Hominin ecology from hard-tissue biogeochemistry

Early Hominin Paleoecology

Volumn , Issue , 2013, Pages 281-324

  Lee Thorp, Julia A ^a   Sponheimer, Matt ^b  

^a UNIVERSITY OF OXFORD   (United Kingdom)

^b UNIVERSITY OF COLORADO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 84928700335     PISSN: None     EISSN: None     Source Type: Book    
DOI: 10.5876/9781607322252:C08     Document Type: Chapter

References (161)

1. Aiello, L. C., and P. Wheeler. 1995. “The Expensive Tissue Hypothesis: The Brain and the Digestive System in Human and Primate Evolution.” Current Anthropology 36 (2): 199-221. http://dx.doi.org/10.1086/204350.
2. Altmann, S. A., and J. Altmann. 1970. Baboon Ecology. Chicago: University of Chicago Press.
3. Ambrose, S. H., and L. Norr. 1993. “Experimental Evidence for the Relationship of the Carbon Isotope Ratios of Whole Diet and Dietary Protein to Those of Bone Collagen and Carbonate.” In Prehistoric Human Bone: Archaeology at the Molecular Level, ed. J. B. Lambert and G. Grupe, 1-37. Berlin: Springer-Verlag.
4. Backwell, L. R., and F. d’Errico. 2001. “Evidence of Termite Foraging by Swartkrans Early Hominids.” Proceedings of the National Academy of Sciences of the United States of America 98 (4): 1358-63. http://dx.doi.org/10.1073/pnas.98.4.1358. Medline:11171955
5. Balasse, M. 2002. “Reconstructing Dietary and Environmental History from Enamel Isotopic Analysis: Time Resolution of Intra-Tooth Sequential Sampling.” International Journal of Osteoarchaeology 12 (3): 155-65. http://dx.doi.org/10.1002/oa.601.
6. Balasse, M., A. B. Smith, S. H. Ambrose, and S. R. Leigh. 2003. “Determining Sheep Birth Seasonality by Analysis of Tooth Enamel Oxygen Isotope Ratios: The Late Stone Age Site of Kasteelberg (South Africa).”Journal of Archaeological Science 30 (2): 205-15. http://dx.doi.org/10.1006/jasc.2002.0833.
7. Balter, V., H. Bocherens, A. Person, N. Labourdette, M. Renard, and B. Vandermeersch. 2002. “Ecological and Physiological Variability of Sr/Ca and Ba/Ca in Mammals of West European Mid-Wurmian Food Webs.” Palaeogeography, Palaeoclimatology, Palaeoecology 186 (1-2): 127-43. http://dx.doi.org/10.1016/S0031-0182(02)00448-0.
8. Bamford, M. K., R. M. Albert, and D. Cabanes. 2006. “Plio-Pleistocene Macroplant Fossil Remains and Phytoliths from Lowermost Bed II in the Eastern Palaeolake Margin of Olduvai Gorge, Tanzania.” Quaternary International 148 (1): 95-112. http://dx.doi.org/10.1016/j.quaint.2005.11.027.
9. Bedaso, Z., J. G. Wynn, Z. Alemseged, and D. Geraads. 2010. “Paleoenvironmental Reconstruction of the Asbole Fauna (Busidima Formation, Afar, Ethiopia) Using Stable Isotopes.” Geobios 43 (2): 165-77. http://dx.doi.org/10.1016/j.geobios.2009.09.008.
10. Behrensmeyer, A. K. 1991. “Terrestrial Vertebrate Accumulations.” In Taphonomy: Releasing the Data Locked in the Fossil Record, ed. P. A. Allison and D.E.G. Briggs, 229-235. New York: Plenum.
11. Boaz, N. T., and J. Hampel. 1978. “Strontium Content of Fossil Tooth Enamel and Diet of Early Hominids.” Journal of Paleontology 52:928-33.
12. Bocherens, H., P. L. Koch, A. Mariotti, D. Geraads, and J J. Jaeger. 1996. “Isotopic Biogeochemistry (13C, 18O) of Mammalian Enamel from African Pleistocene Hominid Sites.” Palaios 11 (4): 306-18. http://dx.doi.org/10.2307/3515241.
13. Bowen, G. J., J. R. Ehleringer, L. A. Chesson, A. H. Thompson, D. W. Podlesak, and T. E. Cerling. 2009. “Dietary and Physiological Controls on the Hydrogen and Oxygen Isotope Ratios of Hair from Mid-20th Century Indigenous Populations.” American Journal of Physical Anthropology 139 (4): 494-504. http://dx.doi.org/10.1002/ajpa.21008. Medline:19235792
14. Bowen, H.J.M., and J.A. Dymond. 1955. “Strontium and Barium in Plants and Soils.” Philosophical Transactions of the Royal Society of London. B 144:355-68.
15. Brain, C. K. 1981. The Hunters or the Hunted? Chicago: University of Chicago Press.
16. Brown, A. B. 1974. “Bone Strontium as a Dietary Indicator in Human Skeletal Populations.” Contributions to Geology (Copenhagen) 13:47-8.
17. Budd, P., J. Montgomery, B. Barreiro, and R. G. Thomas. 2000. “Differential Diagenesis of Strontium in Archeological Human Dental Tissues.”Applied Geochemistry 15 (5): 687-94. http://dx.doi.org/10.1016/S0883-2927(99)00069-4.
18. Burton, J. H., T. D. Price, and W. D. Middleton. 1999. “Correlation of Bone Ba/Ca and Sr/Ca Due to Biological Purification of Calcium.”Journal of Archaeological Science 26 (6): 609-16. http://dx.doi.org/10.1006/jasc.1998.0378.
19. Carter, M. L. (2001). “Sensitivity of Stable Isotopes (13C, 15N, and 18O) in Bone to Dietary Specialization and Niche Separation among Sympatric Primates in Kibale National Park, Uganda.” PhD Dissertation, University of Chicago.
