Index Catalog // ScholarsArchive@OSU

The phytoplankton and limnological characteristics of Lago Rupanco, Osorno, Chile

Creator:: Donoso, Teresa G.
Abstract:: Lago Rupanco is located in the central plain of Chile (Borgel, 1964) at 40° 50' S; 72° 30' W. It lies at 117 m above sea level, and corresponds to type 28c of Hutchinson's (1967) classification. Lago Rupanco is a warm, monomictic lake, with winter circulation and summer stratification. Physical,...
Resource Type:: Masters Thesis
Full Text:: biovolume of the (A and B) Chlorophyceae. (C) Staurastrum tetracerum (D) Botryococcus braunii. 29

The effects of copper on predator-prey interactions of fathead minnows (Pimephales promelas) and Daphnia pulex

Creator:: Rohm, Christina M.
Abstract:: Total copper concentrations of 10 [mu]g/l to 100 [mu]g/l appeared to alter the predator-prey interactions of fathead minnows (Pimephales promelas) and Daphnia pulex. The effect of copper concentration on the total amounts of D. pulex consumed over a 12-h period varied with the density of prey stocked hourly in the...
Resource Type:: Masters Thesis

Lipid content and fatty acid composition of aquatic insects : dietary influence and aquatic adaptation

Creator:: Hanson, Boyd Jay
Resource Type:: Dissertation

Structure, abundance, and distribution of pelagic zooplankton in a deep, oligotrophic Caldera Lake

Creator:: Karnaugh, Elena N.
Abstract:: From July 1985 to April 1987 the pelagic zooplankton community of Crater Lake, Oregon was studied to determine taxonomic structure, absolute and relative densities, and spatial and temporal distributional patterns. Samples were collected using vertically-towed zooplankton nets. The community structure consisted of two cladoceran and nine rotifer species, which were...
Resource Type:: Masters Thesis
Full Text:: the inner (a,c) and outer (b,d) flowmeters during calm (a,b) and rough (c,d) lake conditions. Calm

Patterns in coastal marsh vegetation of the Juneau area, Alaska

Creator:: Stone, Catherine S.
Abstract:: A vegetation study was made of four coastal marshes near Juneau, Alaska. Results confirmed earlier studies' findings in southeast Alaska that communities or assemblages of species can be identified but from marsh to marsh these assemblages appear to have no consistent relationship to each other or to environmental "factors" such...
Resource Type:: Dissertation
Full Text:: . Harry K. Phinney, Professor of Botany; Dr. C. D. McIntire, Professor of Botany; and Dr. Arnold Appleby

Population dynamics and reproductive ecology of the redtail surfperch Amphistichus rhodoterus (Embiotocidae)

Creator:: Brookins, Karl
Resource Type:: Dissertation

Comparative studies of the population ecology and life history patterns of an alkaline salt lake insect : Ephydra (Hydropyrus) hians Say (Diptera:Ephydridae)

Creator:: Herbst, David B.
Abstract:: Seasonal abundance and life history traits were compared between populations of the brine fly Ephydra (Hydrokyrus) hians Say (Diptera:Ephydridae), from two western Great Basin alkaline salt lakes. Abert Lake, Oregon, has a relatively low salinity (20-30 g/1 total dissolved solids) and more co-inhabitant benthic species than the higher salinity Mono...
Resource Type:: Dissertation
Full Text:: Privacy ProfesttiAf Ep-Comology in charge of major Redacted for Privacy Chairman of Department c/Zoology

Effects of temperature and other abiotic and biotic factors on development and survival of the immature stages of the alfalfa leafcutting bee, Megachile pacifica (Panzer) (=rotundata (F.)) (Hymenoptera:Megachilidae)

Creator:: Undurraga O., Jaime M.
Abstract:: Larval mortality of leafcutting bee, Megachile pacifica (Panzer) (= rotundata (F.)), is high, usually exceeding 50%. Parasites and predators are not a limiting factor in the survival of the progeny. The disease chalk brood has been an important mortality factor since 1974. Inadequate food supply, pollen and nectar, may affect...
Resource Type:: Dissertation
Full Text:: a great influence on survival. Temperatures exceeding 50°C occur in cells when nesting material

Relationships of green-tree retention following timber harvest to forest growth and species composition in the western Cascade Mountains

Creator:: Rose, Coulter R.
Abstract:: National Forest management in the Pacific Northwest is shifting from a focus on commodity production to ecosystem management, in which the health of the entire forest ecosystem is considered, rather than that of a few key species. Ecosystem management includes retention of some live trees following timber harvest (green-tree retention)...
Resource Type:: Masters Thesis
Full Text:: contributions to me and to this thesis. My thanks to my committee members: Bruce McCune, C. David McIntire, and

Assemblages of groundfish caught using commercial fishing strategies off the coasts of Oregon and Washington from 1985-1987

Creator:: Rogers, Jean Beyer
Abstract:: The groundfish trawl fishery operating off the coasts of Oregon and Washington 1985-1987 caught six major assemblages of species which could be treated as units in developing mixed-species management plans. Eighty-one percent of the tows observed on commercial vessels were consistently placed in one of the assemblage designations using three...
Resource Type:: Dissertation
Full Text:: . David C. McIntire, and Dr. William J. Liss, members of my doctoral committee, for their guidance and

ScholarsArchive@OSU

The phytoplankton and limnological characteristics of Lago Rupanco, Osorno, Chile

The effects of copper on predator-prey interactions of fathead minnows (Pimephales promelas) and Daphnia pulex

Lipid content and fatty acid composition of aquatic insects : dietary influence and aquatic adaptation

Structure, abundance, and distribution of pelagic zooplankton in a deep, oligotrophic Caldera Lake

Patterns in coastal marsh vegetation of the Juneau area, Alaska

Population dynamics and reproductive ecology of the redtail surfperch Amphistichus rhodoterus (Embiotocidae)

Comparative studies of the population ecology and life history patterns of an alkaline salt lake insect : Ephydra (Hydropyrus) hians Say (Diptera:Ephydridae)

Effects of temperature and other abiotic and biotic factors on development and survival of the immature stages of the alfalfa leafcutting bee, Megachile pacifica (Panzer) (=rotundata (F.)) (Hymenoptera:Megachilidae)

Relationships of green-tree retention following timber harvest to forest growth and species composition in the western Cascade Mountains

Assemblages of groundfish caught using commercial fishing strategies off the coasts of Oregon and Washington from 1985-1987

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