1. End Show Slide 1 of 21 Copyright Pearson Prentice Hall biology

2. End Show Slide 2 of 21 Copyright Pearson Prentice Hall 5-2 Limits to Growth

3. End Show 5-2 Limits to Growth Slide 3 of 21 Copyright Pearson Prentice Hall Limiting Factors What factors limit population growth?

4. End Show 5-2 Limits to Growth Slide 4 of 21 Copyright Pearson Prentice Hall Limiting Factors A Limiting Factor is something that is needed by an organism to survive that when it is in short supply the growth of a population decreases.

5. End Show 5-2 Limits to Growth Slide 5 of 21 Copyright Pearson Prentice Hall Limiting Factors A limiting nutrient is an example of a limiting factor.

6. End Show 5-2 Limits to Growth Slide 6 of 21 Copyright Pearson Prentice Hall Density-Dependent Factors A limiting factor that depends on population size is called a density-dependent limiting factor.

7. End Show 5-2 Limits to Growth Slide 7 of 21 Copyright Pearson Prentice Hall Density-Dependent Factors Density-dependent limiting factors include: competition predation parasitism Disease These factors operate most strongly when a population is large and dense.

8. End Show 5-2 Limits to Growth Slide 8 of 21 Copyright Pearson Prentice Hall Density-Dependent Factors Competition When populations become crowded, organisms compete for food, water space, sunlight and other essentials.

9. End Show 5-2 Limits to Growth Slide 9 of 21 Copyright Pearson Prentice Hall Density-Dependent Factors Predation Populations in nature are often controlled by predation. predator-prey relationship

10. End Show Slide 10 of 21 5-2 Limits to Growth Copyright Pearson Prentice Hall Density-Dependent Factors Wolf and Moose Populations on Isle Royale Moose Wolves

11. End Show 5-2 Limits to Growth Slide 11 of 21 Copyright Pearson Prentice Hall Density-Dependent Factors Parasitism and Disease Parasites can limit the growth of a population. A parasite lives in or on another organism (the host) and consequently harms it.

12. End Show 5-2 Limits to Growth Slide 12 of 21 Copyright Pearson Prentice Hall Density-Independent Factors Density-independent limiting factors affect all populations in similar ways regardless of the population size.

13. End Show 5-2 Limits to Growth Slide 13 of 21 Copyright Pearson Prentice Hall Density-Independent Factors Examples of density- independent limiting factors include: unusual weather natural disasters seasonal cycles certain human activities—such as damming rivers and clear-cutting forests

14. End Show - or - Continue to: Click to Launch: Slide 14 of 21 Copyright Pearson Prentice Hall 5-2

15. End Show Slide 15 of 21 Copyright Pearson Prentice Hall 5-2 A limiting factor that affects all populations in similar ways regardless of their size might be a.drought. b.disease. c.predation. d.crowding.

16. End Show Slide 16 of 21 Copyright Pearson Prentice Hall 5-2 Which of the following would be a limiting factor affecting the panda population of China? a.programs that educate people about endangered species b.capture of some pandas for placement in zoos c.laws protecting habitat destruction d.a disease that kills bamboo plants

17. End Show Slide 17 of 21 Copyright Pearson Prentice Hall 5-2 Density-dependent factors operate most strongly when a population is a.large and dense. b.large but sparse. c.small and sparse. d.small, but growing.

18. End Show Slide 18 of 21 Copyright Pearson Prentice Hall 5-2 Within a limited area, if the population of a predator increases, the population of its prey is likely to a.increase. b.decrease. c.remain about the same. d.become extinct.

19. End Show Slide 19 of 21 Copyright Pearson Prentice Hall 5-2 Which of the following is a density-independent factor affecting populations? a.predation b.disease c.a destructive hurricane d.parasites

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