20. Cerling, T. E., and J. M. Harris. 1999. “Carbon Isotope Fractionation between Diet and Bioapatite in Ungulate Mammals and Implications for Ecological and Paleoecological Studies.” Oecologia 120 (3): 347-63. http://dx.doi.org/10.1007/s004420050868.
21. Cerling, T. E., J. M. Harris, S. H. Ambrose, M. G. Leakey, and N. Solounias. 1997. “Dietary and Environmental Reconstruction with Stable Isotope Analyses of Herbivore Tooth Enamel from the Miocene Locality of Fort Ternan, Kenya.” Journal of Human Evolution 33 (6): 635-50. http://dx.doi.org/10.1006/jhev.1997.0151. Medline:9467773
22. Cerling, T. E., N. E. Levin, J. Quade, et al. 2010. “Comment on the Paleoenvironment of Ardipithecus ramidus.”Science 328: 1105-d.
23. Cerling, T. E., E. Mbua, F. M. Kirera, F. K. Manthi, F. E. Grine, M. G. Leakey, M. Sponheimer, and K. T. Uno. 2011. “Diet of Paranthropus boisei in the Early Pleistocene of East Africa.” Proceedings of the National Academy of Sciences of the United States of America 108 (23): 9337-41. http://dx.doi.org/10.1073/pnas.1104627108. Medline:21536914
24. Cheney, D. L., P. C. Lee, and R. M. Seyfarth. 1981. “Behavioral Correlates of Non-Random Mortality among Free-Ranging Female Vervet Monkeys.” Behavioral Ecology and Sociobiology 9 (2): 153-61. http://dx.doi.org/10.1007/BF00293587.
25. Clarke, R. J., and T. C. Partridge. 2002. “On the Unrealistic ‘Revised Age Estimates’ for Sterkfontein.” South African Journal of Science 98:415-9.
26. Codron, D., J. A. Lee-Thorp, M. Sponheimer, D. de Ruiter, and J. Codron. 2006. “Inter-and Intra-Habitat Dietary Variability of Chacma Baboons (Papio ursinus) in South African Savannas Based on Fecal d 13C, d 15N and %N.” American Journal of Physical Anthropology 129 (2): 204-214. http://dx.doi.org/10.1002/ajpa.20253.
27. Codron, D., J. Luyt, J. A. Lee-Thorp, M. Sponheimer, D. de Ruiter, and J. Codron. 2005. “Utilization of Savanna-Based Resources by Plio-Pleistocene Baboons.” South African Journal of Science 101:245-8.
28. Daegling, D. J., W. S. McGraw, P. S. Ungar, J. D. Pampush, A. E. Vick, and E. A. Bitty. 2011. “Hard-Object Feeding in Sooty Mangabeys (Cercocebus atys) and Interpretation of Early Hominin Feeding Ecology.” PLoS ONE 6 (8): e23095. http://dx.doi.org/10.1371/journal.pone.0023095.Medline:21887229.
29. Dansgaard, W. 1964. “Stable Isotopes in Precipitation.” Tellus 16 (4): 436-68. http://dx.doi.org/10.1111/j.2153-3490.1964.tb00181.x.
30. Dart, R. A. 1926. “Taungs and Its Significance.” Natural History 26:315-27.
31. Dart, R. A. 1957. “The Osteodontokeratic Culture of Australopithecus prometheus.” Transvaal Museum Memoir 10:1-105.
32. de Ruiter, D. J., M. Sponheimer, and J. A. Lee-Thorp. 2008. “Indications of Habitat Association of Australopithecus robustus in the Bloubank Valley, South Africa.”Journal of Human Evolution 55 (6): 1015-30. http://dx.doi.org/10.1016/j.jhevol.2008.06.003. Medline:18824254
33. Dunbar, R.I.M. 1983. “Theropithecines and Hominids: Contrasting Solutions to the Same Ecological Problem.” Journal of Human Evolution 12 (7): 647-58. http://dx.doi.org/10.1016/S0047-2484(83)80004-9.
34. Elias, R. W., Y. Hirao, and C. C. Patterson. 1982. “The Circumvention of the Natural Biopurification of Calcium along Nutrient Pathways by Atmospheric Inputs of Industrial Lead.” Geochimica et Cosmochimica Acta 46 (12): 2561-80. http://dx.doi.org/10.1016/0016-7037(82)90378-7.
35. Elliott, J. C. 1994. Structure and Chemistry of the Apatites and Other Calcium Orthophosphates. Amsterdam: Elsevier.
36. Ezzo, J. A. 1994. “Putting the Chemistry Back into Archaeological Bone Chemistry Analysis: Modeling Potential Paleodietary Indicators.” Journal of Anthropological Archaeology 13: 1-34.
37. Fara, E., A. Likius, H. T. Mackaye, P. Vignaud, and M. Brunet. 2005. “Pliocene Large-Mammal Assemblages from Northern Chad: Sampling and Ecological Structure.” Naturwissenschaften 92 (11): 537-41 http://dx.doi.org/10.1007/s00114-005-0041-6. Medline:16220286.
38. Farquhar, G. D., M. H. O’Leary, and J. A. Berry. 1982. “The Relation between Carbon Isotope Discrimination and the Intercellular Carbon Dioxide Concentration in Leaves.” Australian Journal of Plant Physiology 9 (2): 121-38. http://dx.doi.org/10.1071/PP9820121.
39. Feibel, C. 1997. “Debating the Environmental Factors in Hominid Evolution.” GSA Today 7 (3): 1-7.
40. Fleagle, J. G. 1999. Primate Adaptation and Evolution. 2nd ed. New York: Academic Press.
41. Gilbert, C., J. Sealy, and A. Sillen. 1994. “An Investigation of Barium, Calcium and Strontium as Paleodietary Indicators in the Southwestern Cape, South Africa.” Journal of Archaeological Science 21 (2): 173-84. http://dx.doi.org/10.1006/jasc.1994.1020.
