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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Whiteside, Jessica H. Irmis, Randall B. Dunlavey, Maria Lindström, Sofie Nesbitt, Sterling J. Smith, Nathan D. Turner, Alan H. Schaller, Morgan F. Glasspool, Ian J. |
| Description | Author Affiliation: Whiteside JH ( Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton SO14 3ZH, United Kingdom); Lindström S ( Department of Stratigraphy, Geological Survey of Denmark and Greenland, DK-1350 Copenhagen K, Denmark); Irmis RB ( Natural History Museum of Utah, Salt Lake City, UT 84108-1214); Glasspool IJ ( Department of Geology, Colby College, Waterville, ME 04901-8858); Schaller MF ( Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, NY 12180); Dunlavey M ( Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912); Nesbitt SJ ( Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061); Smith ND ( Department of Biology, Howard University, Washington, DC 20059); Turner AH ( Department of Anatomical Sciences, Stony Brook University, Stony Brook, NY 11794.); |
| Abstract | A major unresolved aspect of the rise of dinosaurs is why early dinosaurs and their relatives were rare and species-poor at low paleolatitudes throughout the Late Triassic Period, a pattern persisting 30 million years after their origin and 10–15 million years after they became abundant and speciose at higher latitudes. New palynological, wildfire, organic carbon isotope, and atmospheric $pCO_{2}$ data from early dinosaur-bearing strata of low paleolatitudes in western North America show that large, high-frequency, tightly correlated variations in $δ^{13}C_{org}$ and palynomorph ecotypes occurred within a context of elevated and increasing $pCO_{2}$ and pervasive wildfires. Whereas pseudosuchian archosaur-dominated communities were able to persist in these same regions under rapidly fluctuating extreme climatic conditions until the end-Triassic, large-bodied, fast-growing tachymetabolic dinosaurian herbivores requiring greater resources were unable to adapt to unstable high $CO_{2}$ environmental conditions of the Late Triassic. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 26 |
| Volume Number | 112 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2015-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Dinosaurs Ecosystem Tropical Climate Animals Carbon Isotopes Fires Hot Temperature Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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