Environmental science 7.2 extinction and biodiversity loss answers

Sustainability Essay

Each of your textbook chapters has a "Bring It Home" conclusion naming personal choices you can make to help our world be more sustainable. Please list 4 personal choices, from any 4 different chapters (one each per any 4 of the 25 chapters) that have meant the most to you, and explain how you can personally make lifestyle changes that will have an impact on sustainability. What challenges do you face with these changes? For instance, if you want to use more public transportation, are the schedules and routes adequate? If you want to be a vegan, do you have the support of your roommates, friends or family who may be enthusiastic carnivores? Do you have international efforts underway, or want to start or join a larger movement? Choose the four ways you can personally be more sustainable, and if you've already made some changes, write about challenges you've faced to make these changes and/or rewards you experienced.

You must answer within a word-count (no less than 200 words, maximum count 350 words for entire essay (all four lifestyle choices are within one essay), citation sources do not count towards the wordcount, albeit words you cite within quotes do count, citing material from the course content, and using proper English grammar. A minimum of four different course reference sources from the course content (at least one chapter reference and at least one course video reference) are required to support your ideas for the entire essay. For textbook chapter references, you must provide author and page number(s), as example: (Karr, et al, p.57). For video references, you must provide video name with a minutes:seconds timestamp, as example: (The Future of Food: A Looming Crisis, 33:54) Outside-course citations may be used but will not be counted towards the four required. There is no need for a separate works cited page, please credit your sources within the body of your essay. Do NOT cite Wikipedia in this assignment.

If the formatting is off when you copy and paste, no worries, as long as you have the word count, good grammar and correct spelling, I won't delete points if the formatting is off (this occasionally happens when you copy and paste). Be sure to read the rubric below to earn as many points as possible:

Your grading rubric is as follows:

30pts if within wordcount requirement (no less than 200, no more than 350) 80pts lifestyle changes to support sustainability (20 each of 4) 40pts course material citations from different sources - use different chapters, include at least one video source (10pts each of 4)

Points will be deducted if necessary as follows: -5 poor grammar -10 typos/spelling errors

Reference:

https://www.youtube.com/watch?v=MLirNeu-A8I

http://www.unfpa.org/video/state-world-population-2013-motherhood-childhood

https://www.youtube.com/watch?v=Mj0eCPmnlr4

BRIEF CONTENTS INTRODUCTION TO ENVIRONMENTAL, SCIENCE, AND INFORMATION LITERACY

CHAPTER 1 ENVIRONMENTAL LITERACY AND THE GOAL OF SUSTAINABILITY 2 ON THE ROAD TO COLLAPSE

CHAPTER 2 SCIENCE LITERACY AND THE PROCESS OF SCIENCE 22 SCIENCE AND THE SKY

CHAPTER 3 INFORMATION LITERACY AND TOXICOLOGY 42 TOXIC BOTTLES?

HUMAN POPULATIONS AND ENVIRONMENTAL HEALTH

CHAPTER 4 HUMAN POPULATIONS 62 ONE-CHILD CHINA GROWS UP

CHAPTER 5 ENVIRONMENTAL HEALTH 80 ERADICATING A PARASITIC NIGHTMARE

CONSUMPTION AND THE ENVIRONMENTAL FOOTPRINT

CHAPTER 6 ECOLOGICAL ECONOMICS AND CONSUMPTION 98 WALL TO WALL, CRADLE TO CRADLE

CHAPTER 7 MANAGING SOLID WASTE 118 A PLASTIC SURF

ECOLOGY

CHAPTER 8 ECOSYSTEMS AND NUTRIENT CYCLING 138 ENGINEERING EARTH

CHAPTER 9 POPULATION ECOLOGY 158 THE WOLF WATCHERS

CHAPTER 10 COMMUNITY ECOLOGY 176 WHAT THE STORK SAYS

EVOLUTION AND BIODIVERSITY

CHAPTER 11 EVOLUTION AND EXTINCTION 198 A TROPICAL MURDER MYSTERY

CHAPTER 12 BIODIVERSITY 218 PALM PLANET

CHAPTER 13 PRESERVING BIODIVERSITY 238 A FOREST WITHOUT ELEPHANTS

WATER RESOURCES

CHAPTER 14 FRESHWATER RESOURCES 258 TOILET TO TAP

CHAPTER 15 WATER POLLUTION 278 INTO THE GULF

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Full-Length Chapters Available In Launchpad! FOOD RESOURCES

CHAPTER 16 FEEDING THE WORLD 298 A GENE REVOLUTION

CHAPTER 17 SUSTAINABLE AGRICULTURE: RAISING CROPS 316 FARMING LIKE AN ECOSYSTEM

CONVENTIONAL ENERGY: FOSSIL FUELS

CHAPTER 18 COAL 338 BRINGING DOWN THE MOUNTAIN

CHAPTER 19 OIL AND NATURAL GAS 360 THE BAKKEN OIL BOOM

AIR POLLUTION: CONSEQUENCES OF USING FOSSIL FUELS

CHAPTER 20 AIR POLLUTION 380 THE YOUNGEST SCIENTISTS

CHAPTER 21 CLIMATE CHANGE 402 WHEN THE TREES LEAVE

ALTERNATIVES TO FOSSIL FUELS

CHAPTER 22 NUCLEAR POWER 428 THE FUTURE OF FUKUSHIMA

CHAPTER 23 SUN, WIND, WATER, AND EARTH ENERGY 450 FUELED BY THE SUN

SUSTAINABLE LIVING IN COMMUNITY

CHAPTER 24 ENVIRONMENTAL POLICY 470 COUNTERFEIT COOLING

CHAPTER 25 URBANIZATION AND SUSTAINABLE COMMUNITIES 490 THE GHETTO GOES GREEN

ADDITIONAL CHAPTERS AVAILABLE ONLINE IN LAUNCHPAD!

CHAPTER 26 MINERAL RESOURCES: NO STONE UNTURNED CHAPTER 27 SOIL RESOURCES AND GRASSLANDS: RESTORING THE RANGE CHAPTER 28 FORESTS: RETURNING TREES TO HAITI CHAPTER 29 MARINE ECOSYSTEMS: ACID OCEANS CHAPTER 30 AGRICULTURE: RAISING LIVESTOCK: A CARNIVORE’S CONUNDRUM CHAPTER 31 FISHERIES AND AQUACULTURE: FISH IN A WAREHOUSE? CHAPTER 32 BIOFUELS: GAS FROM GRASS

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© Tyler Hicks/The New York Times/

Redux

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ENVIRONMENTAL SCIENCE FOR A CHANGING WORLD

SECOND EDITION

SUSAN KARR Carson-Newman University

JENEEN INTERLANDI Science Writer

ANNE HOUTMAN California State University, Bakersfield

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Publisher: Katherine Parker Senior Acquisitions Editor: Bill Minick Developmental Editor: Andrea Gawrylewski Executive Marketing Manager: John Britch Marketing Assistant: Bailey James Media and Supplements Editor: Amanda Dunning Editorial Assistants: Tue Tran & Shannon Moloney Art Director: Diana Blume Cover Design and Text Illustratiionons: MGMT. ddese ign Text Design: DDirirkk KaKaufufmamann PhPhototo o EdEdititorr: ShSheee na Goldsteeinin PhPhototo o ReReseseararchcherer: BiB anca Moscacatetelli ArArt MaMananageger:r: MMatatththewew MMcAdamsms SeSeniioror PProroduductctioionn SuSupepervrvisisor: Susanan WWeieinn PrPrinintit ngn andnd BBinndidingng: RRRR DDonnelleyy Coovever r PhPhototo:o Annnnieie Marie Musselman

Librarry ofo CCongresss s Controol Numberr: 202 14957697 ISI BNN-13: 997878-1-4464641--626 20-6 ISI BN-10: 1-46441-1-6220-4 ©2©2015 by W. H. Freeeman andd Company All rights reserved

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JAMES P. BLAIR/National Geographic

Creative

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www.whfreeman.com
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BRIEF CONTENTS INTRODUCTION TO ENVIRONMENTAL, SCIENCE, AND INFORMATION LITERACY

CHAPTER 1 ENVIRONMENTAL LITERACY AND THE GOAL OF SUSTAINABILITY 2 ON THE ROAD TO COLLAPSE

CHAPTER 2 SCIENCE LITERACY AND THE PROCESS OF SCIENCE 22 SCIENCE AND THE SKY

CHAPTER 3 INFORMATION LITERACY AND TOXICOLOGY 42 TOXIC BOTTLES?