42. Goodall, J. 1986. The Chimpanzees of Gombe. Cambridge: Cambridge University Press.
43. Gould, L., R. W. Sussman, and M. L. Sauther. 1999. “Natural Disasters and Primate Populations: The Effects of a 2-Year Drought on a Naturally Occurring Population of Ring-Tailed Lemurs (Lemur catta) in Southwestern Madagascar.” International Journal of Primatology 20 (1): 69-84. http://dx.doi.org/10.1023/A:1020584200807.
44. Grine, F. E. 1981. “Trophic Differences between Gracile and Robust Australopithecines.” South African Journal of Science 77:203-30.
45. Grine, F. E. 1986. “Dental Evidence for Dietary Differences in Australopithecus and Paranthropus: A Quantitative Analysis of Permanent Molar Microwear.” Journal of Human Evolution 15 (8): 783-822. http://dx.doi.org/10.1016/S0047-2484(86)80010-0.
46. Grine, F. E., and R. F. Kay. 1988. “Early Hominid Diets from Quantitative Image Analysis of Dental Microwear.” Nature 333 (6175): 765-8. http://dx.doi.org/10.1038/333765a0. Medline:3133564
47. Grine, F. E., P. S. Ungar, and M. F. Teaford. 2006a. “Was the Early Pliocene Hominin 'Australopithecus’ anamensis a Hard Object Feeder?” South African Journal of Science102:301-10.
48. Grine, F. E., P. S. Ungar, M. F. Teaford, and S. El Zaatari. 2006b. “Molar Microwear in Praeanthropus afarensis: Evidence for Dietary Stasis through Time and under Diverse Paleoecological Conditions.” Journal of Human Evolution 51 (3): 297-319. http://dx.doi.org/10.1016/j.jhevol.2006.04.004.Medline:16750841
49. Haghiri, F. 1964. “Strontium-90 Accumulation in Some Vegetable Crops.” Ohio Journal of Science 64:371-5.
50. Harding, R.S.O. 1976. “Ranging Patterns of a Troop of Baboons (Papio anubis) in Kenya.” Folia Primatologica 25 (2-3): 143-85. http://dx.doi.org/10.1159/000155711. Medline:817989
51. Hatley, T., and J. Kappelman. 1980. “Bears, Pigs, and Plio-Pleistocene Hominids: Case for Exploitation of Belowground Food Resources.” Human Ecology 8 (4): 371-87. http://dx.doi.org/10.1007/BF01561000.
52. Henry, A.G., P. S. Ungar, B. H. Passey, M. Sponheimer, L. Rossouw, M. Bamford, P. Sandberg, D. de Ruiter, and L. Berger. 2012. “The Diet of Australopithecus sediba.” Nature487: 90-93. http://dx.doi.org/10.1038/nature11185.
53. Hesla, A.B.I., L. L. Tieszen, and S. K. Imbamba. 1982. “A Systematic Survey of C3 and C4 Photosynthesis in the Cyperaceae of Kenya, East Africa.” Photosynthetica 16:196-205.
54. Hopley, P. J., A. G. Latham, and J. D. Marshall. 2006. “Palaeoenvironments and Palaeodiets of Mid-Pliocene Micromammals from Makapansgat Limeworks, South Africa: A Stable Isotope and Dental Microwear Approach.” Palaeogeography, Palaeoclimatology, Palaeoecology 233 (3-4): 235-51 http://dx.doi.org/10.1016/j.palaeo.2005.09.011.
55. Hopley, P. J., and M. Maslin. 2010. “Climate-Averaging of Terrestrial Faunas: An Example from the Plio-Pleistocene of South Africa.” Paleobiology 36 (1): 32-50. http://dx.doi.org/10.1666/0094-8373-36.1.32.
56. Hoppe, K. A., P. L. Koch, and T. T. Furutani. 2003. “Assessing the Preservation of Biogenic Strontium in Fossil Bones and Tooth Enamel.” International Journal of Osteoarchaeology13 (1-2): 20-8. http://dx.doi.org/10.1002/oa.663.
57. Hylander, W. L. 1975. “Incisor Size and Diet in Anthropoids with Special Reference to Cercopithecidae.” Science 189 (4208): 1095-8. http://dx.doi.org/10.1126/science.808855. Medline:8o8855
58. Iwamoto, T. 1993. “The Ecology of Theropithecus gelada.” In Theropithecus: The Rise and Fall of a Primate Genus, ed. N. G. Jablonski, 441-452. Cambridge: Cambridge University Press.
59. Jolly, C. J. 1970. “The Seed-Eaters: A New Model of Hominid Differentiation Based on a Baboon Analogy.” Man 5 (1): 5-26. http://dx.doi.org/10.2307/2798801.
60. Jones, A. M., T. C. O’Connell, E. D. Young, K. Scott, C. M. Buckingham, P. Iacumin, and M. D. Brasier. 2001. “Biogeochemical Data from Well Preserved 200 ka Collagen and Skeletal Remains.” Earth and Planetary Science Letters 193 (1-2): 143-9. http://dx.doi.org/10.1016/S0012-821X(01)00474-5.
61. Kay, R. 1985. “Dental Evidence for the Diet of Australopithecus.” Annual Review of Anthropology 14 (1): 315-41. http://dx.doi.org/10.1146/annurev.an.14.100185.001531.
62. Kingston, J. D. 2011. “Stable Isotopic Analyses of Laetoli Fossil Herbivores.” In Paleontology and Geology of Laetoli: Human Evolution in Context, vol. 1., ed. T. Harrison, 293-328. Dordrecht: Springer. http://dx.doi.org/10.1007/978-90-481-9956-3_15
63. Kingston, J. D., and T. Harrison. 2007. “Isotopic Dietary Reconstructions of Pliocene Herbivores at Laetoli: Implications for Early Hominin Paleoecology.” Palaeogeography, Palaeoclimatology, Palaeoecology 243 (3-4): 272-306. http://dx.doi.org/10.1016/j.palaeo.2006.08.002.
