Biology 12

480 MHR • Unit 5 Population Dynamics

SECTION REVIEW

1. Describe two main factors that significantly
   affect the population size of a particular species.


2. What is the birth rate of a population of 10 000
   individuals if 200 newborns are produced annually?


3. If ris less than zero, is the population
   increasing, decreasing, or staying the same?
   Explain your answer.


4. How could foresters or biologists use growth
   models of insect populations to better manage
   forests?


5. What are some of the factors that determine
   the biotic potential of a particular population?


6. Why do bacterial populations typically have
   non-overlapping generations and a replacement rate
   of R= 2?


7. Calculate the size of a population of annual plants
   five years in the future if the population starts with
   100 individuals and R= 10.


8. Calculate the size of a population with
   overlapping generations in 10 years, given a current
   population size of 5000 individuals and a growth
   rate of 0.04 individuals per capita per year.


9. On a single graph, draw a typical exponential
   growth curve and a logistic growth curve. On the
   correct curve, label the point at which the growth of
   one of these populations begins to slow down and
   the point at which it has reached the carrying
   capacity of the environment.
   10. Why does the rate of population growth
   increase as a population grows in size (at least up
   to a point)?
   11. What factors might contribute to the typically
   low population levels of giant pandas (Ailuropoda
   melanoleuca), despite an abundant food supply in
   their native habitat?
   12. Provide five examples of species that typically
   demonstrate logistic population growth patterns.
   13. Under what conditions would some species
   experience exponential growth?
   14. How might you determine how big a certain
   population will grow? Design a study that would
   allow you to decide whether the growth of a given
   population of mice (isolated in a field surrounded by
   roads) was logistic or exponential, and to determine
   how big the population might get.
   15. How might the size of a population of mice on
   an oceanic island be affected by the increase in
   global temperature that many scientists say occurs
   each year?

Growth of human populations is affected by many

environmental factors. How does Canada’s most pressing

environmental issue affect its human population growth?

Remember to include Canada’s human population growth

rate and prediction of growth in the final analysis.

UNIT ISSUE PREP

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Figure 14.16Accumulation of waste makes it more difficult

for a habitat to support additional population growth. What

does the amount of waste generated largely depend on?