Explore the fascinating oxygen fluctuations during the Paleozoic Era in this 25-minute video lecture. Delve into the timing, extent, geochemical evidence, and biological implications of these atmospheric and oceanic changes. Learn about carbon isotope excursions, redox-sensitive trace elements, and the role of land plant evolution in increasing oxygen levels. Discover how the Devonian oxidation event coincided with the development of the first forests and how sponges may have contributed to ocean oxygenation. Examine the potential Cambrian deoxygenation event and its effects on marine life. Gain insights into how oxygen levels influenced biodiversity, the 'age of fish,' and reef development throughout the Paleozoic. Conclude with a comprehensive summary of Earth's oxygenation history and enjoy some lighthearted bloopers at the end.
Early Paleozoic Oxygen History - Evidence and Reasons for Paleozoic Oxygen Fluctuations
Overview
Syllabus
Neoproterozoic Recap
Paleozoic O2 fluctuations ramifications
Biodiversity correlates with O2 fluctuations
Mo evidence for a Devonian oxidation event DOE
Ce evidence for the DOE
Ce correlates with O2 through Paleozoic
How animals & plants were affected
Land plant evolution increased O2?
How soil formation oxidized Earth
Was there a Cambrian deoxygenation event CDE?
C evidence for Cambrian deoxygenation
How was O2 in the ocean affected?
The 'age of fish' due to O2 rise?
How reefs were affected by the O2 changes
Cambrian to Devonian biodiversity and O2 evolution
Earth oxygenation summary
Bloopers!
Taught by
GEO GIRL
