It’s all about oxygen As animals, we have an absolute requirement for oxygen. Indeed, the history of life on Earth is likely intertwined with the history of atmospheric oxygen levels. But, how do we know about this? In particular, how do we know how oxygen levels have changed over time and how do we know how oxygen has impacted the evolution of life? In this talk, I will take you through some of the methods that we use to explore ancient oxygen levels and I will also describe how we explore the oxygen limits for life.
About Donald E. Canfield:
M.Phil. and Ph.D. Donald E. Canfield is a Professor of ecology at the Department of Biology and Head of the Research Unit at the Nordic Center for Earth Evolution (NordCEE) at SDU. Furthermore, Professor Donald E. Canfield is the former director of NordCEE, a center funded for 10 years by the Danish National Research Foundation. He is a member of the US National Academy of Sciences, the Royal Danish Academy of Sciences and Letters, and the Royal Swedish Academy of Science. He is a fellow of the Geochemical Society, the American Geophysical Union, the Society for Microbiology, and the American Academy for the Advancement of Science (AAAS). Professor Donald E. Canfield has won the Vladimir Vernadsky Award from the European Union of Geophysicists (EAG) and the Urey Prize from the European Association of Geochemistry (EAG), where he is also a member of the board. He was also awarded the title of Knight of the Order of the Dannebrog in 2021.
Professor Donald E. Canfield has been awarded a Docteur Honoris Causa from the University of Poitiers, and he is a member of the editorial board of the Proceedings of the National Academy of Sciences (PNAS). In addition to PNAS, he is on the editorial boards of Geobiology and the American Journal of Science.
Finally, Professor Donald E. Canfield has been on an ERC panel for Advanced Grants in geological sciences, where he also received funding from 2011-2016. In 2017 he was one of only 11 top researchers who got the grant and the title VILLUM Investigator, a program that is characterized by grants for scientists rather than for specific research projects.
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00:00 - Introduction
00:33 - It's All About Oxygen
01:23 - History of Atmospheric Oxygen
03:40 - The Rock Cycle
06:10 - Basics in Reconstructing Ancient Oxygen Levels
15:18 - Petrographic Carbon
17:48 - Animal Phylogeny
19:08 - Sponges and Oxygen
30:05 - Why Do They Do it?
33:45 - Questions From the Audience
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