Identification of linear and threshold responses in streams along a gradient of urbanization in Anchorage, Alaska*

  title={Identification of linear and threshold responses in streams along a gradient of urbanization in Anchorage, Alaska*},
  author={R. T. Ourso and Steven A. Frenzel},
We examined biotic and physiochemical responses in urbanized Anchorage, Alaska, to the percent of impervious area within stream basins, as determined by high-resolution IKONOS satellite imagery and aerial photography. Eighteen of the 86 variables examined, including riparian and instream habitat, macroinvertebrate communities, and water/sediment chemistry, were significantly correlated with percent impervious area. Variables related to channel condition, instream substrate, water chemistry, and… CONTINUE READING
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