Figure 1.

Sampling sites within the Hanford Integrated Field-Scale Research Challenge field site, located ∼250 m from the Columbia River in the Hanford Site 300 area. Gray circles show two-dimensional distribution of sampling locations; the maximum horizontal distance between any two communities is ∼53 m. The two geological formations (Hanford and Ringold) are shown with horizontal and vertical dashes, respectively. Our formation-specific analyses examine communities across the specific vertical ranges shown, whereas the ‘full-system' analyses include additional communities in the middle section of the Hanford.