64. Kohn, M. J., M. J. Schoeninger, and J. W. Valley. 1996. “Herbivore Tooth Oxygen Isotope Compositions: Effects of Diet and Physiology.” Geochimica et Cosmochimica Acta 60 (20): 3889-96. http://dx.doi.org/10.1016/0016-7037(96)00248-7.
65. Krueger, H. W., and C. H. Sullivan. 1984. “Models for Carbon Isotope Fractionation between Diet and Bone.” In Stable Isotopes in Nutrition, ed. J. F. Turnlund and P. E. Johnson, 205-222. ACS Symposium Series 258. Washington, DC: American Chemical Society.
66. Kuman, K., and R. J. Clarke. 2000. “Stratigraphy, Artefact Industries and Hominid Associations for Sterkfontein, Member 5.” Journal of Human Evolution 38 (6): 827-47. http://dx.doi.org/10.1006/jhev.1999.0392. Medline:10835264
67. Laden, G., and R. W. Wrangham. 2005. “The Rise of the Hominids as an Adaptive Shift in Fallback Foods: Plant Underground Storage Organs (USOs) and Australopith Origins.” Journal of Human Evolution 49 (4): 482-98. http://dx.doi.org/10.1016/j.jhevol.2005.05.007. Medline:16085279
68. Lambert, J. E., C. A. Chapman, R. W. Wrangham, and N. L. Conklin-Brittain. 2004. “Hardness of Cercopithecine Foods: Implications for the Critical Function of Enamel Thickness in Exploiting Fallback Foods.” American Journal of Physical Anthropology 125 (4): 363-8. http://dx.doi.org/10.1002/ajpa.10403. Medline:15386250
69. Lee-Thorp, J. A. 1989. “Stable Carbon Isotopes in Deep Time: The Diets of Fossil Fauna and Hominids.” Ph.D. Dissertation. University of Cape Town.
70. Lee-Thorp, J. A. 2000. “Preservation of Biogenic Carbon Isotope Signals in Plio-Pleistocene Bone and Tooth Mineral.” In Biogeochemical Approaches to Paleodietary Analysis, ed. S. Ambrose and K. A. Katzenberg, 89-115. New York: Plenum Press. http://dx.doi.org/10.1007/0-306-47194-9_5
71. Lee-Thorp, J., A. Likius, T. H. Mackaye, P. Vignaud, M. Sponheimer, M. Brunet. 2012. “Isotopic evidence for an early shift to C4 resources by Pliocene hominins in Chad.” Proceedings of the National Academy of Science USA 109, 20369-20372.
72. Lee-Thorp, J. A., J. C. Sealy, and N. J. van der Merwe. 1989. “Stable Carbon Isotope Ratio Differences between Bone Collagen and Bone Apatite, and Their Relationship to Diet.” Journal of Archaeological Science 16 (6): 585-99. http://dx.doi.org/10.1016/0305-4403(89)90024-1.
73. Lee-Thorp, J. A., and M. Sponheimer. 2003. “Three Case Studies Used to Reassess the Reliability of Fossil Bone and Enamel Isotope Signals for Paleodietary Studies.” Journal of Anthropological Archaeology 22 (3): 208-16. http://dx.doi.org/10.1016/S0278-4165(03)00035-7.
74. Lee-Thorp, J. A., and M. Sponheimer. 2005. “Opportunities and Constraints for Reconstructing Palaeoenvironments from Stable Light Isotope Ratios in Fossils.” Geological Quarterly 49:195-203.
75. Lee-Thorp, J. A., and M. Sponheimer. 2006. “Biogeochemical Approaches to Investigating Hominin Diets.” Yearbook of Physical Anthropology 49:131-48.
76. Lee-Thorp, J. A., M. Sponheimer, and J. C. Luyt. 2007. “Tracking Changing Environments Using Stable Carbon Isotopes in Fossil Tooth Enamel: An Example from the South African Hominin Sites.” Journal of Human Evolution 53 (5): 595-601. http://dx.doi.org/1o.1o16/j.jhevol.20o6.11.020. Medline:17920103
77. Lee-Thorp, J. A., M. Sponheimer, B. H. Passey, D. J. de Ruiter, and T. E. Cerling. 2010. “Stable Isotopes in Fossil Hominin Tooth Enamel Suggest a Fundamental Dietary Shift in the Pliocene.” Philosophical Transactions of the Royal Society of London. Series B 365 (1556): 3389-96. http://dx.doi.org/10.1098/rstb.2010.0059. Medline:2o855312
78. Lee-Thorp, J. A., M. Sponheimer, and N. J. van der Merwe. 2003. “What Do Stable Isotopes Tell Us about Hominid Dietary and Ecological Niches in the Pliocene?” International Journal of Osteoarchaeology 13:104-13. http://dx.doi.org/10.1002/oa.659.
79. Lee-Thorp, J. A., J. F. Thackeray, and N. J. van der Merwe. 2000. “The Hunters and the Hunted Revisited.” Journal of Human Evolution 39 (6): 565-76. http://dx.doi.org/10.1006/jhev.2000.0436. Medline:11102267
80. Lee-Thorp, J. A., and N. J. van der Merwe. 1987. “Carbon Isotope Analysis of Fossil Bone Apatite.” South African Journal of Science 83:712-5.
81. Lee-Thorp, J. A., N. J. van der Merwe, and C. K. Brain. 1994. “Diet of Australopithecus robustus at Swartkrans from Stable Carbon Isotopic Analysis.” Journal of Human Evolution 27 (4): 361-72. http://dx.doi.org/10.1006/jhev.1994.1050.
