Index Catalog // ScholarsArchive@OSU

Ecological Effects of Reservoir Water Level Management and Implications for Juvenile Chinook Salmon

Creator:: Murphy, Christina A.
Abstract:: Large dams and their respective reservoirs can provide renewable energy and water security, but also profoundly alter riverine ecosystems. In the Pacific Northwest, dams and reservoirs cause discontinuities in river networks that have been particularly problematic for anadromous fishes. As barriers to the upstream and downstream migration of anadromous fishes,...
Resource Type:: Dissertation
Full Text:: Salmon Abstract approved: _____________________________________ Sherri L

Headwater stream macroinvertebrates of the H.J. Andrews Experimental Forest, Oregon

Creator:: Frady, Charles H.
Abstract:: Recent studies of headwater streams have demonstrated their importance to overall watershed biodiversity, nutrient cycling, and energy flux. However, little attention has been paid to long-term effects of forest harvest on macroinvertebrate communities in headwater streams. This study investigated headwater stream macroinvertebrate communities in the H.J. Andrews Experimental Forest, Oregon,...
Resource Type:: Masters Thesis
Full Text:: Sherri L. Johnson Judith L. Li Recent studies of headwater streams have

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:: Sherri Johnson Small low-head diversion dams are capable of removing much of the flow of a river

Persistence of spatial distribution patterns of coastal cutthroat trout in a Cascade mountain stream

Creator:: Novick, Marc S.
Abstract:: Previous research in South Fork Hinkle Creek suggested that coastal cutthroat trout exhibit an aggregated spatial pattern across multiple spatial scales. To evaluate the persistence of the observed abundance patterns and identify factors that affect those patterns, half-duplex passive integrated transponders (PIT-tags) were implanted in 320 coastal cutthroat trout (>...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: Robert E. Gresswell Sherri L. Johnson Previous research in South Fork

Fall directions and breakage of riparian trees along streams in the Pacific Northwest

Creator:: Sobota, Daniel J.
Abstract:: In the Pacific Northwest, regulatory agencies have recently implemented management strategies for restoration and maintenance of wood recruitment to streams over time. This allochthonous organic material is a critical component in the geomorphic and biological structure of forested streams. Mathematical models are commonly used to evaluate long-term wood dynamics in...
Resource Type:: Masters Thesis
Full Text:: the USDA Forest Service. I thank my committee members Drs. Stan Gregory, Sherri Johnson, and John

Willamette Reservoir Food Web Data

Creator:: Murphy, Christina A., Romer, Jeremy D., Stertz, Kevin, Arismendi, Ivan, Emig, Ryan, Monzyk, Fred, and Johnson, Sherri
Abstract:: Isotope and stomach content data from piscivorous reservoir fishes collected from Hills Creek (isotopes; 43°40′16″N 122°25′33″W) and Lookout Point (isotopes and stomach contents; 43°53′48″N 122°43′34″W) reservoirs located on the Middle Fork Willamette River, Oregon. Additional details can be found in the related publication. Isotope sampling was conducted under OSU Institutional...
Resource Type:: Dataset

Experimental analysis of intra- and interspecific competitive interactions between cutthroat trout and sculpins in small streams

Creator:: Ramirez, Ben S.
Abstract:: In the Pacific Northwest ecoregion of North America, sculpins represent a major constituent of freshwater assemblages in coastal rivers. Based on their prevalence and abundance, sculpins are likely important ecologically, yet little is known of their interactions with co-occurring species, such as widely studied salmon and trout (salmonines). In this...
Resource Type:: Masters Thesis
Full Text:: Sherri Johnson and George Weaver for helping me with the study design, and offering guidance and

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:: , Sherri L. Johnson, Stan V. Gregory, and Linda R. Ashkenas

Bottom-up Drivers of Primary Producers and Predator Populations in Oregon Streams

Creator:: Kaylor, Matthew J.
Abstract:: Humans have drastically altered the physical habitat and food web structure of stream ecosystems. Two major impacts humans have had on Pacific Northwest streams are modification of streamside forests (as a result of agriculture, land development, and timber harvest), and declines in the return of wild anadromous salmon to headwater...
Resource Type:: Dissertation
Full Text:: my career. I would like to sincerely thank my committee members; Ivan Arismendi, Sherri Johnson

New insights on an old topic : understanding the effects of forest harvest on trout in the context of climate

Creator:: Penaluna, Brooke E.
Abstract:: Studies of the effects of forest harvest on streams and fish have a long history in the Pacific Northwest. Results of this work have prompted development of new forest harvest practices that are more protective of these resources, but the effectiveness of these new practices has not been fully evaluated....
Resource Type:: Dissertation
Full Text:: like a fish and write like I think. My committee members Drs. Sherri Johnson, Steve Railsback, Lisa

ScholarsArchive@OSU

Ecological Effects of Reservoir Water Level Management and Implications for Juvenile Chinook Salmon

Headwater stream macroinvertebrates of the H.J. Andrews Experimental Forest, Oregon

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

Persistence of spatial distribution patterns of coastal cutthroat trout in a Cascade mountain stream

Fall directions and breakage of riparian trees along streams in the Pacific Northwest

Willamette Reservoir Food Web Data

Experimental analysis of intra- and interspecific competitive interactions between cutthroat trout and sculpins in small streams

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

Bottom-up Drivers of Primary Producers and Predator Populations in Oregon Streams

New insights on an old topic : understanding the effects of forest harvest on trout in the context of climate

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