Craneflies of the genus Lipsothrix inhabit decomposing wood in
streams. The life cycles and ecological relationships of L. nigrilinea
(Doane) and L. fenderi Alexander were investigated to determine how they
exploit and respond to the wood habitat and their role in degradation of
woody debris in western Oregon. Surveys of...
The eruption of Mt. St. Helens provided the
opportunity to study secondary production of grazing insects in the context of disturbance. Two stream sites were chosen that significantly differed in how their
watersheds were impacted by the eruption. Clearwater Creek was catastrophically disturbed (physical alteration of habitat, loss of riparian...
Comparative ecological studies of Sialis californica Banks and
Sialis rotunda Banks were made in Western Oregon from 1966 to 1968.
Field collections for S. rotunda were made in fish holding pond at the
Oak Creek laboratories, 5 miles west of Corvallis, Benton County,
and for S. californica in enriched sections...
Plecoptera were collected from four sampling stations selected
to represent a range of conditions on Oak Creek, a small woodland
stream originating in the foothills of the Oregon Coast Range. The
elevation of Site I was 700 ft. while the lowest site was located at 225
ft. Monthly benthos samples...
The insect fauna of a small second order intermittent stream
near Corvallis, Benton County, Oregon was studied. The species
composition was determined, attempts were made to monitor migration
to the stream, qualitative and quantitative benthos samples were
taken, emergence was sampled, the dry stream bed was examined
for forms of...
Six species of Ephemeroptera were studied in two sample areas
in Western Oregon: the Metolius River, Jefferson Co., and Oak
Creek, Benton Co. The Metolius River is characterized by low
fluctuations in flow and water temperatures (8-13 C); whereas, Oak
Creek is characterized by large fluctuations in volume of flow...
The role of detritivores in the conversion of allochthonous
leaf material in two small streams in the Cascade Range of Oregon
was studied. Their importance in relation to other consumers was
estimated from emergence and benthic standing crop data.
Ingestion rates and efficiencies of utilization of bigleaf maple
(Acer macrophyllum)...
The purpose of the study was to provide quantitative information on the utilization and processing of leaves and needles by several species of caddisfly larvae.
Field and laboratory studies were conducted on three species of Lepidostoma Rambur (Lepidostomatidae), from Willamette Valley and Cascade Mountain streams, and on Clistoronia magnifica (Banks)...