82. LeGeros, R. Z. 1991. Calcium Phosphates in Oral Biology and Medicine. Paris: Karger.
83. Levin, N. E., T. E. Cerling, B. H. Passey, J. M. Harris, and J. R. Ehleringer. 2006. “A Stable Isotope Aridity Index for Terrestrial Environments.” Proceedings of the National Academy of Sciences of the United States of America 103 (30): 11201-5. http://dx.doi.org/10.1073/pnas.0604719103. Medline:16840554
84. Levin, N. E., J. Quade, S. W. Simpson, S. Semaw, and M. Rogers. 2004. “Isotopic Evidence for Plio-Pleistocene Environmental Change at Gona, Ethiopia.” Earth and Planetary Science Letters 219 (1-2): 93-110. http://dx.doi.org/10.1016/S0012-821X(03)00707-6.
85. Longinelli, A. 1984. “Oxygen isotopes in mammal bone phosphate: a new tool for paleohydro-logical and paleoclimatological research?” Geochimica et Cosmochimica Acta 48, 385-390.
86. Lough, S. A., J. Rivera, and C. L. Comar. 1963. “Retention of Strontium, Calcium and Phosphorous in Human Infants.” Proceedings of the Society for Experimental Biology and Medicine 112:631-6.
87. Luz, B. and Y. Kolodny. 1985. “Oxygen isotopes variations in phosphate of biogenic apatites, IV. Mammal teeth and bones.” Earth and Planetary Science Letters 75, 29-36.
88. Lyman, R. L. 1994. Vertebrate Taphonomy. Cambridge: Cambridge University Press.
89. McGrew, W. C., M. J. Sharman, P. J. Baldwin, and C.E.G. Tutin. 1982. “On Early Hominid Plant-Food Niches.” Current Anthropology 23:213-4.
90. McHenry, H. M., and K. Coffing. 2000. “Australopithecus to Homo: Transformations in Body and Mind.” Annual Review of Anthropology 29 (1): 125-46. http://dx.doi.org/10.1146/annurev.anthro.29.1.125.
91. Milton, K. 1990. “Annual Mortality Patterns of a Mammal Community in Central Panama.” Journal of Tropical Ecology 6 (04): 493-9. http://dx.doi.org/10.1017/S0266467400004909.
92. Milton, K. 1999. “A Hypothesis to Explain the Role of Meat-Eating in Human Evolution.” Evolutionary Anthropology 8 (1): 11-21. http://dx.doi.org/10.1002/(SICI)1520-6505(1999) 8:1<11::AID-EVAN6>3.0.CO;2-M.
93. O’Connell, J. F., K. Hawkes, and N. G. Blurton Jones. 1999. “Grandmothering and the Evolution of Homo erectus.” Journal of Human Evolution 36 (5): 461-85. http://dx.doi.org/10.1006/jhev.1998.0285. Medline:10222165
94. O’Leary, M. 1981. “Carbon Isotope Fractionation in Plants.” Phytochemistry 20 (4): 553-67. http://dx.doi.org/10.1016/0031-9422(81)85134-5.
95. Passey, B. H., and T. E. Cerling. 2002. “Tooth Enamel Mineralization in Ungulates Implications for Recovering a Primary Isotopic Time-Series.” Geochimica et Cosmochimica Acta 66 (18): 3225-34. http://dx.doi.org/10.1016/S0016-7037(02)00933-X.
96. Passey, B. H., and T. E. Cerling. 2006. “In situ Stable Isotope Analysis (d13C, d18O) of Very Small Teeth Using Laser Ablation GC/IRMS.” Chemical Geology 235: 238-49.
97. Passey, B. H., T. F. Robinson, L. K. Ayliffe, T. E. Cerling, M. Sponheimer, M. D. Dearing, B. L. Roeder, and J. R. Ehleringer. 2005. “Carbon Isotope Fractionation between Diet Breadth, CO2, and Bioapatite in Different Mammals.” Journal of Archaeological Science 32 (10): 1459-70. http://dx.doi.org/10.1016/j.jas.2005.03.015.
98. Peters, C. R., and J. C. Vogel. 2005. “Africa's Wild C4 Plant Foods and Possible Early Hominid Diets.” Journal of Human Evolution 48 (3): 219-36. http://dx.doi.org/10.1016/j.jhevol.2004.11.003. Medline:15737391
99. Pickering, R., J. D. Kramers, P. J. Hancox, D. J. de Ruiter, and J. D. Woodhead. 2011. “Contemporary Flowstone Development Links Early Hominin Bearing Cave Deposits in South Africa.” Earth and Planetary Science Letters 306 (1-2): 23-32. http://dx.doi.org/10.1016/j.epsl.2011.03.019.
100. Plummer, T. W., P. W. Ditchfield, L. C. Bishop, J. D. Kingston, J. V. Ferraro, D. R. Braun, F. Hertel, and R. Potts. 2009. “Oldest Evidence of Tool Making Hominins in a GrasslandDominated Ecosystem.” PLoS ONE 4 (9): e7199. http://dx.doi.org/10.1371/journal.pone.0007199.Medline:19844568
101. Potts, R. 1996. “Evolution and Climate Variability.” Science 273 (5277): 922-3. http://dx.doi.org/10.1126/science.273.5277.922.
102. Price, T. D., J. Blitz, J. H. Burton, and J. Ezzo. 1992. “Diagenesis in Prehistoric Bone: Problems and Solutions.” Journal of Archaeological Science 19 (5): 513-29. http://dx.doi.org/10.1016/0305-4403(92)90026-Y.
