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Extinctions: Living and Dying in the Margin of Error

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Are we now entering a mass extinction event? What can mass extinctions in Earth's history tell us about the Anthropocene? What do mass extinction events look like and how does life on Earth recover from them? The fossil record reveals periods when biodiversity exploded, and short intervals when much of life was wiped out in mass extinction events. In comparison with these ancient events, today's biotic crisis hasn't (yet) reached the level of extinction to be called a mass extinction. But we are certainly in crisis, and current parallels with ancient mass extinction events are profound and deeply worrying. Humanity's actions are applying the same sorts of pressures - on similar scales - that in the past pushed the Earth system out of equilibrium and triggered mass extinction events. Analysis of the fossil record suggests that we still have some time to avert this disaster: but we must act now.

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  • Humans are facing a major biotic crisis of our own making. Michael Hannah sets the current biodiversity crisis into the context of Earth history as told by the fossil record, helping readers fully appreciate the environmental crisis we face, and pointing the way we can avoid a mass extinction of our own creation
  • Explains the concept of the Earth System as the regulator of the planet's climate and the consequences that result from its failure
  • Emphasizes the importance of a diverse biosphere in maintaining the Earth System, and encourages the conservation of the planet's biota
  • Stresses the importance of mass extinctions in the history of life, telling readers how mass extinctions control both the level of the planet's biodiversity and the composition of its biota
  • Introduces the Anthropocene and emphasizes the damage that humans are doing to the Earth
Author: Hannah Michael
Publisher: CAMBRIDGE UNIVERSITY PRESS
Pages: 240
ISBN: 9781108843539
Cover: Hardback
Edition Number: 1
Release Year: 2021

Preface
Acknowledgements
Further reading
Introduction
1. The Anthropocene and the Earth system
2. A short detour: the fossil record and the geological time scale
3. The origin of animals and the emergence of the Earth system
4. Documenting ancient biodiversity
5. Mass extinctions – the basics
6. Causes of the End-Permian and End-Cretaceous extinction events
7. Time heals all – recovering from a mass extinction
8. The late Quaternary megafaunal extinctions
9. Surviving the Anthropocene
Further reading
Index.

Michael Hannah is Associate Professor in the School of Geography, Environment and Earth Sciences at Victoria University of Wellington in Aotearoa/New Zealand. He completed his PhD at Adelaide University, specialising in palaeontology and biostratigraphy (the art of dating rocks using fossils). After a brief stint in industry, he took up a position at Victoria University, where he became involved in two major Antarctic drilling projects, helping to decipher ancient changes in climate and the history of the Antarctic ice sheets. Throughout his career he has been fascinated by the story of the evolution of early life and the terrifying consequences of the mass extinctions that are evident in the fossil record.

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