Ocean acidification and the Permo-Triassic mass extinction
Ocean acidification triggered by Siberian Trap volcanism was a possible kill mechanism for the Permo-Triassic Boundary mass extinction, but direct evidence for an acidification event is lacking. We present a high-resolution seawater pH record across this interval, using boron isotope data combined w...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2015-04, Vol.348 (6231), p.229-232 |
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| creator | Clarkson, M. O. Kasemann, S. A. Wood, R. A. Lenton, T. M. Daines, S. J. Richoz, S. Ohnemueller, F. Meixner, A. Poulton, S. W. Tipper, E. T. |
| description | Ocean acidification triggered by Siberian Trap volcanism was a possible kill mechanism for the Permo-Triassic Boundary mass extinction, but direct evidence for an acidification event is lacking. We present a high-resolution seawater pH record across this interval, using boron isotope data combined with a quantitative modeling approach. In the latest Permian, increased ocean alkalinity primed the Earth system with a low level of atmospheric CO2 and a high ocean buffering capacity. The first phase of extinction was coincident with a slow injection of carbon into the atmosphere, and ocean pH remained stable. During the second extinction pulse, however, a rapid and large injection of carbon caused an abrupt acidification event that drove the preferential loss of heavily calcified marine biota. |
| doi_str_mv | 10.1126/science.aaa0193 |
| format | Article |
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| ispartof | Science (American Association for the Advancement of Science), 2015-04, Vol.348 (6231), p.229-232 |
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| source | American Association for the Advancement of Science; Jstor Complete Legacy; MEDLINE |
| subjects | Acidification Animals Aquatic Organisms Atmosphere Boron Buffers Carbon Carbon Cycle Carbon Isotopes Ecosystem Extinction, Biological Hydrogen-Ion Concentration Isotopes Marine Mass extinctions Oceans Oceans and Seas Sea water Seawater - chemistry Time Volcanic activity |
| title | Ocean acidification and the Permo-Triassic mass extinction |
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