103. Reed, K. E. Feb-Mar 1997. “Early Hominid Evolution and Ecological Change through the African Plio-Pleistocene.” Journal of Human Evolution 32 (2-3): 289-322. http://dx.doi.org/10.1006/jhev.1996.0106. Medline:9061560
104. Richard, A. F., R. E. Dewar, M. Schwartz, and J. Ratsirarson. 2002. “Life in the Slow Lane? Demography and Life Histories of Male and Female Sifaka (Propithecus verreauxi verreauxi)Journal of Zoology (London, England) 256 (4): 421-36. http://dx.doi.org/10.1017/S0952836902000468.
105. Robinson, J. T. 1954. “Prehominid Dentition and Hominid Evolution.” Evolution; International Journal of Organic Evolution 8 (4): 324-34. http://dx.doi.org/10.2307/2405779.
106. Rossouw, L., and L. Scott. 2011. “Phytoliths and Pollen, the Microscopic Plant Remains in Pliocene Volcanic Sediments around Laetoli, Tanzania.” In Paleontology and Geology of Laetoli: Human Evolution in Context, vol. 1, ed. T. Harrison, 201-215. Dordrecht: Springer. http://dx.doi.org/10.1007/978-90-481-9956-3_9
107. Runia, L. J. 1987. “Strontium and Calcium Distribution in Plants: Effect on Paleodietary Studies.” Journal of Archaeological Science 14 (6): 599-608. http://dx.doi.org/10.1016/0305-4403(87)90078-1.
108. Sage, R. F. 2004. “The Evolution of C4 Photosynthesis.” New Phytologist 161 (2): 341-70. http://dx.doi.org/10.1111/j.1469-8137.2004.00974.x.
109. Schoeninger, M. J., J. Moore, and J. M. Sept. 1999. “Subsistence Strategies of Two ‘Savanna’ Chimpanzee Populations: The Stable Isotope Evidence.” American Journal of Primatology 49 (4): 297-314. http://dx.doi.org/10.1002/(SICI)1098-2345(199912)49:4<297::AID-AJP2>3.0.CO;2-N. Medline:10553959
110. Scott, R. S., P. S. Ungar, T. S. Bergstrom, C. A. Brown, F. E. Grine, M. F. Teaford, and A. Walker. 2005. “Dental Microwear Texture Analysis Shows Within-Species Diet Variability in Fossil Hominins.” Nature 436 (7057): 693-5. http://dx.doi.org/10.1038/nature03822. Medline:16079844
111. Ségalen, L., J. A. Lee-Thorp, and T. C. Cerling. 2007. “Timing of C4 Grass Expansion across Sub-Saharan Africa.” Journal of Human Evolution 53 (5): 549-59. http://dx.doi.org/10.1016/j.jhevol.2006.12.010. Medline:17905413
112. Sillen, A. 1981. “Strontium and Diet at Hayonim Cave.” American Journal of Physical Anthropology 56 (2): 131-7. http://dx.doi.org/10.1002/ajpa.1330560204. Medline:7325216
113. Sillen, A. 1988. “Elemental and Isotopic Analysis of Mammalian Fauna from Southern Africa and Their Implications for Paleodietary Research.” American Journal of Physical Anthropology 76 (1): 49-60. http://dx.doi.org/10.1002/ajpa.1330760106.
114. Sillen, A. 1989. “Diagenesis of the Inorganic Phase of Cortical Bone.” In The Chemistry of Prehistoric Human Bone, ed. T. D. Price, 211-299. Cambridge: Cambridge University Press.
115. Sillen, A. 1992. “Strontium-Calcium Ratios (Sr/Ca) of Australopithecus robustus and Associated Fauna from Swartkrans.” Journal of Human Evolution 23 (6): 495-516. http://dx.doi.org/10.1016/0047-2484(92)90049-F.
116. Sillen, A., G. Hall, and R. Armstrong. 1995. “Strontium Calcium Ratios (Sr/Ca) and Strontium Isotope Ratios (87Sr/86Sr) of Australopithecus robustus and Homo sp. from Swartkrans.” Journal of Human Evolution 28 (3): 277-85. http://dx.doi.org/10.1006/jhev.1995.1020.
117. Smith, B. N., and S. Epstein. 1971. “Two Categories of 13C/12C Ratios for Higher Plants.” Plant Physiology 47 (3): 380-4. http://dx.doi.org/10.1104/pp.47.3.380. Medline:16657626
118. Spencer, H., J. M. Warren, L. Kramer, and J. Samachson. Mar-Apr 1973. “Passage of Calcium and Strontium across the Intestine in Man.” Clinical Orthopaedics and Related Research 91 (91): 225-34. http://dx.doi.org/10.1097/00003086-197303000-00031. Medline:4703151
119. Sponheimer, M. 1999. “Isotopic Ecology of the Makapansgat Limeworks Fauna.” Ph.D. Dissertation, Rutgers University.
120. Sponheimer, M., Z. Alemseged, T. E. Cerling, F. E. Grine, W. H. Kimbel, M. G. Leakey, J. A. Lee-Thorp, F. K. Manthi, K. Reed, B. A. Wood, J. G. Wynn. Pre-Review Version of “Isotopic Evidence of Early Hominin Diets: Past, Present, and Future.” Figshare. http://dx.doi.org/10.6084/m9.figshare.628068. Retrieved 19:19, February 21, 2013 (GMT).
121. Sponheimer, M., D. de Ruiter, J. A. Lee-Thorp, and A. Späth. 2005a. “Sr/Ca and Early Hominin Diets Revisited: New Data from Modern and Fossil Tooth Enamel.” Journal of Human Evolution 48 (2): 147-56. http://dx.doi.org/10.1016/j.jhevol.2004.09.003. Medline:15701528
122. Sponheimer, M., and J. A. Lee-Thorp. 1999a. “Isotopic Evidence for the Diet of an Early Hominid, Australopithecus africanus.” Science 283 (5400): 368-70. http://dx.doi.org/10.1126/science.283.5400.368. Medline:9888848
123. Sponheimer, M., and J. A. Lee-Thorp. 1999b. “Oxygen Isotopes in Enamel Carbonate and Their Ecological Significance.” Journal of Archaeological Science 26 (6):723-8. http://dx.doi.org/10.1006/jasc.1998.0388.
