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Population Growth Activities Number your paper #1-14 Write down DI for Density-Independent Growth Factor or DD for Density-Dependent Growth Factor 1. Freezing Weather 2. Has a greater effect on a larger population 3. A volcanic eruption 4. Predation 5. Floods 6. Food Supply 7. May limit the population before it even gets close to its carrying capacity. 8. Disease or parasites 9. Decreases when the population is below carrying capacity, increases when the population exceeds carrying capacity 10. Fire 11. Intensity of effect no greater for larger population, no less for smaller population 12. Clear-cut examples are not often seen in nature. 13. May cause cyclical changes in lynx and hare populations 14. Storms 1. Freezing Weather •DI 2. Has a greater effect on a larger population •DD 3. A volcanic eruption •DI 4. Predation •DD 5. Floods •DI 6. Food Supply •DD 7. May limit the population before it even gets close to its carrying capacity. •DI 8. Disease or parasites •DD 9. Decreases when the population is below carrying capacity, increases when the population exceeds carrying capacity •DD 10. Fire •DI 11. Intensity of effect no greater for larger population, no less for smaller population •DI 12. Clear-cut examples are not often seen in nature. •DD 13. May cause cyclical changes in lynx and hare populations •DD 14. Storms •DI 15. A particular species of tropical fish has only a few offspring and takes care of them for an extended period. We might also expect the fish population • A. to be controlled mostly be density-independent factors • B. to show exponential growth • C. to live in a harsh environment • D. to start reproducing very young • E. to be relatively stable, near carrying capacity 16. Chimpanzees have a relatively low birth rate. They take good care of their young, and most chimps live a long life. The chimp survivorship curve would look like • A. a line that slopes gradually upward • B. a relatively flat line that drops steeply at the end • C. a line that drops steeply at first, then flattens out • D. a line that slopes gradually downward • E. a horizontal line 17. Locust populations go through periods of sudden explosive growth, followed by sudden decline in numbers. Their numbers are probably regulated by • A. predation • B. density-dependent factors • C. logistic growth • D. random dispersion • E. density-independent factors 18. Sea gulls fiercely defend the areas around their nests in their clifftop breeding colonies. Within the colony they would show a ___ dispersion pattern. • A. uniform • B. random • C. dense • D. density-independent • E. clumped 19. A wildlife biologist is trying to predict what will happen to a bear population if bear hunting is banned. He had the equations all worked out but then realized that he had grossly underestimated the amount of food available to the bears. To make his predictions more acurate, he will have to go back to his equations and • A. decrease N • B. increase N • C. decrease K • D. increase K • E. decrease r 20. An ecologist would suspect a population is growing rapidly if it • A. contains more prereproductive than reproductive individuals • B. is near its carrying capacity • C. is limited only by densitydependent factors • D. shows a clumped pattern of dispersion • E. is far below its carrying capacity 21. An oak tree produces thousands of acorns, but very few grow into mature oak trees. The oak tree exhibits a ___ survivorship curve. • A. Type I • B. Type II • C. Type III • D. Type I or II • E. Type I or III 22. When birth rate equals death rate • A. a population grows rapidly • B. the size of a population remains constant • C. density-dependent limiting factors do not affect the population • D. a population is in danger of extinction • E. a population goes through up and down cycles 23. If you wanted to see what percentage of the population of Thailand is under 10 years old, you could look at • A. a logistic curve for the population • B. the population’s age structure • C. a life table for the population • D. a plot of population density • E. the population’s survivorship 24. To determine the density of a rabbit population, you would need to know the number of rabbits and • A. the factors that limit population growth • B. their birth rate • C. the area in which they live • D. their population growth rate • E. their pattern of dispersion 15. A particular species of tropical fish has only a few offspring and takes care of them for an extended period. We might also expect the fish population • A. to be controlled mostly be density-independent factors • B. to show exponential growth • C. to live in a harsh environment • D. to start reproducing very young • E. to be relatively stable, near carrying capacity 16. Chimpanzees have a relatively low birth rate. They take good care of their young, and most chimps live a long life. The chimp survivorship curve would look like • A. a line that slopes gradually upward • B. a relatively flat line that drops steeply at the end • C. a line that drops steeply at first, then flattens out • D. a line that slopes gradually downward • E. a horizontal line 17. Locust populations go through periods of sudden explosive growth, followed by sudden decline in numbers. Their numbers are probably regulated by • A. predation • B. density-dependent factors • C. logistic growth • D. random dispersion • E. density-independent factors 18. Sea gulls fiercely defend the areas around their nests in their clifftop breeding colonies. Within the colony they would show a ___ dispersion pattern. • A. uniform • B. random • C. dense • D. density-independent • E. clumped 19. A wildlife biologist is trying to predict what will happen to a bear population if bear hunting is banned. He had the equations all worked out but then realized that he had grossly underestimated the amount of food available to the bears. To make his predictions more acurate, he will have to go back to his equations and • A. decrease N • B. increase N • C. decrease K • D. increase K • E. decrease r 20. An ecologist would suspect a population is growing rapidly if it • A. contains more prereproductive than reproductive individuals • B. is near its carrying capacity • C. is limited only by densitydependent factors • D. shows a clumped pattern of dispersion • E. is far below its carrying capacity 21. An oak tree produces thousands of acorns, but very few grow into mature oak trees. The oak tree exhibits a ___ survivorship curve. • A. Type I • B. Type II • C. Type III • D. Type I or II • E. Type I or III 22. When birth rate equals death rate • A. a population grows rapidly • B. the size of a population remains constant • C. density-dependent limiting factors do not affect the population • D. a population is in danger of extinction • E. a population goes through up and down cycles 23. If you wanted to see what percentage of the population of Thailand is under 10 years old, you could look at • A. a logistic curve for the population • B. the population’s age structure • C. a life table for the population • D. a plot of population density • E. the population’s survivorship 24. To determine the density of a rabbit population, you would need to know the number of rabbits and • A. the factors that limit population growth • B. their birth rate • C. the area in which they live • D. their population growth rate • E. their pattern of dispersion