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Dental Mesowear and the Palaeodiets of Bovids From Makapansgat Limeworks Cave, South AfricaSchubert, Blaine W. 01 May 2007 (has links) (PDF)
The palaeodiet of seven bovids from Makapansgat Limeworks Cave are analysed using dental mesowear. Results suggest that Tragelaphus pricei had a highly attritional diet and was thus a browser. Tragelaphus sp. aff. T. angasii and Aepyceros sp. were also browsers, having diets similar in texture to the extant mule deer (Odocoileus hemionus). Gazella vanhoepeni had an intermediate attrition-abrasion wear signal and groups most closely with extant mixed feeders. Redunca darti and Makapania broomi are at the abrasion end of the wear continuum and cluster with living grazers, such as the hippotragines and reduncines. Parmularius braini had a highly abrasive diet similar to extreme grazers like the American bison (Bison bison) and topi (Damaliscus lunatus). The bovid mesowear data were compared to previous palaeodietary studies using taxonomic uniformitarianism, ecomorphology (hypsodonty), and stable carbon isotopes on the same Makapansgat taxa. This comparison showed that the mesowear results are most closely in-line with the isotope data, both of which are non-genetic signals that reflect diet during an extended portion of an animal's life.
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Microwear Evidence for Plio-Pleistocene Bovid Diets From Makapansgat Limeworks Cave, South AfricaSchubert, Blaine, Ungar, Peter S., Sponheimer, Matt, Reed, Kaye E. 09 November 2006 (has links)
Makapansgat Limeworks Cave is a well-known Australopithecus africanus bearing locality that has spawned a considerable amount of paleoecological research because of its hominin component. Most recently, the paleoecology of this Plio-Pleistocene site has been studied by determining the diet and habitat of other extinct taxa, particularly the bovids. The diets of seven bovids (Aepyceros sp., Gazella vanhoepeni, Makapania broomi, Parmularius braini, Redunca darti, Tragelaphus sp. aff. T. angasii, and Tragelaphus pricei) have now been classified using taxonomic uniformitarianism, ecomorphology, stable carbon isotopes, and mesowear analysis. Here, dental microwear is applied to the same bovids for additional comparison and to further elucidate the strengths and weaknesses of each method. The different dietary proxy methods noted provide a temporal continuum, with genetic signals such as ecomorphology and taxonomic uniformitarianism indicating behavioral adaptations over geologic time, while nongenetic data such as stable carbon isotopes and mesowear reflect different aspects of average diet over extended portions of an animal's life, and dental microwear provides dietary snapshots. Microwear separated an extant baseline of ten bovid species into expected dietary categories and the Makapansgat bovids clearly fell into two groups with the same degree of separation as between extant grazers and browsers. The results indicate that a multidisciplinary approach produces a more accurate and robust reconstruction of past diets. In sum, the microwear analysis is in-line with the isotope and mesowear results, which suggest a stronger browsing component than either taxonomic uniformitarianism or ecomorphology imply.
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