124. Sponheimer, M., and J. A. Lee-Thorp. 2001. “The Oxygen Isotope Composition of Mammalian Enamel Carbonate from Morea Estate, South Africa.” Oecologia 126:153-7 http://dx.doi.org/10.1007/s004420000498.
125. Sponheimer, M., and J. A. Lee-Thorp. 2003. “Differential Resource Utilization by Extant Great Apes and Australopithecines: Towards Solving the C4 Conundrum.” Comparative Biochemistry and Physiology: Part A, Molecular and Integrative Physiology 136 (1): 27-34. http://dx.doi.org/10.1016/S1095-6433(03)00065-5. Medline:14527627
126. Sponheimer, M., and J. A. Lee-Thorp. 2006. “Enamel Diagenesis at South African Australopith Sites: Implications for Paleoecological Reconstruction with Trace Elements.” Geochimica et Cosmochimica Acta 70 (7): 1644-54. http://dx.doi.org/10.1016/j.gca.2005.12.022.
127. Sponheimer, M., J. A. Lee-Thorp, D. de Ruiter, D. Codron, J. Codron, A. T. Baugh, and F. Thackeray. 2005b. “Hominins, Sedges, and Termites: New Carbon Isotope Data from the Sterkfontein Valley and Kruger National Park.” Journal of Human Evolution 48 (3): 301-12. http://dx.doi.org/10.1016/j.jhevol.2004.11.008. Medline:15737395
128. Sponheimer, M., J. E. Loudon, D. Codron, M. E. Howells, J. D. Pruetz, J. Codron, D. J. de Ruiter, and J. A. Lee-Thorp. 2006a. “Do ‘Savanna’ Chimpanzees Consume C4 Resources?” Journal of Human Evolution 51 (2): 128-33. http://dx.doi.org/10.1016/j.jhevol.2006.02.002. Medline:16630647
129. Sponheimer, M., B. H. Passey, D. J. de Ruiter, D. Guatelli-Steinberg, T. E. Cerling, and J. A. Lee-Thorp. 2006b. “Isotopic Evidence for Dietary Variability in the Early Hominin Paranthropus robustus.” Science 314 (5807): 980-2. http://dx.doi.org/10.1126/science.1133827. Medline:17095699
130. Stanford, C. B., and J. B. Nkurunungi. 2003. “Sympatric Ecology of Chimpanzees and Gorillas in Bwindi Impenetrable National Park, Uganda: Diet.” International Journal of Primatology 24 (4): 901-18. http://dx.doi.org/10.1023/A:1024689008159.
131. Stock, W. D., D. K. Chuba, and G. A. Verboom. 2004. “Distribution of South African C-3 and C-4 Species of Cyperaceae in Relation to Climate and Phylogeny.” Austral Ecology29 (3): 313-9. http://dx.doi.org/10.1111/j.1442-9993.2004.01368.x.
132. Strum, S. C. 1987. Almost Human: A Journey into the World of Baboons. New York: Random House.
133. Sullivan, C. H., and H. W. Krueger. 1981. “Carbon Isotope Analysis of Separate Chemical Phases in Modern and Fossil Bone.” Nature 292 (5821): 333-5. http://dx.doi.org/10.1038/292333a0. Medline:7019719
134. Sullivan, C. H., and H. W. Krueger. 1983. “Carbon Isotope Ratios of Bone Apatite and Animal Diet Reconstruction.” Nature 301 (5896): 177-8. http://dx.doi.org/10.1038/301177a0. Medline:6337340
135. Teaford, M. F., P. S. Ungar, and F. E. Grine. 2002. “Paleontological Evidence for the Diets of African Plio-Pleistocene Hominins with Special Reference to Early Homo.” In Human Diet: Its Origin and Evolution, ed. P. S. Ungar and M. F. Teaford, 143-166. Westport, CT: Bergin and Garvey.
136. Teleki, G. 1981. “The Omnivorous Diet and Eclectic Feeding Habits of Chimpanzees in Gombe National Park, Tanzania.” In Omnivorous Primates, ed. R.S.O. Harding and G. Teleki, 303-343. New York: Columbia University Press.
137. Tieszen, L. L. 1991. “Natural Variations in the Carbon Isotope Values of Plants: Implications for Archaeology, Ecology, and Paleoecology.” Journal of Archaeological Science 18 (3): 227-48. http://dx.doi.org/10.1016/0305-4403(91)90063-U.
138. Tieszen, L. L., and T. Fagre. 1993. “Effect of Diet Quality and Composition on the Isotopic Composition of Respiratory CO2, Bone Collagen, Bioapatite, and Soft Tissues.” In Prehistoric Human Bone: Archaeology at the Molecular Level, ed. J. B. Lambert and G. Grupe, 121-155. Berlin: Springer.
139. Toots, H., and M. R. Voorhies. 1965. “Strontium in Fossil Bones and the Reconstruction of Food Chains.” Science 149 (3686): 854-5. http://dx.doi.org/10.1126/science.149.3686.854. Medline:17737382
140. Trickett, M. A., P. Budd, J. Montgomery, and J. Evans. 2003. “An Assessment of Solubility Profiling as a Decontamination Procedure for the 87Sr/86Sr Analysis of Archaeological Human Skeletal Tissue.” Applied Geochemistry 18 (5): 653-8. http://dx.doi.org/10.1016/S0883-2927(02)00181-6.
141. Tuross, N., A. K. Behrensmeyer, and E. D. Eanes. 1989. “Strontium Increases and Crystallinity Changes in Taphonomic and Archaeological Bone.” Journal of Archaeological Science 16 (6): 661-72. http://dx.doi.org/10.1016/0305-4403(89)90030-7.
