Index Catalog // ScholarsArchive@OSU

Relationships among in-stream physical habitat, land use, and geology in small coastal streams of northern Oregon

Creator:: Scott, Larissa E.
Abstract:: Salmonid populations in the Pacific Northwest are at historic lows and many populations continue to decline. Previous studies have linked salmonid declines to land use through degradation of in-stream physical habitat, but few of these studies have taken geology into consideration. This study relates habitat parameters known to be important...
Resource Type:: Masters Thesis
Full Text:: Use, and Geology in Small Coastal Streams of Northe Oregon Abstract approved: AN ABSTRACT OF THE

A geographical framework for assessing longitudinal patterns in stream habitat and fish distribution

Creator:: Torgersen, Christian E.
Abstract:: New approaches are needed to quantify and understand spatial patterns of stream fishes and their environment. Concepts in riverine ecology emphasize the importance of thermal zones and gradual longitudinal changes in physical habitat and biota, but little is known about spatial variability within the river continuum. I present a conceptual...
Resource Type:: Dissertation
Full Text:: ecology emphasize the importance of thermal zones and gradual longitudinal changes in physical habitat

Seasonal floodplain wetlands as fish habitat in Oregon and Washington

Creator:: Baker, Cynthia F.
Abstract:: To begin to understand freshwater seasonal floodplain fish communities in the context of human alteration of the physical system, species introductions and wetland restoration efforts, I studied fish assemblages in fifteen seasonal floodplain wetlands within four geographic regions (coastal, upper Columbia River estuary, Puget Sound and eastern Oregon/Washington) in the...
Resource Type:: Dissertation
Full Text:: Science presented on March 17, 2008. Title: Seasonal Floodplain Wetlands as Fish Habitat in Oregon

Population dynamics of coral-reef fishes : spatial variation in emigration, mortality, and predation

Creator:: Overholtzer-McLeod, Karen L.
Abstract:: Understanding the dynamics of open marine populations is difficult. Ecological processes may vary with the spatial structure of the habitat, and this variation may subsequently affect demographic rates. In a series of observational and experimental studies in the Bahamas, I examined the roles of emigration, mortality, and predation in the...
Resource Type:: Dissertation
Full Text:: Predation by Karen L. Overholtzer-McLeod A DISSERTATION submitted to Oregon State University in

Role of priority effects and habitat complexity in coral-reef fish communities

Creator:: Almany, Glenn R.
Abstract:: Understanding the processes that influence the composition of animal communities is a central goal in ecology. Interactions between established residents and colonizing juveniles that affect the subsequent survival of juveniles may influence community composition. In a series of experiments on coral reef fish communities in the Bahamas and Australia, I...
Resource Type:: Dissertation
Full Text:: influence the composition of animal communities is a central goal in ecology. Interactions between

The relationships between fluctuations in oceanographic conditions, forage fishes, predatory fishes, predator food habits, and juvenile salmonid marine survival off the Columbia River

Creator:: Emmett, Robert L.
Abstract:: Salmonid run sizes are strongly affected by their early marine stage. Fully understanding the life history of salmonids means understanding how they interact with their marine environment and with other fishes. Changes in the biological and physical environment off the Columbia River region affects the distribution and abundance of predatory...
Resource Type:: Dissertation
Full Text:: by Robert L. Emmett A DISSERTATION submitted to Oregon State University

Diel activity patterns in demersal fishes on Heceta Bank, Oregon

Creator:: Hart, Ted
Abstract:: Most fishes exhibit differences in activity patterns from day to night, with a switch from high to low activity at dusk and reverse at dawn. Marine reef fishes show similar behavior among sites, despite dissimilar species assemblages, suggesting that common selection pressures are leading to convergent behavior. Few studies to...
Resource Type:: Masters Thesis
Full Text:: in Demersal Fishes on Heceta Bank, Oregon Abstract approved: Signature redacted for privacy

Fish assemblage organization in the Amazon River floodplain : species richness, spatial distribution and recruitment processes

Creator:: Petry, Paulo
Abstract:: The composition and distribution of fish assemblages was examined in a floodplain lake system in the Amazon basin. Quantitative samples were collected during the 1992-1993 flooding season at Marchantaria Island, Solimoes River. A total of 25,819 specimens representing 8 orders, 30 families, 101 genera and 139 species of fish were...
Resource Type:: Dissertation
Full Text:: Distribution and Recruitment Processes by Paulo Petry A THESIS submitted to Oregon State University in

Heterogeneous thermal habitat for northeast Oregon stream fishes

Creator:: Ebersole, Joseph L.
Abstract:: Discrete coldwater patches within warm streams provide potential thermal refuge for coldwater fishes during periods of heat stress. This analysis focused on heterogeneity in stream water temperatures as influenced by local influx of cooler subsurface waters. Using field thermal probes and recording thermistors, we identified and characterized coldwater patches potentially...
Resource Type:: Dissertation
Full Text:: in the ecology and life history of salmonids and co-occurring stream fishes in northeast Oregon

Factors affecting the dynamics and regulation of coral-reef fish populations

Creator:: Webster, Michael Scott
Abstract:: Ecologists have long questioned why fluctuating populations tend to persist rather than go extinct. Populations that persist indefinitely are regulated by mechanisms that cause demographic density dependence, which works to bound fluctuation above zero. In a series of studies, I have sought to determine the processes and mechanisms that regulate...
Resource Type:: Dissertation
Full Text:: Populations by Michael S. Webster A THESIS submitted to Oregon State University in partial fulfillment

ScholarsArchive@OSU

Relationships among in-stream physical habitat, land use, and geology in small coastal streams of northern Oregon

A geographical framework for assessing longitudinal patterns in stream habitat and fish distribution

Seasonal floodplain wetlands as fish habitat in Oregon and Washington

Population dynamics of coral-reef fishes : spatial variation in emigration, mortality, and predation

Role of priority effects and habitat complexity in coral-reef fish communities

The relationships between fluctuations in oceanographic conditions, forage fishes, predatory fishes, predator food habits, and juvenile salmonid marine survival off the Columbia River

Diel activity patterns in demersal fishes on Heceta Bank, Oregon

Fish assemblage organization in the Amazon River floodplain : species richness, spatial distribution and recruitment processes

Heterogeneous thermal habitat for northeast Oregon stream fishes

Factors affecting the dynamics and regulation of coral-reef fish populations

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