Index Catalog // ScholarsArchive@OSU

The influence of canopy type and seasons on adult aquatic insect emergence and riparian spiders in the Oregon Coast Range

Creator:: Premdas, Sharmila
Abstract:: The objective of my study was to examine differences in riparian tree and shrub composition associated with adult aquatic emergence and implications for terrestrial spiders in these sites. Seasonal abundance and biomass of adult emergent aquatic insects, riparian arthropod abundances and spider densities were compared between conifer- and hardwood-dominated sites...
Resource Type:: Masters Thesis

Seasonal occurrence and abundance of insect pests and natural enemies in the Columbia Basin

Creator:: Klein, Matthew L.
Abstract:: Potato (Solanum tuberosum L.) is the fourth largest food crop in the world following rice (Oryza sativa L.), wheat (Triticum spp.), and maize (Zea mays subs. mays). Potatoes arrived in the United States in the early 1600s and over the following centuries, the crop was subsequently cultivated across the country...
Resource Type:: Masters Thesis
Full Text:: Matthew L. Klein for the degree of Master of Science in Crop Science presented on November 4, 2016

Enhancing the predatory potential of hoverflies on aphids in Oregon broccoli fields with floral resources

Creator:: Ambrosino, Mario D.
Abstract:: Four key aspects of the relationship between predatory hoverflies and the aphid pest Brevicoryne brassicae L. on broccoli were investigated in the Willamette Valley, Oregon USA: 1) the relationship between aphid density and hoverfly oviposition, 2) the larval voracity of key hoverfly species, 3) the preferences of hoverflies and broccoli...
Resource Type:: Dissertation
Full Text:: Brevicoryne brassicae L. on broccoli were investigated in the Willamette Valley, Oregon USA: 1) the

Structuring habitat to conserve ground beetles (Coleoptera: Carabidae) and reduce summer annual weeds in agroecosystems

Creator:: Green, Jessica M.
Abstract:: Weed management in sustainable farming systems often requires the integration of several different pest management techniques. Cultural, biological, and chemical pest control efforts can be utilized to contribute to the common goal of reducing weeds in vegetable row crop systems. This research addresses how common disturbances such as tillage and...
Resource Type:: Masters Thesis
Full Text:: soil is >300 days (Fecko 1999). Bifenthrin was applied with water at 186 L/ha with a CO2 powered

Grazing, nutrients, and marine benthic algae : insights into the drivers and protection of diversity

Creator:: Guerry, Anne D., 1973-
Abstract:: Two of the most powerful ways in which humans have altered ecosystems are by increasing productivity and changing the densities of important consumers. The bottom-up effects of productivity and the top-down effects of consumers have been identified as primary determinants of biological diversity, though the links between them remain unclear....
Resource Type:: Dissertation
Full Text:: . Although I certainly could have used their expertise more, I thank my committee members, Peter McEvoy

Using stable isotopes and visual gut examination to determine the diet composition of Pterostichus melanarius (Coleoptera: Carabidae) in western Oregon vegetable row crops

Creator:: Moulton, Laurel A.
Abstract:: The omnivorous ground beetle, Pterostichus melanarius Illager (Coleoptera: Carabidae), is a ubiquitous inhabitant of western Oregon crop land. Because it is often the most abundant ground beetle, and attains densities that could lead to serious impacts on its prey sources, I sought to understand the overall diet composition, and specifically...
Resource Type:: Masters Thesis
Full Text:: resources and ideas for my work. Special thanks to Peter McEvoy for his dedication and insight into

An evaluation of factors influencing the management of Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae)

Creator:: Kepler, Ryan M.
Abstract:: The black vine weevil (BVW), Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae) is a persistent pest of nursery operations in the United States, feeding on over 140 species of plants. The goals of this research were to 1) assess the behavioral response of BVW to a commonly employed insecticide bifenthrin (Talstar 0.2G®)...
Resource Type:: Masters Thesis
Full Text:: , Peter McEvoy, Jeff Stone and Dan Arp also greatly benefited the work presented here. The technicians in

Biodiversity : illustrations of some concepts, causes, and consequences

Creator:: Russell, Roland B.
Abstract:: Careful analysis and thoughtful synthesis will be necessary for expanding the envelope of ecological understanding. This work is my attempt at communicating both of these, in relation to three questions about our understanding of the structure and dynamics of biological diversity. These questions focus on a) advancing our understanding of...
Resource Type:: Dissertation
Full Text:: Lubchenco, Peter McEvoy, Bruce Menge, Phil Rossignol, and Dan Schafer; you make a pretty amazing team. Dave

Linking marine communities and ecosystems : invertebrates mediate nutrient availability in intertidal communities

Creator:: Bracken, Matthew E.
Abstract:: While community ecologists have traditionally focused on local-scale processes, it has become apparent that a broader perspective, which explores the community-level ramifications of material fluxes within and between ecosystems, is necessary to effectively evaluate bottom-up influences on community structure and dynamics. In this dissertation, I employed ecosystem principles to understand...
Resource Type:: Dissertation
Full Text:: organic nitrogen, which is unusable by macroalgae, into ammonium, which algae readily assimilate. l

Political economy and trade effects of invasive species regulation : the case of noxious weeds

Creator:: Min, He
Abstract:: Many non-native weed pests of food, fiber, and nursery crops pose threats to U.S. environment and agriculture. Noxious weed regulations play an important role in preventing the introduction and spread of non-native plants, thereby protecting the local biodiversity, environment and economic activities. However, these regulations could also hamper agricultural trade....
Resource Type:: Dissertation
Full Text:: like to thank all my committee members, Dr. Steven T. Buccola, Dr. Peter B. McEvoy, Dr. Jeffrey J

ScholarsArchive@OSU

The influence of canopy type and seasons on adult aquatic insect emergence and riparian spiders in the Oregon Coast Range

Seasonal occurrence and abundance of insect pests and natural enemies in the Columbia Basin

Enhancing the predatory potential of hoverflies on aphids in Oregon broccoli fields with floral resources

Structuring habitat to conserve ground beetles (Coleoptera: Carabidae) and reduce summer annual weeds in agroecosystems

Grazing, nutrients, and marine benthic algae : insights into the drivers and protection of diversity

Using stable isotopes and visual gut examination to determine the diet composition of Pterostichus melanarius (Coleoptera: Carabidae) in western Oregon vegetable row crops

An evaluation of factors influencing the management of Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae)

Biodiversity : illustrations of some concepts, causes, and consequences

Linking marine communities and ecosystems : invertebrates mediate nutrient availability in intertidal communities

Political economy and trade effects of invasive species regulation : the case of noxious weeds

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