Index Catalog // ScholarsArchive@OSU

The effects of water velocity, photoperiod and substrate on the survival and growth of sub-yearling Oregon crayfish (Pacifastacus trowbridgii) Stimpson

Creator:: Hutton, Mark Irvin
Abstract:: In an effort to enhance the possibilities of commercially rearing crayfish (Pacifastacus trowbridgii), the subyearling segment of the life cycle was examined to determine practical ways of increasing survival and growth. Four experiments were designed to study the effects of water velocity, photoperiod, substrate and density of stocking on the...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF MARK IRVIN HUTTON (Name of student

Invertebrate composition and distribution in desert springs of Oregon

Creator:: Mauger, Susan
Abstract:: In the summers of 1998 and 1999, aquatic invertebrate and plant communities were sampled from nineteen springs in the Warner Basin of southeastern Oregon. Across the landscape, these springs exhibited a broad range in water temperature (5-24°C), pH, conductivity, elevation, and gradient. Within a particular spring, water temperature and chemistry...
Resource Type:: Masters Thesis
Full Text:: Of Oregon. Abstract approved Judith L. Li In the summers of 1998 and 1999, aquatic invertebrate

Nesting ecology of mallards in the Willamette Valley of Oregon

Creator:: Rickerson, Eric V.
Abstract:: Although widely studied in many portions of North America, little is known about the specific habitat requirements of mallard ducks (Anas platyrhynchos) during the breeding season in western Oregon. I radio-marked 72 female mallards in the Willamette Valley of Oregon in March-April 1995-96 to document wetland habitat selection during pre-nesting...
Resource Type:: Masters Thesis
Full Text:: completion. First, I wish to thank my advisor Dr. Robert L. Jarvis whose guidance and incredible patience

Movement and space use by the green hermit (Phaethornis guy) in a fragmented landscape in Costa Rica

Creator:: Volpe, Noelia L.
Abstract:: Human activities have altered Earth’s ecosystems. Most biomes have experienced a 20-50% conversion to human use. Loss of habitat has obvious effects on the persistence of species. Fragmentation, however, may also negatively affect biodiversity for those species that exhibit behavioral responses to changes in habitat configuration. Such behavioral changes include...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Noelia L. Volpe for the degree of Master of Science in Wildlife

Linkages among land use, riparian zones, and uptake and transformation of nitrate in stream ecosystems

Creator:: Sobota, Daniel J.
Abstract:: Land use alters the physical and biological structure of stream ecosystems and potentially alters their capacity to process nitrogen (N), an essential nutrient that has nearly doubled in abundance on the biosphere during the past century from human activities. In this dissertation, I quantified uptake and transformation of nitrate (NO₃⁻)...
Resource Type:: Dissertation
Full Text:: remaining stream, which had the largest discharge (120 L s-1) in this study, only 8% of the tracer was

A Stable Isotope Tracer Study of the Influences of Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams

Creator:: Sobota, Daniel J., Johnson, Sherri L., Gregory, Stan V., and Ashkenas, Linda R.
Abstract:: The influence of land use on potential fates of nitrate (NO3-) in stream ecosystems, ranging from denitrification to storage in organic matter, has not been documented extensively. Here, we describe the Pacific Northwest component of Lotic Intersite Nitrogen eXperiment, phase II (LINX II) to examine how land-use setting influences fates...
Resource Type:: Article
Full Text:: Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams Daniel J. Sobota,1* Sherri L

Ecology of woody riparian vegetation in tributaries of the Upper Grande Ronde River basin, Oregon

Creator:: Lytjen, Danna J.
Abstract:: Two studies on Catherine Creek and Meadow Creek of the Upper Grande Ronde River basin, quantified several physical and biotic influences on woody riparian community composition and structure. The Catherine Creek study examined the association of woody riparian species with elevational and geomorphic gradients. The Meadow Creek study examined the...
Resource Type:: Masters Thesis

Assessing biological values of Wetland Reserve Program wetlands for wintering waterfowl

Creator:: Evans-Peters, Graham, R.
Abstract:: The Wetland Reserve Program (WRP) is one conservation tool that mitigates national wetland loss and a primary goal for the program includes optimizing wildlife habitat by restoring wetland functions and values. Few studies have evaluated the WRP, which limits our understanding of its impact on wildlife populations. I assessed the...
Resource Type:: Masters Thesis
Full Text:: , Klamath Basin National Wildlife Refuge Complex, Tulelake, California, USA. Fredrickson L. H., and T

Status and habitat use of Columbian white-tailed deer in Douglas County, Oregon

Creator:: Smith, Winston Paul
Abstract:: A study conducted May 1978-December 1980 determined that the present geographic range of Columbian white-tailed deer, Odocoileus virginianus leucurus, (CWTD) in Douglas County, Oregon encompassed 1199km2. The area was predominately a Quercus woodland community, typical of the Interior Valley Zone of western Oregon. The CWTD distribution was not contiguous throughout...
Resource Type:: Dissertation

Population characteristics and habitat utilization of bighorn sheep, Steens Mountain, Oregon

Creator:: Van Dyke, Walter A.
Abstract:: A herd of re-introduced California bighorn sheep (Ovis canadensis californiana) was studied from 15 June 1976 to 31 August 1977. Thirteen major and seven minor habitats were delineated and described. Habitat use by bighorns was observed throughout the study and a habitat preference value (H.P.V.) was calculated based on use...
Resource Type:: Masters Thesis
Full Text:: 81.6 37.9 121.2 5.6 5.2 0.5 0.3 0.2 0.6 All All T a b l e 2 . ( c o n t i n u e d ) C h a r

ScholarsArchive@OSU

The effects of water velocity, photoperiod and substrate on the survival and growth of sub-yearling Oregon crayfish (Pacifastacus trowbridgii) Stimpson

Invertebrate composition and distribution in desert springs of Oregon

Nesting ecology of mallards in the Willamette Valley of Oregon

Movement and space use by the green hermit (Phaethornis guy) in a fragmented landscape in Costa Rica

Linkages among land use, riparian zones, and uptake and transformation of nitrate in stream ecosystems

A Stable Isotope Tracer Study of the Influences of Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams

Ecology of woody riparian vegetation in tributaries of the Upper Grande Ronde River basin, Oregon

Assessing biological values of Wetland Reserve Program wetlands for wintering waterfowl

Status and habitat use of Columbian white-tailed deer in Douglas County, Oregon

Population characteristics and habitat utilization of bighorn sheep, Steens Mountain, Oregon

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search