HUMAN POPULATIONS AND ENVIRONMENTAL HEALTH

CHAPTER 4 HUMAN POPULATIONS 62 ONE-CHILD CHINA GROWS UP

CHAPTER 5 ENVIRONMENTAL HEALTH 80 ERADICATING A PARASITIC NIGHTMARE

CONSUMPTION AND THE ENVIRONMENTAL FOOTPRINT

CHAPTER 6 ECOLOGICAL ECONOMICS AND CONSUMPTION 98 WALL TO WALL, CRADLE TO CRADLE

CHAPTER 7 MANAGING SOLID WASTE 118 A PLASTIC SURF

ECOLOGY

CHAPTER 8 ECOSYSTEMS AND NUTRIENT CYCLING 138 ENGINEERING EARTH

CHAPTER 9 POPULATION ECOLOGY 158 THE WOLF WATCHERS

CHAPTER 10 COMMUNITY ECOLOGY 176 WHAT THE STORK SAYS

EVOLUTION AND BIODIVERSITY

CHAPTER 11 EVOLUTION AND EXTINCTION 198 A TROPICAL MURDER MYSTERY

CHAPTER 12 BIODIVERSITY 218 PALM PLANET

CHAPTER 13 PRESERVING BIODIVERSITY 238 A FOREST WITHOUT ELEPHANTS

WATER RESOURCES

CHAPTER 14 FRESHWATER RESOURCES 258 TOILET TO TAP

CHAPTER 15 WATER POLLUTION 278 INTO THE GULF

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FOOD RESOURCES

CHAPTER 16 FEEDING THE WORLD 298 A GENE REVOLUTION

CHAPTER 17 SUSTAINABLE AGRICULTURE: RAISING CROPS 316 FARMING LIKE AN ECOSYSTEM

CONVENTIONAL ENERGY: FOSSIL FUELS

CHAPTER 18 COAL 338 BRINGING DOWN THE MOUNTAIN

CHAPTER 19 OIL AND NATURAL GAS 360 THE BAKKEN OIL BOOM

AIR POLLUTION: CONSEQUENCES OF USING FOSSIL FUELS

CHAPTER 20 AIR POLLUTION 381 THE YOUNGEST SCIENTISTS

CHAPTER 21 CLIMATE CHANGE 402 WHEN THE TREES LEAVE

ALTERNATIVES TO FOSSIL FUELS

CHAPTER 22 NUCLEAR POWER 428 THE FUTURE OF FUKUSHIMA

CHAPTER 23 SUN, WIND, WATER, AND EARTH ENERGY 450 FUELED BY THE SUN

SUSTAINABLE LIVING IN COMMUNITY

CHAPTER 24 ENVIRONMENTAL POLICY 470 COUNTERFEIT COOLING

CHAPTER 25 URBANIZATION AND SUSTAINABLE COMMUNITIES 490 THE GHETTO GOES GREEN

ADDITIONAL CHAPTERS AVAILABLE ONLINE IN

CHAPTER 26 MINERAL RESOURCES: NO STONE UNTURNED CHAPTER 27 SOIL RESOURCES AND GRASSLANDS: RESTORING THE RANGE CHAPTER 28 FORESTS: RETURNING TREES TO HAITI CHAPTER 29 MARINE ECOSYSTEMS: ACID OCEANS CHAPTER 30 AGRICULTURE: RAISING LIVESTOCK: A CARNIVORE’S CONUNDRUM CHAPTER 31 FISHERIES AND AQUACULTURE: FISH IN A WAREHOUSE? CHAPTER 32 BIOFUELS: GAS FROM GRASS

APPENDIX 1 BASIC MATH SKILLS A-2 APPENDIX 2 DATA-HANDLING AND GRAPHING SKILLS A-4 APPENDIX 3 STATISTICAL ANALYSIS A-10 APPENDIX 4 GEOLOGY A-12 APPENDIX 5 SELECTED ANSWERS TO END-OF-CHAPTER PROBLEMS A-14 GLOSSARY G-2 CREDITS/SOURCES C-2 INDEX I-1

B R I E F C O N T E N T S

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DETAILED CONTENTS INTRODUCTION TO ENVIRONMENTAL, SCIENCE, AND INFORMATION LITERACY

CHAPTER 1 ENVIRONMENTAL LITERACY AND THE GOAL OF SUSTAINABILITY 2 ON THE ROAD TO COLLAPSE What lessons can we learn from a vanished Viking society?

Environmental science is all encompassing. 4

INFOGRAPHIC 1.1 Environmental Science Is Highly Interdisciplinary 5 1.2 Different Approaches to Science Have Different Goals and Outcomes 6 1.3 Wicked Problems 7

The Greenland Vikings’ demise was caused by natural events and human choices. 6

Responding to environmental problems and working with neighbors help a society cope with changes. 8

Humans are an environmental force that impacts Earth’s ecosystems. 9

INFOGRAPHIC 1.4 Many Environmental Problems Can be Traced to Three Underlying Causes 10

Ecosystems are naturally sustainable and a good model for human societies hoping to become more sustainable. 11

INFOGRAPHIC 1.5 Four Characteristics of a Sustainable Ecosystem 11 1.6 Sustainable Ecosystems Can be a Useful Model for Human Societies 12

Humanity faces some challenges in dealing with environmental issues. 13

INFOGRAPHIC 1.7 Social Traps 14 1.8 Wealth Inequality 15 1.9 Worldviews and Environmental Ethics 16 1.10 U.S. Environmental History 18

CHAPTER 2 SCIENCE LITERACY AND THE PROCESS OF SCIENCE 22 SCIENCE AND THE SKY Solving the mystery of disappearing ozone

Science gives us tools to observe and make sense of the natural world. 24

INFOGRAPHIC 2.1 The Atmosphere and UV Radiation 27

Scientifi c views rarely change overnight. 27

The scientifi c method systematically rules out explanations. 28

INFOGRAPHIC 2.2 Ozone Depletion and CFC Levels 28 2.3 Scientifi c Process 30 2.4 Certainty in Science 31

Diff erent types of studies amass a body of evidence. 30

INFOGRAPHIC 2.5 The Chemistry of Ozone Formation and Breakdown 32 2.6 How Do Scientists Collect Evidence to Answer Questions? 34

Multiple ozone depletion hypotheses were tested but only the CFC hypothesis was confi rmed. 35

The international community got together to meet the problem head on. 36

INFOGRAPHIC 2.7 The Montreal Protocol and Its Amendments Have Been Effective 37

CHAPTER 3 INFORMATION LITERACY AND TOXICOLOGY 42 TOXIC BOTTLES? On the trail of chemicals in our everyday lives

We live in an environment full of toxic substances. 44

Regulation happens even in the face of change. 45

Information sources vary in their reliability. 46

INFOGRAPHIC 3.1 Information Sources 47

What are the dangers presented by toxics, and how do we determine safe exposure levels? 47

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INFOGRAPHIC 3.2 Bioaccumulation and Biomagnifi cation 48 3.3 BPA Studies 50 3.4 Factors That Affect Toxicity 52

Endocrine disruptors cause big problems at small doses. 52

INFOGRAPHIC 3.5 How Hormones Work 53 3.6 Dose-Response Curves 54

Critical thinking gives us the tools to uncover logical fallacies in arguments or claims. 55

TABLE 3.1 Common Logical Fallacies 56

Risk assessments help determine safe exposure levels. 58

HUMANS POPULATIONS AND ENVIRONMENTAL HEALTH

CHAPTER 4 HUMAN POPULATIONS 62 ONE-CHILD CHINA GROWS UP A country faces the outcomes of radical population control

Human populations grew slowly at fi rst and then at a much faster rate in recent years. 64

INFOGRAPHIC 4.1 Human Population Through History 64 4.2 Population Distribution 66 4.3 Age Structure Affects Future Population Growth 67

Fertility rates are aff ected by a variety of factors. 68

INFOGRAPHIC 4.4 We Live In Two Demographic Worlds 69

Factors that decrease the death rate can also decrease overall population growth rates. 70

INFOGRAPHIC 4.5 Demographic Transition 71 4.6 Declining Population Growth Rates 72 4.7 Reaching Zero Population Growth 74

The age and gender composition of a population aff ects more than just its potential for growth. 73

Carrying capacity: Is zero population growth enough? 75

INFOGRAPHIC 4.8 How Many People Can Earth Support? 76

What awaits China’s generation of Little Emperors? 77

CHAPTER 5 ENVIRONMENTAL HEALTH 80 ERADICATING A PARASITIC NIGHTMARE Human health is intricately linked to the environment

Human manipulation of the environment can increase our exposure to pathogens. 83

INFOGRAPHIC 5.1 Types of Environmental Hazards 85

Public health programs seek to improve community health. 84

INFOGRAPHIC 5.2 Public Health Problems Seek to Improve Health of the Population as a Whole 86 5.3 Environmental Factors Contribute to the Global Burden of Disease 87 5.4 A Variety of Pathogens Cause Disease 88

