Biodiversity Crisis: Losing What Counts

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The fastest mass extinction of species in Earth's history, intriguingly explored in an illustrated companion to the American Museum of Natural History's permanent exhibit. The Biodiversity Crisis offers general audiences a clear understanding of the current threat to life on Earth posed by the fastest mass extinction in Earth's history, which has taken place over the last five hundred years. Unlike prior extinctions, this one is clearly a direct result of human activity, not of natural phenomena. Yet the public ...
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Overview

The fastest mass extinction of species in Earth's history, intriguingly explored in an illustrated companion to the American Museum of Natural History's permanent exhibit. The Biodiversity Crisis offers general audiences a clear understanding of the current threat to life on Earth posed by the fastest mass extinction in Earth's history, which has taken place over the last five hundred years. Unlike prior extinctions, this one is clearly a direct result of human activity, not of natural phenomena. Yet the public remains unaware of the crisis in sustaining biodiversity—the variety and interdependence of all living things on Earth. Published in conjunction with the American Museum of Natural History, whose major Hall of Biodiversity recently opened to great acclaim, the book defines biodiversity, demonstrates its importance to life as we know it, and presents strategies and solutions, including what we can do in our own homes and communities, for stopping the escalating rate of species' extinction. It combines essays by experts including E. O. Wilson, Niles Eldredge, and Peter Raven; profiles of naturalists such as Jane Goodall; and case studies. Engaging and accessible, The Biodiversity Crisis presents the best scientific thinking in language and images that we can all understand, and is illustrated with photographs and drawings and supplemented with a resource section and a glossary of key terms. Black-and-white photographs and illustrations throughout.

The New Press is pleased to announce the publication of this new title with the American Museum of Natural History, a collaboration that began with the publication of Epidemic! in 2000.

Founded in 1869, the American Museum of Natural History in New York City is one of the world's preeminent institutions for scientific research and education, visited by more than four million people annually. Three new titles, Earth, The Biodiversity Crisis, and Cosmic Horizons, are companion volumes to three major new permanent exhibitions at the museum: the David S. and Ruth L. Gottesman Hall of Planet Earth, the Hall of Biodiversity, and the Frederick Phineas and Sandra Priest Rose Center for Earth and Space.

Author Biography: Dr. Michael Novacek is senior vice president and provost of science at the American Museum of Natural History. He is also the curator of the Department of Vertebrate Paleontology, and is a specialist on fossil mammals.

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Editorial Reviews

KLIATT
This is another title in the attractive American Museum of Natural History series on science. It addresses the crucial biodiversity issue in a straightforward, readable and encompassing format, from "What's This Biodiversity and What's It Done for Us Today?" to the nitty-gritty of deforestation, extinctions past and present, and solutions for saving biodiversity. A different specialist writes each chapter. It is well illustrated with good photographs, drawings and graphs. It would make a good supplementary textbook or stand well as a resource for a high school science student, but any lay reader with an interest in this area will find something of interest. The mini-case studies (such as "Reefs in Crisis" and "The Green Guerrillas, New York City") and personal profiles of scientists and activists are an added attraction to this well-rounded and informative book. Recommended for all libraries. KLIATT Codes: SA—Recommended for senior high school students, advanced students, and adults. 2001, Norton, The New Press, 221p. illus., $19.95. Ages 16 to adult. Reviewer: Katherine E. Gillen; Libn., Luke AFB Lib., AZ , September 2001 (Vol. 35 No. 5)
Library Journal
This illustrated companion to the American Museum of Natural History's new Hall of Biodiversity features essays by writers with good credentials such as Edward O. Wilson, who attempt to help the general reader understand what is meant by "biodiversity" and why it is important. In doing so, they place a dollar value on the plants and animals in crisis, citing benefits such as ecotourism and anti-cancer drugs. These are, however, emotional and economic issues, not science. While some articles offer some scientific truth--Niles Eldredge's essay on extinction provides a rational explanation of the difference between the five mass extinctions of the past and the alleged current one brought on by humans--the underlying message is that "human influence is bad for all ecosystems; we're killing everything." The only solutions proposed here are warm, fuzzy ones that don't address the biggest factor in the biodiversity crisis, human overpopulation. Richard Fortey's Life (LJ 4/1/98) provides a better description of extinctions and their effects on future species. Recommended for larger collections that include scientific explanations and rationales.--Mary J. Nickum, Lakewood, CO Copyright 2000 Cahners Business Information.\
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Product Details

