Index Catalog // ScholarsArchive@OSU

Disentangling the Biotic and Abiotic Drivers of the Amphibian Disease Chytridiomycosis

Creator:: Bradley, Paul W.
Abstract:: The ongoing worldwide loss of biodiversity has been described as a "biodiversity crisis," "the Anthropocene defaunation," and alternatively "an extinction spasm." More recently, many scientists have come to the conclusion that we are witnesses to Earth's sixth major mass extinction event, which has the potential to fundamentally alter basic ecological...
Resource Type:: Dissertation
Full Text:: the “lag effect” hypothesis, Bd abundance was higher in larval red legged frogs (Rana aurora) that

Effects of body size on the survival and timing of emigration of newly metamorphosed Northern Red-legged frogs

Creator:: Chelgren, Nathan D.
Abstract:: The purpose of this study was to investigate the survival and movements of newly metamorphosed Northern Red-legged frogs (Rana aurora aurora) as they emigrated from two ephemeral breeding ponds. Quantifying survival and movement rates will be important to our understanding how changes to terrestrial and aquatic systems affect behavior and...
Resource Type:: Masters Thesis
Full Text:: Frogs CHAPTER 1 GENERAL INTRODUCTION The Northern Red-legged frog Rana aurora aurora is declining in

Responses of foothill yellow-legged frog (Rana boylii) larvae to an introduced predator

Creator:: Paoletti, David J.
Abstract:: The consequences of species introductions into non-native habitats are a major cause of concern in the U.S. An introduced species may alter native habitats, cause economic damage, compete with natives for resources or prey on them. Of particular interest are the effects of predation by introduced fishes on native amphibians....
Resource Type:: Masters Thesis
Full Text:: ) elicited a defense response from the native northern red-legged frog (Rana aurora), but not from the

Effects of pesticides on amphibians with special reference to the pyrethroidinsecticide, cypermethrin

Creator:: Biga, Lindsay M.
Abstract:: Pollution by pesticides is a ubiquitous concern for wildlife. The effects of pesticides are especially concerning in aquatic environments, which are particularly vulnerable as they have several exposure routes for the influx of chemicals. These effects are of particular concern as biodiversity loss reaches unprecedented rates. This includes recent declines...
Resource Type:: Dissertation
Full Text:: cypermethrin among three developmental stages for three anuran (frog) species (Chapter 3). I experimentally

The Effects of Nitrate and a Pathogenic Fungus, Batrachochytrium dendrobatidis, on Amphibians

Creator:: Negru, Delia
Abstract:: The current rate of global biodiversity loss and extinctions is unparalleled and a major concern. Freshwater organisms are facing particularly rapid rates of biodiversity loss. Amphibians, which require an aquatic environment for part of their life cycle, are one of the most vulnerable vertebrate groups. Amphibians are experiencing population declines,...
Resource Type:: Masters Thesis
Full Text:: disease. Emerging infectious diseases have gained attention due to their increasing prevalence in

Biological influence on red alder on Poria weirii and other root rot pathogens

Creator:: Li, Ching-Yan
Resource Type:: Dissertation
Full Text:: Biological influence on red alder on Poria weirii and

Control and fecundity of root weevils in red raspberry

Creator:: Tanigoshi, Lynell K. and Bergen, Jeanette R.
Resource Type:: Conference Proceeding
Full Text:: WEEVILS IN RED RASPBERRY Lynell K. Tanigoshi and Jeanette R. Bergen Washington State University Vancouver

Seasonal abundance, distribution, and migration of the clover aphid, Nearctaphis bakeri (Cowen) in red clover

Creator:: Dreves, Amy J.
Abstract:: Four sampling techniques were evaluated to estimate clover aphid, Nearctaphis bakeri (Cowen), abundance in red clover fields in the Willamette Valley. The Berlese funnel method detected one to four times more aphids than other sampling techniques. Visual assessment often underestimated the high aphid densities during the flowering and seeding of...
Resource Type:: Masters Thesis
Full Text:: clover aphid, Nearctaphis bakeri (Cowen) in red clover AN ABSTRACT OF THE THESIS OF Amy J. Dreves for

Small broomrape : biology and management in the Pacific Northwest

Creator:: Oregon State University. Extension Service, Lins, Ryan D., and Colquhoun, Jed
Abstract:: Small broomrape (Orobanche minor Sm.) is a parasitic weed that recently has become troublesome in red clover seed production in Oregon. It was identified in a single red clover seed production field in 1998, and the number of infestations increased to 15 by 2000 and 22 by 2001.
Resource Type:: Technical Report
Full Text:: minor Sm.) is a parasitic weed that recently has become trouble- some in red clover seed produc- tion

Managing manganese deficiency in nursery production of red maple

Creator:: Oregon State University. Extension Service and Altland, James Elmer, 1973-
Abstract:: Field-grown red maple (Acerrubrum) trees often develop foliar chlorosis during mid- to late summer. Initially, the condition appears as mild interveinal chlorosis in newly developing foliage. As symptoms intensify, entire leaves turn chlorotic. Under severe conditions, interveinal necrosis occurs. Chlorotic plants often have reduced height and caliper. The chlorosis is...
Resource Type:: Technical Report
Full Text:: Managing Manganese Deficiency in Nursery Production of Red Maple

ScholarsArchive@OSU

Disentangling the Biotic and Abiotic Drivers of the Amphibian Disease Chytridiomycosis

Effects of body size on the survival and timing of emigration of newly metamorphosed Northern Red-legged frogs

Responses of foothill yellow-legged frog (Rana boylii) larvae to an introduced predator

Effects of pesticides on amphibians with special reference to the pyrethroidinsecticide, cypermethrin

The Effects of Nitrate and a Pathogenic Fungus, Batrachochytrium dendrobatidis, on Amphibians

Biological influence on red alder on Poria weirii and other root rot pathogens

Control and fecundity of root weevils in red raspberry

Seasonal abundance, distribution, and migration of the clover aphid, Nearctaphis bakeri (Cowen) in red clover

Small broomrape : biology and management in the Pacific Northwest

Managing manganese deficiency in nursery production of red maple

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