Addressing biological hazards requires environmental and behavioral changes. 88

INFOGRAPHIC 5.5 Guinea Worm Infection and Eradication Programs 90

The factors that aff ect human health diff er signifi cantly between more and less developed nations. 90

Environmentally mediated diseases can be mitigated with funding, support, and education. 91

INFOGRAPHIC 5.6 Death Rates and Leading Causes of Death Differ Among Nations 92

TABLE 5.1 Reducing Environmental Health Hazards 93

INFOGRAPHIC 5.7 Eradicating Guinea Worm Disease 94

CONSUMPTION AND THE ENVIRONMENTAL FOOTPRINT

CHAPTER 6 ECOLOGICAL ECONOMICS AND CONSUMPTION 98 WALL TO WALL, CRADLE TO CRADLE A leading carpet company takes a chance on going green

Businesses and individuals impact the environment with their economic decisions. 101

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INFOGRAPHIC 6.1 Value of Ecosystem Services 101 6.2 Ecological Footprint 103 6.3 Capital and Interest 104 6.4 The IPAT Equation 105

Mainstream economics supports some actions that are not sustainable. 105

INFOGRAPHIC 6.5 True Cost Accounting 107 6.6 Economic Models 108 6.7 Cradle-to-Cradle Management 110

Businesses can learn a great deal about how to be sustainable from nature. 111

INFOGRAPHIC 6.8 Product Versus Service Economy 113

There are many tactics for achieving sustainability 112

CHAPTER 7 MANAGING SOLID WASTE 118 A PLASTIC SURF Are the oceans teeming with trash?

Waste is a uniquely human invention, generated by uniquely human activities. 121

INFOGRAPHIC 7.1 U.S. Municipal Solid Waste Stream 123

How big is the Atlantic Garbage Patch, and is it growing? 123

How we handle waste determines where it ends up. 124

INFOGRAPHIC 7.2 Municipal Solid Waste Disposal 125 7.3 How It Works: An Incinerator 127

Solid waste pollution threatens all living things. 127

INFOGRAPHIC 7.4 Plastic Trash Affects Wildlife 128

Some waste is hazardous and needs to be handled carefully. 129

INFOGRAPHIC 7.5 Household Hazardous Wastes 130

When it comes to managing waste, the best solutions mimic nature. 130

INFOGRAPHIC 7.6 Composting 131

Life-cycle analysis and better design can help reduce waste. 130

INFOGRAPHIC 7.7 Industrial Ecology 132

Consumers have a role to play, too. 132

INFOGRAPHIC 7.8 The Four Rs Help You Reduce Waste 134

ECOLOGY

CHAPTER 8 ECOSYSTEMS AND NUTRIENT CYCLING 138 ENGINEERING EARTH An ambitious attempt to replicate Earth’s life support systems falls short

Organisms and their habitats form complex systems. 140

INFOGRAPHIC 8.1 Organization of Life: From Biosphere to Individual 142 8.2 Habitat and Niche 143 8.3 Earth Is a Closed System for Matter but Not for Energy 143 8.4 Global Terrestrial Biomes 144 8.5 Map of Biosphere 2 147

Living things survive within a specifi c range of environmental conditions. 146

INFOGRAPHIC 8.6 Range of Tolerance for Life 148

Nutrients such as carbon cycle through ecosystems. 149

INFOGRAPHIC 8.7 Carbon Cycles via Photosynthesis and Cellular Respiration 150 8.8 The Carbon Cycle 151 8.9 The Nitrogen Cycle 152 8.10 The Phosphorus Cycle 153

Ecosystems are irreplaceable, but learning how they function will help us restore degraded ones. 155

CHAPTER 9 POPULATION ECOLOGY 158 THE WOLF WATCHERS Endangered gray wolves return to the American West

Populations fl uctuate in size and have varied distributions. 161

INFOGRAPHIC 9.1 Population Distribution Patterns 163

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Populations display various patterns of growth. 164

INFOGRAPHIC 9.2 Exponential Growth Occurs When There Are No Limits to Growth 165 9.3 Logistic Population Growth 166

A variety of factors aff ect population growth. 166

INFOGRAPHIC 9.4 Density-Dependent and Density-Independent Factors Affect Population Size 167 9.5 Life History Strategies 168 9.6 Some Populations Fluctuate in Size Over Time 169

The loss of the wolf emphasized the importance of an ecosystem’s top predator. 169

INFOGRAPHIC 9.7 Top-Down and Bottom-Up Regulation 171

CHAPTER 10 COMMUNITY ECOLOGY 176 WHAT THE STORK SAYS A bird species in the Everglades reveals the intricacies of a threatened ecosystem

The well-being of a species depends on the health of its ecosystem. 178

Human alterations have changed the face of the Everglades. 180

Matter and energy move through a community via the food web. 181

INFOGRAPHIC 10.1 Everglades Food Web 181 10.2 Trophic Pyramid 183

Communities, such as the ones found in the Everglades, are shaped by biotic and abiotic factors. 183

INFOGRAPHIC 10.3 Species Diversity Includes Richness and Evenness 185 10.4 Mangrove Edges 186 10.5 Edge Effects 187

Changing community structure changes community composition 186

INFOGRAPHIC 10.6 Keystone Species Support Entire Ecosystems 188

Species interactions are extremely important for community viability. 189

INFOGRAPHIC 10.7 Species Interactions 190

Ecologists and engineers help repair ecosystems. 191

INFOGRAPHIC 10.8 The Comprehensive Everglades Restoration Plan 193

Community composition changes over time as the physical features of the ecosystem itself change. 192

INFOGRAPHIC 10.9 Ecological Succession 194

EVOLUTION AND BIODIVERSITY

CHAPTER 11 EVOLUTION AND EXTINCTION 198 A TROPICAL MURDER MYSTERY Finding the missing birds of Guam

Natural selection is the main mechanism by which populations adapt and evolve. 201

INFOGRAPHIC 11.1 Natural Selection at Work 203

Populations need genetic diversity to evolve. 202

INFOGRAPHIC 11.2 Evolution in Action 204 11.3 Coevolution Allows Populations to Adapt to Each Other 206 11.4 Endangered and Extinct Birds of Guam 207

Populations can diverge into subpopulations or new species. 206

INFOGRAPHIC 11.5 Random Events Can Alter Populations 209

The pace of evolution is generally slow but is responsive to selective pressures. 210

Extinction is normal, but the rate at which it is currently occurring appears to be increasing. 210

INFOGRAPHIC 11.6 Earth’s Mass Extinctions 211

Humans aff ect evolution in a number of ways. 212

INFOGRAPHIC 11.7 Humans Use Artifi cial Selection to Produce Plants or Animals with Desired Traits 212

TABLE 11.1 Common Misconceptions about Evolution 214

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CHAPTER 12 BIODIVERSITY 218 PALM PLANET Can we have tropical forests and our palm oil too?

Biodiversity provides a wide range of essential goods and services. 220

INFOGRAPHIC 12.1 Biodiversity on Earth 222 12.2 Ecosystem Services 224

Biodiversity includes variety at the individual, species, and ecosystem levels. 225

INFOGRAPHIC 12.3 Biodiversity Includes Genetic, Species, and Ecosystem Diversity 226 12.4 Biodiversity Hotspots 227

Endemism increases with isolation, as does extinction risk. 228

INFOGRAPHIC 12.5 Isolation Can Affect Populations 229

Biodiversity faces several serious threats. 228

INFOGRAPHIC 12.6 Palm Oil Plantations Are Nothing Like Natural Tropical Forests 230 12.7 Global Forest Change 232

Sustainable palm oil may protect biodiversity. 233

TABLE 12.1 Protecting Biodiversity Requires a Consideration of Economic Goals and Environmental Needs 234

CHAPTER 13 PRESERVING BIODIVERSITY 238 A FOREST WITHOUT ELEPHANTS Can we save one of Earth’s iconic species?

