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Effects of Clearcutting and Riparian Buffers on the Yield of Adult Aquatic Macroinvertebrates from Headwater Streams

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We studied the emergence of Ephemeroptera, Plecoptera and Trichoptera (EPT) from headwater streams in Pacific Northwest conifer forests with emergence traps. We analyzed the effects of silvicultural management (clearcutting and riparian buffering) on insect species assemblages as a measure of the quantity of food resource available to insectivorous predators. Canopy removal increased the biomass and density of total EPTs and all feeding guilds except scrapers. Buffering does not change EPT yield from that of the mature forest (perhaps it decreases it), but the EPT community composition within the buffers becomes similar to that of adjacent clearcuts. Differences in community composition attributed to changes in elevation were more substantial than differences caused by silvicultural management. Forty percent of the species collected were restricted to one or another of the five sites.

Keywords: Ephemeroptera; Plecoptera; Trichoptera; emergence traps; forest canopy

Document Type: Research Article

Publication date: 2007-04-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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