Index Catalog // ScholarsArchive@OSU

Comparison of stand development of a deciduous-dominated riparian forest and a coniferous-dominated riparian forest in the Oregon Coast Range

Creator:: Poage, Nathan Jeremy
Abstract:: Riparian forests in the central Oregon Coast Range vary along a coniferous-deciduous compositional continuum. Variations in structure and composition affect water quality, fish and wildlife, biodiversity, timber, and aesthetics. A retrospective approach was taken in this study in order to understand and compare the structure, pattern, and history of an...
Resource Type:: Masters Thesis

Structural development of late successional forests in the central Oregon Coast Range : abundance, dispersal, and growth of western hemlock (Tsuga heterophylla) regeneration

Creator:: Schrader, Barbara A.
Abstract:: Patterns of western hemlock regeneration were studied in relation to forest structural development and environment in the Oregon Coast Range. Density of western hemlock seedlings was examined across the climatic gradient from cool, moist coastal areas to the seasonally hot and dry Willamette Valley Margin. Seedling densities were most strongly...
Resource Type:: Dissertation

Watershed-scale vegetation patterns in a late-successional forest landscape in the Oregon Coast Range

Creator:: Wimberly, Michael C.
Abstract:: Knowledge about vegetation patterns and ecological processes in unmanaged, late-successional watersheds is needed to provide a foundation for forest management strategies aimed at conserving native biodiversity. I examined influences of environmental variability and disturbance history on forest structure and composition in the Cummins Creek Wilderness, located on the central Oregon...
Resource Type:: Dissertation

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

Regional gradient analysis and spatial pattern of woody plant communities in Oregon

Creator:: Ohmann, Janet L.
Abstract:: Knowledge of regional-scale patterns of plant community structure and controlling factors is largely qualitative and based on numerous local studies. Data from a subsample of 10,000 field plots were used to quantify and map compositional gradients of woody plant communities across Oregon forests. Canonical correspondence analyses explained 9-14% of the...
Resource Type:: Dissertation
Full Text:: : _____________________ _ Thomas A. Spies Knowledge of regional-scale patterns of plant community structure and

Development of two coniferous stands impacted by multiple, partial fires in the Oregon Cascades : establishment history and the spatial patterns of colonizing tree species relative to old-growth remnant trees

Creator:: Goslin, Matthew N.
Abstract:: Trees that survive disturbances can form a prominent legacy which may influence post-disturbance successional pathways. The effects of biological legacies on community dynamics is a critical question in ecology. In the present study, I examined two mapped stands in which old-growth remnant trees, survivors of partial fires, emerge above a...
Resource Type:: Masters Thesis

Tree seedling establishment on heterogenous microsites in Douglas-fir forest canopy gaps

Creator:: Gray, Andrew N.
Abstract:: Tree seedling establishment and growth were studied in experimental canopy gaps to determine the effect of structural and environmental heterogeneity on species dynamics within mature and old-growth Douglas-fir forests in the Cascades of central Oregon and southern Washington. Factors examined included forest age, gap size, within-gap position. substrate, year of...
Resource Type:: Dissertation

Disturbance, tree mortality, and implications for contemporary regional forest change in the Pacific Northwest

Creator:: Reilly, Matthew J. and Spies, Thomas A.
Abstract:: Tree mortality is an important demographic process and primary driver of forest dynamics, yet there are relatively few plot-based studies that explicitly quantify mortality and compare the relative contribution of endogenous and exogenous disturbances at regional scales. We used repeated observations on 289,390 trees in 3673 1 ha plots on...
Resource Type:: Article
Full Text:: @oregonstate.edu (M.J. Reilly). Matthew J. Reilly a,⇑, Thomas A. Spies b aDepartment of Forest Ecosystems and

Structure and composition of unmanaged riparian forests in the coastal mountains of Oregon, U.S.A.

Creator:: Pabst, Robert J. and Spies, Thomas A.
Abstract:: We characterized the structure and composition of unmanaged riparian forests in three river basins in Oregon’s coastal mountains. Our objective was to evaluate stand attributes at three spatial scales: streamside (site), drainage network (stream order), and basin (subregion). Data on basal area, species composition, snag density, canopy cover, and tree...
Resource Type:: Article
Full Text:: forests in the coastal mountains of Oregon, U.S.A.1 Robert J. Pabst and Thomas A. Spies Abstract: We

Rambo, Thomas Roy1998.zip

Creator:: Rambo, Thomas Roy
Abstract:: Species richness and abundance of forest floor bryophytes, including epiphytes from incorporated litterfall, were assessed at two sites in western Oregon. Bryophyte diversity, abundance, and community composition were compared between sites, and between young forest stands ([approximately] 55 yrs.) and old-growth stands (400+ yrs.) within each site. Relationships of stand...

ScholarsArchive@OSU

Comparison of stand development of a deciduous-dominated riparian forest and a coniferous-dominated riparian forest in the Oregon Coast Range

Structural development of late successional forests in the central Oregon Coast Range : abundance, dispersal, and growth of western hemlock (Tsuga heterophylla) regeneration

Watershed-scale vegetation patterns in a late-successional forest landscape in the Oregon Coast Range

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

Regional gradient analysis and spatial pattern of woody plant communities in Oregon

Development of two coniferous stands impacted by multiple, partial fires in the Oregon Cascades : establishment history and the spatial patterns of colonizing tree species relative to old-growth remnant trees

Tree seedling establishment on heterogenous microsites in Douglas-fir forest canopy gaps

Disturbance, tree mortality, and implications for contemporary regional forest change in the Pacific Northwest

Structure and composition of unmanaged riparian forests in the coastal mountains of Oregon, U.S.A.

Rambo, Thomas Roy1998.zip

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