A progress report on insect emergence at Findley Lake during 1972 Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/8910jv87s

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  • The preliminary results of a study of the insect emergence at Findley Lake in the Cascade Mountains of Washington during 1972 are presented. Bottom samples were taken from different regions of the lake to compare the insect emergence at the surface, the physical conditions of the bottom, and the biological communities within the bottom sediments. Those insects that have both an aquatic larval stage and an adult flying stage in their life cycles were collected when they emerged from the lake by ten floating and ten shore-emergence traps. The insects were identified to family, then counted, dried, weighed, and the total biomass that emerged was determined. Graphs were constructed showing the biomass that emerged per day for those orders and families that contributed more than one percent of the total biomass. The dominant insects were Trichoptera (Limnephilidae), Diptera (Tendipedidae and the culicid genus Chaoborus), and Ephemeroptera (Baetidae). There were two main periods of emergence, one consisting mainly of Diptera a few days after the ice melted off the lake in early July, and another consisting mainly of Trichoptera in late August and early September. The greatest insect emergence was near the inlet streams that provided undecomposed plant material to the lake.
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  • 805381 bytes
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  • Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 3.1 was used for pdf compression and textual OCR.
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  • description.provenance : Made available in DSpace on 2008-01-29T19:10:40Z (GMT). No. of bitstreams: 1 Internal Report_71.pdf: 805381 bytes, checksum: 9b6165e2e5d852ba00377812942eae09 (MD5) Previous issue date: 1972
  • description.provenance : Submitted by Adam Powell (apscanner@gmail.com) on 2008-01-24T22:56:59Z No. of bitstreams: 1 Internal Report_71.pdf: 805381 bytes, checksum: 9b6165e2e5d852ba00377812942eae09 (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2008-01-29T19:10:40Z (GMT) No. of bitstreams: 1 Internal Report_71.pdf: 805381 bytes, checksum: 9b6165e2e5d852ba00377812942eae09 (MD5)

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