“…Previous studies of archaeological fauna and flora from the Andes have documented the range of carbon isotope data for some flora and fauna, particularly maize, tubers, and camelids (Berryman 2010;Burger and Van der Merwe 1990;DeNiro 1988;DeNiro and Hastorf 1985;Finucane, Maita Agurto, and Hastorf and DeNiro 1985;Izeta 2005;Mengoni Gonalons 2007;Miller 2005;Miller, Capriles, and Hastorf 2010;Szpak et al 2013;Thornton et al 2011;Verano and DeNiro 1993). Most Andean domesticated plants such as tubers, including potatoes, and quinoa have δ 13 C values reflecting C 3 plant physiology, showing more negative values ranging from −27 to −18 ‰, while one critical Andean crop, maize, is a C 4 grass that has much more positive δ 13 C values, around −13 to −10 ‰ (Miller 2005;Szpak et al 2013).…”