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  • Fescue taxonomy in the Pacific coast states

    Creator:
    Wilson, Barbara L.
    Abstract:
    Accurate taxonomy is essential to preservation and management of native grasses. Four problems in fescue taxonomy were investigated: the identity of the native fescue that dominates western Oregon and Washington prairies, the relationship of native Festuca roemeri to closely related grasses, the status of F. howellii and F. washingtonica, and...
    Resource Type:
    Dissertation
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    the Pacific Coast States by Barbara L. Wilson A THESIS submitted to Oregon State University in

  • Responses of forest understory plants to burial by volcanic tephra from Mount St. Helens, Washington

    Creator:
    Antos, Joseph A.
    Abstract:
    The effects of burial by tephra (volcanic aerial ejecta) on forest understory plants were examined northeast of Mount St. Helens, Washington, in the area where the 18 May 1980 eruption deposited tephra but did not destroy canopy trees. At six sites along a tephra depth gradient from 2-15 cm, understory...
    Resource Type:
    Dissertation
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    volcanic tephra from Mount St. Helens, Washington AN ABSTRACT OF THE THESIS OF Joseph A. Antos for the

  • Evolution and risk in conservation of Pacific salmon

    Creator:
    Currens, Kenneth P.
    Abstract:
    Identifying appropriate units for conservation requires knowledge of evolutionary patterns and risks of managing at different geographical and genetic scales. I examined genetic diversity at different geographical scales among 11,400 rainbow trout (Oncorhynchus mykiss) from 243 locations in 13 major river basins throughout much of their range and among coho...
    Resource Type:
    Dissertation
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    River 1985 Coweeman River A 12 Skamania summer strain 1985 South Santiarn Hatchery A 13 Skamania summer

  • A morphologic and morphometric analysis of the "Sorex vagrans species complex" in the Pacific Coast region

    Creator:
    Carraway, Leslie N.
    Abstract:
    Shrews of the "Sorex vagrans species complex" were classified into nine taxa on the basis of morphologic and morphometric analyses of 2,299 specimens from Washington, west of the Cascade Mountains in Oregon, and in the Coast Ranges of California. In Washington, Sorex monticolus setosus and S. m. obscurus occur west...
    Resource Type:
    Dissertation
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    " in the Pacific Northwest of the United States. 7 Fig. 2--Maps of Washington, Oregon, and

  • Assessing Managed Aquifer Recharge Potential: Regional to Local Evaluation

    Creator:
    Gibson, Maria
    Abstract:
    Although surface water constitutes less than 1.5% of freshwater supply, historical development of surface water sources continues to mark the landscape. However, over- exploitation of groundwater is now at its highest, and 25% of the world’s 1.7 billion population live in water scare regions. As glaciers and snowpack disappear due...
    Resource Type:
    Dissertation
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    location of research. Regional and local information on the Washington State and the Yakima River

  • Origin and distribution of polyploid Achillea (Compositae) in western North America

    Creator:
    Tyrl, Ronald J.
    Abstract:
    A cytogeographical study was made of populations of tetraploid (n=18) and hexaploid (n=27) Achillea millefolium (Compositae- Anthemideae) from the Pacific Coast states. There is a complex distributional pattern, involving overlapping ranges, mixed populations, migration of one form into areas occuplied by the other, pentaploid hybrids, and septaploid and octoploid plants....
    Resource Type:
    Dissertation
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    Yaqui na R. ,56 Al sea R. Willamette R. The Dallas COLUMBIA RIVER IN EASTERN OREGON MD WASHINGTON

  • Metagenomics, barcoding, and metabarcoding statistical analysis to facilitate integrative genomic studies of microbial and eukaryotic assemblages

    Creator:
    Senn, Savanah
    Abstract:
    The body of work aims to contribute to the area of Quantitative analysis in Environmental Sciences, and is focused on the microbiome. The underlying theme for the dissertation is methods and workflow. The unique bioinformatics workflow used for the analysis of genomic data was used to answer distinct and pressing...
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    Dissertation
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    was $6.5 billion (Federal Reserve Economic Data) and a population of over 10 million (United States

  • Revision of the genus Platylygus (Heteroptera: Miridae)

    Creator:
    Equihua-Martinez, Armando
    Abstract:
    The genus Platylygus Van Duzee was erected in 1915 and revised by Kelton and Knight in 1970 describing 26 new species from United State and Mexico. Despite this prior revision, taxonomic problems have been encountered with the use of the keys and in the identification given the close similarity among...
    Resource Type:
    Dissertation
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    collections in Canada, United States and Canada, limited collecting in the state of Oregon, study of male

  • California condors in the Pacific Northwest : integrating history, molecular ecology, and spatial modeling for reintroduction planning

    Creator:
    D'Elia, Jesse
    Abstract:
    Reintroduction programs are increasingly being used to save animals from extinction and aid in their recovery. The California Condor (Gymnogyps californianus), one of the most endangered birds in the world, is a remarkable example of how reintroduction programs can help rapidly increase a species' population numbers and range following a...
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    Dissertation
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    sites “in the states occupied by condors in the recent past (Oregon, Washington, California, possibly

  • A systematic study of Lathyrus vestitus Nutt. ex T. & G. (Fabaceae) and allied species of the Pacific Coast

    Creator:
    Broich, Steven L.
    Abstract:
    Eight species of Lathvrus (Fabaceae, Faboideae) endemic to the Pacific Coast of North America were the subject of a systematic investigation. Taxa studied included Lathvrus vestitus, Nutt. ex T. & G., L. laetif lorus Greene, L.. iepsonii Greene, £,. splendens Kellogg, L. polvphvllus, Nutt. ex T. & G., L. holochlorus...
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    Dissertation
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    of Washington (WTU), Humboldt State University (HSU), the herbarium at Rancho Santa Ana Botanical