An early Miocene extinction in pelagic sharks.
| Autor: | Sibert EC; Harvard Society of Fellows, Harvard University, Cambridge, MA 02138, USA. elizabeth.sibert@yale.edu.; Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.; Department of Earth and Planetary Sciences, Yale University, New Haven, CT 06511, USA., Rubin LD; College of the Atlantic, Bar Harbor, ME 04609, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Science (New York, N.Y.) [Science] 2021 Jun 04; Vol. 372 (6546), pp. 1105-1107. |
| DOI: | 10.1126/science.aaz3549 |
| Abstrakt: | Shark populations have been decimated in recent decades because of overfishing and other anthropogenic stressors; however, the long-term impacts of such changes in marine predator abundance and diversity are poorly constrained. We present evidence for a previously unknown major extinction event in sharks that occurred in the early Miocene, ~19 million years ago. During this interval, sharks virtually disappeared from open-ocean sediments, declining in abundance by >90% and morphological diversity by >70%, an event from which they never recovered. This abrupt extinction occurred independently from any known global climate event and ~2 million to 5 million years before diversifications in the highly migratory, large-bodied predators that dominate pelagic ecosystems today, indicating that the early Miocene was a period of rapid, transformative change for open-ocean ecosystems. (Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.) |
| Databáze: | MEDLINE |
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