Crater Lake, originally barren of fish, was stocked on an
irregular basis from 1888 through 1941 with several species of
salmonids. Two species occur in the lake today--kokanee salmon
(Oncorhynchus nerka) and rainbow trout (Salmo gairdneri). This
study was initiated in the summer of 1986 to evaluate the ecology of...
Disturbance, whether natural or of human origin, modifies to varying degrees
many ecosystem attributes. Fire is a natural process in the montane forests of southern
Oregon but for much of the 20th century fire was viewed as an apocalypse and thus
fervently suppressed. Effective natural resource management requires an
understanding...
Crater Lake National Park presents an excellent opportunity for ecological research due to its relatively pristine landscape, the protection of its natural features, its infrastructure, and a Park administration supportive of scientific inquiry and restoration ecology. The research presented here examines the responses of fungi to various forms of perturbation....
Shortnose Sucker (Chasimistes brevirostris) and Lost River Sucker (Deltistes luxatus) are endemic to the Upper Klamath Basin of Southern Oregon and Northern California. Populations of these fishes have been dwindling since the 1960’s and both species where listed to as endangered in 1988. Poor recruitment is thought to be a...
The purpose of this thesis is to examine the problem of the
increasing competition between recreation and irrigation at Wallowa
Lake. Originally Wallowa Lake was an abundant source of fish for
the Indians but the advent of irrigation in the area by the early settlers eliminated the blueback salmon (oncorhynchus...
An extensive investigation of the physical, chemical and biological characteristics of Sturgeon Lake was conducted during 1980-82. The information gained was used to identify, document, and diagnose water problems at Sturgeon Lake that may affect its uses and particularly its use by waterfowl. The investigation goal was to analyze the...
"The success of Mysis introduced in Kootenay Lake, British Columbia, prompted their introduction in many kokanee lakes in the Western states. Oregon introduced Mysis into eleven waters during the period 1965-67. Several states have conducted intensive studies to evaluate Mysis introductions. Many studies have concluded Mysis have had a negative...