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\nHow Many Mass Extinctions Have There Been?\n

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\n\nPublisher:\n\nMinuteEarth\n\n\n
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\nThanks to Audible for supporting this video. Get your free 30-day trial at Thanks also to our Patreon patrons: Today I Found Out, Maarten Bremer, Mark Roth, Jeff Straathof, Tony Fadell, Ahmed, Muhammad Shifaz, Vidhya Krishnaraj, Luka...\nThanks to Audible for supporting this video. Get your free 30-day trial at Thanks also to our Patreon patrons: Today I Found Out, Maarten Bremer, Mark Roth, Jeff Straathof, Tony Fadell, Ahmed, Muhammad Shifaz, Vidhya Krishnaraj, Luka Leskovsek, Duhilio Patino, Alberto Bortoni, Valentin, Nicholas Buckendorf, and Antoine Coeur ___________________________________________ Want to learn more about the topic in this week’s video? Here are some keywords/phrases to get your googling started: – Mass Extinction Event: a significant, global decrease in the diversity of life – \"Big 5\": The five biggest mass extinction events since the Cambrian explosion of Life 550 million years ago – Biodiversity Crisis: Like a mass extinction, a biodiversity crisis is a marked depletion in diversity in the fossil record. Some scientists prefer to call the late-Devonian extinction a \"biodiversity crisis\" because a lack of speciation contributed to the loss in diversity just as much as extinction did. – Diversity curve: A line chart that shows the diversity of life (usually by genera, but sometimes by species or family) over time – Lagerstatte: a deposit of sedimentary rock that contains a profound number of fossils, often with excellent preservation – Shareholder Quorum Subsampling: A statistical method that corrects for some of the biases in the fossil record, allowing scientists to generate more accurate diversity curves ___________________________________________ Credits: Script Writer: Emily Elert (twitter:@eelert) Script Editor: Kate Yoshida (twitter:@KateYoshida) Video Illustrator: Ever Salazar (twitter:@eversalazar) Video Director: Emily Elert (twitter:@eelert) With Contributions From: Henry Reich (twitter:@minutephysics), Alex Reich (twitter:@alexhreich), Peter Reich Music by: Nathaniel Schroeder _________________________________________ Like our videos? Subscribe to MinuteEarth on YouTube And for exclusive early access to all our videos, sign up with Vessel Already subscribed? Help us keep making MinuteEarth by supporting us on Patreon Also, say hello on: Facebook Twitter And find us on itunes ________________________ References: Alroy, J. (2015). Personal Communication. Alroy, J. (2008). Dynamics of origination and extinction in the marine fossil record. Proceedings of the National Academy of Sciences, 11536-11542. Retrieved April 8, 2015, from Alroy, J. (n.d.). Accurate and precise estimates of origination and extinction rates. Paleobiology, 40(3), 374-397. Retrieved September 20, 2015, from Benton, M. (2003). When life nearly died: The greatest mass extinction of all time. New York: Thames & Hudson. Barrett, Paul M. (2015). Personal Communication. Fossilworks: Gateway to the Paleobiology Database. Lloyd, GT, Smith, AB and Young, JR, (2011). Quantifying the deep-sea rock and fossil record bias using coccolithophores. Geological Society Special Publication, 358 (1), 167-177. Mcghee, G., Clapham, M., Sheehan, P., Bottjer, D., & Droser, M. (2013). A new ecological-severity ranking of major Phanerozoic biodiversity crises. Palaeogeography, Palaeoclimatology, Palaeoecology, 370, 260-270. Raup, D. (1979). Biases in the fossil record of species and genera. Bulletin of the Carnegie Museum of Natural History 13: 85–91. Raup, D., & Sepkoski, J. (1982). Mass Extinctions in the Marine Fossil Record. Science, 215(4539), 1501-1503. Vermeij, GJ. (2015). Personal Communication.\n
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Grade
12th - Higher Ed
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Science
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Source:
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2016
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