in winter wheat (Triticum aestivum L.). Modified cultural practices can reduce disease incidence, but are not always dependable because of variation...
Resource Type:: Dissertation

Development of predictive mapping techniques for soil survey and salinity mapping

Creator:: Elnaggar, Abdelhamid A.
Abstract:: Conventional soil maps represent a valuable source of information about soil characteristics, however they are subjective, very expensive, and time-consuming to prepare. Also, they do not include explicit information about the conceptual mental model used in developing them nor information about their accuracy, in addition to the error associated with...
Resource Type:: Dissertation

ScholarsArchive@OSU

Life-history and physiological trade-offs to reproduction of invasive and noninvasive Rubus

Early-successional vegetation dynamics and microsite preferences following post-fire forest restoration in southwestern Oregon

Riparian and adjacent upslope beetle communities along a third order stream in the western Cascade Mountain Range, Oregon

Aquatic insect adaptations to different flow regimes

Molecular characterization of criniviruses and ilarviruses infecting strawberry

Economic analysis of restoration practices to improve water quality and fish habitat of a large river floodplain : a case study of the Willamette River, Oregon

Past climate variability in southwestern Oregon and relationships with regional and hemispheric climate

A microscopic and phenological study of pollen development and bloom in selected cultivars of hazelnut (Corylus avellana)

Phenotypic response and quantitative trait loci for resistance to Cephalosporium gramineum in winter wheat

Development of predictive mapping techniques for soil survey and salinity mapping

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