2. Study Areas
We include data from 9 sites in the western United States (6 in Oregon, 2 in Utah, 1 in Colorado; Figure 1, Table 1). Each site includes all three categories of degraded, treatment, and reference floodplain sampling areas, with multiples of each category of reach where possible. We combined data for multiple treated reaches along the same stream where applicable, particularly in Fivemile Bell and Whychus Creek in Oregon and East Canyon Creek in Utah. In all sites except Colorado, floodplain categories are as physically close to each other as possible, typically along the same streams, to reduce variability due to climate and geology. In Colorado, the first iteration of samples was lost in transit; thus, we provide all three categories from different locations within the South Park region of Colorado but acknowledge the limitations of direct comparison between categories.