HORSESHOE-CRABS-AND-VELVET-WORMS

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Horseshoe Crabs And Velvet Worms

Author : Richard A. Fortey
ISBN : 0307263614
Genre : Nature
File Size : 88.40 MB
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Presents a narrative tour of what living creatures reveal about the history of evolution, demonstrating how various organisms and ecosystems that survive from earlier periods reflect seminal events.
Category: Nature

Catch And Release

Author : Lisa Jean Moore
ISBN : 9781479848096
Genre : Social Science
File Size : 58.12 MB
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The unexpected and fascinating interspecies relationship between humans and horseshoe crabs. Horseshoe crabs are considered both a prehistoric and indicator species. They have not changed in tens of millions of years and provide useful data to scientists who monitor the health of the environment. From the pharmaceutical industry to paleontologists to the fishing industry, the horseshoe crab has made vast, but largely unknown, contributions to human life and our shared ecosystem. Catch and Release examines how these intersections steer the trajectory of both species’ lives, and futures. Based on interviews with conservationists, field biologists, ecologists, and paleontologists over three years of fieldwork on urban beaches, noted ethnographer Lisa Jean Moore shows how humans literally harvest the life out of the horseshoe crabs. We use them as markers for understanding geologic time, collect them for agricultural fertilizer, and eat them as delicacies, capture them as bait, then rescue them for conservation, and categorize them as endangered. The book details the biomedical bleeding of crabs; how they are caught, drained of 40% of their blood, and then released back into their habitat. The model of catch and release is essential. Horseshoe crabs cannot be bred in captivity and can only survive in their own ecosystems. Moore shows how horseshoe crabs are used as an exploitable resource, and are now considered a “vulnerable” species. An investigation of how humans approach animals that are essential for their survival, Catch and Release questions whether humans should have divine, moral, or ethical claims to any living being in their path.
Category: Social Science

The Future Of Life On Earth

Author : Michael Bright
ISBN : 9781406232622
Genre : Biodiversity
File Size : 60.49 MB
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Explains how many of the living things on Earth are still to be found and described, as well as things that affect biodiversity and what our world might look like in years to come. Looks at ways that human activity is affecting biodiversity and how that may play out in the future of life on Earth based on past instances of mass extinction, and also looks forward to the time when the Sun will no longer support life on the planet.
Category: Biodiversity

21st Century Geography

Author : Joseph P. Stoltman
ISBN : 9781412974646
Genre : Science
File Size : 26.51 MB
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This is a theoretical and practical guide on how to undertake and navigate advanced research in the arts, humanities and social sciences.
Category: Science

Survivors The Animals And Plants That Time Has Left Behind Text Only

Author : Richard Fortey
ISBN : 9780007441389
Genre : Science
File Size : 38.89 MB
Format : PDF
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This ebook edition does not include illustrations. An awe-inspiring journey through the eons and across the globe, in search of visible traces of evolution in the living creatures which have survived from earlier times and whose stories speak to us of seminal events in the history of life.
Category: Science

Kingdoms Of Life Animals Ebook

Author : Gina Hamilton
ISBN : 9780787783365
Genre : Nature
File Size : 42.19 MB
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Milliken's Kingdoms of Life series is aligned with national science standards and reflects current teaching practices. Each book includes approximately 50 black and white reproducible pages, 12 full-color transparencies (print books) or PowerPoint slides (eBooks), comprehension questions and lab activities for each unit, an answer key, a glossary of bolded terms, a timeline of biological discovery, a laboratory safety guide, as well as a national standards correlation chart. Animals details the anatomy and behavior of the kingdom with the greatest cellular complexity. It includes both many-celled and single-celled organisms (such as protozoans). Animals differ from plants in having cells without cellulose walls, in lacking chlorophyll and the capacity for photosynthesis, in requiring more complex food materials (as proteins), in being organized to a greater degree of complexity, and in having the capacity for spontaneous movement and rapid motor responses to stimulation.
Category: Nature

Evolution

Author : Donald R. Prothero
ISBN : 9780231511421
Genre : Science
File Size : 33.41 MB
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Over the past twenty years, paleontologists have made tremendous fossil discoveries, including fossils that mark the growth of whales, manatees, and seals from land mammals and the origins of elephants, horses, and rhinos. Today there exists an amazing diversity of fossil humans, suggesting we walked upright long before we acquired large brains, and new evidence from molecules that enable scientists to decipher the tree of life as never before. The fossil record is now one of the strongest lines of evidence for evolution. In this engaging and richly illustrated book, Donald R. Prothero weaves an entertaining though intellectually rigorous history out of the transitional forms and series that dot the fossil record. Beginning with a brief discussion of the nature of science and the "monkey business of creationism," Prothero tackles subjects ranging from flood geology and rock dating to neo-Darwinism and macroevolution. He covers the ingredients of the primordial soup, the effects of communal living, invertebrate transitions, the development of the backbone, the reign of the dinosaurs, the mammalian explosion, and the leap from chimpanzee to human. Prothero pays particular attention to the recent discovery of "missing links" that complete the fossil timeline and details the debate between biologists over the mechanisms driving the evolutionary process. Evolution is an absorbing combination of firsthand observation, scientific discovery, and trenchant analysis. With the teaching of evolution still an issue, there couldn't be a better moment for a book clarifying the nature and value of fossil evidence. Widely recognized as a leading expert in his field, Prothero demonstrates that the transformation of life on this planet is far more awe inspiring than the narrow view of extremists.
Category: Science

When The Invasion Of Land Failed

Author : George R. McGhee Jr.
ISBN : 9780231536363
Genre : Science
File Size : 89.42 MB
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The invasion of land by ocean-dwelling plants and animals was one of the most revolutionary events in the evolution of life on Earth, yet the animal invasion almost failed—twice—because of the twin mass extinctions of the Late Devonian Epoch. Some 359 to 375 million years ago, these catastrophic events dealt our ancestors a blow that almost drove them back into the sea. If those extinctions had been just a bit more severe, spiders and insects—instead of vertebrates—might have become the ecologically dominant forms of animal life on land. This book examines the profound evolutionary consequences of the Late Devonian extinctions and the various theories proposed to explain their occurrence. Only one group of four-limbed vertebrates exists on Earth, while other tetrapod-like fishes are extinct. This gap is why the idea of "fish with feet" seems so peculiar to us, yet such animals were once a vital part of our world, and if the Devonian extinctions had not happened, members of these species, like the famous Acanthostega and Ichthyostega, might have continued to live in our rivers and lakes. Synthesizing decades of research and including a wealth of new discoveries, this accessible, comprehensive text explores the causes of the Devonian extinctions, the reasons vertebrates were so severely affected, and the potential evolution of the modern world if the extinctions had never taken place.
Category: Science

Atlas Of Life On Earth

Author : Dougal Dixon
ISBN : 0760719578
Genre : Science
File Size : 87.73 MB
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Category: Science

The Biotic World And Man

Author : Lorus Johnson Milne
ISBN : WISC:89043249184
Genre : Biologia
File Size : 20.59 MB
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Category: Biologia