作者：Fannin, Luke D.; Seyoum, Chalachew M.; Venkataraman, Vivek V.; Yeakel, Justin D.; Janis, Christine M.; Cerling, Thure E.; Dominy, Nathaniel J.
作者单位：Dartmouth College; Dartmouth College; University of Arizona; University of Calgary; University of California System; University of California Merced; The Santa Fe Institute; Brown University; University of Bristol; Utah System of Higher Education; University of Utah; Dartmouth College
摘要：Dietary shifts and corresponding morphological changes can sometimes evolve in succession, not concurrently-an evolutionary process called behavioral drive. Detecting behavioral drive in the fossil record is challenging because it is difficult to measure behaviors independently from corresponding morphologies. To solve this problem, we focused on a puzzling behavior in the fossil record of some primates: eating graminoid plants. We report carbon and oxygen isotope ratios from fossil cercopithe...
