Extinction and Radiation

Extinction and Radiation PDF

Author: J. David Archibald

Publisher: JHU Press

Published: 2011-03-15

Total Pages: 121

ISBN-13: 0801898056

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This study identifies the fall of dinosaurs as the factor that allowed mammals to evolve into the dominant tetrapod form. It refutes the single-cause impact theory for dinosaur extinction and demonstrates that multiple factors--massive volcanic eruptions, loss of shallow seas, and extraterrestrial impact--likely led to their demise. While their avian relatives ultimately survived and thrived, terrestrial dinosaurs did not. Taking their place as the dominant land and sea tetrapods were mammals, whose radiation was explosive following nonavian dinosaur extinction. The author argues that because of dinosaurs, Mesozoic mammals changed relatively slowly for 145 million years compared to the prodigious Cenozoic radiation that followed. Finally out from under the shadow of the giant reptiles, Cenozoic mammals evolved into the forms we recognize today in a mere ten million years after dinosaur extinction.

Mammals

Mammals PDF

Author: Thomas Stainforth Kemp

Publisher: Oxford University Press

Published: 2017

Total Pages: 169

ISBN-13: 0198766947

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Relative newcomers within the story of evolution, mammals are hugely successful and have colonized land, water, and air. Tom Kemp discusses the great diversity of mammalian species, and looks at how their very disparate characteristics, physiologies, and behaviours are all largely driven by one uniting factor: endothermy, or warm-bloodedness.

Scatter, Adapt, and Remember

Scatter, Adapt, and Remember PDF

Author: Annalee Newitz

Publisher: Anchor

Published: 2013-05-14

Total Pages: 333

ISBN-13: 0385535929

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In its 4.5 billion–year history, life on Earth has been almost erased at least half a dozen times: shattered by asteroid impacts, entombed in ice, smothered by methane, and torn apart by unfathomably powerful megavolcanoes. And we know that another global disaster is eventually headed our way. Can we survive it? How? As a species, Homo sapiens is at a crossroads. Study of our planet’s turbulent past suggests that we are overdue for a catastrophic disaster, whether caused by nature or by human interference. It’s a frightening prospect, as each of the Earth’s past major disasters—from meteor strikes to bombardment by cosmic radiation—resulted in a mass extinction, where more than 75 percent of the planet’s species died out. But in Scatter, Adapt, and Remember, Annalee Newitz, science journalist and editor of the science Web site io9.com explains that although global disaster is all but inevitable, our chances of long-term species survival are better than ever. Life on Earth has come close to annihilation—humans have, more than once, narrowly avoided extinction just during the last million years—but every single time a few creatures survived, evolving to adapt to the harshest of conditions. This brilliantly speculative work of popular science focuses on humanity’s long history of dodging the bullet, as well as on new threats that we may face in years to come. Most important, it explores how scientific breakthroughs today will help us avoid disasters tomorrow. From simulating tsunamis to studying central Turkey’s ancient underground cities; from cultivating cyanobacteria for “living cities” to designing space elevators to make space colonies cost-effective; from using math to stop pandemics to studying the remarkable survival strategies of gray whales, scientists and researchers the world over are discovering the keys to long-term resilience and learning how humans can choose life over death. Newitz’s remarkable and fascinating journey through the science of mass extinctions is a powerful argument about human ingenuity and our ability to change. In a world populated by doomsday preppers and media commentators obsessively forecasting our demise, Scatter, Adapt, and Remember is a compelling voice of hope. It leads us away from apocalyptic thinking into a future where we live to build a better world—on this planet and perhaps on others. Readers of this book will be equipped scientifically, intellectually, and emotionally to face whatever the future holds.

Major Evolutionary Radiations

Major Evolutionary Radiations PDF

Author: Paul D. Taylor

Publisher: Clarendon Press

Published: 1990

Total Pages: 464

ISBN-13:

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This unique volume takes a close look at patterns of evolutionary change responsible for the astounding diversity of life and the major radiations seen in many taxonomic groups. Evidence from the fossil record shows that this process has not occurred at an even rate. Rather, relatively short but highly active periods of evolution have yielded the multiplication of species and morphological divergences, such as the emergence of flowering plants during the late Cretaceous. The contributors to this work, all recognized authorities in their fields, discuss general aspects of major radiations, and then focus on evolution in taxonomic groups with ample fossil records. The book is an important complement to the literature of extinction and paleontology, and will be read with interest by paleontologists and evolutionary biologists alike.

Events of Increased Biodiversity

Events of Increased Biodiversity PDF

Author: Pascal Neige

Publisher: Elsevier

Published: 2015-05-14

Total Pages: 152

ISBN-13: 0081004745

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The fossil record offers a surprising image: that of evolutionary radiations characterized by intense increases in cash or by the sudden diversification of a single species group, while others stagnate or die out. In a modern world, science carries an often pessimistic message, surrounded by studies of global warming and its effects, extinction crisis, emerging diseases and invasive species. This book fuels frequent "optimism" of the sudden increase in biodiversity by exploring this natural phenomenon. Events of Increased Biodiversity: Evolutionary Radiations in the Fossil Record explores this natural phenomenon of adaptive radiation including its effect on the increase in biodiversity events, their contribution to the changes and limitations in the fossil record, and examines the links between ecology and paleontology’s study of radiation. Details examples of evolutionary radiations Explicitly addresses the effect of adaptation driven by ecological opportunity Examines the link between ecology and paleontology’s study of adaptive radiation

Handbook of Paleoanthropology

Handbook of Paleoanthropology PDF

Author: Winfried Henke

Publisher: Springer Science & Business Media

Published: 2007-05-10

Total Pages: 2057

ISBN-13: 3540324747

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This 3-volume handbook brings together contributions by the world ́s leading specialists that reflect the broad spectrum of modern palaeoanthropology, thus presenting an indispensable resource for professionals and students alike. Vol. 1 reviews principles, methods, and approaches, recounting recent advances and state-of-the-art knowledge in phylogenetic analysis, palaeoecology and evolutionary theory and philosophy. Vol. 2 examines primate origins, evolution, behaviour, and adaptive variety, emphasizing integration of fossil data with contemporary knowledge of the behaviour and ecology of living primates in natural environments. Vol. 3 deals with fossil and molecular evidence for the evolution of Homo sapiens and its fossil relatives.

