Index Catalog // ScholarsArchive@OSU

A simulation model of wood dynamics in Pacific Northwest streams

Creator:: Meleason, Mark Alan
Abstract:: Conceptually, the dynamics of wood in streams can be viewed in terms of input and in-channel processes. Input processes are associated with both the riparian (tree fall, bank cutting, windthrow) and upslope forests (mass failures). In-channel processes include log breakage, movement, and decomposition. A mechanistic view of these processes is...
Resource Type:: Dissertation
Full Text:: proposed. Most tree species in riparian forests in the Pacific Northwest are also common to upland forest

The effects of pathogens, UV-B radiation, and introduced species on amphibians in the Pacific Northwest

Creator:: Kiesecker, Joseph Michael
Abstract:: I examined two amphibian communities to assess factors that may impact amphibian biodiversity. The results suggest that the potential factors which influence the maintenance of amphibian biodiversity are multi-faceted and thus, attempts to understand these factors must reflect these complexities. I investigated factors that influenced the susceptibility of western toad...
Resource Type:: Dissertation
Full Text:: species on amphibians in the Pacific Northwest AN ABSTRACT OF THE THESIS OF Joseph M. Kiesecker for

Anthropogenic activities associated with the status of salmon stocks in Pacific Northwest watersheds

Creator:: Mrakovcich, Karina Lorenz
Abstract:: Stocks of salmon are declining in the Pacific Northwest. Based on region-wide studies that list and categorize the status of salmon stocks (Nehlsen et al., 1991; Huntington et al., 1994; and Nawa, 1995), I analyze the watersheds where stocks of salmon spawn for several anthropogenic variables, most of which are...
Resource Type:: Dissertation
Full Text:: stocks in Pacific Northwest watersheds AN ABSTRACT OF THE THESIS OF Karina Lorenz Mrakovcich for the

Effects of canopy gaps in Douglas-fir forests and resource gradients on fecundity and growth of understory herbs

Creator:: St. Pierre, Elizabeth A. (Elizabeth Ann)
Abstract:: Effects of small-scale disturbances on fecundity and growth rates of Linnaea borealis L., Tiarella trifoliata L. var. unifoliata, and Trillium ovatum Pursh. were studied in old-growth forests in the Tsuga heterophylla Zone on the west slope of the Cascade Mountain Range of Oregon. Performance of each species was compared in...
Resource Type:: Dissertation

Potential carbon storage at the landscape scale in the Pacific Northwest, U.S.A.

Creator:: Smithwick, Erica Ann Hoffa
Abstract:: Estimates of potential carbon (C) storage can be used to constrain predictions of future carbon sequestration and to understand the degree to which disturbances, both natural aid anthropogenic, affect C storage. An upper bound on C storage in the Pacific Northwest (PNW) of the United States was estimated using field...
Resource Type:: Dissertation
Full Text:: : Potential Carbon Storage at the Landscape Scale in the Pacific Northwest, U.S.A. Abstract approved

The influence of biophysical feedbacks and species interactions on grass invasions and coastal dune morphology in the Pacific Northwest, USA

Creator:: Zarnetske, Phoebe Lehmann
Abstract:: Biological invasions provide a unique opportunity to study the mechanisms that regulate community composition and ecosystem function. Invasive species that are also ecosystem engineers can substantially alter physical features in an environment, and this can lead to cascading effects on the biological community. Aquatic-terrestrial interface ecosystems are excellent systems to...
Resource Type:: Dissertation
Full Text:: Interactions on Grass Invasions and Coastal Dune Morphology in the Pacific Northwest, USA Abstract approved

Analyzing patterns of woody plant richness at multiple spatial scales with modeled photosynthesis

Creator:: Swenson, Jennifer J.
Abstract:: The hump-shaped relationship that predicts highest species richness (species/unit area) at intermediate levels of productivity was examined for woody plants across the Pacific and Inland Northwest of the U.S. Many studies have examined this relationship at regional scales, but commonly use species range maps and surrogate measures of productivity (e.g....
Resource Type:: Dissertation

Nutritional ecology of millipedes in Pacific Northwest conifer forests

Creator:: Baumeister, Nancy C.
Abstract:: Comminution of forest leaf litter by millipedes affects litter decomposition and nutrient cycling. The millipede Harpaphe haydeniana Wood (Polydesmida: Xystodesmidae) is common in low to mid-elevation forests on the Pacific Coast of North America. In a series of experiments, the suitability of broadleaf and conifer tree litters for growth of...
Resource Type:: Dissertation

Oceanographic effects on the dynamics of food habits and growth condition of some groundfish species of the Pacific Northwest

Creator:: Lee, Yong Woo
Abstract:: Marine fish are subject to direct and indirect oceanographic variations operating at short and long time scales. In this study feeding habits and long-term growth condition of several groundfish species of the Pacific Northwest are examined to understand the relationship between variations in the fish's biological and life history components...
Resource Type:: Dissertation

The influence of parasite ecology on the genetic structure of parasite populations

Creator:: Criscione, Charles David
Abstract:: Parasites are unique study organisms for evolutionary ecologists. Yet, molecular ecology studies on parasites have lagged far behind those on free-living organisms. The goal of the review in Chapter 2 was to illustrate areas of research that may be of particular interest in relation to the parasitic life style and...
Resource Type:: Dissertation

ScholarsArchive@OSU

A simulation model of wood dynamics in Pacific Northwest streams

The effects of pathogens, UV-B radiation, and introduced species on amphibians in the Pacific Northwest

Anthropogenic activities associated with the status of salmon stocks in Pacific Northwest watersheds

Effects of canopy gaps in Douglas-fir forests and resource gradients on fecundity and growth of understory herbs

Potential carbon storage at the landscape scale in the Pacific Northwest, U.S.A.

The influence of biophysical feedbacks and species interactions on grass invasions and coastal dune morphology in the Pacific Northwest, USA

Analyzing patterns of woody plant richness at multiple spatial scales with modeled photosynthesis

Nutritional ecology of millipedes in Pacific Northwest conifer forests

Oceanographic effects on the dynamics of food habits and growth condition of some groundfish species of the Pacific Northwest

The influence of parasite ecology on the genetic structure of parasite populations

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