INSECT EMERGENCE FROM A SHALLOW POND IN A WET MEADOW IN THE CONIFEROUS FOREST OF THE CASCADE MOUNTAINS
Insects were collected in five floating and five shore emergence traps on a two meters deep fishless pond that was surrounded by wet meadows in the coniferous forest of the Cascade Mountains. The pond had an area of 0.65 hectares. The emergence did not start until the entire pond was ice-free. The 1584.4 insects that emerged per square meter per year in the floating traps in 1972 after a thaw on 7 July included 1383.4 of a tiny Tanytarsus species (Diptera: Chironomidae) and 201.0 other insects. The 311.4 milligrams dry weight of insects that emerged per square meter per year in the floating traps in 1972 included 111.9 milligrams of the detritivore-omnivore Clistoronia magnifica (Trichoptera: Limnephilidae), 103.5 milligrams of the detritivore Limnephilus santanus (Limnephilidae), 2.2 milligrams of the late-emerging detritivore Halesochila taylori (Limnephilidae), 48.4 milligrams of the tiny Tanytarsus species, 0.4 milligrams Chaoborus (Diptera: Chaoboridae) and 45.0 milligrams other insects. The 293.8 milligrams that emerged per square meter per year in the shore traps included 93.4 milligrams Somatochlora albicincta (Odonata: Corduliidae), 75.6 milligrams Aeshna palmata (Odonata: Aeshnidae), 39.3 milligrams Limnephilus santanus and 85.5 milligrams other insects.
Truman Sherk (Primary Presenter/Author), retired, email@example.com;