Dietary reconstruction of pygmy mammoths from Santa Rosa Island of California
作者： Gina M. Semprebon , Florent Rivals , Julia M. Fahlke , William J. Sanders , Adrian M. Lister
DOI: 10.1016/J.QUAINT.2015.10.120
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摘要: Abstract Microwear analyses have proven to be reliable for elucidating dietary differences in taxa with similar gross tooth morphologies. We analyzed enamel microwear of a large sample Channel Island pygmy mammoth (Mammuthus exilis) molars from Santa Rosa Island, California and compared our results those extant proboscideans, ungulates, mainland fossil mammoths mastodons North America Europe. Our show distinct narrowing niche space after colonized as M. exilis became more specialized on browsing leaves twigs than the Columbian modern elephant pattern switching between browse grass. Scratch numbers scratch width scores support this interpretation does Pleistocene vegetation history whereby extensive conifer forests were available during last glacial when flourished. The ecological disturbances alteration (i.e., diminishing forests) climate warmed suggests that climatic factors may been contributing factor extinction Late Pleistocene.
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