2009
DOI: 10.1371/journal.pone.0005750
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Effects of Global Warming on Ancient Mammalian Communities and Their Environments

Abstract: BackgroundCurrent global warming affects the composition and dynamics of mammalian communities and can increase extinction risk; however, long-term effects of warming on mammals are less understood. Dietary reconstructions inferred from stable isotopes of fossil herbivorous mammalian tooth enamel document environmental and climatic changes in ancient ecosystems, including C3/C4 transitions and relative seasonality.Methodology/Principal FindingsHere, we use stable carbon and oxygen isotopes preserved in fossil … Show more

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Cited by 66 publications
(91 citation statements)
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“…Nonetheless, all macropods with sample sizes appropriate for analysis demonstrate a significant decline in δ 13 C values with increased aridity (p < 0.05). Declining δ 13 C values are contrary to expectations, as increased aridity is likely to result in greater (i.e., water-stressed; Tieszen 1991) δ 13 C values and/or an increase of C 4 vegetation on the landscape (as seen in DeSantis et al 2009). Significant declines in δ 13 C values, coupled with aridity, suggest that macropods were shifting their diets to compensate for changing climatic conditions.…”
Section: Carbon Isotopes and Dietary Nichesmentioning
confidence: 77%
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“…Nonetheless, all macropods with sample sizes appropriate for analysis demonstrate a significant decline in δ 13 C values with increased aridity (p < 0.05). Declining δ 13 C values are contrary to expectations, as increased aridity is likely to result in greater (i.e., water-stressed; Tieszen 1991) δ 13 C values and/or an increase of C 4 vegetation on the landscape (as seen in DeSantis et al 2009). Significant declines in δ 13 C values, coupled with aridity, suggest that macropods were shifting their diets to compensate for changing climatic conditions.…”
Section: Carbon Isotopes and Dietary Nichesmentioning
confidence: 77%
“…Bulk samples were taken parallel to the growth axis of the tooth, while serial samples were taken perpendicular to the growth axis. Enamel powder was pretreated with 30% hydrogen peroxide for 24 h and 0.1 N acetic acid for 12 h to remove organics and secondary carbonates, respectively (Koch et al 1997;DeSantis et al 2009). These samples (~1 mg per sample) were then run on a VG Prism stable isotope ratio mass spectrometer with an in-line ISOCARB automatic sampler in the Department of Geological Sciences at the University of Florida.…”
Section: Stable Isotope Analysesmentioning
confidence: 99%
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“…Forty four percent of the mammalian genera identified in the Viko vijin L. F., were mainly grazers, while the rest were mixed feeders or browsers (MacFadden & Cerling, 1996;Koch et al, 1998;Feranec, 2004;Prado et al, 2005;Rivals et al, 2007;DeSantis et al, 2009). This suggests Hibbard, 1955;Mooser & Dalquest, 1975;Miller & Carranza-Castañeda, 1984;Webb & Perrigo, 1984;Montellano-Ballesteros, 1992;Lucas et al, 1997;Cisneros, 2005;Pearson, 2005;Meade et al, 2006;Laurito & Aguilar, 2007;Lucas et al, 2008).…”
Section: Habitat Considerationsmentioning
confidence: 99%