Human impact is the main threat to species worldwide. 241

INFOGRAPHIC 13.1 The Main Threats to Biodiversity Today Come from Humans 242 13.2 Conservation Designations 243

Human impact that threatens the forest elephant also puts its entire ecosystem at risk. 243

There are multiple approaches to species conservation. 244

INFOGRAPHIC 13.3 Single Species Conservation Approach 245 13.4 Species Conservation: An Ecosystem Approach 247 13.5 Tracking Poachers by Using Conservation Genetics 248

Legally mandated protection can aid in species conservation. 249

TABLE 13.1 Legal Protection for Species 249

INFOGRAPHIC 13.6 Global Protected Areas 250

Conservation plans should consider the needs of local human communities. 252

TABLE 13.2 Many Routes to Conservation 254

WATER RESOURCES

CHAPTER 14 FRESHWATER RESOURCES 258 TOILET TO TAP A California county is tapping controversial sources for drinking water

Water is one of the most ubiquitous, yet scarce, resources on Earth. 260

INFOGRAPHIC 14.1 Distribution of Water on Earth 261 14.2 The Water Cycle 262 14.3 Global Water Use and Access 263

Like communities around the world, California depends on many sources of water. 264

INFOGRAPHIC 14.4 Groundwater Is Found in Aquifers of Porous Rock or Permeable Soil 265

Untreated wastewater can contaminate freshwater sources and is a serious health risk worldwide. 266

Solving water shortages is not easy. 268

INFOGRAPHIC 14.5 How it Works: Wastewater Treatment 269

Conservation is an important "source" of water. 272

TABLE 14.1 Water-Saving Technologies and Actions 272

INFOGRAPHIC 14.6 Reducing Our Water Footprint 273

CHAPTER 15 WATER POLLUTION 278 INTO THE GULF Researchers try to pin down what's choking the Gulf of Mexico

Diff erent types of water pollution degrade water quality. 280

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INFOGRAPHIC 15.1 Major Causes of Water Pollution 283 15.2 Eutrophication Can Create Dead Zones 284

The source of pollution can be hard to pinpoint. 284

INFOGRAPHIC 15.3 Watersheds 285

Addressing eutrophication begins in the farm fi eld. 287

INFOGRAPHIC 15.4 Addressing the Problem of Fertilizer Runoff 289

Watershed management is the key to reducing hypoxic zones. 288

INFOGRAPHIC 15.5 Healthy Riparian Areas Provide Many Benefi ts 291 15.6 Increasing Infi ltration of Stormwater 292 15.7 Gulf of Mexico Regional Ecosystem Restoration 293

FOOD RESOURCES

CHAPTER 16 FEEDING THE WORLD 298 A GENE REVOLUTION Can genetically engineered food help end hunger?

World hunger and malnutrition are decreasing but are still unacceptably high. 300

INFOGRAPHIC 16.1 World Hunger 301 16.2 Malnutrition 302

Agricultural advances signifi cantly increased food production in the 20th century. 303

INFOGRAPHIC 16.3 The Perks and Problems of Industrial Agriculture and the Green Revolution 304

The next Green Revolution may be a “gene” revolution. 305

INFOGRAPHIC 16.4 Making a Genetically Modifi ed Organism 307

TABLE 16.1 Examples of GMOs 309

Concerns about GMOs trigger strong debate. 309

It will take a combination of strategies to achieve global food security. 310

INFOGRAPHIC 16.5 The Trade-Offs of GMOs 311 16.6 Low-Tech Farming Methods Can Also Help Address Food Insecurity 312

CHAPTER 17 SUSTAINABLE AGRICULTURE: RAISING CROPS 316 FARMING LIKE AN ECOSYSTEM Creative solutions to feeding the world

INFOGRAPHIC 17.1 Sustainable Agriculture 319

Modern industrial farming has advantages and disadvantages. 319

INFOGRAPHIC 17.2 The Use of Fertilizer Comes with Trade-Offs 321 17.3 Emergence of Pesticide-Resistant Pests 322

Mimicking natural ecosystems can make farms more productive and help address some environmental problems. 324

INFOGRAPHIC 17.4 Agroecology: The Duck/Rice Farm 325

Sustainable techniques can control pests, protect soil, and keep farm productivity high. 327

INFOGRAPHIC 17.5 Integrated Pest Management (IPM) 329 17.6 Sustainable Soil Management Practices 331

Consumers also have a role to play in helping to bring about a sustainable food system. 332

INFOGRAPHIC 17.7 Consumer Choices Matter 333

A sustainable food future will depend on a variety of methods. 332

TABLE 17.1 The Advantages and Disadvantages of Sustainable Agriculture 335

Can sustainable farming methods feed the world? 334

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CONVENTIONAL ENERGY: FOSSIL FUELS

CHAPTER 18 COAL 833 BRINGING DOWN THE MOUNTAIN In the rubble, the true costs of coal

The world depends on coal for most of its electricity production. 143

INFOGRAPHIC 18.1 How it Works: Electricity Production from Coal 342

Coal forms over millions of years. 343

INFOGRAPHIC 18.2 Coal Formation 443 18.3 Major Coal Deposits of the World 345

s. 344

INFOGRAPHIC 18.4 Mountaintop Removal 643 18.5 Subsurface Mining 743

Surface mining brings severe environmental impacts. 348 Can coal’s emissions be cleaned up? 053

INFOGRAPHIC 18.6 Environmental and Health Problems of Mining and Burning Coal 253 18.7 How it Works: Carbon Capture and Sequestration (CCS) 354

Reclaiming a closed mining site helps repair the area but can never re-create the original ecosystem. 354

INFOGRAPHIC 18.8 Mine Site Reclamation 356

CHAPTER 19 OIL AND NATURAL GAS 360 THE BAKKEN OIL BOOM Is fracking the path to energy independence?

Fossil fuels are a valuable, but nonrenewable, resource. 362

INFOGRAPHIC 19.1 How Oil and Natural Gas Fossil Fuels Form 363

Oil is a limited resource. 463

INFOGRAPHIC 19.2 Proven Oil and Natural Gas Reserves 364 19.3 Peak Oil 563

Conventional oil and natural gas reserves are tapped by drilling wells. 563

INFOGRAPHIC 19.4 How it Works: Conventional Oil and Natural Gas Wells 366 19.5 Processing Crude Oil 367

Fossil fuel extraction and use comes at a high environmental cost. 367

INFOGRAPHIC 19.6 Environmental Costs of Oil 370

Energy producers are turning to unconventional reserves of oil and natural gas. 369

INFOGRAPHIC 19.7 Fracking for Natural Gas or Oil 371 19.8 Unconventional Oil and Natural Gas Reserves in the United States and Canada 373

Pursuing unconventional reserves comes with a high environmental cost. 372

Is fracking the answer to our energy needs? 374

INFOGRAPHIC 19.9 The Trade-Offs of Fracking 375

Oil consumption drives extraction. 375

AIR POLLUTION: CONSEQUENCES OF USING FOSSIL FUELS

CHAPTER 20 AIR POLLUTION 380 THE YOUNGEST SCIENTISTS Kids on the frontlines of asthma research

INFOGRAPHIC 20.1 Air Pollution Is a Worldwide Problem 384

There are many diff erent types of outdoor air pollution. 384

Air pollution is responsible for myriad health and environmental problems. 386

INFOGRAPHIC 20.2 Outdoor Air Pollution 386 20.3 The Harvard Six Cities Study Linked Air Pollution to Health Problems 387

Outdoor air pollution has many sources. 389

TABLE 20.1 Sources and Effects of Air Pollutants 390

The air we breathe aff ects our lungs, especially those of children. 389

Traveling pollution has far-reaching impacts. 392

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INFOGRAPHIC 20.4 Acid Deposition 393

Indoor air pollution is also a signifi cant health threat. 394

INFOGRAPHIC 20.5 Sources of Indoor Air Pollution 593

We have several options for addressing air pollution. 394

INFOGRAPHIC 20.6 Approaches to Reducing Air Pollution 398

CHAPTER 21 CLIMATE CHANGE 402 WHEN THE TREES LEAVE Scientists grapple with a shifting climate

Climate is not the same thing as weather. 404 Evidence of global climate change abounds. 405

INFOGRAPHIC 21.1 A Change in Average Temperature: Why Do Only a Few Degrees Matter? 604 21.2 Evidence for Climate Change 804

ect climate. 704

INFOGRAPHIC 21.3 The Greenhouse E�ect 114 21.4 Albedo Changes Can Increase Warming via Positive Feedback 214 21.5 Climate Forcers 314 21.6 Milankovich Cycles Help Explain Past Climate Change 414 21.7 Direct and Indirect Measurements of Temperature and CO 2 415

Current climate change has both human and natural causes. 416

INFOGRAPHIC 21.8 What’s Causing the Warming? 714

Some tree species are already migrating north, but it doesn’t mean they will survive. 714

INFOGRAPHIC 21.9 Species’ Responses 814

Climate change has environmental, economic, and health consequences. 024 Confronting climate change is challenging. 421

INFOGRAPHIC 21.10 Future Climate Change Depends on Our Current and Future Actions 224 21.11 Current and Potential Climate Change Impacts and Adaptation Strategies 424

ALTERNATIVES TO FOSSIL FUELS

CHAPTER 22 NUCLEAR POWER 428 THE FUTURE OF FUKUSHIMA Can nuclear energy overcome its bad rep?

