Index Catalog // ScholarsArchive@OSU

Optimum cattle inventory systems under conditions of certainty and uncertainty--south-eastern Oregon

Creator:: Wheeler, Richard Orin
Abstract:: The economic efficiency related to the use of the range resource is extremely important to an area such as Southeastern Oregon where most of the gross income of the area is obtained from range livestock production; important to the economic progress of the region and to the development of a...
Resource Type:: Dissertation
Full Text:: operator that headquartered outside the county or if a particular operation was a dairy farm, feed-lot

Effects of clearcutting a Douglas-fir stand upon small animal populations in western Oregon

Creator:: Hooven, Edward F. (Edward Frank)
Abstract:: An ecological study of small forest mammals was conducted from 1964 to 1970. The objectives were to obtain chronological information relative to the effects of current logging practices on vegetational succession and small mammal populations. The locale of the study was in the west-central Cascade Mountains of Oregon. The principal...
Resource Type:: Dissertation

The effect of osmotic moisture stress during germination on Douglas-fir (Pseudotsuga menziesii)

Creator:: Stewart, Ronald E
Abstract:: Commercially collected Douglas-fir seed from a moist coastal ecotype (LaPush, Washington) and a dry inland ecotype (Kaibab National Forest, Arizona) were subjected to osmotic stresses ranging from 0 to -8 atmospheres using Carbowax polyethylene glycol 6000 during imbibition and germination. To determine the effect of osmotic stress on the initiation...
Resource Type:: Dissertation

Dynamics of organic matter production and degradation during coastal diatom blooms

Creator:: Wetz, Michael S.
Abstract:: Experiments were designed to answer key questions about diatom-derived organic matter cycling (i.e., production and degradation) in coastal systems. Dissolved organic matter (DOM) production was examined in axenic batch cultures of five diatom species. Dissolved organic carbon (DOC) release rates varied between species, but were significantly higher for all species...
Resource Type:: Dissertation
Full Text:: : ________________________________________________________________________ Patricia A. Wheeler Experiments were designed to answer key questions about

John Archibald Wheeler : a study of mentoring in modern physics

Creator:: Christensen, Terry M.
Abstract:: This dissertation has two objectives. The first objective is to determine where best to situate the study of mentoring (i.e. the 'making of scientists') on the landscape of the history of science and science studies. This task is accomplished by establishing mentoring studies as a link between the robust body...
Resource Type:: Dissertation
Full Text:: feature John Wheeler as either the interviewee or a prominent subject of discussion. The project also

The spectral backscattering properties of marine particles

Creator:: Whitmire, Amanda L.
Abstract:: The inherent and apparent optical properties of different ocean regimes are the basis for all optical remote sensing of the ocean. Ecological information derived from remote sensors therefore relies on having a detailed understanding of how particulate backscattering and absorption contribute to the bulk optical signal. The absorption characteristics of...
Resource Type:: Dissertation
Full Text:: , Emmanuel Boss, W. Scott Pegau, Patricia Wheeler, and my graduate representative Skip Rochefort. My major

Evaluation of various indicator techniques in estimating forage intake and digestibility by range cattle

Creator:: Wheeler, Robert Roderick
Resource Type:: Dissertation
Full Text:: ESTIMATING FORAGE INTAKE AND DIGESTIBILITY BY RANGE CATTLE by ROBERT RODERICK WHEELER A THESIS

Comparative study of the population dynamics, secondary productivity, and reproductive ecology of the euphausiids Euphausia pacifica and Thysanoessa spinifera in the Oregon upwelling region

Creator:: Gutierrez, Jaime Gomez
Abstract:: I compare the seasonal abundance variation, population dynamics, fecundity, egg hatching mechanism and success, and apostome ciliate parasites of the euphausiids Euphausia pac?fica and Thysanoessa spinfera from the Oregon coast, USA. Community structure and nearshore distributions were examined from bi-weekly oceanographic surveys (1970-1972). This region has a strong cross-shelf change...
Resource Type:: Dissertation
Full Text:: , metanauplius or calyptopis 1, rather than as the usual nauplius 1. Sac-spawning species sometimes hatch early

Sea-air CO₂ flux variability on the northeast Pacific continental margin

Creator:: Evans, Wiley
Abstract:: Carbon dioxide (CO₂) fluxes between the ocean and atmosphere on continental margins are difficult to diagnose because these regions experience large variability over spatial and temporal scales spanning meters to basins and hours to years, respectively. In a global sense, continental margins could represent a significant atmospheric CO₂ sink, equivalent...
Resource Type:: Dissertation
Full Text:: complicated if nearshore waters, such as estuaries and salt marshes, are included in global or regional

The bionomics of Medetera aldrichii Wheeler (Diptera: Dolichopodidae) in western Oregon

Creator:: Fitzgerald, T. D. (Terrence D.), 1941-
Abstract:: The bionomics of Medetera aldrichii Wheeler (Diptera: Dolichopodidae), a predator of the Douglas-fir beetle (Dendroctonus pseudotsugae Hopkins (Coleoptera:Scolytidae)), was investigated in western Oregon. The predator pupated in host galleries proximal to bark beetle ventilation holes. The tendency of prepupal larvae to form pupal cells near illuminated areas in a photo-response...
Resource Type:: Dissertation
Full Text:: The bionomics of Medetera aldrichii wheeler (Diptera

ScholarsArchive@OSU

Optimum cattle inventory systems under conditions of certainty and uncertainty--south-eastern Oregon

Effects of clearcutting a Douglas-fir stand upon small animal populations in western Oregon

The effect of osmotic moisture stress during germination on Douglas-fir (Pseudotsuga menziesii)

Dynamics of organic matter production and degradation during coastal diatom blooms

John Archibald Wheeler : a study of mentoring in modern physics

The spectral backscattering properties of marine particles

Evaluation of various indicator techniques in estimating forage intake and digestibility by range cattle

Comparative study of the population dynamics, secondary productivity, and reproductive ecology of the euphausiids Euphausia pacifica and Thysanoessa spinifera in the Oregon upwelling region

Sea-air CO₂ flux variability on the northeast Pacific continental margin

The bionomics of Medetera aldrichii Wheeler (Diptera: Dolichopodidae) in western Oregon

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