The Sixth Extinction

The Sixth Extinction PDF

Author: Elizabeth Kolbert

Publisher: Henry Holt and Company

Published: 2014-02-11

Total Pages: 336

ISBN-13: 0805099794

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ONE OF THE NEW YORK TIMES BOOK REVIEW'S 10 BEST BOOKS OF THE YEAR A major book about the future of the world, blending intellectual and natural history and field reporting into a powerful account of the mass extinction unfolding before our eyes Over the last half a billion years, there have been five mass extinctions, when the diversity of life on earth suddenly and dramatically contracted. Scientists around the world are currently monitoring the sixth extinction, predicted to be the most devastating extinction event since the asteroid impact that wiped out the dinosaurs. This time around, the cataclysm is us. In The Sixth Extinction, two-time winner of the National Magazine Award and New Yorker writer Elizabeth Kolbert draws on the work of scores of researchers in half a dozen disciplines, accompanying many of them into the field: geologists who study deep ocean cores, botanists who follow the tree line as it climbs up the Andes, marine biologists who dive off the Great Barrier Reef. She introduces us to a dozen species, some already gone, others facing extinction, including the Panamian golden frog, staghorn coral, the great auk, and the Sumatran rhino. Through these stories, Kolbert provides a moving account of the disappearances occurring all around us and traces the evolution of extinction as concept, from its first articulation by Georges Cuvier in revolutionary Paris up through the present day. The sixth extinction is likely to be mankind's most lasting legacy; as Kolbert observes, it compels us to rethink the fundamental question of what it means to be human.

Dinosaur Extinction and the End of an Era

Dinosaur Extinction and the End of an Era PDF

Author: J. David Archibald

Publisher:

Published: 1996

Total Pages: 260

ISBN-13: 9780231076258

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Broadening the basis of information on the topic of the Cretaceous extinction, this book particularly highlights evidence that points away from the global catastrophic scenario, towards a fossil based theory suggesting that a multitude of factors resulted in the period's radical changes.

Radiation Nation

Radiation Nation PDF

Author: Natasha Zaretsky

Publisher: Columbia University Press

Published: 2018-02-13

Total Pages: 316

ISBN-13: 0231542488

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On March 28, 1979, the worst nuclear reactor accident in U.S. history occurred at the Three Mile Island power plant in Central Pennsylvania. Radiation Nation tells the story of what happened that day and in the months and years that followed, as local residents tried to make sense of the emergency. The near-meltdown occurred at a pivotal moment when the New Deal coalition was unraveling, trust in government was eroding, conservatives were consolidating their power, and the political left was becoming marginalized. Using the accident to explore this turning point, Natasha Zaretsky provides a fresh interpretation of the era by disclosing how atomic and ecological imaginaries shaped the conservative ascendancy. Drawing on the testimony of the men and women who lived in the shadow of the reactor, Radiation Nation shows that the region's citizens, especially its mothers, grew convinced that they had sustained radiological injuries that threatened their reproductive futures. Taking inspiration from the antiwar, environmental, and feminist movements, women at Three Mile Island crafted a homegrown ecological politics that wove together concerns over radiological threats to the body, the struggle over abortion and reproductive rights, and eroding trust in authority. This politics was shaped above all by what Zaretsky calls "biotic nationalism," a new body-centered nationalism that imagined the nation as a living, mortal being and portrayed sickened Americans as evidence of betrayal. The first cultural history of the accident, Radiation Nation reveals the surprising ecological dimensions of post-Vietnam conservatism while showing how growing anxieties surrounding bodily illness infused the political realignment of the 1970s in ways that blurred any easy distinction between left and right.

In the Light of Evolution

In the Light of Evolution PDF

Author: National Academy of Sciences

Publisher: National Academies Press

Published: 2017-01-01

Total Pages: 433

ISBN-13: 0309444225

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Biodiversity-the genetic variety of life-is an exuberant product of the evolutionary past, a vast human-supportive resource (aesthetic, intellectual, and material) of the present, and a rich legacy to cherish and preserve for the future. Two urgent challenges, and opportunities, for 21st-century science are to gain deeper insights into the evolutionary processes that foster biotic diversity, and to translate that understanding into workable solutions for the regional and global crises that biodiversity currently faces. A grasp of evolutionary principles and processes is important in other societal arenas as well, such as education, medicine, sociology, and other applied fields including agriculture, pharmacology, and biotechnology. The ramifications of evolutionary thought also extend into learned realms traditionally reserved for philosophy and religion. The central goal of the In the Light of Evolution (ILE) series is to promote the evolutionary sciences through state-of-the-art colloquia-in the series of Arthur M. Sackler colloquia sponsored by the National Academy of Sciences-and their published proceedings. Each installment explores evolutionary perspectives on a particular biological topic that is scientifically intriguing but also has special relevance to contemporary societal issues or challenges. This tenth and final edition of the In the Light of Evolution series focuses on recent developments in phylogeographic research and their relevance to past accomplishments and future research directions.