Index Catalog // ScholarsArchive@OSU

Spatial and temporal patterns of fire in the forests of the central Oregon Coast Range

Creator:: Impara, Peter C.
Abstract:: Fire history and fire regime were interpreted from tree ring analysis of 4320 stumps at 178 sites in a 25 by 55 km area in the central Oregon Coast Range. A total of 27 fire episodes were identified in a 516 year period, with sizes estimated at 18 to 544...
Resource Type:: Dissertation
Full Text:: pre-existing stands: only 347 trees examined (8%) were >400 years old, and none exceeded 516 years

Nitrogen and dry matter relationships for winter wheats produced in western Oregon

Creator:: Locke, Kerry A.
Resource Type:: Dissertation
Full Text:: (SWWW) is >12% and <10%, respectively (Schlehuber and Tucker, 1967; PNW Crop Improvement Association

Mycorrhizal fungi and their relationship to plant succession in subalpine habitats

Creator:: Cazares, Efren
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

Mycorrhizal and other root endophytic fungi of lupines in the Pacific Northwest

Creator:: O'Dell, Thomas E.
Abstract:: We investigated the root endophytic fungi of lupine using four approaches: (1) occurrence of fungal colonization in field-collected roots; (2) growth response of L. latifolius to inoculation with two types of fungi; (3) structure of root colonizations of Pinus and Lupinus by Phialocephala fortinii, a septate endophytic fungus of lupine;...
Resource Type:: Dissertation

Meadowfoam oil yield as influenced by dry matter production and partitioning, flower number, and honey bee density

Creator:: Norberg, O. Steven
Resource Type:: Dissertation

Epidemiology and population biology of Inonotus tomentosus as a pathogen of forests of British Columbia

Creator:: Lewis, Katherine JoAnn
Abstract:: The root disease fungus Inonotus tomentosus, common in the old growth boreal forests of British Columbia, poses a threat to the health of second growth forests established on sites with a previous history of root disease. Colonized stumps occur in groups of 1 to 6; the groups are clumped within...
Resource Type:: Dissertation

Understory vegetation response and nitrogen cycling following cutting of western juniper

Creator:: Bates, Jonathan D.
Abstract:: Since the late 1880's western juniper has expanded in range and increased in density in sagebrush-bunchgrass, riparian, and forested plant communities of the Pacific Northwest. Succession to western juniper woodland has been shown to reduce the productivity and diversity of the understory component, result in concentration of soil nutrients beneath...
Resource Type:: Dissertation

Post-eruption recovery and secondary production of grazing insects in two streams near Mt. St. Helens

Creator:: Meyerhoff, Richard Dietrich
Abstract:: The eruption of Mt. St. Helens provided the opportunity to study secondary production of grazing insects in the context of disturbance. Two stream sites were chosen that significantly differed in how their watersheds were impacted by the eruption. Clearwater Creek was catastrophically disturbed (physical alteration of habitat, loss of riparian...
Resource Type:: Dissertation
Full Text:: Foundation (Grant DEB 85-069) and by a cooperative agreement with the U.S. Forest Service (PNW 80-277

Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition

Creator:: Halaj, Juraj
Abstract:: This work examined the importance of structural complexity of habitat, availability of prey, and competition with ants as factors influencing the abundance and community composition of arboreal spiders in western Oregon. In 1993, I compared the spider communities of several host-tree species which have different branch structure. I also assessed...
Resource Type:: Dissertation

ScholarsArchive@OSU

Spatial and temporal patterns of fire in the forests of the central Oregon Coast Range

Nitrogen and dry matter relationships for winter wheats produced in western Oregon

Mycorrhizal fungi and their relationship to plant succession in subalpine habitats

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

Mycorrhizal and other root endophytic fungi of lupines in the Pacific Northwest

Meadowfoam oil yield as influenced by dry matter production and partitioning, flower number, and honey bee density

Epidemiology and population biology of Inonotus tomentosus as a pathogen of forests of British Columbia

Understory vegetation response and nitrogen cycling following cutting of western juniper

Post-eruption recovery and secondary production of grazing insects in two streams near Mt. St. Helens

Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition

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