Effects of Urbanization on Stream Ecosystems in the Willamette River Basin and Surrounding Area, Oregon and Washington

Scientific Investigations Report 2006–5101–D

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5101–D

Figure - refer to figure caption for alternative text description

Figure 16. Relations between urban intensity index (UII) and (A) percentage of algal taxa requiring high levels of dissolved oxygen, and (B) relative density of eutrophic algae, Willamette River basin and surrounding area, Oregon and Washington.

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