Figure 4
From: Trophic niches of native and nonnative fishes along a river-reservoir continuum
Isotope biplots from fish assemblages in the river upstream on the San Juan River, Utah (a), river downstream (b), and in Lake Powell reservoir (c). Ellipses are standard area ellipses corrected for samples size (SEAc; Jackson et al. 2011). Some species present in assemblages differ among panels (i.e., P. lucius and D. cepedianum). Filter-feeding Quagga mussels (Dreissena rostriformis bugensis) were only collected in the reservoir (dot represents the mean and lines are SE).
