CEES Seminar

[Natalie Campbell]

The CEES Seminar Series presents:

*Dr. Emma Kast, *University of Cambridge, Department of Earth Sciences


*Cenozoic megatooth sharks occupied extremely high trophic positions*



This talk will explore how nitrogen isotopes measured in fossil teeth can
reveal where extinct animals sat in the food web. We will dive into the
world of Cenozoic sharks, focusing on the megatooth sharks (genus Otodus),
including the giant Otodus megalodon (> 15 m), which went extinct about 3.5
million years ago. Exceptionally high nitrogen isotope values in O.
megalodon suggest it occupied a higher trophic level than any known marine
species, living or extinct, and the record also indicates a dietary shift
in the lineage, with peak trophic level reached before maximum body size
for the megatooth sharks.



*Friday April 3,**  3:30**pm. *
*Hudson 106*
*Reception prior to the talk at 3:00*

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