Index Catalog // ScholarsArchive@OSU

Evolutionary and ecological interactions affecting seaweeds

Creator:: Olson, Annette M.
Abstract:: The term "interaction" in evolutionary biology and ecology describes the relationships among variables in two classes of causal models. In the first, "interaction" refers to the influence of a single putatively causal variable on a variable of interest. In the second class of models, the term applies when a third...
Resource Type:: Dissertation
Full Text:: Abstract approved: Jane Lubchenco The term "interaction" in evolutionary biology and ecology describes

A model of trophic evolutionary pathways

Creator:: Morris, A. Kimo
Abstract:: Calow (1983) realized that differences between parasites and their free-living relatives can be explained by the differences in nutrient richness. I propose a model that is based on Calow's idea which identifies the relative position of different trophic strategies (e.g. predation, grazing, parasitism and others) based on (1) the differences...
Resource Type:: Masters Thesis
Full Text:: A model of trophic evolutionary pathways AN ABSTRACT OF THE

Evolutionary history and speciation of the genus Tragopan

Creator:: Islam, Kamal
Abstract:: A study of the phyletic relationships among five species of tragopans and an outgroup, the Blood Pheasant (Ithaginis cruentus), was conducted from 1987 to 1991. Biochemical, behavioral, and external morphologic characteristics were compared. A cladistic approach was used to compare the behavioral, biochemical, and external morphologic data collectively, as different...
Resource Type:: Dissertation
Full Text:: Evolutionary history and speciation of the genus Tragopan

Physical and chemical characteristics of the Yaquina Estuary, Oregon

Creator:: Callaway, R. J., Specht, David T., and National Health and Environmental Effects Research Laboratory (U.S.). Western Ecology Division. Coastal Ecology Branch
Abstract:: "After a brief description of the setting of the Yaquina Estuary, estuarine dynamics and classification, and estuarine chemistry are presented. Then, temperature-salinity relations are reviewed using the Rattray-Officer model in simulating variable distributions reported by Callaway and Specht (1982) and Callaway (1991). Finally, the numerical models DynHyd and WASP are...
Resource Type:: Technical Report
Full Text:: . Box 57 Corvallis, OR 97339 David 1. Specht, Project Officer Coastal Ecology Branch U.S

Quantifying physical habitat in wadeable streams : surface waters

Creator:: Kaufmann, Phillip R., Levine, Paul, Robison, E. George, Seeliger, Curt, and Peck, David V.
Abstract:: We describe concepts, rationale, and analytical procedures for characterizing physical habitat in wadeable streams based on raw data generated from methods similar or equal to those of Kaufmann and Robison (in PB99-139156). We provide guidance for calculating measures or indices of stream size and gradient, sinuosity, substrate size and stability,...
Resource Type:: Technical Report

Life history and evolutionary adaptation of Pacific salmon and its application in management

Creator:: Wevers, Mary Jo
Abstract:: An approach to understanding and managing anadromous salmon, steelhead, and sea-run cutthroat trout (Oncorhynchus spp.) based on life history and evolutionary adaptive capacities of species and stocks is presented. Species, stocks, and local populations are viewed as systems that are continuously adapting to changing environmental conditions. They have the potential...
Resource Type:: Dissertation
Full Text:: Life history and evolutionary adaptation of Pacific

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:: burning Willamette Valley wetland prairies to maintain and enhance desired species. This research

Fire effects on vegetation diversity, structure, and successional dynamics in shrub-steppe and mixed conifer environments of the Hells Canyon, Idaho

Creator:: Havlina, Douglas William
Abstract:: The effects of fire severity on post-fire succession and shrub demography were quantified in shrub-steppe grasslands and subalpine forests in the Hells Canyon of the Payette National Forest, Idaho. Following the 1988 Eagle Bar Fire, species frequency, community diversity, fire adaptations, and stand ages were quantified at 12 plots in...
Resource Type:: Masters Thesis
Full Text:: research addressing disturbance ecology in the environments of the Hells Canyon is central to ecosystem

Lichens, earth tongues, and endophytes: evolutionary patterns inferred from phylogenetic analyses of multiple loci

Creator:: Platt, Jamie L.
Resource Type:: Dissertation
Full Text:: Lichens, earth tongues, and endophytes : evolutionary patterns

Blue grouse winter ecology in northeastern Oregon

Creator:: Pelren, Eric C.
Resource Type:: Dissertation
Full Text:: Doctor of Philosophy in Wildlife Science presented on June 21. 1996. Title: Blue Grouse Winter Ecology

ScholarsArchive@OSU

Evolutionary and ecological interactions affecting seaweeds

A model of trophic evolutionary pathways

Evolutionary history and speciation of the genus Tragopan

Physical and chemical characteristics of the Yaquina Estuary, Oregon

Quantifying physical habitat in wadeable streams : surface waters

Life history and evolutionary adaptation of Pacific salmon and its application in management

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

Fire effects on vegetation diversity, structure, and successional dynamics in shrub-steppe and mixed conifer environments of the Hells Canyon, Idaho

Lichens, earth tongues, and endophytes: evolutionary patterns inferred from phylogenetic analyses of multiple loci

Blue grouse winter ecology in northeastern Oregon

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