Index Catalog // ScholarsArchive@OSU

The effects of water withdrawals on the emergence timing, adult body mass, and total emerging biomass of aquatic insects from two northeast Oregon rivers

Creator:: Brown, Phil D.
Abstract:: Small low-head diversion dams are capable of removing much of the flow of a river, often resulting in increased water temperatures and habitat loss. Warmer temperatures have been shown to accelerate aquatic invertebrate growth and development, and discharge reductions can reduce instream habitat, suggesting that water withdrawals may alter both...
Resource Type:: Masters Thesis
Full Text:: profound effect on the life histories of aquatic invertebrates. Temperature plays a direct role in the

The response of nitrifying bacteria to treatments of N-Serve and Roundup in continuous-flow soil columns

Creator:: Rhodes, Albert N.
Abstract:: This study examined the effects of Roundup [N-(phosphonomethyl) glycine] and N-Serve [2-chloro-6- (trichloromethyl) pyridine] on nitrifying organisms in static batch, perfusion soil columns, and a new continuous-flow soil column system. The continuous-flow method is new to nitrification studies and was shown to produce greater nitrifier activity than either static batch...
Resource Type:: Masters Thesis
Full Text:: Prosser (1987), on the other 10 hand, examined the effect of surface specificity and attachment on

Consequences of coumaphos and Varroa destructor on drone honey bee sperm quantity

Creator:: Delaney, Deborah Anne
Abstract:: The number of drones and genetic diversity among drones are essential components to a well mated queen. Varroa destructor preferentially parasitizes drone brood, and is thought to be responsible for the loss of feral populations that once provided additional drones for honey bee mating areas. It is necessary to use...
Resource Type:: Masters Thesis
Full Text:: subtle effects of compounds that are directly introduced into the hive. The effect of coumaphos on

Response of trout, sculpins, and salamanders to experimental manipulation of large wood in Cascade Mountain streams

Creator:: Burgess, Jack A.
Abstract:: Response of aquatic vertebrates to increased pool habitat complexity due to abundance of large wood was evaluated experimentally in three streams in the Cascade Mountains of Oregon. No difference in aquatic vertebrate density was detected among treatments, though there was a trend of increasing aquatic vertebrate density with increasing large...
Resource Type:: Masters Thesis

Influences of clearcut logging on macroinvertebrates in perennial and intermittent headwaters of the Central Oregon Coast Range

Creator:: Banks, Janel
Abstract:: This research was designed to broaden the understanding of how timber-harvest affects aquatic macroinvertebrates in perennial and intermittent headwater streams. This study compared emergent and benthic macroinvertebrate assemblages from 20 headwater streams in the central Oregon Coast Range that varied by harvest condition and flow duration. Through comparison of the...
Resource Type:: Masters Thesis
Full Text:: THESIS OF Janel L. Banks for the degree of Master of Science in Fisheries Science presented on

The Impacts of Multiple Stressors on Aquatic Invertebrate Communities in the Umatilla River

Creator:: Clark, Hannah
Abstract:: Rivers impacted by human activities often have multiple stressors present. The effects of multiple stressors on biological communities can often be difficult to predict, due to the potential for complex interactions between stressors and communities. This thesis explores the impacts of two stressors often associated with agricultural land use, increased...
Resource Type:: Masters Thesis
Full Text:: : The Impacts of Multiple Stressors on Aquatic Invertebrate Communities in the Umatilla River

Effects of Pesticide Exposure on Honey Bee Health : Impacts of Pesticide Interactions and Exposure Through Multiple Routes

Creator:: Parreira, Stephanie
Abstract:: Honey bees (Apis mellifera) are responsible for approximately $17 billion in crop production per year in the United States, and are arguably the most important pollinators in the nation. The future of crop pollination and production is threatened by widespread national honey bee colony losses, which have averaged approximately 30%...
Resource Type:: Masters Thesis
Full Text:: Horticulture presented on May 4, 2016. Title: Effects of Pesticide Exposure on Honey Bee Health: Impacts of

Development of an enzyme-linked immunosorbent assay to detect antibodies against Bacillus thuringiensis subspecies israelensis in Mallard ducks (Anas platyrhynchos)

Creator:: Rutherford, Gregory J.
Abstract:: To develop an assay to detect antibodies to Bacillus thuringiensis subsp. israelensis in mallard ducks, a growth curve was first established for the bacterium. The growth curve indicated that the crystal delta endotoxin would be best harvested from the rest of the cell material after 12 hours of growth. The...
Resource Type:: Masters Thesis
Full Text:: expose sites on the protein that would allow the proteases of the insect gut to cleave the protein to an

Ecuadorean soil arthropod distribution in native vegetation, pasture and cropland and a potato field with and without pesticides

Creator:: Núñez Terán, Verónica
Abstract:: In the past 10 years we have witnessed the beginnings of the study of soil ecology as a unified science, and the general realization by soil scientists, farmers, and land managers that many of the most important economic aspects of soil health are controlled by biological factors. This research focuses...
Resource Type:: Masters Thesis
Full Text:: effect of pesticides in potato cultivation was also studied. In the Ecuadorean montane forest, 361

Susceptibility of riparian soil invertebrates to the herbicide triclopyr

Creator:: Moran, Patrick (Patrick William)
Abstract:: Riparian zones of Pacific Northwest forests have high species diversity and abundance and act as an important interface between the aquatic and terrestrial ecosystems. In addition, riparian zones comprise a significant portion of the total buffer zone established during commercial forest production to protect aquatic ecosystems from adjacent management activities....
Resource Type:: Masters Thesis
Full Text:: forested acres of Oregon. Norris et al (1989) reviewed forestry pesticide use nationwide on lands

ScholarsArchive@OSU

The effects of water withdrawals on the emergence timing, adult body mass, and total emerging biomass of aquatic insects from two northeast Oregon rivers

The response of nitrifying bacteria to treatments of N-Serve and Roundup in continuous-flow soil columns

Consequences of coumaphos and Varroa destructor on drone honey bee sperm quantity

Response of trout, sculpins, and salamanders to experimental manipulation of large wood in Cascade Mountain streams

Influences of clearcut logging on macroinvertebrates in perennial and intermittent headwaters of the Central Oregon Coast Range

The Impacts of Multiple Stressors on Aquatic Invertebrate Communities in the Umatilla River

Effects of Pesticide Exposure on Honey Bee Health : Impacts of Pesticide Interactions and Exposure Through Multiple Routes

Development of an enzyme-linked immunosorbent assay to detect antibodies against Bacillus thuringiensis subspecies israelensis in Mallard ducks (Anas platyrhynchos)

Ecuadorean soil arthropod distribution in native vegetation, pasture and cropland and a potato field with and without pesticides

Susceptibility of riparian soil invertebrates to the herbicide triclopyr

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