The heat of nuclear reactions can be harnessed to produce electricity. 034

INFOGRAPHIC 22.1 Atoms and Isotopes 234 22.2 Radioactive Decay 334 22.3 Nuclear Fuel Production 434 22.4 Nuclear Fission Reaction 534

Nuclear energy has a troubled history. 436

Nuclear accidents can be devastating. 437

INFOGRAPHIC 22.5 How it Works: Nuclear Reactors 834 22.6 Radioactive Isotopes Can Release One or More of Three Di�erent Kinds of Radiation 439

The generation of nuclear waste is a particularly cult problem to address. 394

INFOGRAPHIC 22.7 Radioactive Waste 144

cult and dangerous work. 044 The impacts of nuclear accidents can be far reaching. 443 Will nuclear play a role in future energy? 444

TABLE 22.1 Nuclear Power: Trade-O�s 644

The future of nuclear energy is uncertain. 445

CHAPTER 23 SUN, WIND, WATER, AND EARTH ENERGY 054 FUELED BY THE SUN A tiny island makes big strides with renewable energy

Sustainable ecosystems and societies rely on renewable energy. 254

To become sustainable, Samsø turned to one of its most plentiful natural resources. 354

INFOGRAPHIC 23.1 Renewable Energy Use 454 23.2 How it Works: Wind Turbines 554

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The most abundant sustainable energy source is the one that powers the planet—the Sun. 456

INFOGRAPHIC 23.3 Solar Energy Technologies Take Many Forms 457

Energy that causes volcanos to erupt and warms hot springs can also heat our homes. 458

INFOGRAPHIC 23.4 Geothermal Energy Can Be Harnessed in a Variety of Ways 460

The power of water can be harnessed but comes with Trade-Off s 459

INFOGRAPHIC 23.5 Harnessing the Power of Water 462

The true cost of various energy technologies can be diffi cult to estimate. 461

TABLE 23.1 The Trade-Offs of Renewable Energy Sources 463

Conservation plays a vital role in a sustainable energy society. 464

TABLE 23.2 Saving Energy 465

INFOGRAPHIC 23.6 Energy Effi ciency 466 23.7 Samsø: The Energy-Positive Island 467

SUSTAINABLE LIVING IN COMMUNITY

CHAPTER 24 ENVIRONMENTAL POLICY 470 COUNTERFEIT COOLING In the global efforts to thwart climate change, some lessons are learned after the fact

Public policies aim to improve life in societies. 473

INFOGRAPHIC 24.1 Addressing Transboundary Environmental Problems Requires International Cooperation 474 24.2 Policy Decision Making—The NEPA Process 475

TABLE 24.1 Notable U.S. Environmental Laws 476

Policy making involves many players. 475

INFOGRAPHIC 24.3 Infl uences on U.S. Environmental Policy Decision Making 478

A variety of policy tools are being used to address climate change. 479

INFOGRAPHIC 24.4 Policy Tools 478 24.5 Setting International Policies 481 24.6 International Efforts to Address Global Climate Issues 482

Policies sometimes have unintended consequences. 483

INFOGRAPHIC 24.7 Emission Trends 484 24.8 A Carbon Crediting System Gets Sidetracked 485

Adapting policies is necessary but diffi cult. 486

CHAPTER 25 URBANIZATION AND SUSTAINABLE COMMUNITIES 490 THE GHETTO GOES GREEN Building a better backyard in the Bronx

More people live in cities than ever before. 492

INFOGRAPHIC 25.1 Urbanization and the Growth of Megacities 494 25.2 Many Urban Areas Have Lower Per Capita Ecological Footprints than Average 496

TABLE 25.1 Trade-Offs of Urbanization 497

Suburban sprawl consumes open space and wastes resources. 497

INFOGRAPHIC 25.3 Urban Flight Contributes to Suburban Sprawl 499 25.4 Suburban Sprawl 500

Environmental justice requires engaged citizens. 502

INFOGRAPHIC 25.5 Green Cities 503

The future depends on making large cities sustainable. 502

INFOGRAPHIC 25.6 Sustainable Cities and Smart Growth 505 25.7 Green Building 506

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ONLINE CHAPTER 26 MINERAL RESOURCES NO STONE UNTURNED A bevy of unfamiliar minerals are crucial for our everyday technologies—but they come with a slew of problems

Modern society relies heavily on mineral resources.

INFOGRAPHIC 26.1 Mineral Resources are a Part of Our Everyday Lives 26.2 Earth—A Dynamic Planet

Geologic processes produce mineral resources.

INFOGRAPHIC 26.3 Minerals, Rocks, and the Rock Cycle

Extracting and processing mineral resources impacts the environment.

INFOGRAPHIC 26.4 Mining Techniques 26.5 Extraction of Minerals From Ore Requires Many Processing Steps 26.6 The Environmental Impacts of Mining

Mining also comes with signifi cant social consequences.

INFOGRAPHIC 26.7 The Social Impact of Mining

There are many ways to decrease our use of mineral resources.

INFOGRAPHIC 26.8 Aluminum Recycling: A Success Story 26.9 Alternatives that Reduce Our Use of Mineral Resources

ONLINE CHAPTER 27 SOIL RESOURCES AND GRASSLANDS RESTORING THE RANGE The key to recovering the world’s grasslands may be a surprising one

Grasslands provide a wide range of important goods and services.

INFOGRAPHIC 27.1 Grasslands of the World 27.2 Grassland Goods and Services

Grasslands face a variety of human and natural threats.

INFOGRAPHIC 27.3 Desertifi cation

The importance of soil can't be overemphasized.

INFOGRAPHIC 27.4 Soil Formation

Grasslands can benefi t from the grazing style of wildlife but can be degraded by the grazing practices of modern ranching.

INFOGRAPHIC 27.5 Impacts of wild versus domestic grazers 27.6 Undergrazing can increase the proportion of unpalatable

species.

Counteracting overgrazing requires careful planning.

Nature off ers clues about how to use grasslands sustainably.

INFOGRAPHIC 27.7 Planned Grazing

There are many ways to protect grasslands.

TABLE 27.1 Protecting Grasslands

ONLINE CHAPTER 28 FORESTS RETURNING TREES TO HAITI Repairing a forest ecosystem one tree at a time

The type of forest found in an area refl ects local climatic conditions.

INFOGRAPHIC 28.1 Forests of the World 28.2 Cross Section of a Forest

Forests provide a range of goods and services and face a number of threats.

INFOGRAPHIC 28.3 Ecosystem Services of Forests 28.4 Threats to Forests

Forests can be managed to protect or enhance their ecological and economic productivity.

INFOGRAPHIC 28.5 Timber-Harvesting Techniques

When it comes to protecting forests, we have many options.

TABLE 28.1 Protecting Forests

ONLINE CHAPTER 29 MARINE ECOSYSTEMS ACID OCEANS Aquanauts explore an ecosystem on the brink

Acidifi cation threatens life in the world’s oceans.

INFOGRAPHIC 29.1 pH and Ocean Acidifi cation 29.2 Acidifi cation Alters Ocean Chemistry and Calcifi cation

Marine ecosystems are diverse.

INFOGRAPHIC 29.3 Ocean Life Zones 29.4 Coral reefs: Distribution and Status

AVAILABLE ONLINE IN

http://www.macmillanhighered.com/launchpad/saes2e

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Can some populations adapt to ocean acidifi cation?

Coral reefs are complex communities with lots of interspecifi c interactions.

INFOGRAPHIC 29.5 Coral Biology 29.6 Coral Bleaching

The world’s oceans face many other threats.

INFOGRAPHIC 29.7 Threats to Oceans

Reducing the threats to oceans requires a multi-pronged approach.

TABLE 29.1 Reducing the Threats to Ocean Ecosystems

ONLINE CHAPTER 30 AGRICULTURE: RAISING LIVESTOCK A CARNIVORE’S CONUNDRUM Disease, pollution, and the true costs of meat

The way we raise livestock may jeopardize the safety of food products.

INFOGRAPHIC 30.1 E. Coli—Just the Tip of the Iceberg

Affl uence infl uences diet.

INFOGRAPHIC 30.2 Affl uence Affects Diet and Health

CAFOs can raise a large number of animals quickly, but incur a huge environmental cost.

INFOGRAPHIC 30.3 Growing Livestock: Feed and Water Needs 30.4 From Farm to You

A variety of methods can reduce E. coli contamination.

INFOGRAPHIC 30.5 E. Coli 0157:H7 Infections are Decreasing in the United States

There are more sustainable ways to grow livestock.