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Chapter One


Section One: What Have We Lost, What Are We Losing

Introduction MICHAEL NOVACEK


When it comes to biodiversity, ignorance is not bliss. In this section we acknowledge the depth of our ignorance about life on this planet. Yet enough is known to indicate life in crisis. The authors cast the ongoing loss of habitats and species in dire terms, on a scale comparable to the mass extinctions of the past. It is as normal for species to become extinct as it is for new species to evolve. Both the rates of evolution and extinction of species are relatively low. In periods of mass extinction, it is the increased rate of extinction that is significant. For example, Norman Myers claims that the current rate of species loss is probably 10,000 times greater than that of the background extinction rate, or the normal extinction rate. It is also possible to identify in many dimensions just what we are losing, namely, the enormous benefits of biological diversity in terms of ecosystem services, products for human health and consumption, and enhancement of the quality of life in both economic and aesthetic terms. As Edward O. Wilson notes in the opening essay of this section, wild species are the source of forty percent of our medicines, and all species offer unique insights to science. Indeed, as Francesca T. Grifo emphasizes, biodiversity is not only a priceless source of pharmaceuticals, it is critical to maintaining safe water supplies and controlling disease-causing organisms. The integral importance of millions of species to maintaining processes essential forlife—control of toxins and harmful microbes, soil decomposition, and recycling of nutrients and atmospheric gases—is a recurrent theme in essays by Norman Myers, Paul R. Ehrlich and Simon A. Levin, and Peter H. Raven. It should be remembered, however, that the benefit of a given ecosystem is not simply a function of how many species live in a particular region. David Ehrenfield vividly describes the unspoiled Soper Valley in Baffin Island, Canada, which remains an environment with its "... own kind of grandeur and glory, a living presence that surely makes an equally powerful claim on our care and affection," despite the low number of species.

    Ignoring, or irresponsibly exploiting, these benefits—medicinal, economic, or aesthetic—has drastic effects. Robert Repetto explains why unsustainable logging practices not only create unnecessary waste of trees and other forest products, but also increase greenhouse gases through burning of huge tracts of tropical forests. Thus loss of species does not only translate to loss of valuable natural habitat; as Peter Raven notes, this crisis threatens the basic physical system of the planet, involving the recycling of chemicals in the soil, oceans, and atmosphere. As all the contributors stress, one way to mitigate the massive degradation and destruction of habitats is to infuse conservation action with fundamental scientific discovery. Thomas Eisner describes developments in molecular biology and biochemistry that help scientists identify chemicals that are used by species in defense against predators and other adaptations. Chemical substances once discovered can be used in their natural state or can provide a model for synthesized compounds. The current range of such chemical applications is impressive and the potentials for chemical exploration of the biosphere are extraordinary. Such work puts a tangible value on biodiversity in terms of human need, and moves us from short-term, indiscriminate harvesting of habitats toward bio- exploration and sustainable harvesting of new products. Science must set the framework for such sustainable programs. For example, comprehensive scientific data on population sizes and viability in species of ocean fishes and other marine life can identify both good and bad management, as effectively shown in the Audubon Guide to Seafood compiled by Carl Safina. The contributors to this section as well as the scientists, artists, and educators profiled have dedicated their careers to the advocacy of sound, scientifically based conservation of biodiversity. It is hoped that their words will inspire future generations of biodiversity scientists as well as policy makers.


Why is biodiversity in crisis?


In a careful examination of these questions, the authors describe the current biodeversity crisis and assert the need to protect species and ecosystems for the health of the planet and our own health and well-being, including an aesthetic appreciation of the natural world.


Biodiversity:
Wildlife in Trouble

EDWARD O. WILSON


Around the world, biodiversity—defined as the full variety of life, from genes to species to ecosystems—is in trouble. Not a week goes by without reports of the imminent end of one species or another. For every celebrity animal that vanishes, biologists can point to thousands of species of plants and smaller animals either recently extinct or on the brink.

