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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
Full Text:: Abstract approved: Redacted for Privacy JDonal0 B. Zabel The effects of burial by tephra (volcanic aerial

Comparative water relations of Abies grandis, Abies concolor and their hybrids

Creator:: Yoder, Barbara J.
Abstract:: Comparisons were made of the tissue water relations, stomatal conductance and growth of grand fir (Abies grandis), white fir (Abies concolor) and their hybrids growing in a western Oregon plantation. The grand fir were naturally-regenerated trees native to the study site. White fir and hybrids were the progeny of controlled...
Resource Type:: Masters Thesis

Growth and nutrient content of Chamaecyparis lawsoniana seedlings from contrasting soils in Coos County, Oregon

Creator:: Plocher, Milton David
Resource Type:: Masters Thesis
Full Text:: , Ca, Mg, and S were determined at the beginning and end of the experiment. No one population was

Stomatal activity patterns in provenance plantations of Abies concolor and Abies grandis

Creator:: Keys, Steven Charles
Abstract:: Seedlings from 25 provenances of Abies grandis and Abies concolor were studied at two plantations, 12 at Philomath, Oregon, and 13 at Camino, California. Native seedlings were studied at four of the provenances' field sites. Stomatal infiltration pressure measurements and plant moisture stress measurements were made throughout one summer on...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy Dr. Donald B. Zobel Seedlings from 25 provenances of Abies grandis and Abies

Vegetation and fire history of a Ponderosa pine-white fir forest in Crater Lake National Park

Creator:: McNeil, Robert Curlan
Resource Type:: Masters Thesis
Full Text:: approved: B, Zobel This thesis describes the composition of and some of the environmental controls of the

A comparative study of temperate Chamaecyparis forests

Creator:: Hawk, Glenn M.
Abstract:: The objectives of this study include: (1) analysis of Chamaecyparis lawsoniana, C. taiwanensis, and C. formosensis forests including the structure, composition, and dynamics of plant communities and their environmental relationships; and (2) comparison of the temperate Chamaecyparis forests of Taiwan and the Pacific Northwest with emphasis on structural and successional...
Resource Type:: Dissertation
Full Text:: . From May to September Figure 5. 060 0 404 CURRENT $ A B SW S+SE MONSOON TAIPHOON C Taiwan

Comparison of the water relations characteristics of woody plants in western Oregon

Creator:: Davis, Kent J.
Abstract:: I studied the water relations traits, twig conductivity, C'3 isotopic composition, and wood density of three conifer and five angiosperm species in western Oregon. This study took place from spring 2002 to fall 2003 on four sites. Species were selected to represent the diversity of drought tolerance of woody plants...
Resource Type:: Masters Thesis
Full Text:: , 2005. Major Professor, representing B Plant Pathology Chair of the Department of Botany ñd Plant

Nitrogen fixation by Purshia tridentata : some ecological aspects and root nodule anatomy

Creator:: Dalton, David Andrews
Abstract:: This study examines several aspects of nitrogen fixation by Purshia tridentata (Pursh) D. C., a rosaceous shrub widespread in the central Oregon pumice region, especially as an understory species in Pinus ponderosa and Pinus contorta forests. Anatomical studies of root nodules under the light microscope revealed strong similarities to other...
Resource Type:: Masters Thesis
Full Text:: wish to express my sincere gratitude to Dr. Donald B. Zobel for his guidance and helpful assistance

The relation of soil characteristics to growth and distribution of Chamaecyparis lawsoniana and Thuja plicata in southwestern Oregon

Creator:: Imper, David Kimberly
Abstract:: Twelve plots at six sites in southwestern Oregon were studied to determine the degree to which various soil characteristics are related to the occurrence and growth of Chamaecyparis lawsoniana and Thuja plicata. Soil profiles and vegetation were described in each plot, and measurements were made of insolation, soil and litter...
Resource Type:: Masters Thesis
Full Text:: lkoLltcT B. Zobel Twelve plots at six sites in southwestern Oregon were studied to determine the degree

The ecology of lupines in Crater Lake National Park, Oregon

Creator:: Kerle, Elizabeth A.
Resource Type:: Masters Thesis
Full Text:: National Park. Oregon Redacted for Privacy Abstract approved: Donald b. zdidel The ecology of two N2

ScholarsArchive@OSU

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

Comparative water relations of Abies grandis, Abies concolor and their hybrids

Growth and nutrient content of Chamaecyparis lawsoniana seedlings from contrasting soils in Coos County, Oregon

Stomatal activity patterns in provenance plantations of Abies concolor and Abies grandis

Vegetation and fire history of a Ponderosa pine-white fir forest in Crater Lake National Park

A comparative study of temperate Chamaecyparis forests

Comparison of the water relations characteristics of woody plants in western Oregon

Nitrogen fixation by Purshia tridentata : some ecological aspects and root nodule anatomy

The relation of soil characteristics to growth and distribution of Chamaecyparis lawsoniana and Thuja plicata in southwestern Oregon

The ecology of lupines in Crater Lake National Park, Oregon

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