U.S. food policies support industrial agriculture.

INFOGRAPHIC 30.6 Agricultural Policy Must Consider Trade-Offs

Consumer choices can increase food supply.

INFOGRAPHIC 30.7 Diet and Carrying Capacity

ONLINE CHAPTER 31 FISHERIES AND AQUACULTURE FISH IN A WAREHOUSE? How one Baltimore fi sh scientist could change the way we eat

Industrial fi shing is impacting fi sheries worldwide.

INFOGRAPHIC 31.1 Meet the Cod 31.2 Bottom Trawling

Humans rely on protein from fi sh but overfi shing of wild stocks makes it harder for fi sh populations to recover.

INFOGRAPHIC 31.3 Fishing Down the Food Chain 31.4 Status of Marine Fisheries

Laws exist to protect and manage fi sheries.

INFOGRAPHIC 31.5 Protection for Marine Areas

Scientists study the possibility of growing marine fi sh indoors.

Aquaculture presents environmental challenges.

TABLE 31.1 Net Pen and Pond Aquaculture: Problems and Possible Solutions

Indoor fi sh farming may provide a solution.

INFOGRAPHIC 31.6 Biomimicry in the Pool

ONLINE CHAPTER 32 BIOFUELS GAS FROM GRASS Will an ordinary prairie grass become the next biofuel?

Biofuels are a potentially important alternative to fossil fuels.

INFOGRAPHIC 32.1 Biofuel Sources

Biofuels can come from unexpected sources.

INFOGRAPHIC 32.2 Waste to Energy

Turning grass into gas is less environmentally friendly than it sounds.

TABLE 32.1 Biofuel Trade-Offs

Tilman’s experiments showed the importance of biodiversity.

INFOGRAPHIC 32.3 LIHD Crops Offer Advantages Over Traditional Monoculture Biofuel Crops

There is another rising biofuel star: Algae.

INFOGRAPHIC 32.4 Biofuels from Algae

There are many reasons why biofuels have not solved our dependence on fossil fuels.

INFOGRAPHIC 32.5 Bioethanol Production

Multiple solutions will be needed to help replace fossil fuels.

INFOGRAPHIC 32.6 Energy Effi ciency and Conservation are Part of the Solution

Despite ongoing controversies and setbacks, the future of biofuels looks bright.

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SUSAN KARR, MS, is an Instructor in the biology department of Carson-Newman University in Jeff erson City, Tennessee, and has been teaching for more than 20 years. She has served on campus and community environmental sustainability groups and helps produce an annual “State of the Environment” report on the environmental health of her county. In addition to teaching non-majors courses in environmental science and human biology, she teaches an upper- level course in animal behavior where she and her students train dogs from the local animal shelter in a program that improves the animals’ chances of adoption. She received degrees in animal behavior and forestry from the University of Georgia.

JENEEN INTERLANDI, MA, MS, is a science writer who contributes to Scientifi c American and The New York Times Magazine. Previously, she spent four years as a staff writer for Newsweek, where she covered health, science, and the environment. Jeneen has worked as a researcher at both Harvard Medical School and Lamont Doherty Earth Observatory. She was a 2013 Nieman Fellow. In 2014 she received a grant from the Pulitzer Center for Crisis Reporting, to cover the struggles of Roma ascension in Hungary. Jeneen holds Master’s degrees in environmental science and journalism, both from Columbia University in New York.

ANNE HOUTMAN, DPHIL, is Dean of the School of Natural Sciences, Mathematics and Engineering, and Professor of Biological Sciences at California State University, Bakersfi eld. Her research interests are in the behavioral ecology of birds. She is strongly committed to evidence-based, experiential education and has been an active participant in the national dialogue on science education—how best to teach science to future scientists and future science “consumers”—for almost 20 years. Anne received her doctorate in zoology from the University of Oxford and conducted postdoc toral research at the University of Toronto.

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Dear Reader, For more than 20 years as an environmental science and biology instructor I’ve found that “stories” capture the imagination of my students. Students are genuinely interested in environmental issues—and using stories to teach these issues makes the science more relevant and meaningful to them. Many leave the class with an understanding that what they do really matters, and they feel a willingness to act on that knowledge. This is why I am enthusiastic about our textbook, Environmental Science for a Changing World.

Each chapter will keep students engaged and reading to fi nd out “what happens next.” At the same time, explanations of science are woven into the narrative and illustrated in vivid infographics that give additional detail without slowing down the story. We’ve heard from instructors using the book (and our own students) and we know students are actually reading the textbook and being drawn into the stories, making it is easier for them to make connections between the environmental science concepts being taught and the “bigger picture” of why it matters.

In this book we’ve broken some topics down into multiple chapters—for instance, we present separate, short chapters on coal, petroleum and natural gas, and nuclear power rather than the traditional single chapter on conventional energy. This gives instructors the fl exibility to focus on discrete topics if they choose.

In this second edition, we have added some popular chapters (originally in the extended edition only): Environmental Health, Environmental Policy, World Hunger, and Biodiversity Preservation. We also moved some of the chapters online to LaunchPad, the textbook’s web platform, as a way to make all of our chapters available to every adopter, giving even more fl exibility in choosing which chapters and topics to cover. (LaunchPad chapters new to the second edition include a chapter on Mineral Resources and Geology as well as an additional agriculture chapter on Raising Livestock in CAFOs. Other chapters found in the fi rst edition that now reside on LaunchPad include chapters on Forest Resources, Grasslands and Soils, Marine Resources, Fisheries, and Biofuels.) Every chapter has been updated to include the latest information.

We also listened to instructor feedback and in this second edition we have added pedagogical aids such as key concepts and end-of-chapter study aids that are tied to the guiding questions that open each chapter. This will help students focus on the important environmental science concepts being presented in the chapter. We’ve also added questions to each infographic to better engage the student with the fi gures and diagrams.

As with the fi rst edition, the text focuses on building core competencies for the non-major: environmental literacy, science literacy, and information literacy. End-of-chapter and online exercises provide further opportunities to develop these competencies, as well as critical thinking skills.

Environmental Literacy: The scientifi c, social, political, and economic facets of contemporary environmental issues are examined with a focus on the scientifi c concepts and drivers underlying issues. Material is presented in a balanced way, especially for controversial topics. Sustainable solutions are presented.

Science Literacy: Each chapter includes experimental evidence and graphical data representation, and describes the day-to-day work of scientists, giving students many opportunities to evaluate evidence and understand the process of science.

Information Literacy: Students must be able to both fi nd information and assess its quality. We explain how to effectively search for and fi nd scientifi c information, and how to critically analyze that information.

Every person involved in this book—the writers, illustrators, editors, and fellow instructors—has one sincere objective: to help students become informed citizens who are able to analyze issues, evaluate arguments, discuss solutions, and recognize trade-offs as they make up their own minds about our most pressing environmental challenges.

Sincerely,

Susan Karr

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CAPTIVATING STORIES STUDENTS FOLLOW ONE RIVETING STORY THROUGHOUT THE ENTIRE CHAPTER

Laurel Sutherlin of the Rainforest Action Network went to Sumatra to gauge the impact of the expanding palm oil industry on the island.

See page 220

The orangutan is among the many species being driven to the edge of extinction by the pursuit of palm oil. So much of the Sumatran rain forest land has been laid low that Laurel Sutherlin and his team had to travel overnight and through the morning to reach an untouched section. But once there, they witnessed fi rsthand its rich biodiversity.

See pages 223, 235, 238 & 242

FROM THE OPENING PAGE TO THE END-OF CHAPTER QUESTIONS, AND EVERYWHERE IN BETWEEN, EACH CHAPTER FOLLOWS AN ENGAGING REAL STORY THAT ILLUSTRATES AND MOTIVATES CORE SCIENCE CONCEPTS. HERE ARE FOUR OF MANY PLACES IN THIS CHAPTER WHERE THE STORY UNFOLDS.

Vier Pfoten/Four Paws/RHOI/Rex Features via AP Images

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In 2012, Malaysian geneticist Raviga Sambanthamurthi and her team of researchers discovered the SHELL gene, which is responsible for the most productive palm oil fruit. Farmers now can identify the seeds for this fruit before planting, and produce more oil per hectare.

See page 233

Consumer demands are leading to changes in the palm oil industry. Thanks to the “Snack Food 20” Campaign by Laurel Sutherlin’s Rainforest Action Network, some of the world’s largest snack food companies have pledged to use only sustainably produced palm oil.

See pages 244-245

CHAPTER 12:

PALM PLANET: Can we have tropical forests and our palm oil too?

