Evolution of the Earliest Horses Driven by Climate Change in the Paleocene-Eocene Thermal Maximum

被引:121
作者
Secord, Ross [1 ,2 ]
Bloch, Jonathan I. [2 ]
Chester, Stephen G. B. [3 ]
Boyer, Doug M. [4 ]
Wood, Aaron R. [2 ,5 ]
Wing, Scott L. [6 ]
Kraus, Mary J. [7 ]
McInerney, Francesca A. [8 ]
Krigbaum, John [9 ]
机构
[1] Univ Nebraska, Dept Earth & Atmospher Sci, Lincoln, NE 68588 USA
[2] Univ Florida, Florida Museum Nat Hist, Gainesville, FL 32611 USA
[3] Yale Univ, Dept Anthropol, New Haven, CT 06520 USA
[4] CUNY Brooklyn Coll, Dept Anthropol & Archaeol, Brooklyn, NY 11210 USA
[5] S Dakota Sch Mines & Technol, Dept Geol & Geol Engn, Rapid City, SD 57701 USA
[6] Smithsonian Museum Nat Hist, Dept Paleobiol, Washington, DC 20560 USA
[7] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA
[8] Northwestern Univ, Dept Earth & Planetary Sci, Evanston, IL 60208 USA
[9] Univ Florida, Dept Anthropol, Gainesville, FL 32611 USA
关键词
ISOTOPE FRACTIONATION; STABLE-ISOTOPES; BERGMANNS RULE; BIGHORN BASIN; BODY-SIZE; CARBON; MAMMALS; CO2;
D O I
10.1126/science.1213859
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Body size plays a critical role in mammalian ecology and physiology. Previous research has shown that many mammals became smaller during the Paleocene-Eocene Thermal Maximum (PETM), but the timing and magnitude of that change relative to climate change have been unclear. A high-resolution record of continental climate and equid body size change shows a directional size decrease of similar to 30% over the first similar to 130,000 years of the PETM, followed by a similar to 76% increase in the recovery phase of the PETM. These size changes are negatively correlated with temperature inferred from oxygen isotopes in mammal teeth and were probably driven by shifts in temperature and possibly high atmospheric CO2 concentrations. These findings could be important for understanding mammalian evolutionary responses to future global warming.
引用
收藏
页码:959 / 962
页数:4
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