    There is not one country, not one biome and its plant and animal life— mountain, desert, or ocean—that remains untouched. The rarest bird in the world, the Spix's macaw, is down to one or possibly two individuals in the palm and river-edge forests of central Brazil. The rarest plant is Cooke's kokio of Hawaii, a small tree with orange-red flowers that once lived on the dry volcanic slopes of Molokai. Today it exists only as a few half plants— branches grafted onto the stocks of other related plants. Despite the best efforts of scientists to save the plant, no branches planted in soil have sprouted roots.

    It is difficult to estimate overall rates of extinction. However, biologists generally agree that on the land, at least, and on a worldwide basis, species are vanishing one hundred times faster than before the arrival of humans. The world's flora and fauna are paying the price of humanity's population growth.

    Biodiversity is in serious trouble. Responding to the problem, conservation experts have shifted their focus in the past twenty years from individual plant and animal groups (species) to entire threatened habitats, whose destruction would cause the extinction of many species. Such "hot spots" have become the focus of conservation efforts. The logic of the experts is simple: By concentrating conservation efforts on such areas, we can save the largest amount of biodiversity at the lowest economic cost. The outright elimination of habitats is the leading cause of extinction. But the introduction of exotic species and the diseases they carry follows close behind in destructiveness, along with overhunting or overharvesting of plants and animals. All these factors work together in a complex manner. When asked which ones caused the extinction of any particular species, biologists are likely to give the Murder on the Orient Express answer: They all did it. A common sequence in tropical countries starts with the building of roads into wilderness. Land-seeking settlers pour in, clear the rain forest on both sides of the road, pollute the streams, introduce alien plants and animals, and hunt wildlife for extra food. Many native species become rare, and some disappear entirely.

    People commonly respond to the evidence of species extinction by entering three stages of denial. The first is, simply: Why worry? Extinction is natural. Species have been dying out for billions of years without permanent damage. Evolution has always replaced extinct species with new ones.

    These statements are true—but with a terrible twist. After each of the four greatest environmental disruptions that occurred during the past 400 million years, evolution needed about ten million years to restore Earth's biodiversity. Worse, evolution will be even slower if natural environments have been crowded out by artificial ones. Faced with such a long waiting time, aware that we have inflicted so much damage in a single lifetime, our descendants are going to be—how best to say it?—peeved with us.

    Entering the second stage of denial, people ask: Why do we need so many species anyway? Why care, especially since the vast majority are bugs, weeds, and fungi?

    It is easy to dismiss the creepy crawlies of the world. However, the value of the little things in the natural world has become extremely clear. Recent experimental studies on whole ecosystems support what ecologists have long suspected: The more species living in an ecosystem, the higher its productivity and the greater its ability to withstand drought and other kinds of environmental strain. Because we depend on working ecosystems to cleanse our water, enrich our soil, and create the very air we breathe, biodiversity is clearly not something to discard carelessly.

    Besides creating a livable environment, wild species are the source of products that help support our lives. More than forty percent of all prescription medicines used by Americans are substances originally extracted from plants, animals, fungi, and microorganisms. Aspirin, for example, the most widely used medicine in the world, was originally derived from the willow tree.

    Every species on Earth is a masterpiece of evolution, offering a vast source of useful scientific knowledge because it is so thoroughly adapted to the environment in which it lives.

    Even when that much is granted, the third stage of denial usually emerges: Why rush to save all the species right now? We have more important things to do. Why not keep live specimens in zoos and botanical gardens and return them to the wild later?

    The grim truth is that all the zoos in the world today can hold a maximum of only 2,000 species of mammals, birds, reptiles, and amphibians, out of about 24,000 known to exist. The world's botanical gardens would be even more overwhelmed by the quarter million plant species. To add to the difficulty, no one has come up with a plan to save all the insects, fungi, and other ecologically vital small organisms. And even when scientists are finally ready to return species to independence, the ecosystems in which many live will no longer exist. The conclusion of scientists and conservationists is practically unanimous: The only way to save wild species is to maintain them in their natural habitats. Considering how rapidly such habitats are shrinking, even that straightforward solution will be an overwhelming task.

