Wood debris serves an important substrate for macroinvertebrates in streams. Particle size reduction due to feeding and other activities can be an important role of the fauna in wood degradation. In this study the Ephemeroptera associated with wood were investigated, with the objective of assessing their impact in the degradation...
Rhyacophila is one of the largest genera of caddisflies, containing
about 465 species. Approximately 100 species are found in
North America with 83 occurring in the west, The larvae of 24
western North American species are associated for the first time,
making a total of 38 species for which larvae...
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)...
Ecological and production studies of Prosimulium caudatum Shewell, P. dicum Dyar and Shannon, Simulium arcticum Malloch and S. canadense Hearle (Diptera: Simuliidae) were made in 1971 and 1972 in three streams near Corvallis, Oregon. The purpose of the study was to characterize the biology and population dynamics of larvae, and...
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...