142. Tutin, C.E.G., and M. Fernandez. 1985. “Food Consumed by Sympatric Populations of Gorilla g. gorilla and Pan. t. troglodytes in Gabon: Some Preliminary Data.” International Journal of Primatology 6 (1): 27-43. http://dx.doi.org/10.1007/BF02693695.
143. Ungar, P. 2004. “Dental Topography and Diets of Australopithecus afarensis and Early Homo.” Journal of Human Evolution 46 (5): 605-22. http://dx.doi.org/10.1016/j.jhevol.2004.03.004.Medline:15120268
144. Ungar, P. S. 1998. “Dental Allometry, Morphology, and Wear as Evidence for Diet in Fossil Primates.” Evolutionary Anthropology 6 (6): 205-17. http://dx.doi.org/10.1002/(SICI)1520-6505(1998)6:6<205::AID-EVAN3>3.0.CO;2-9.
145. Ungar, P. S., and F. E. Grine. 1991. “Incisor Size and Wear in Australopithecus africanus and Paranthropus robustus." Journal of Human Evolution 20 (4): 313-40. http://dx.doi.org/10.1016/0047-2484(91)90013-L.
146. Ungar, P. S., F. E. Grine, and M. F. Teaford. 2008. “Dental Microwear and Diet of the Plio-Pleistocene Hominin Paranthropus boisei.” PLoS ONE 3 (4): e2044. http://dx.doi.org/10.1371/journal.pone.0002044. Medline:18446200
147. Ungar, P. S., and M. Sponheimer. 2011. “The Diets of Early Hominins.” Science 334 (6053): 190-3. http://dx.doi.org/10.1126/science.1207701. Medline:21998380
148. van der Merwe, N. J., F. T. Masao, and R. J. Bamford. 2008. “Isotopic Evidence for Contrasting Diets of Early Hominins Homo habilis and Australopithecus boisei of Tanzania.” South African Journal of Science 104:153-5.
149. van der Merwe, N. J., and E. Medina. 1989. “Photosynthesis and 13C/12C Ratios in Amazonian Rain Forests.” Geochimica et Cosmochimica Acta 53 (5): 1091-4. http://dx.doi.org/10.1016/0016-7037(89)90213-5.
150. van der Merwe, N. J., J. F. Thackeray, J. A. Lee-Thorp, and J. Luyt. 2003. “The Carbon Isotope Ecology and Diet of Australopithecus africanus at Sterkfontein, South Africa.” Journal of Human Evolution 44 (5): 581-97. http://dx.doi.org/10.1016/S0047-2484(03)00050-2. Medline:12765619
151. van der Merwe, N. J., and J. C. Vogel. 1978. “13C Content of Human Collagen as a Measure of Prehistoric Diet in Woodland North America.” Nature 276 (5690): 815-6. http://dx.doi.org/10.1038/276815a0. Medline:364321.
152. Vogel, J. C. 1978. “Recycling of Carbon in a Forest Environment.” Oecologia Plantarum13:89-94.
153. Vogel, J. C., and N. J. van der Merwe. 1977. “Isotopic Evidence for Early Maize Cultivation in New York State.”American Antiquity 42 (2): 238-42. http://dx.doi.org/10.2307/278984.
154. Vrba, E. S. 1980. “The Significance of Bovid Remains as Indicators of Environment and Predation Patterns.” In Fossils in the Making, ed. A.K. Behrensmeyer and A. P. Hill, 247-272. Chicago: University of Chicago Press.
155. Vrba, E. 1985. “Ecological and Adaptive Changes Associated with Early Hominid Evolution.” In Ancestors: The Hard Evidence, ed. E. Delson, 63-71. New York: Alan R. Liss.
156. Wang, Y., and T. E. Cerling. 1994. “A Model of Fossil Tooth and Bone Diagenesis: Implications for Paleodiet Reconstruction from Stable Isotopes.” Palaeogeography, Palaeoclimatology, Palaeoecology 107 (3-4): 281-9. http://dx.doi.org/10.1016/0031-0182(94)90100-7.
157. White, T. D., S. H. Ambrose, G. Suwa, D. F. Su, D. DeGusta, R. L. Bernor, J. R. Boisserie, M. Brunet, E. Delson, S. Frost, et al. 2009. “Macrovertebrate Paleontology and the Pliocene Habitat of Ardipithecus ramidus.” Science 326 (5949): 87-93. http://dx.doi.org/10.1126/science.1175822 www.sciencemag.org/cgi/content/full/326/5949/67/DC1. Medline:19810193
158. Winter, K., and J.A.C. Smith. 1996. Crassulacean Acid Metabolism: Biochemistry, Ecophysiology and Evolution. Berlin: Springer-Verlag.
159. Wrangham, R. W., J. H. Jones, G. Laden, D. Pilbeam, and N. L. Conklin-Brittain. 1999. “The Raw and Stolen. Cooking and the Ecology of Human Origins.” Current Anthropology 40 (5): 567-94. http://dx.doi.org/10.1086/300083. Medline:10539941
160. Wyckoff, R.W.G., and A. R. Doberenz. 1968. “The Strontium Content of Fossil Teeth and Bones.” Geochimica et Cosmochimica Acta 32 (1): 109-15. http://dx.doi.org/10.1016/0016-7037(68)90090-2.
161. Zazzo, A., H. Bocherens, M. Brunet, A. Beauvilain, D. Billiou, H. T. Mackaye, P. Vignaud, and A. Mariotti. 2000. “Herbivore Paleodiet and Paleoenvironment Changes in Chad during the Pliocene Using Stable Isotope Ratios in Tooth Enamel Carbonate.” Paleobiology 26 (2): 294-309. http://dx.doi.org/10.1666/0094-8373(2000)026<0294:HPAPCI>2.0.CO;2.