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Population Dynamics

Explore the concepts of exponential growth, carrying capacity, density-dependent and density-independent factors, and demography in population dynamics. Learn about birth and death rates, age structure, immigration, and emigration.

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Population Dynamics

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  1. Population Dynamics

  2. Exponential growth- means that as a population gets larger, it also grows faster.( J-shape) • Straight line growth- a steady growth over time.

  3. Carrying capacity- the number of organisms of one species that an environment can support indefinitely.

  4. Density-dependent factors are things like competition, parasites, and food. • This is a type of limiting factor that is biotic. • Density-independent factors- affect all populations, regardless of their density. • This is a type of limiting factor that is abiotic like storms, floods, and droughts.

  5. Demography • Demography is the study of human populations growth characteristics.

  6. http://math.berkeley.edu/~galen/popclk.html

  7. Birth rate- the rate at which babies are born. • Death rate- the rate at which people die. • If the birth rate is higher than the death rate you have a growth rate. • If the birth rate is less than the death rate you have a population shrinkage (lower total population).

  8. Age structure graph- shows what percentage of the population falls in what age range.

  9. Immigration= into population (I=in) • Emigration = out of a population (E=Exit)

  10. ST. MATTHEW ISLAND

  11. #1 • Which of the following factors is density-dependent • Drought • Flood • Food • Wind speed

  12. #2 • When populations increase, resource depletion may result in _________. • Exponential growth • Straight-line growth • Competition • Increase in predators

  13. #3 • Storms, cold temperatures, and drought are all ____________. • Density dependent • Biotic factors • Exponential • Density independent

  14. #4 • Between A.D. 1 and A.D. 1650, the world’s population had a major dip because of ___________. • Fertility • Decreased death rate • Density-independent factors • Bubonic plague

  15. #5 • Which of the following environment would be more likely to have organisms that exhibit fast growth? • Hot deserts • Large, deep lakes • Prairies that often flood • Tropical rain forests

  16. #6 • A female’s fertility rate is the number of offspring she produces _________. • In a year • In a decade • By age 50 • Over her lifetime

  17. According to the graph, the growth rate of a housefly population Increases, then drops suddenly Increases, at a steady rate Increases rapidly Levels off after a certain amount of time #7

  18. #8 • A J-shaped growth curve indicates a population is experiencing____________. • Exponential growth • Exponential mortality • Straight line growth • Slight growth

  19. #9 • The highest level at which a population can be sustained is its ____________. • Exponential growth • Carrying capacity • Limiting factor • Death rate

  20. #10 http://www.glencoe.com/qe/qe136national.php?qi=4352&st=

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