Index Catalog // ScholarsArchive@OSU

Assessing the Impacts of the Red Imported Fire Ant on First-Generation Monarch Butterfly Reproductive Success in a Texas Coastal Prairie

Creator:: Sutherland, Remy C.
Abstract:: In recent years, monarch butterfly (Danaus plexippus) populations have declined at an alarming rate resulting in an extensive conservation effort across the species’ migratory range. One hypothesis for declining populations is decreased reproductive success during spring migration. The eastern monarch population’s first annual generation occurs in the early spring when...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Sandra J. DeBano Abstract In recent years, monarch butterfly (Danaus plexippus

Impacts of Range Management Decisions on Native Pollinators: Innovative Grazing Practices and Riparian Restoration

Creator:: Mitchell, Scott R.
Abstract:: Animal pollination is critical to plant reproduction in agricultural and wildland ecosystems. Much of the production of seeds and fruits in natural areas, which underlie many food webs, depends on pollination services by insects. The taxon responsible for delivering the bulk of these services in most temperate systems is bees....
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Sandra J. DeBano Abstract Animal pollination is critical to plant reproduction in

Butterfly and flower community composition among prairie-oak ecosystem habitats in the Willamette Valley, Oregon

Creator:: Powers, Breanna F.
Abstract:: Prairie-oak ecosystems in the Willamette Valley, Oregon have experienced habitat loss and degradation; most of these ecosystems are fragmented into smaller patches. Prairie-oak butterfly species, in the Willamette Valley, have decreased dramatically due to loss or degradation of habitat. More research is needed on sustaining the populations of butterflies in...
Resource Type:: Masters Thesis
Full Text:: to my committee members Sandra DeBano and Dave Hibbs for their expertise and input. My gratitude

The Impacts of Juniper Removal on Native Herbaceous Vegetation and Surface-Dwelling Invertebrates in the Sagebrush Steppe

Creator:: Haab, Kimberly A.
Abstract:: Understanding the effects of disturbance and restoration on a species’ habitat is essential for understanding the demographic rates and population trends observed in a species. Sufficient habitat provides the space and resources required for survival and successful reproduction, such as food availability, access to water, protection from predators, protection from...
Resource Type:: Masters Thesis

Post-hatching survival and productivity of American avocets at drainwater evaporation ponds in the Tulare Basin, California

Creator:: Marn, Carolyn M. (Carolyn Mary), 1962-
Abstract:: Evaporation ponds that dispose of agricultural drainwater provide attractive habitat for waterbirds but may result in contaminant exposure that impairs reproduction. I estimated post-hatching survival and evaluated productivity estimates for American avocets (Recurvirostra americana) nesting at evaporation ponds in the Tulare Basin, California from 1991 to 1993. Avocets and Black-necked...
Resource Type:: Dissertation
Full Text:: Leonard, Steve Detweiler, Breiman Cain, Elaine Sproul, Peter Cross, Julie Dickensheets, Rosemary Frank

The effects of patch size and isolation on juvenile emigration in gray-tailed voles, Microtus canicaudus

Creator:: Nelson, Natasha
Resource Type:: Masters Thesis
Full Text:: run smoothly, including: Renee Davis-Born, Tom Manning, Derek Lehman, Palmer Coe, Sandra Fife, Heidi

Direct and indirect effects of livestock grazing intensity on processes regulating grassland bird populations

Creator:: Johnson, Tracey N.
Abstract:: In grasslands, grazing by large ungulates can influence vegetation structure, composition, primary productivity, and ultimately, ecosystem functioning. While grazing represents a complex disturbance, grazing intensity largely determines the effects of grazing on vegetation. Structural and compositional changes in the plant community caused by grazing could have bottom-up effects on species...
Resource Type:: Dissertation
Full Text:: logistical support: Dr. Rob Taylor, Liza Jane Nichols, Jeff Fields, and Phil Shepherd. I thank Dr. Sandra

Conservation and spatial use analyses for the recovery of bighorn sheep in the Peninsular Ranges

Creator:: Ostermann, Stacey D.
Abstract:: The status of wild sheep in North America typifies the plight of many wildlife species in modern times: wild sheep have declined to 10-40% of their numbers during pristine times and on a global scale approximately 31% of Caprine are considered threatened or critical. As human populations and the number...
Resource Type:: Masters Thesis
Full Text:: Hoffman, and especially Elaine Barrett and Joan Scott all contributed greatly to many aspects of my

Validating songbird habitat relationship models

Creator:: Wilson, Dorothy G.
Abstract:: Models are commonly used to assess and predict wildlife response to management practices. Model validation is essential if managers are to use them with confidence. Fifteen forest bird-habitat relationship models were developed by biologists using data collected from private forestland in southwest Washington. These models predict species' probability of occurring...
Resource Type:: Masters Thesis
Full Text:: , and Elaine Wells for without whose strength and determination this project would not have been

Vocalization Patterns of Captive Francois ́ Langurs (Presbytis francoisi)

Creator:: Krishnamurthy, Ramesh S. (Ramesh Saligrama), 1964-
Abstract:: Vocalization patterns of two groups of captive Francois' langurs (Presbytis francoisi) were studied between August 1989 and June 1990. During the 11 months of observation, 109 hours of vocalization recordings were made at Metro Washington Park Zoo, Portland, and the San Diego Zoo, San Diego. Based on the behavioral observations...
Resource Type:: Masters Thesis
Full Text:: . Elaine Chu and Mr. Jim Maxwell, and other primate keepers of the San Diego Zoo, San Diego. My sincere

ScholarsArchive@OSU

Assessing the Impacts of the Red Imported Fire Ant on First-Generation Monarch Butterfly Reproductive Success in a Texas Coastal Prairie

Impacts of Range Management Decisions on Native Pollinators: Innovative Grazing Practices and Riparian Restoration

Butterfly and flower community composition among prairie-oak ecosystem habitats in the Willamette Valley, Oregon

The Impacts of Juniper Removal on Native Herbaceous Vegetation and Surface-Dwelling Invertebrates in the Sagebrush Steppe

Post-hatching survival and productivity of American avocets at drainwater evaporation ponds in the Tulare Basin, California

The effects of patch size and isolation on juvenile emigration in gray-tailed voles, Microtus canicaudus

Direct and indirect effects of livestock grazing intensity on processes regulating grassland bird populations

Conservation and spatial use analyses for the recovery of bighorn sheep in the Peninsular Ranges

Validating songbird habitat relationship models

Vocalization Patterns of Captive Francois ́ Langurs (Presbytis francoisi)

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