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An Exploration of the Ecological and Geographical Variability of Rhizopus microsporus Clinical and Environmental Isolates

Creator:: Stairs, Brandon S.
Abstract:: Rhizopus microsporus is a globally ubiquitous opportunistic human and plant pathogen that is known to harbor endosymbiotic bacteria. Differences between populations of clinical and environmental R. microsporus isolates have yet to be assessed on a global scale. Whole-genome sequence data were used to explore fungal biology and to assess potential...
Resource Type:: Masters Thesis
Full Text:: from diverse clinical sources were less available than isolates of diverse environmental origin

Environmental Factors Affecting Phytophthora Root Rot of Rhododendron

Creator:: Mestas, Angie
Abstract:: Phytophthora root rot decreases availability and quality of rhododendrons produced in the USA. Symptoms of Phytophthora root rot include root necrosis, leaf chlorosis, stunting, and permanent wilt. The purpose of this thesis was to better understand the impact of root damage, soil moisture, nitrogen fertilizer application, and pathogen species on...
Resource Type:: Masters Thesis
Full Text:: . Title: Environmental Factors Affecting Phytophthora Root Rot of Rhododendron. Abstract

Non-target Effects of Biological Control: Ecological Risk of Tyria jacobaeae (Lepidoptera: Erebidae) to Senecio triangularis (Asteraceae) in Western Oregon

Creator:: Rodman, Madison G.
Abstract:: Non-target effects are one of the greatest potential risks of weed biological control programs, and understanding non-target effects of biological control at the population level is crucial for predicting when they will occur and altering the perception of biological control as a whole. In this thesis, we assessed the ecological...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Madison G

Harvestable moss : communities, hosts, and accumulation

Creator:: Peck, JeriLynn E.
Abstract:: With the increased recognition of moss as a secondary forest product has come an increased concern for the ecological ramifications of moss harvest. Three issues of primary concern are (1) characterizing the epiphyte communities impacted by harvest, (2) assessing the host preferences of these epiphytes, and (3) describing the availability...
Resource Type:: Masters Thesis

Epiphytic macrolichens in relation to forest management and topography in a western Oregon watershed

Creator:: Berryman, Shanti D.
Abstract:: This dissertation describes patterns in epiphytic macrolichen community composition, diversity, and biomass across various stand types in the Blue River watershed of western Oregon. It first examines the relative importance of ecological factors such as stand age, remnant tree retention, and topography to lichen communities in the landscape. It then...
Resource Type:: Dissertation
Full Text:: ..................................................................144 Appendix B Codes and Descriptions of Environmental and Lichen Community Variables

Ozone flux in Helianthus annuus (L.)

Creator:: Smith, Elaine D.
Abstract:: Sunflower (Helianthus annuus L., cv. NK894) seedlings, grown hydroponically, were exposed to ozone concentrations of 0.0, 0.1, 0.2, and 0.3 ppm at 60% RH, or 0.0 and 0.3 ppm at 30% and 90% RH, for 6 h/d, for four consecutive days, at ages 15 to 18 days from seeding. Plant...
Resource Type:: Masters Thesis
Full Text:: affected by environmental and developmental factors, the concentration of ozone plants are exposed to is

Conservation of Sidalcea nelsoniana through habitat management : effects of burning, mowing, and altered flooding regime on a rare Willamette Valley perennial

Creator:: Bartels, Marilynn R.
Abstract:: Active habitat management plays a key role in the preservation of native ecosystems and rare species, especially in the Willamette Valley of Oregon, where natural succession to woodlands threatens the few wetland prairies remaining after 150 years of agriculture and urbanization. Sidalcea nelsoniana, listed as threatened under the federal Endangered...
Resource Type:: Masters Thesis
Full Text:: of Sidalcea nelsoniana Through Habitat Management: Effects of Burning, Mowing, and Altered Flooding

Organic pesticide modification of the species interactions in an annual plant community

Creator:: Pfleeger, Thomas G.
Resource Type:: Masters Thesis
Full Text:: fluoride (Bunce, 1979). The environmental significance of organics is unknown, but forest decline in

Conservation and Land Management : Seeds of Success, New Mexico

Creator:: Weller, Stacey A.
Abstract:: The Seeds of Success (SOS) is a wildland seed collection program in support of the interagency Native Plant Materials Development Program (NPMP) and in partnership with the global conservation initiative, the Millennium Seed Bank Project of the Royal Botanic Gardens, Kew. SOS collections follow a set protocol with consideration for...
Resource Type:: Capstone Project
Full Text:: Management: Seeds of Success, New Mexico Internship conducted at: USDI Bureau of Land Management

Shrub epiphyte communities in relation to stand management in forests of western Oregon

Creator:: Rosso, Abbey L.
Abstract:: This dissertation describes the epiphyte communities on tall shrubs in forests of western Oregon, with a focus on potential effects of management practices on these communities. Shrubs and other hardwoods have recently gained recognition as hotspots of diversity for epiphytes in young conifer forests of the region. Yet little is...
Resource Type:: Dissertation
Full Text:: Relation to Stand Management in Forests of Western Oregon. Abstra Abstract Approved Patricia S. Muir

ScholarsArchive@OSU

An Exploration of the Ecological and Geographical Variability of Rhizopus microsporus Clinical and Environmental Isolates

Environmental Factors Affecting Phytophthora Root Rot of Rhododendron

Non-target Effects of Biological Control: Ecological Risk of Tyria jacobaeae (Lepidoptera: Erebidae) to Senecio triangularis (Asteraceae) in Western Oregon

Harvestable moss : communities, hosts, and accumulation

Epiphytic macrolichens in relation to forest management and topography in a western Oregon watershed

Ozone flux in Helianthus annuus (L.)

Conservation of Sidalcea nelsoniana through habitat management : effects of burning, mowing, and altered flooding regime on a rare Willamette Valley perennial

Organic pesticide modification of the species interactions in an annual plant community

Conservation and Land Management : Seeds of Success, New Mexico

Shrub epiphyte communities in relation to stand management in forests of western Oregon

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