Essentials of Ecology

116 CHAPTER 5 Biodiversity, Species Interactions, and Population Control Time Small herbs Lichens and and shrubs Exposed mosses ...

CONCEPT 5-4 117 burned or cut forests, heavily polluted streams, and land that has been flooded. In the soil that remains on dis ...

118 CHAPTER 5 Biodiversity, Species Interactions, and Population Control decomposers also change. A key point is that primary su ...

CONCEPT 5-4 119 Southern Sea Otters and Sustainabiliy Before the arrival of European settlers on the North American west coast, ...

120 CHAPTER 5 Biodiversity, Species Interactions, and Population Control REVIEW Review the Key Questions and Concepts for this ...

ACADEMIC.CENGAGE.COM/BIOLOGY/MILLER 121 LEARNING ONLINE ing and research. These include flash cards, practice quiz- zing, Weblin ...

CORE CASE STUDY Many argue that both population growth and resource con- sumption per person are important causes of the environ ...

Human Population Growth Continues but It Is Unevenly Distributed For most of history, the human population grew slowly (Figure 1 ...

124 CHAPTER 6 The Human Population and Its Impact SCIENCE FOCUS How Long Can the Human Population Keep Growing? duction has grow ...

CONCEPTS 6-2A AND 6-2B 125 ■✓ world’s developed countries, growing at 0.1% a year. About 80.8 million were added to developing c ...

126 CHAPTER 6 The Human Population and Its Impact number of people leaving a population (through death and emigration) from the ...

CONCEPTS 6-2A AND 6-2B 127 first 100 million people, 52 years to add another 100 million by 1967, and only 39 years to add the t ...

128 CHAPTER 6 The Human Population and Its Impact Several Factors Affect Birth Rates and Fertility Rates Many factors affect a c ...

CONCEPTS 6-2A AND 6-2B 129 tion, better nutrition, medical advances such as immu- nizations and antibiotics, improved sanitation ...

130 CHAPTER 6 The Human Population and Its Impact ■✓ Between 1820 and 1960, most legal immigrants to the United States came from ...

CONCEPT 6-3 131 years. In developing countries, the percentage is even higher: 30% on average (41% in Africa) compared with 17% ...

132 CHAPTER 6 The Human Population and Its Impact has been called the graying of America. In 2008, about 13% of Americans were 6 ...

CONCEPT 6-4 133 structure. According to the World Health Organiza- tion, AIDS had killed 25 million people by 2008. Unlike hunge ...

134 CHAPTER 6 The Human Population and Its Impact insufficient financial capital, large debts to developed countries, and a drop ...

CONCEPT 6-4 135 One of the conference’s goals was to encourage action to stabilize the world’s population at 7.8 billion by 2050 ...