CHAPTER 12:

PALM PLANET: Can we have tropical forests and our palm oil too?

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ENVIRONMENTAL SCIENCE FOR A CHANGING WORLD OFFERS A CONSISTENT METHODOLOGY FOR TEACHING THE FIELD’S ESSENTIAL SCIENTIFIC CONCEPTS, WITH EACH CHAPTER CENTERED AROUND FIVE GUIDING QUESTIONS.

THESE QUESTIONS ESTABLISH A CLEAR, STEP-BY-STEP PATHWAY THROUGH THE CHAPTER FROM THE OPENING STORY; THROUGH THE NARRATIVE, KEY CONCEPT CALLOUTS, PHOTOS, INFOGRAPHICS; TO THE END-OF-CHAPTER ASSESSMENT. THE QUESTIONS BRING THE SCIENCE IN THE CHAPTER TO THE FOREFRONT, SO STUDENTS NEVER LOSE SIGHT OF FUNDAMENTAL CONCEPTS WHILE READING THE STORY.

218 C H A P T E R 12 : B I O D I V E R S I T YC H A P T E R 1: E N V I R O N M E N TA L L I T E R A C Y218

C H A PT E R 1 2 B I O D I V E R S I T Y

PALM PLANET

What is biodiversity, and why is it important? How many species are estimated to live on Earth, and which taxonomic groups have the most species?

How do genetic, species, and ecosystem diversity each contribute to ecosystem function and services?

1 2AFTER READING THIS CHAPTER, YOU SHOULD

BE ABLE TO ANSWER THE FOLLOWING

GUIDING QUESTIONS

CORE MESSAGE The variety of life on Earth is

tremendous. This biodiversity provides important ecological

services to ecosystems; we depend on these services for

things like food, medicine, and economic development. The

decline of biodiversity has serious ramifications for other species

as well as human well-being, so we should evaluate actions that

threaten biodiversity and take steps to reduce the impact when possible.

Can we have tropical forests and our palm oil too?

1

pg 235 pg 236

2 3

pg 239

EMPOWERING SCIENCE

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Each chapter begins with a Core Message and a series of Guiding Questions that focus students on the chapter’s central scientifi c content.

The new Key Concepts correspond to the Guiding Questions, re-emphasizing the chapter’s essential scientifi c ideas.

Moving through the chapter, students encounter icons that connect the Guiding Questions to specifi c sections and infographics, where they’ll fi nd the information they need to think critically about the question.

Guiding Questions provide the framework for the end- of-chapter pedagogy, which includes references back to relevant infographics to help students answer the questions and prepare for exams.

1

2

3

4

219PA L M P L A N E T

What role does isolation play in a species’ vulnerability to extinction? How do habitat destruction and fragmentation threaten species?

How can we acquire the food, fiber, fuel, and pharmaceutical resources we need without damaging the ecosystems that provide those resources?

What are biodiversity hotspots, and why are they important?

In the past two decades, more than 20 million acres of rain forest have been cleared and planted as oil palm plantations JAMES P. BLAIR/ National Geographic Creative

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What role does isolation play in a species’ vulnerability to extinction? How do habitat destruction and fragmentation threaten species?

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4 ENVIRONMENTAL LITERACY UNDERSTANDING THE ISSUE What is biodiversity, and why is it important? How many species are estimated to live on Earth, and which taxonomic groups have the most species?

INFOGRAPHICS 12.1 AND 12.2

1. Give a basic definition of biodiversity.

2. The total number of different species on Earth: a. is unknown, but insects are the most numerous species. b. is a few million, mostly bacteria and fungi. c. is more than 20 million, with half of them being plants. d. is less than 1 million, mostly vertebrates.

3. Why is biodiversity loss a concern? a. It primarily occurs in the developed world, where most of the

world’s population lives. b. It increases the degree of endemism in an area. c. It primarily affects well-known and charismatic species like

elephants and orangutans. d. It disrupts ecological connections, potentially diminishing

ecosystem services.

How do genetic, species, and ecosystem diversity each contribute to ecosystem function and services?

INFOGRAPHIC 12.3

4. An example of species diversity might be: a. the wide variety of coloration and tail size in guppies. b. the diverse habitat types and organisms inhabiting a deep lake,

its edges, and the surrounding meadow and forest areas. c. the many different species inhabiting a swamp. d. None of the above.

5. True or False: As ecosystem diversity increases, so does species diversity.

6. All apples belong to the species Malus domestica. The wide variety of apples available in the produce department of your local grocery store is an example of __________________ diversity.

What are biodiversity hotspots, and why are they important?

INFOGRAPHIC 12.4

7. True or False: Biodiversity hotspots are areas with many endemic species that are well protected and not threatened with endangerment.

8. A species that naturally occurs in only one place is called: a. an endangered species. b. a hotspot species. c. an endemic species. d. a threatened species.

What role does isolation play in a species’ vulnerability to extinction? How do habitat destruction and fragmentation threaten species?

INFOGRAPHICS 12.5 AND 12.6

9. The leading human cause of species endangerment is ______________________ ______________________.

10. Why are many of the biodiversity hotspots around the world on islands?

a. Islands accumulate species from many different areas. b. Populations of island species are isolated. c. Islands have more diverse habitats. d. There are more niches on islands.

11. Why are isolated populations more vulnerable to extinction than populations that are not isolated from each other?

How can we acquire the food, fiber, fuel, and pharmaceutical resources we need without damaging the ecosystems that provide those resources?

TABLE 12.1

12. Evaluate the trade-offs of using palm oil as a replacement for trans fats and make a recommendation regarding our future path that considers economic, environmental, and societal needs.

13. How can you, as an individual, help maintain biodiversity worldwide? Justify your choices.

1 3

2

4

5

What role does isolation play in a species’ vulnerability to extinction? How do habitat destruction and fragmentation threaten species?

INFOGRAPHICS 12.5 AND 12.6

9. The leading human cause of species endangerment is ______________________ ______________________.

10. Why are many of the biodiversity hotspots around the world on islands?

a. Islands accumulate species from many different areas. b. Populations of island species are isolated. c. Islands have more diverse habitats. d. There are more niches on islands.

11. Why are isolated populations more vulnerable to extinction than populations that are not isolated from each other?

4

pg 246

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F

REVISED, LEARNING-FRIENDLY TABLE OF CONTENTS

FOOD RESOURCES

CHAPTER 16 FEEDING THE WORLD 298 A GENE REVOLUTION

CHAPTER 17 SUSTAINABLE AGRICULTURE: RAISING CROPS 316 FARMING LIKE AN ECOSYSTEM

CONVENTIONAL ENERGY: FOSSIL FUELS

CHAPTER 18 COAL 338 BRINGING DOWN THE MOUNTAIN

CHAPTER 19 OIL AND NATURAL GAS 360 THE BAKKEN OIL BOOM

AIR POLLUTION: CONSEQUENCES OF USING FOSSIL FUELS

CHAPTER 20 AIR POLLUTION 381 THE YOUNGEST SCIENTISTS

CHAPTER 21 CLIMATE CHANGE 402 WHEN THE TREES LEAVE

CO S

In the past two decades, more than 20 million acres of rainforest—primarily in Indonesia— have been cleared and planted as palm oil plantations. Chapter 12 dives into the Trade-Offs associated with this new, ubiquitous ingredient, and how we might use sustainable practices to keep our palm oil, and rainforests too.

An oil boom is transforming sleepy towns into overcrowded, bustling, urban hubs. To access the oil, the industry is using a new kind of technology called fracking. Chapter 19 delves into the impacts, both social and environmental, of this new way of harvesting oil.

THE MOST CURRENT STORIES IN ENVIRONMENTAL SCIENCE. BRAND

NEW STORIES IN THIS EDITION:

WHAT’S NEW

A patch of the Gulf of Mexico the size of Connecticut is plagued by low-oxygen waters—conditions that threaten wildlife and the local economy. Researchers profi led in Chapter 15 have been working tirelessly to pinpoint the oxygen- depleting culprit and come up with ways we might help the Gulf breathe again.

ONE UNIFIED BOOK THAT COVERS THE MOST ESSENTIAL CONTENT IN THE COURSE

CHAPTER 12

CHAPTER 19

CHAPTER 15

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218 C H A P T E R 12 : B I O D I V E R S I T YC H A P T E R 1: E N V I R O N M E N TA L L I T E R A C Y218

C H A PT E R 1 2 B I O D I V E R S I T Y

PALM PLANET

What is biodiversity, and why is it important? How many species are estimated to live on Earth, and which taxonomic groups have the most species?

How do genetic, species, and ecosystem diversity each contribute to ecosystem function and services?

