Fig. 1 in A Stable Isotope Investigation into the Feeding Behavior of Brychius Hungerfordi Spangler (Coleoptera: Haliplidae), a Federally Endangered Crawling Water Beetle

Fig. 1. Keeling Plots of carbon (a) and nitrogen (b) signals against the reciprocal of the mass. The y-intercept is the isotopic value of the source dominating the mixture of Cocconeis and Dichotomosiphon and agrees well with the observed isotopic signature of Dichotomosiphon.