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    Ecological linkages between headwater streams and riparian and downstream habitats in the eastern Cascade Range, Washington, USA

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    Author
    Green, Elizabeth C.
    Keyword
    Freshwater fishes
    Freshwater habitats
    Stream ecology
    Riparian ecology
    Riparian areas
    Forest management
    Cascade Range
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/12820
    Abstract
    "I examined how headwater streams are ecologically linked with the terrestrial environment and upstream waters. I examined relationships between fish (rainbow and cutthroat trout), invertebrates, and habitat in 15 headwater streams in two ecoregions (wet, dry) and timber harvest scenarios (logged, unlogged) in the Wenatchee River sub-basin in the eastern Cascade Mountain Range, Washington state, USA. Fish biomass, density, and size were not related to ecoregion or to logging history. Invertebrate drift manipulations in 13 streams influenced fish movement (fish moved downstream in sites that were not supplemented with food) and diet (fish consumed less prey when drifting invertebrates were removed), but not fish growth or abundance. This study demonstrated that fish utilize drifting prey originating from upstream fishless waters, and that they are not able to compensate for the loss of this food. Headwater forest management may affect fish populations by altering prey resources where fish are food-limited"--Leaf iv
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2009
    Table of Contents
    1. Habitat correlates of fish biomass in logged and unlogged headwater streams in the Cascade Range -- 2. Prey delivered from fishless headwater streams affect diet of downstream fish -- General conclusions.
    Date
    2009-12
    Type
    Thesis
    Collections
    Theses supervised by AKCFWRU
    Biological Sciences

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