Index Catalog // ScholarsArchive@OSU

Improving ecological risk assessment of pesticides for nontarget terrestrial vertebrates

Creator:: Wang, Guiming
Abstract:: The Quotient Method (QM) is used by the United States Environmental Protection Agency (USEPA) in ecological risk assessments of pesticides for nontarget organisms. The QM requires several assumptions regarding exposure and hazards of pesticides to wildlife; several of these assumptions have not been tested. During 1997-99, I conducted three experiments...
Resource Type:: Dissertation
Full Text:: animals were released at the same trap station where they were caught and given I to 2 days to adapt to

Conservation of arthropod natural enemies in broccoli with relay strip-cropping

Creator:: McGrath, Daniel M. (Daniel Morton)
Abstract:: Relay strip-cropping combines two vegetation management tactics, under-sowing and strip-management. In this study conducted from 1994 though 1997, a cover crop seed-mixture containing oats (Avena sativa L. var. "Monida"), common vetch (Vicia sativa L.), red clover (Trifolium pratense L.), annual ryegrass (Lolium multflorum Lam.), and buckwheat (Fagopyrum esculentum Moench) was...
Resource Type:: Dissertation

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
Full Text:: National Forest, and the USDA Forest Service's Pacific Northwest Research Station. Since it was

Reproductive and aggressive behaviors in the giant hairy desert scorpion

Creator:: Tallarovic, Sara K.
Abstract:: The giant hairy desert scorpion, Hadrurus arizonensis, is a long-lived species of North American scorpion that is presented here as an important model for research in mating systems evolution and sexual selection. Many behaviors found in this species were undocumented and are described here for the first time. This thesis...
Resource Type:: Dissertation
Full Text:: State University several weeks after collection. At the field station laboratory animals were kept

From risk to resiliency : academic persistence in Mexican-American high school English as a Second Language students

Creator:: Temes, Carla A.
Abstract:: Five student-researchers and the author engaged in a continually-evolving, student-driven qualitative research study. Despite significant disadvantages, including navigating a. foreign culture without speaking the language, these invulnerable learners succeeded. Ultimately of greatest interest to the six were an analysis of their collective knowledge and experiences, and their individual transformation over...
Resource Type:: Dissertation

Hydric Soils in Eastern Oregon Temporary Pools

Creator:: Clausnitzer, David
Abstract:: Two types of temporary poois, known as playas, occur in semiarid southeast Oregon. Vegetated upland playas are found in the High Lava Plain province; barren alkaline-saline playas are found in the Basin and Range province. Both types become ponded in most years, but they often lack redoximorphic features indicative of...
Resource Type:: Dissertation
Full Text:: Waterways Experiment Station, Vicksburg, MS. Federal Register. 1982. Title 33: Navigation and navigable

Edge effects of clearcut harvesting on ground arthropod species composition and predator community structure in old-growth Douglas-fir forests

Creator:: Work, Timothy Theron
Abstract:: Edge effects resulting from forest fragmentation are likely to alter the distributions and interactions of resident species. I evaluated changes in species composition, species turnover, and relative abundance of ground arthropods across replicated transects extending from regenerating clearcuts into old-growth Douglas-fir forests. Arthropods were collected from 3-August to 14-September in...
Resource Type:: Dissertation

AquaFarm : simulation and decision-support software for aquaculture facility design and management planning

Creator:: Ernst, Douglas H.
Abstract:: A simulation and decision-support software product for aquaculture facility design and management planning is described (AquaFarm, Oregon State University©), including comprehensive documentation and applications to practical problems. AquaFarm provides (1) simulation of physical, chemical, and biological unit processes, (2) simulation of facility and fish culture management, (3) compilation of facility...
Resource Type:: Dissertation

Foodservice systems management competencies of Korean dietitians

Creator:: Yoon, Ji-young
Abstract:: Foodservice systems management (FSM) has had impact on the role of dietitians, not only in the United States (US), but also in Korea. The purpose of the study was: (1) to delineate and identify the acceptable FSM competencies for Korean dietitians (KDs), (2) to identify factors which influenced the Korean...
Resource Type:: Dissertation
Full Text:: of 47 FSM competencies, and (2) Korean dietetic practitioner (n=484, 65% response) and KDE (n=39

From continua to patches : longitudinal patterns in the Middle Fork of the John Day River, Oregon

Creator:: Wright, Kristopher Keith
Abstract:: The Middle Fork John Day River is composed of low gradient, alluvial valley segments separated by constrained, canyon-like reaches, and has a history of multiple land-uses. These factors can alter the physical and biological structure of streams, and disrupt the longitudinal river continuum. I examined habitat, fish, macroinvertebrates, and primary...
Resource Type:: Dissertation

ScholarsArchive@OSU

Improving ecological risk assessment of pesticides for nontarget terrestrial vertebrates

Conservation of arthropod natural enemies in broccoli with relay strip-cropping

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

Reproductive and aggressive behaviors in the giant hairy desert scorpion

From risk to resiliency : academic persistence in Mexican-American high school English as a Second Language students

Hydric Soils in Eastern Oregon Temporary Pools

Edge effects of clearcut harvesting on ground arthropod species composition and predator community structure in old-growth Douglas-fir forests

AquaFarm : simulation and decision-support software for aquaculture facility design and management planning

Foodservice systems management competencies of Korean dietitians

From continua to patches : longitudinal patterns in the Middle Fork of the John Day River, Oregon

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