“…Amino acid metabolism within consumers causes predictable enrichment in their 15 N compared to their diets. By quantifying the magnitude of this isotopic discrimination among unique amino acids through compound‐specific isotope analysis (CSIA), ecologists have achieved unprecedented insights into complex food webs (e.g., Batista, Ravelo, Crusius, Casso, & McCarthy, ; Chikaraishi, Kashiyama, Ogawa, Kitazato, & Ohkouchi, ; Choy, Popp, Hannides, & Drazen, ; Dharampal & Findlay, ; Gaebler, Vitti, & Vukmirovich, ; McCarthy, Benner, Lee, & Fogel, ; McClelland & Montoya, ; Naito et al., ; Popp et al., ; Sackett, Drazen, Choy, Popp, & Pitz, ; Sherwood, Iehmann, Schuber, Scott, & McCarthy, ; Steffan, Chikaraishi, Currie, et al., ). Chikaraishi et al.…”