Anderson, N. H.; Wisseman, R. W.; Courtney, G. W. 1984. Emergence trap collections of lotic Trichoptera in the Cascade Range of Oregon, U.S.A. In: Morse, J. C., ed. Proceedings, 4th international symposium on Trichoptera; Entomology Series, Vol. 30. The Hague: Dr. W. Junk, Publishers: 13-19.
Emergence of caddisflies in three 3rd-order streams was monitored in 1982-83
using four traps, (each 3.34 m2) per stream. Traps were placed over bothriffle and depositional areas. A range of habitats was sampled because sitesextended from 490 to 880 m in elevation and included areas with old-growthconiferous canopy, regrowth deciduous canopy and clearcut with no canopy.
Although trapping efforts censused only limited reaches within each streamsystem, 65% of all caddis species known from the drainage were obtained.
More than 5200 specimens were collected. Rhyacophilidae (23 species) andLimnephilidae (14 species) were the most diverse families, but Lepidostomatidaeaccounted for 46% of the individuals, followed by Philopotamidae (14%), andRhyacophilidae (13%). When 'partitioned into functional feeding groups,
scrapers were the most diverse group; whereas collectors were poorlyrepresented.