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Effects of streamside riparian forest management on Ephemeroptera and Trichoptera community structure in four western Oregon streams

Creator:: Walsh, Jennifer B. S.
Abstract:: In order to restore conifers in hardwood dominated riparian forests 25% of the experimental reach forests alongside four streams in western Oregon was clearcut. Clearcutting removed 400 m without residual buffers from a 1600-m streamside forest reach in patchcuts spanning 100 and 200 meters. To assess the cumulative and direct...
Resource Type:: Masters Thesis

Effect of adult aquatic insect life history on return to Lookout Creek, H. J. Andrews Experimental Forest, Oregon

Creator:: Farrand, Alexander Mark
Abstract:: Aquatic insects that emerge out of streams to mate represent a potential energy flux to terrestrial food webs. The relative success of an individual aquatic adult insect is whether it survives long enough to produce offspring, i.e. mate and return to the stream to oviposit eggs. Some characteristics of the...
Resource Type:: Masters Thesis

The distribution and biology of the Oregon Trichoptera

Creator:: Anderson, N. H.
Abstract:: More than 280 species of caddisflies (Trichoptera), representing 80 genera in 16 families, are known to occur in Oregon. Detailed distribution records within the state are given, as well as the known geographic range for each species. Biological information, such as life cycle, habitat preference, flight period, and larval feeding...
Resource Type:: Technical Report
Full Text:: A. 15 PEE 1 l(-.",. DBR Y w I I 11 OREGON STATE

Lotic macroinvertebrate distribution patterns in northeastern Oregon

Creator:: Gerth, William J.
Abstract:: This study was an investigation of lotic macroinvertebrate distribution in northeastern Oregon at two different spatial and biological scales. Examination of assemblages at a limited spatial scale revealed relationships with natural and disturbance gradients and led to questions about distribution of a population at broader spatial scales. In a 16...
Resource Type:: Masters Thesis
Full Text:: were examined and related to distribution of this caddisfly in northeastern Oregon at sites ranging

An ecological reconnaissance of the artemisia steppe on the east central Owyee uplands of Oregon

Creator:: Culver, Roger Norman
Abstract:: As the management of range lands is intensified or as improvement activity is increased, a critical need is seen to refine the understanding of the ecology of these lands. If soil surveys on range lands are to be meaningful and useful, the relationship between the fundamental ecological units and the...
Resource Type:: Masters Thesis
Full Text:: the east central Owyhee uplands of Oregon AN ABSTRACT OF THE THESIS OF ROGER NORMAN CULVER for the

The ecological consequences of the reduction of species diversity : experimental approaches

Creator:: Allison, Gary William
Abstract:: The influence of loss of diversity on community dynamics and ecosystem functioning has recently received considerable attention. Although study of biodiversity has a long history within ecology, empirical investigations exploring consequences of loss have been rare. Because many factors confound diversity comparisons, experimental manipulations of diversity offer the most direct...
Resource Type:: Dissertation
Full Text:: ecology, empirical investigations exploring consequences of loss have been rare. Because many factors

Coarse woody debris in streams of the Drift Creek Basin, Oregon

Creator:: Veldhuisen, Curt N.
Abstract:: This study examined the occurrence of coarse woody debris (i.e., pieces greater than 0.15 m in diameter and 2.0 m in length) in first- through fifth-order streams located within the Drift Creek Basin of the Oregon Coast Range. Nine "tributary reaches" were surveyed to determine how three land management treatments...
Resource Type:: Masters Thesis

Livestock, deer and logging interactions in the lodgepole pine/pumice region of central Oregon

Creator:: Stuth, Jerry W.
Abstract:: The objectives of this study were to: 1) determine production of plant species and utilization by cattle, sheep and deer as related to plant communities and timber management practices and 2) evaluate the interaction of range use between cattle and deer and between sheep and deer as affected by site...
Resource Type:: Dissertation
Full Text:: pine-pumice region of central Oregon AN ABSTRACT OF THE THESIS OF Jerry Wayne Stuth for the degree

Correspondence of soil properties and classification units with sagebrush communities in southeastern Oregon

Creator:: Lentz, Rodrick David
Abstract:: This research employed multivariate analytical techniques to statistically examine the relationship between individual soillandscape units (SLUs) in Southeastern Oregon and their associated sagebrush communities. The objective was to determine if soil properties between SLUs differed, describe the variation, and verify that these differences were reflected in the taxonomic class of...
Resource Type:: Masters Thesis
Full Text:: with Sagebrush Communities in Southeastern Oregon AN ABSTRACT OF THE THESIS OF Rodrick D. Lentz for

Effect of western juniper on understory herbage production in Central Oregon

Creator:: Vaitkus, Milda R.
Abstract:: Evidence suggests that western juniper (Juniperus occidentalis) in Central Oregon affects understory production and composition. As trees increase in size and density, understory production is reduced and composition changes. This study was designed to identify the relationship between production and composition of understory vegetation and various tree canopy sizes of...
Resource Type:: Masters Thesis
Full Text:: in Central Oregon AN ABSTRACT OF THE THESIS OF Milda R. Vaitkus for the degree of Master of

ScholarsArchive@OSU

Effects of streamside riparian forest management on Ephemeroptera and Trichoptera community structure in four western Oregon streams

Effect of adult aquatic insect life history on return to Lookout Creek, H. J. Andrews Experimental Forest, Oregon

The distribution and biology of the Oregon Trichoptera

Lotic macroinvertebrate distribution patterns in northeastern Oregon

An ecological reconnaissance of the artemisia steppe on the east central Owyee uplands of Oregon

The ecological consequences of the reduction of species diversity : experimental approaches

Coarse woody debris in streams of the Drift Creek Basin, Oregon

Livestock, deer and logging interactions in the lodgepole pine/pumice region of central Oregon

Correspondence of soil properties and classification units with sagebrush communities in southeastern Oregon

Effect of western juniper on understory herbage production in Central Oregon

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