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  • Value assessment of Jackson-Frazier Wetland, Benton County, Oregon : a case study

    Creator:
    Marshall, John L. (John Lee), 1952-
    Abstract:
    A growing realization that wetlands are potentially valuable resources has recently stimulated efforts towards their protection. While a foundation for wetland management exists, decision makers still lack adequate tools for addressing issues of wetland preservation vs. development. Wetland preservation values are often neglected in traditional market analyses and in the...
    Resource Type:
    Masters Thesis

  • The stratigraphy, hydrology, and redoximorphic character of the Jackson-Frazier wetland

    Creator:
    D'Amore, David V.
    Abstract:
    Transitional areas between upland and aquatic habitats, commonly known as wetland, were once viewed as unproductive areas and were drained for farming or pasture. Wetlands are now accepted as significant ecological resources, and their protection is a mandate of federal, state, and local land managers. Due to the diversity of...
    Resource Type:
    Masters Thesis
    Full Text:
    Character of the Jackson-Frazier Wetland by David V. D'Amore A THESIS submitted to Oregon

  • Multiscale relationships of wintering birds with riparian and wetland habitat in the Willamette Valley, Oregon

    Creator:
    Adamus, Paul R.
    Abstract:
    Relatively little is known about wintering bird communities in lowlands of the Pacific Northwest, yet, the condition of winter habitats potentially can pose a major constraint on bird populations. I initiated a study to determine: (1) Which avian species use lowland riparian and wetland habitats in the Willamette Valley during...
    Resource Type:
    Dissertation
    Full Text:
    Relationships of Wintering Birds with Riparian and Wetland Habitat in the Willamette Valley, Oregon Abstract

  • Hydrologic and vegetation responses associated with restoration of wetlands in the Willamette Valley, Oregon

    Creator:
    Coleman, Gregory A.
    Abstract:
    I examined hydrological and plant community changes associated with the implementation of a restoration management plan in two riparian meadows located within an agricultural landscape of the central Willamette Valley, Oregon. I established exclosure fencing (a form of passive restoration) in one agricultural field and established fencing and plugged a...
    Resource Type:
    Masters Thesis
    Full Text:
    WETLANDS [N THE WILLAMETTE VALLEY, OREGON. 7 PLANT SPECIES SUCCESSION [N TWO RESTORED RIPARIAN WETLAND

  • Hydrology and delineation in four wetlands in the Oregon Cascades

    Creator:
    MacLeod, Norman A.
    Abstract:
    Four wetland sites were identified and delineated in Silver Falls State Park, Oregon using procedures outlined in the 1989 Federal Manual for the Identification and Delineation of Jurisdictional Wetlands and subsequently monitored for a ten month period. A network of 225 shallow (32") wells was installed throughout the sites to...
    Resource Type:
    Masters Thesis
    Full Text:
    wetland sites were identified and delineated in Silver Falls State Park, Oregon using procedures outlined

  • Plant community dynamics in remnant and restored Willamette Valley wetland prairies

    Creator:
    Schwindt, Rachel A.
    Abstract:
    Invasion by exotic species can pose a major challenge for developing native plant communities in wetland restoration projects. Often native plant communities do not develop as anticipated in restored wetlands due to colonization by exotic species that dominate the native plant community. Despite the time and expense to restore wetlands,...
    Resource Type:
    Masters Thesis
    Full Text:
    Willamette Valley in Oregon to increase populations of threatened species and mitigate for wetland losses

  • Influence of wetland landscape structure of shorebirds wintering in an agricultural valley

    Creator:
    Taft, Oriane Williams
    Abstract:
    Understanding how wetland birds use habitat is pivotal to developing successful and beneficial conservation strategies. Although it has been an ardent topic in forest research for some time, how species interact with the spatial patterning of habitat across a landscape (i.e., landscape structure) has been more or less neglected in...
    Resource Type:
    Dissertation
    Full Text:
    of the Willamette Valley, Oregon, with wetland prairie shown in gray and riparian/wetland forest

  • Vegetation composition and response to fire of native Willamette Valley wetland prairies

    Creator:
    Pendergrass, Kathy L. (Connelly)
    Abstract:
    Fires set by Native Americans were important in shaping and maintaining Willamette Valley prairie plant communities. With fire exclusion after Euro-American settlement in the 1840's, composition of the remaining prairies shifted toward shrub and tree dominance with a concomitant decline in endemic prairie plant populations. I hypothesize that by restoring...
    Resource Type:
    Masters Thesis
    Full Text:
    : Vegetation Composition and Response to Fire of Native Willamette Valley Wetland Prairies. Abstract approved

  • 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:
    . Vicinity map of the wetland site near Arago, Oregon. ................................. 231  59. Vicinity

  • Patterns in responses of an amphibian assemblage to wetland restoration

    Creator:
    Rowe, Jennifer C.
    Abstract:
    Wetland restoration success in attaining wildlife conservation goals can be confounded by the presence of multiple biological invaders. Wetland management activities typically target invasive plants, but bottom-up responses of higher trophic levels in novel communities are difficult to predict. We surveyed plant and amphibian assemblages at 26 sites enrolled in...
    Resource Type:
    Masters Thesis
    Full Text:
    2000). These losses parallel the Oregon state listing of 24% of wetland-dependent amphibians as