    In spite of all these difficulties, there is reason for some optimism. With appropriate measures and the will to use them, the destruction can be slowed, perhaps eventually halted, and most of the surviving species saved. Some of the most important steps that can be taken are outlined in the Convention on Biological Diversity signed by 156 nations and the European Union at the 1992 Earth Summit in Rio de Janeiro. The convention was the turning point in the awareness of biodiversity as a world issue. Besides speeding up conservation efforts, the convention awakened many tropical countries, where biological diversity is both the richest and the most threatened.

    The new approach to biodiversity preservation, uniting conservation and economic development, is not perfect, and it is not yet fully practiced in any country. But it is a promising start. Some of the test projects have succeeded dramatically. They offer a way out of what will otherwise be a biologically barren future. With the world population at six billion and sure to keep on growing rapidly, humanity has entered a dangerous environmental bottleneck. We hope-surely we must believe-that our species will come out the other side in better condition than when we entered. We should make it a goal to take as much of the rest of life with us as is humanly possible.


In what ways can the economic stability of a highly diversified corporation be compared to the ecological stability of an ecosystem with a high degree of biodiversity?


Over forty percent of all prescription medicines used by North Americans are from substances originally extracted from the world's biodiversity. Find out what some of these medicines are and where they come from.

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Table of Contents

Foreword 9
Acknowledgments 10
Preface: Biodiversity 12
Sect. 1 What Have We Lost, What Are We Losing?
Introduction 16
Biodiversity: Wildlife in Trouble 18
Profile: Abebe Getahun 21
What's This Biodiversity and What's It Done for Us Today? 22
Case Study: The Audubon Guide to Seafood 27
Deforestation in the Tropics 32
Biodiversity and Human Health 40
Profile: Kevin Browngoehl 45
Biodiversity: What It Is and Why We Need It 46
Hot Spots 50
Case Study: The Green Guerillas, New York City 55
What Have We Lost, What Are We Losing? 58
Profile: Amy Vedder 63
Chemical Prospecting: The New Natural History 64
Profile: Dolores R. Santoliquido 71
Sect. 2 Extinctions Past and Present
Introduction 74
Evolution, Extinction, and Humanity's Place in Nature 76
Case Study: St. Lucia Parrot Recovery 81
Profile: Clare Flemming 83
The 40,000-Year Plague: Humans, Hyperdisease, and First-Contact Extinctions 84
Prehistoric Extinctions and Ecological Changes on Oceanic Islands 90
Case Study: Brown-Eyed, Milk-Giving ... and Extinct: Losing Mammals Since A.D. 1500 95
Global Warming, Loss of Habitat, and Pollution: Introduction to "Thompson's Ice Corps," "Nest Gains, Nest Losses," and "Hormonal Sabotage" 100
Thompson's Ice Corps 106
Nest Gains, Nest Losses 112
Case Study: Lake Victoria 117
Hormonal Sabotage 120
Case Study: Reefs in Crisis 127
Sect. 3 Saving Biodiversity: Strategies and Solutions
Introduction 132
The New Geologic Force: Man 134
Profile: Jane Goodall 139
Case Study: Humpback Whale Conservation Genetics Project, Madagascar 141
Conservation Biology and Wildlife Management in America: A Historical Perspective 144
Profile: Jaime A. Pinkham 149
Managing the Biosphere: The Essential Role of Systematic Biology 150
Case Study: Wilderness Preservation Act, U.S.A. 155
How to Grow a Wildland: The Gardenification of Nature 156
Case Study: The Belize Ethnobotany Reserve Project 163
Profile: Penelope Bodry-Sanders 165
The Economic Value of Earth's Resources 166
Profile: Michael Balick 175
Case Study: Jaguars 177
Strategies and Solutions: Mapping the Biodiversity 180
Community-Based Approaches for Combining Conservation and Development 184
Case Study: Restoration of the Elwha River by Dam Removal, Washington 189
No Free Lunch in the Rain Forest 192
About the Hall of Biodiversity 197
Resources 202
About the American Museum of Natural History 206
Contributors 207
Credits 215
Glossary 219
Questions 223
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