Figure 1
From: Trophic niches of native and nonnative fishes along a river-reservoir continuum
Fish tissues for isotope analyses were collected over 135 river kilometers (rkm) from three habitats along the lower San Juan River and into Lake Powell in the Colorado River Basin, southeastern Utah, USA. Habitats were delineated in relation to the Piute Farms Waterfall (0 rkm) on the San Juan River and to the San Juan River inflow to Lake Powell. Colored bars represent the extent of sampling in each habitat. Reservoir habitat photograph by Douglas Turnquist, used with permission. River downstream and river upstream photograph by Casey Pennock.
