Index Catalog // ScholarsArchive@OSU

The Effect of Sill Height on Decay in Air-Seasoning Crossties

Creator:: Rogers, Leon R.
Abstract:: The sustainable use of wood for rail ties requires chemical treatment to increase service life and maintain structural integrity. Treatment can only be applied after lengthy air-seasoning to reduce moisture content in wood, but seasoning leaves ties exposed to attack by decay fungi for up to a year. One factor...
Resource Type:: Masters Thesis

Developing models to predict favorable environments for rice blast

Creator:: Calvero, Silvino B.
Abstract:: Statistical analyses were used to develop predictive models of rice blast and to relate the favorability of environment to disease incidence and severity on different rice cultivars at five sites in Asia. The WINDOW PANE program was used to search for weather factors highly correlated with blast. Stepwise and r-square...
Resource Type:: Masters Thesis
Full Text:: to search for weather factors highly correlated with blast. Stepwise and r-square linear regression

The Role of Intraspecific Functional Trait Variation in the Differential Decline of Meadow Species Following Conifer Encroachment

Creator:: Celis, Jessica
Abstract:: In the Oregon Cascade Range, conifer encroachment has reduced the extent of mountain meadows by as much as 50% since the mid-1940s. Although encroachment results in a general decline of meadow species abundance and diversity, species differ in their sensitivities to encroachment: some show rapid declines whereas others persist in...
Resource Type:: Masters Thesis
Full Text:: sensitivity to encroachment (r = 0.24, p = 0.46). Analyses of the components of SLA revealed a significant

Growth and photosynthesis of plants in response to environmental stress

Creator:: Greitner, Carol S.
Resource Type:: Dissertation
Full Text:: . Fitter, A. H. & Hay, R. K. M. (1987). Environmental Physiology of Plants. Academic Press, San Diego

Distribution, seasonal variation and community structure of the demersal trawl fauna of Ragay Gulf, Philippines

Creator:: Jamir, Tomas Vergel C.
Resource Type:: Dissertation
Full Text:: .................................................................. 31 3. Inverse or R-Type Analysis

The ecological consequences of the reduction of species diversity : experimental approaches

Creator:: Allison, Gary William
Abstract:: The influence of loss of diversity on community dynamics and ecosystem functioning has recently received considerable attention. Although study of biodiversity has a long history within ecology, empirical investigations exploring consequences of loss have been rare. Because many factors confound diversity comparisons, experimental manipulations of diversity offer the most direct...
Resource Type:: Dissertation

The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Creator:: Holub, Scott M.
Abstract:: Forests in the Pacific Northwest receive very little nitrogen through atmospheric deposition and thus studying the nitrogen cycle in this region can provide insights into how the unpolluted nitrogen cycle functions. I examined the fate of organic nitrogen versus inorganic nitrogen and the effect of tamlins on N retention by...
Resource Type:: Dissertation
Full Text:: Botany. 66: 1539-1546. Binkley, D., P. Sollins, R. Bell, D. Sachs, and D. Myrold. 1992. Biogeochemistry

Chaparral history, dynamics, and response to disturbance in southwest Oregon : insights from age structure

Creator:: Duren, Olivia
Abstract:: Fuels management on Bureau of Land Management lands in SW Oregon, USA, is motivated by the needs to reduce fire hazard and restore ecosystems thought to be impacted by fire suppression. Chaparral is one of the most characteristic vegetation communities of SW Oregon's interior valleys, and extensive acreages within this...
Resource Type:: Masters Thesis

Drivers of arbuscular mycorrhizal fungal community composition in roots : hosts, neighbors, and environment

Creator:: Phillips, Wendy S.
Abstract:: The vast majority of terrestrial plant species live in symbiosis with arbuscular mycorrhizal fungi (AMF). AMF and plants live in complex networks, with roots of individual plants hosting multiple AMF, and single AMF colonizing multiple plants concurrently. Through the exchange of resources, the two partners of this symbiosis can have...
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:: Page 2.1. Three-dimensional NMS ordinations of vascular plant (a and c: R 2 =69% for all three

ScholarsArchive@OSU

The Effect of Sill Height on Decay in Air-Seasoning Crossties

Developing models to predict favorable environments for rice blast

The Role of Intraspecific Functional Trait Variation in the Differential Decline of Meadow Species Following Conifer Encroachment

Growth and photosynthesis of plants in response to environmental stress

Distribution, seasonal variation and community structure of the demersal trawl fauna of Ragay Gulf, Philippines

The ecological consequences of the reduction of species diversity : experimental approaches

The fate of organic and inorganic nitrogen inputs in an old-growth forest of the central Oregon Cascade Range

Chaparral history, dynamics, and response to disturbance in southwest Oregon : insights from age structure

Drivers of arbuscular mycorrhizal fungal community composition in roots : hosts, neighbors, and environment

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

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