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Understory herb and shrub responses to root trenching, pre-commercial thinning, and canopy closure in Douglas-fir forest of the western Cascades, Oregon

Creator:: Lindh, Briana C.
Abstract:: This thesis examines factors limiting understory herb presence and flowering in young second-growth Douglas-fir (Pseudotsuga menziesii) forests on the west side of the Cascade Mountains, Oregon, USA. I studied the belowground effects of canopy trees on understory herbs and shrubs in old-growth forests using trenched plots from which tree roots...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Briana C. Lindh for the

The morphological events during the self-reassembly of the sea urchin embryo in culture

Creator:: Hamada, Spencer Hiroshi
Abstract:: The gastrula of the sea urchin Strongylocentrotus purpuratus was dissociated into single cells. In culture these cells appeared apolar, but reassembled into quasi-normal embryos composed of structures with polarized cells. In this study emphasis was placed on those morphological events coincident with the reestablishment of a polar orientation within the...
Resource Type:: Dissertation
Full Text:: SELF-REASSEMBLY OF THE SEA URCHIN EMBRYO IN CULTURE Redacted for Privacy Abstract approved Patricia

Implications of cougar prey selection and demography on population dynamics of elk in northeast Oregon

Creator:: Clark, Darren A.
Abstract:: Mule deer (Odocoileus hemionus hemionus) and Rocky Mountain elk (Cervus canadensis nelsoni; hereafter elk) populations in northeast Oregon have declined in the past 10 to 20 years. Concurrent with these declines, cougar (Puma concolor) populations have apparently increased, leading to speculation that predation by cougars may be responsible for declining...
Resource Type:: Dissertation
Full Text:: Abstract approved: ________________________________________________________ Patricia L. Kennedy

An ultrastructure study of oogenesis in the sea urchin, Strongylocentrotus purpuratus

Creator:: Chatlynne, Louise Geller
Abstract:: Oogenesis in the sea urchin Strongylocentrotus purpuratus was studied at the fine structural level, with special emphasis on the relationship between the two main cell types within the ovary: the egg cells and the nutritive phagocytes, or accessory cells. The nutritive phagocytes are flagellated cells with extensive pseudopods which store...
Resource Type:: Dissertation
Full Text:: .; ), Typed by Susie Kozlik for Louise Geller Chatlynne ACKNOWLEDGMENT I wish to thank Dr. Patricia Harris

Gender differences in the perceptions of sexual abuse

Creator:: Sandras, Eric
Abstract:: The purpose of this study is to explore gender differences in adult perceptions of sexual abuse encounters between an adult male and children of both genders and of various ages. Subjects were four hundred and fifty three students from a northwestern university. They were recruited from a lower-level human development...
Resource Type:: Dissertation
Full Text:: Sexual Abuse. Abstract approved: Patricia Moran The purpose of this study is to explore gender

Externalized and internalized manifestations of child maltreatment

Creator:: Chang, I-Tung Joyce
Abstract:: Although child maltreatment has been studied for several decades, there are still substantial gaps of understanding essential areas such as the consequences of child maltreatment and the variability in the impact of different types of maltreatment. This study examined whether externalization and internalization are two valid and distinctive dimensions in...
Resource Type:: Dissertation

Ecological relationships between cervid herbivory and understory vegetation in old-growth Sitka spruce-western hemlock forests in western Washington

Creator:: Happe, Patricia Jenkins
Abstract:: The relationships between black-tailed deer (Odocoileus hemionus columbianus) and Roosevelt elk (Cervus elaphus roosevelti) herbivory and understory vegetation in unmanaged forests in Olympic National Park were studied from 1985 - 1989. From 1985 to 1986 I studied the impact of cervid exclusion on shrub, fern, and forb forage quality, tannin...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Patricia J. Happe for the degree

Academic achievement trajectories of adolescents from Mexican and East Asian immigrant families

Creator:: Jeong, Yu Jin
Abstract:: Academic achievement of adolescent children is directly associated with their success in adulthood. Little is known, however, regarding how adolescents in immigrant families academically grow over time and what factors influence the trajectories. Drawing on the National Educational Longitudinal Survey 1988 (NELS: 88), this study aimed to: 1) identify the...
Resource Type:: Dissertation
Full Text:: : __________________________________________________________________ Alan C. Acock Academic achievement of adolescent children is directly associated with their

Perceptions on Spalted Wood: The Influence of Historic Spalting Patterns and Valuation of Spalted Wood Around the World.

Creator:: Vega Gutiérrez, Patricia T.
Abstract:: During the 1400s – 1600s, spalted wood was an expensive commodity used in marquetry style artworks across primarily Germany and Italy. It fell out of favor during the Industrial Revolution, but is currently experiencing resurgence in popularity with US woodturners. How spalted wood is used, and what types of spalted...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Patricia

Light and electron microscopy of chloroplasts in Equisteum gametophytes

Creator:: Hook, Patricia Waynette, 1941-
Abstract:: Spores of Equisetum were germinated and the resulting gametophytes grown to maturity in standard microcultures. Light and electron microscope observations were made of the chloroplasts within the gametophytes. These chloroplasts were found to be oval to dumb-bell shaped organelles possessing organized grana. By means of time-lapse movies they were shown...
Resource Type:: Dissertation
Full Text:: Equisteum gametophytes AN ABSTRACT OF THE THESIS OF PATRICIA WAYNETTE HOOK for the in (Name) BOTANY

ScholarsArchive@OSU

Understory herb and shrub responses to root trenching, pre-commercial thinning, and canopy closure in Douglas-fir forest of the western Cascades, Oregon

The morphological events during the self-reassembly of the sea urchin embryo in culture

Implications of cougar prey selection and demography on population dynamics of elk in northeast Oregon

An ultrastructure study of oogenesis in the sea urchin, Strongylocentrotus purpuratus

Gender differences in the perceptions of sexual abuse

Externalized and internalized manifestations of child maltreatment

Ecological relationships between cervid herbivory and understory vegetation in old-growth Sitka spruce-western hemlock forests in western Washington

Academic achievement trajectories of adolescents from Mexican and East Asian immigrant families

Perceptions on Spalted Wood: The Influence of Historic Spalting Patterns and Valuation of Spalted Wood Around the World.

Light and electron microscopy of chloroplasts in Equisteum gametophytes

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