Year Birth rate Death rate Rate of increase (r) Birth or death rate per 1,000 population

Copyright © 2009 Pearson Education, Inc.  Population momentum of Mexico 36.9 The human population continues to increase, but the growth rate is slowing

Age Male Female Population in millions Total population size = 68,347,479 Population in millions Total population size = 106,202,903 FemaleMale Female Male Population in millions Total population size = 135,172,

Age Population in millions Total population size = 68,347, Male Female

Age Population in millions Total population size = 106,202,903 Female Male 2005

Age Female Male Population in millions Total population size = 135,172,155

Copyright © 2009 Pearson Education, Inc CONNECTION: Age structures reveal social and economic trends  Age structure diagram –Reveals a population’s growth trends

Age 1980 Birth years Male Female Birth years Male Female Birth years Male Female 80+ before 1900 before 1926 before Population in millions Total population size = 363,811,435 Population in millions Total population size = 295,734, Population in millions Total population size = 227,726,463

1980 Age Birth years Male Female before Population in millions Total population size = 227,726,463

Age Birth years Male Female Population in millions Total population size = 295,734,134 before

Age Birth years Male Female Population in millions Total population size = 363,811, before

Copyright © 2009 Pearson Education, Inc CONNECTION: An ecological footprint is a measure of resource consumption  U.S. Census Bureau projection –8 billion people within the next 20 years –9.5 billion by mid-21st century

Copyright © 2009 Pearson Education, Inc.  Ecological footprint helps understand resource availability and usage  The United States has a –Big ecological footprint –Large ecological deficit CONNECTION: An ecological footprint is a measure of resource consumption

North America Europe Asia Africa > 5.4 global ha per person 3.6–5.4 global ha per person 1.8–3.6 global ha per person 0.9–1.8 global ha per person < 0.9 global ha per person Insufficient data South America Australia

Few large offspring, low mortality until old age Many small offspring, high mortality Percentage of maximum life span Percentage of survivors III II I

G = rN (K  N)(K  N) K

Time Birth or death rate IIIIVI II

Copyright © 2009 Pearson Education, Inc. You should now be able to 1.Explain the factors that determine the characteristics of a population 2.Describe exponential growth and the factors that produce logistic growth of a population 3.Explain the limiting factors that influence population growth 4.Distinguish between r- and K-strategies 5.Describe and give examples of the different types of life histories

Copyright © 2009 Pearson Education, Inc. 6.Explain the factors the determine human population growth 7.Describe the concept of ecological footprint You should now be able to