Index Catalog // ScholarsArchive@OSU

Stability and complexity : a reappraisal of the Competitive Exclusion Principle

Creator:: Duran, Israel N.
Abstract:: Elton (1927) realized that, intuitively at least, nature was complex and stable. And that the last property contributed to the first. This idea was challenged mathematically by Gardner and Ashby (1970) and May (1972), and in the years following various models have attempted to reconcile these opposing views. Unlike previous...
Resource Type:: Masters Thesis
Full Text:: was challenged mathematically by Gardner and Ashby (1970) and May (1972), and in the years following

Interspecific predation and cannibalism of immatures by adult female Metaseiulus occidentalis, Typhlodromus pyri (Acari: Phytoseiidae) and Zetzellia mali Schueten (Acari: Stigmaeidae)

Creator:: MacRae, Ian Vance, 1958-
Abstract:: Interspecific predation and cannibalism and associated rates of oviposition were assessed for adult female Metaseiulus occidentalis (Nesbitt) and Typhlodromus pyri Scheuten when provided non-limiting amounts of either eggs, larvae, protonymphs, or deutonymphs. Tests with all four stages of phytoseiids and larvae of Tetranychus urticae Koch were carried out at 25°C....
Resource Type:: Dissertation
Full Text:: suppressed in some plots. During the first year, populations of both phytoseiids were numerous and they

Soil arthropods in the Central Cascades : slash burning effects and biology of some species

Creator:: Estrada-Venegas, Edith G
Abstract:: Despite the recognized role of soil arthropod fauna on nutrient cycling and decomposition processes, many aspects of the effects of sylvicultural methods in forest ecosystems upon their biology remain poorly understood. The long term effects of prescribed fires on soil arthropods in forest ecosystems in the Pacific Northwest have never...
Resource Type:: Masters Thesis
Full Text:: Reserved Soil Arthropods in the Central Cascades: Slash Burning Effects and Biology of Some Species

Insect community composition and physico-chemical processes in summer-dry streams of Western Oregon

Creator:: Dieterich, Martin
Abstract:: Seven streams, one of them permanent, were studied in western Oregon, USA. The research was designed to assess the value of summer-dry headwaters for conservation oriented landscape management. Streams were categorized primarily according to exposure (forest versus meadow sites) and secondarily according to flow duration (ephemeral = short-flow versus temporary...
Resource Type:: Dissertation
Full Text:: and Aldo Leopold come to mind. However, it is only since the early 1980's that conservation biology

The biology and control of the insect vectors of potato viruses in Oregon

Creator:: Crumb, S. E. (Samuel Ebb)
Resource Type:: Dissertation
Full Text:: the growers of England 2,8OO,OOO a year to buy seed in Scotland and Ireland to replace their own

The biology of the predator complex of the filbert aphid, Myzocallis coryli (Goetze), in western Oregon

Creator:: Messing, Russell H.
Abstract:: Commercial filbert orchards throughout the Willamette Valley were surveyed for natural enemies of the filbert aphid, Myzocallis coryli (Goetze). A large number of predaceous insects were found to prey upon M. coryli, particularly members of the families Coccinellidae, Miridae, Chrysopidae, Hemerobiidae, and Syrphidae. Also, a parasitic Hymenopteran (Mesidiopsis sp.) and...
Resource Type:: Masters Thesis
Full Text:: generations per year, including the fundatrix. Summer forms are reported to be very adundant in May and June

Seasonal occurrence and distribution of aquatic insects in Berry Creek

Creator:: Kraft, Gerald Frederick
Resource Type:: Dissertation
Full Text:: velocity and amount of detritus present. These data are to be used in a separate paper on the ecology

Ecology of the predatory mite, Pergamasus quisquiliarum Canestrini (Acari: Mesostigmata)

Creator:: Groth, Eric M.
Abstract:: Pergamasus quisquiliarum Canestini is a polyphagous predatory mite that has been shown to feed on the economically important arthropod, Scutigerella immaculata Newport (Symphyla: Scutigerellidae), Collembola, Diptera larvae, Enchytraeid worms, and miscellaneous other soil organisms. This study examined the feeding behavior of P. quisquiliarum, the effects of cover cropping and tillage...
Resource Type:: Masters Thesis
Full Text:: biology and ecology of P. quisquiliarum in agricultural and non- agricultural sites, and the seasonal

Colonization patterns of stream benthos on artificial substrates in Taiwan

Creator:: Shieh, Sen-her
Abstract:: Experiments on the colonization of artificial substrates by stream benthos were conducted in upper Chingmei Stream, Taiwan. The artificial substrates were colonized by stream benthos for periods of 3, 6 12, 21, 30 and 42 days.The two experiments were designed for different purposes. Experiment I from December 15, 1990 to...
Resource Type:: Masters Thesis
Full Text:: been named and their biology have not been studied. In terms of the geographical position of Taiwan

Environmental biology of Endria inimica (Say) (Homoptera:Homoptera:Cicadellidae)

Creator:: Gustin, Ralph Donald
Abstract:: The leafhopper vector, Endria inimica (Say), of wheat striate mosaic virus is a bivoltine insect which overwinters as second generation eggs in a state of diapause. Under experimental conditions, egg diapause resulted from rearing females under short days (12L:12D) and diapause was averted by rearing females under long days (15L:9D)....
Resource Type:: Dissertation
Full Text:: two generations per year and overwintered in the egg stage. The first generation developed primarily

ScholarsArchive@OSU

Stability and complexity : a reappraisal of the Competitive Exclusion Principle

Interspecific predation and cannibalism of immatures by adult female Metaseiulus occidentalis, Typhlodromus pyri (Acari: Phytoseiidae) and Zetzellia mali Schueten (Acari: Stigmaeidae)

Soil arthropods in the Central Cascades : slash burning effects and biology of some species

Insect community composition and physico-chemical processes in summer-dry streams of Western Oregon

The biology and control of the insect vectors of potato viruses in Oregon

The biology of the predator complex of the filbert aphid, Myzocallis coryli (Goetze), in western Oregon

Seasonal occurrence and distribution of aquatic insects in Berry Creek

Ecology of the predatory mite, Pergamasus quisquiliarum Canestrini (Acari: Mesostigmata)

Colonization patterns of stream benthos on artificial substrates in Taiwan

Environmental biology of Endria inimica (Say) (Homoptera:Homoptera:Cicadellidae)

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search