Habitat quality and biotic integrity in mountain streams of East Maui, Hawaii Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_projects/jd472x248

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  • Hawaiian streams are valued for environmental, cultural, and aesthetic qualities. Windward streams in East Maui, Hawaii are diverted to irrigate crops in central portions of the island. Diversions typically remove 100% of the base flow and leave downstream reaches dry most of the year. Ground water seeps and springs contribute to overall base flow, and the magnitudes of these contributions vary by catchment. This otherwise pristine region provided a natural setting in which lotic ecosystem responses to stream dewatering could be studied. An examination of nine channel reaches in three streams exposed various controls on instream habitat quality and aquatic biological integrity. The Hawaii Stream Bioassessment Protocol (HSBP) was used to compare each study site. Elevation, discharge, riparian conditions, and channel reach morphology influenced independent measures habitat quality and biotic integrity. Mechanistic interpretations of HSBP results were limited by spatial scale. Suggested improvements to the tool include the adoption of multi-scale metrics in order to account for the effects of elevation and channel reach morphology.
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  • File scanned at 300 ppi (Monochrome, 24-bit Color) using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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