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

@article{Secord2012EvolutionOT,
  title={Evolution of the Earliest Horses Driven by Climate Change in the Paleocene-Eocene Thermal Maximum},
  author={Ross Secord and Jonathan I. Bloch and Stephen G. B. Chester and Doug M. Boyer and Aaron R. Wood and Scott L. Wing and Mary J. Kraus and Francesca A. McInerney and John Krigbaum},
  journal={Science},
  year={2012},
  volume={335},
  pages={959 - 962}
}
Warming and Shrinking In most mammals, individual body sizes tend to be smaller in warmer regions and larger in cooler regions. Secord et al. (p. 959; see the Perspective by Smith) examined a high-resolution 175,000-year record of equid fossils deposited over a past climate shift—the Paleocene-Eocene Thermal Maximum—for changes in body size. Using oxygen isotopes collected from the teeth of co-occurring mammal species to track prevailing environmental temperature, a clear decrease in equid body… 
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References

SHOWING 1-10 OF 66 REFERENCES
Continental warming preceding the Palaeocene–Eocene thermal maximum
TLDR
It is shown that continental warming of about 5 °C preceded the CIE in the Bighorn Basin, Wyoming and the results suggest that at least two sources of warming—the earlier of which is unlikely to have been methane—contributed to the PETM.
A humid climate state during the Palaeocene/Eocene thermal maximum
TLDR
The authors' results provide evidence for a previously unrecognized discrete shift in the state of the climate system during the PETM, characterized by large increases in mid-latitude tropospheric humidity and enhanced cycling of carbon through terrestrial ecosystems.
Environment and evolution through the Paleocene-Eocene thermal maximum.
  • P. Gingerich
  • Geology, Medicine
    Trends in ecology & evolution
  • 2006
TLDR
Global environmental events such as the PETM have had profound effects on evolution in the geological past and must be considered when modeling the history of life and when considering the causes and consequences of global greenhouse warming.
The Paleocene-Eocene Thermal Maximum: A Perturbation of Carbon Cycle, Climate, and Biosphere with Implications for the Future
During the Paleocene-Eocene Thermal Maximum (PETM), ∼56 Mya, thousands of petagrams of carbon were released into the ocean-atmosphere system with attendant changes in the carbon cycle, climate, ocean
A tale of two species: Extirpation and range expansion during the late Quaternary in an extreme environment
Abstract Death Valley, California is today the hottest hyperarid area in the western Hemisphere with temperatures of 57 °C (134 °F) recorded. During the late Quaternary, pluvial Lake Manly covered
Transient Floral Change and Rapid Global Warming at the Paleocene-Eocene Boundary
TLDR
Floral response to warming and/or increased atmospheric CO2 during the PETM was comparable in rate and magnitude to that seen in postglacial floras and to the predicted effects of anthropogenic carbon release and climate change on future vegetation.
Magnitude of the carbon isotope excursion at the Paleocene-Eocene thermal maximum: The role of plant community change
Carbon-isotope measurements (δ 13 C) of leaf-wax n-alkanes from the Paleocene–Eocene Thermal Maximum (PETM) in the Bighorn Basin, Wyoming, reveal a negative carbon isotope excursion (CIE) of 4–5‰,
Transient drying during the Paleocene–Eocene Thermal Maximum (PETM): Analysis of paleosols in the bighorn basin, Wyoming
Abstract The Paleocene Eocene Thermal Maximum (PETM) was a transient episode of global warming that occurred at the Paleocene/Eocene boundary. The event is marked by a sharp decline in carbon isotope
Correlation between isotope records in marine and continental carbon reservoirs near the Palaeocene/Eocene boundary
CHANGES in the isotope content of the large marine carbon reservoir can force shifts in that of the smaller carbon pools in the atmosphere and on land. The carbon isotope compositions of marine
MAMMALIAN COMMUNITY RESPONSE TO THE LATEST PALEOCENE THERMAL MAXIMUM : AN ISOTAPHONOMIC STUDY IN THE NORTHERN BIGHORN BASIN, WYOMING
New stratigraphic and paleontological information from the McCullough Peaks, northern Bighorn Basin, Wyoming, is incorporated into an isotaphonomic faunal database and used to investigate the impact
...
1
2
3
4
5
...