Index Catalog // ScholarsArchive@OSU

A multi-trophic level examination of recreational impacts on a national wild and scenic river

Creator:: Wright, Kristopher Keith
Abstract:: Initially, components of an aquatic food web were examined to study impacts of recreational use on the aquatic ecology of Quartzville Creek, Oregon in 1995 and 1996. Measurements of the food web components consisted of observations of harlequin ducks (Histrionicus histrionicus), visual counts of the larval caddisfly Dicosmoecus gilvipes, benthic...
Resource Type:: Masters Thesis
Full Text:: A multi-trophic level examination of recreational impacts on a

An investigation of the distribution of Nephtys caecoides in Yaquina Bay

Creator:: Morrison, George Edwin
Abstract:: A study was undertaken in Yaquina Bay, Oregon during the summer of 1964 to determine the distribution and the factors affecting the distribution of the polychaete worm, Nephtys caecoides, Hartman, 1938, in the estuary. This organism has a continuous distribution from offshore to a point approximately eight kilometers into the...
Resource Type:: Masters Thesis
Full Text:: Department of Oceanography De Date thesis is presented %'7 /', /V Typed by Eula Weathers Redacted for

Aquatic Plant Community Changes in Freshwater Ponds Recently Invaded by Elodea canadensis on the Western Copper River Delta, Alaska

Creator:: Elizabeth, Camarata A.
Abstract:: Establishment of a non-native plant species in new habitats beyond their native range is associated with inherent changes in ecosystem properties. These changes may be dramatic or subdued, and consequences may be positive or negative depending on characteristics and response of the resident ecosystem. Non-native aquatic plant species in the...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Elizabeth Camarata for

Detection, classification and ecology of acoustic scattering layers

Creator:: Cade, David Edmund
Abstract:: Acoustic scattering layers of biological origin have been observed for nearly 70 years across the world’s oceans. The organisms that comprise these layers are known to be important features in most oceanic ecosystems, providing a vital trophic link between small phytoplankton grazers and larger species. There are many aspects of...
Resource Type:: Masters Thesis
Full Text:: signal-to-noise ratio of 10 dB following the method described by De Robertis and Higginbottom (2007

Exploration of Simultaneous Anammox and Denitrification (SAD) Biofilm Processes for Nitrogen Removal

Creator:: Hilliard, Richard F.
Abstract:: Anammox (anaerobic ammonium oxidation) bacteria are capable of providing low-cost nitrogen removal for numerous types of wastewaters. However, low growth rates cause long startup-times and inhibition by oxygen and metabolic substrates necessitate close process control to maintain performance. Incorporation of Simultaneous Anammox and Denitrification (SAD) into constructed wetlands could provide...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF

Forests to floodplain meadows : detrital dynamics in two headwater streams

Creator:: Brookshire, E. N. Jack
Resource Type:: Masters Thesis
Full Text:: Headwater Streams AN ABSTRACT OF THE THESIS OF E.N. Jack Brookshire for the degree of Master of Science

Overcoming the Hypolimnion: Stakeholder Influence in Transboundary Water Quality Governance

Creator:: Offutt, Alyssa J.
Abstract:: Global surface water quality has been degrading with predictions of negative trends in meeting the Sustainable Development Goal ambient water quality targets (Mead, 2019; WWAP & UN Water, 2019). These water quality impacts can cross borders and impact populations in world’s 204 transboundary lake and reservoir basins (ILEC & UNEP,...
Resource Type:: Masters Thesis
Full Text:: employed (De Stefano, Petersen-Perlman, Sproles, Eynard, & Wolf, 2017). Through knowledge of

Response of the cyanobacterium Aphanizomenon flos-aquae to vascular plant decomposition products

Creator:: Haggard, Kale G.
Abstract:: Upper Klamath Lake in south central Oregon annually experiences intense blooms of cyanobacteria, primarily Aphanizomenon flos-aquae. Domination of the lake phytoplankton community by this single species regularly results in drastic changes to water quality. Photosynthetic activity of such extensive populations can result in pH over 10. Blooms typically expire in...
Resource Type:: Masters Thesis
Full Text:: straw in 25 L de-chlorinated tap water. The barley straw was a composite of breeding lines grown at

Riparian litter inputs to streams in the central Oregon Coast Range

Creator:: Hart, Stephanie K.
Abstract:: Riparian zone vegetation can influence terrestrial and aquatic food webs through variations in the amounts, timing, and nutritional content of leaf and other litter inputs. Differences in vegetation composition and density, as well as riparian topography, may modulate the strength and quality of these inputs. Changes in inputs to small...
Resource Type:: Masters Thesis
Full Text:: Master document AN ABSTRACT OF THE THESIS OF

Sediment characteristics and the trophic status of four Oregon lakes

Creator:: Meyerhoff, Roger Dean
Abstract:: There is evidence that recent ecological changes in lakes and their watersheds can be detected from analysis of lake sediments. This study was initiated to correlate changes in some sediment characteristics of four Oregon lakes with past cultural developments of the lakes and their watersheds. The lakes chosen for this...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF ROGER DEAN YERHOFF for the degree

ScholarsArchive@OSU

A multi-trophic level examination of recreational impacts on a national wild and scenic river

An investigation of the distribution of Nephtys caecoides in Yaquina Bay

Aquatic Plant Community Changes in Freshwater Ponds Recently Invaded by Elodea canadensis on the Western Copper River Delta, Alaska

Detection, classification and ecology of acoustic scattering layers

Exploration of Simultaneous Anammox and Denitrification (SAD) Biofilm Processes for Nitrogen Removal

Forests to floodplain meadows : detrital dynamics in two headwater streams

Overcoming the Hypolimnion: Stakeholder Influence in Transboundary Water Quality Governance

Response of the cyanobacterium Aphanizomenon flos-aquae to vascular plant decomposition products

Riparian litter inputs to streams in the central Oregon Coast Range

Sediment characteristics and the trophic status of four Oregon lakes

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