1 2AFTER READING THIS CHAPTER, YOU SHOULD

BE ABLE TO ANSWER THE FOLLOWING

GUIDING QUESTIONS

CORE MESSAGE The variety of life on Earth is

tremendous. This biodiversity provides important ecological

services to ecosystems; we depend on these services for

things like food, medicine, and economic development. The

decline of biodiversity has serious ramifications for other species

as well as human well-being, so we should evaluate actions that

threaten biodiversity and take steps to reduce the impact when possible.

Can we have tropical forests and our palm oil too?

219PA L M P L A N E T

What role does isolation play in a species’ vulnerability to extinction? How do habitat destruction and fragmentation threaten species?

How can we acquire the food, fiber, fuel, and pharmaceutical resources we need without damaging the ecosystems that provide those resources?

What are biodiversity hotspots, and why are they important?

In the past two decades, more than 20 million acres of rain forest have been cleared and planted as oil palm plantations JAMES P. BLAIR/ National Geographic Creative

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NEW WAYS OF EMPOWERING SCIENCE LEARNING

A LEARNING PATH AT THE BEGINNING OF EACH CHAPTER HOMES STUDENT ATTENTION TO THE CORE MESSAGE AND GUIDING QUESTIONS.

KEY CONCEPTS ALERT STUDENTS TO SALIENT TAKE-HOME MESSAGES WITHIN THE CHAPTER TEXT AND ENFORCE THE GUIDING QUESTIONS.

EACH INFOGRAPHIC IS TAGGED TO A GUIDING QUESTION—THE CONTENT

IN THE FIGURE HELPS STUDENTS ANSWER THE QUESTION. NEW

CRITICAL THINKING QUESTIONS HAVE BEEN ADDED TO EACH FIGURE

IN THE BOOK.

NEW PRACTICE QUESTIONS IN THE END-OF-CHAPTER MATERIAL TEACH EACH GUIDING QUESTION.

27 1PA L M P L A N E T

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Many hotspots are in tropical areas, but some are also found in areas further north and south of the equator. Why do you suppose so many non-tropical coastal areas are biodiversity hotspots?

TERRESTRIAL AQUATIC

Malaysia

Sumatra

TROPICAL ANDES 15,000 endemic plants, 487 threatened species, 2 extinct

POLYNESIA-MICRONESIA 3,074 endemic plants, 99 threatened species, 43 extinct

GUINEAN FORESTS 1,800 endemic plants, 115 threatened species, 0 extinct

INDO-MALAYAN ARCHIPELAGO 15,000 endemic plants, 162 threatened species, 4 extinct

INFOGRAPHIC 12.4 BIODIVERSITY HOTSPOTS 3

Biodiversity hotspots, areas with high numbers of endemic but endangered species, cover a small percentage of land and water areas but hold more than 40%–50% of all plant and vertebrate endemic animal species. Most hotspots are located in tropical biomes or in isolated terrestrial ecosystems, such as mountains or islands. Even small disturbances, such as a small farm plot or road that cuts through the area, can threaten endemic species that populate specialized niches in these hotspots.

cal forests tend to be particularly flush with both gical and species diversity, thanks largely to the dant sunlight and climatic conditions conducive wth. The forests that are currently being laid

n Sumatra are no tion. They have left unhampered for ny millennia that steamy amphibious stems swarm with

nucopia of life: ants, orangutans, , tigers, and every er of bird and beetle

uman imagination thom. “The truth one has any idea

many species used to ere,” Sutherlin says. the species in these s have yet to be described ence.”

stunning example w ecological diversity

biodiversity, researchers

instrumental value An object’s or species’ worth, based on its usefulness to humans.

Protecting biodiversity hotspots, areas with

high numbers of endangered endemic

species, can be a cost- effective way to protect

a large number of endangered species.

KEY CONCEPT 12.4

280 C H A P T E R 12 : B I O D I V E R S I T Y

ENVIRONMENTAL LITERACY UNDERSTANDING THE ISSUE

What is biodiversity, and why is it important? How many species are estimated to live on Earth, and which taxonomic groups have the most species?

INFOGRAPHICS 12.1 AND 12.2

1. Give a basic definition of biodiversity.

2. The total number of different species on Earth: a. is unknown, but insects are the most numerous species. b. is a few million, mostly bacteria and fungi. c. is more than 20 million, with half of them being plants. d. is less than 1 million, mostly vertebrates.

3. Why is biodiversity loss a concern? a. It primarily occurs in the developed world, where most of the

world’s population lives. b. It increases the degree of endemism in an area. c. It primarily affects well-known and charismatic species like

elephants and orangutans. d. It disrupts ecological connections, potentially diminishing

ecosystem services.

How do genetic, species, and ecosystem diversity each contribute to ecosystem function and services?

INFOGRAPHIC 12.3

4. An example of species diversity might be: a. the wide variety of coloration and tail size in guppies. b. the diverse habitat types and organisms inhabiting a deep lake,

its edges, and the surrounding meadow and forest areas. c. the many different species inhabiting a swamp. d. None of the above.

5. True or False: As ecosystem diversity increases, so does species diversity.

6. All apples belong to the species Malus domestica. The wide variety of apples available in the produce department of your local grocery store is an example of __________________ diversity.

What are biodiversity hotspots, and why are they important?

INFOGRAPHIC 12.4

7. True or False: Biodiversity hotspots are areas with many endemic species that are well protected and not threatened with endangerment.

8. A species that naturally occurs in only one place is called: a. an endangered species. b. a hotspot species. c. an endemic species. d. a threatened species.

What role does isolation play in a species’ vulnerability to extinction? How do habitat destruction and fragmentation threaten species?

INFOGRAPHICS 12.5 AND 12.6

9. The leading human cause of species endangerment is ______________________ ______________________.

10. Why are many of the biodiversity hotspots around the world on islands?

a. Islands accumulate species from many different areas. b. Populations of island species are isolated. c. Islands have more diverse habitats. d. There are more niches on islands.

11. Why are isolated populations more vulnerable to extinction than populations that are not isolated from each other?

How can we acquire the food, fiber, fuel, and pharmaceutical resources we need without damaging the ecosystems that provide those resources?

TABLE 12.1

12. Evaluate the trade-offs of using palm oil as a replacement for trans fats and make a recommendation regarding our future path that considers economic, environmental, and societal needs.

13. How can you, as an individual, help maintain biodiversity worldwide? Justify your choices.

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Habitat loss is currently the main driver of species endangerment and extinction, but habitat loss need not be complete to cause a problem; habitat fragmentation may also be an insurmountable problem for some species. Islands that are created when a river is dammed to form a reservoir provide instant habitat fragments. Luke Gibson and his team evaluated the number of small mammal species in large (10–56 hectares [25–140 acres]) and small (<10 hectares [<25 acres]) forested islands in Chiew Larn Reservoir of Thailand. Island sampling was done shortly after the reservoir was formed (about 6 years after isolation); the islands were sampled again about 26 years after isolation. Their results are below. (For comparison, on average, nine species were found on mainland (pre-reservoir) plots; the richness did not change in this mainland forest over the study period.)

SCIENCE LITERACY WORKING WITH DATA

Island Area of Island (hectares) Species Richness

(6 years) Species Richness

(26 years)

Large islands

6 56.3 12 5

5 12.1 9 3

9 10.4 7 1

Small islands

28 4.7 2 2

7 1.9 3 2

33 1.7 1 1

3 1.4 2 1

41 1.1 3 1

39 1.0 3 1

40 0.8 2 1

2 0.4 2 1

16 0.3 2 1

Interpretation

1. Before evaluating the data, draw a graph that compares species richness of large islands 6 years after isolation versus 26 years after isolation and that also shows the same for small islands. (Hint: Calculate the average species richness values for each group and draw a bar graph that allows you to directly compare the richness of large islands after both sampling periods to the richness of small islands after both sampling periods.)

2. Consider that species richness before isolation was nine. How does the species richness compare in large islands before isolation (use “mainland” data), 6 years after isolation, and 26 years after isolation? How does it compare for the small islands over those two sampling periods?

Advance your Thinking

3. What might lead to the difference in species richness losses in large islands compared to small islands?

4. On all of the islands, the most common (and sometimes only) small mammal 26 years after isolation was a non-native rat. Could this have had an influence on the loss of the other, native species? Explain.

5. What conclusion can be drawn regarding the value of leaving behind fragmented forest landscapes for protecting species that live in the habitat fragments?

Number of Small Mammal Species (Richness) Found on Islands 6 and 26 Years after Isolation

Visit the World Wildlife Fund (WWF) website (www.worldwildlife. org). Explore the website to learn about the organization and their work to protect endangered species.

1. What is the mission of the WWF? How do you know this?