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Chapter 13
Populations
Name:_______________
1. Define the Following:
a. Population ________________________________________________
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b. Individual ________________________________________________
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c. Death Rate ________________________________________________
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d. Immigration ________________________________________________
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e. Birth Rate ________________________________________________
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f. Emigration ________________________________________________
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g. Limiting Factor ______________________________________________
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h. Carrying Capacity ____________________________________________
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i. Abiotic Limiting Factor _______________________________________
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j. Biotic Limiting Factor _________________________________________
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k. Competition ________________________________________________
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l. Parasite ________________________________________________
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m. Host ________________________________________________
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n. Parasitism ________________________________________________
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o. Predator ________________________________________________
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p. Prey ________________________________________________
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q. Predation ________________________________________________
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r. Reproductive Rate ____________________________________________
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s. Exotic Species ______________________________________________
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t. Pesticide ________________________________________________
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u. Biological Control ___________________________________________
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2. What are the things you need to have in order to have a population? Pg 256
3. Explain why the following are incomplete descriptions of a population. Pg 256
a. 200 northern leopard frogs in Bow Valley Provincial Park
b. 25 woodland caribou in the Prairie Creek/ Red Rock Creek herd
c. 10 swift foxes in 1987
4. Calculate the rate of change per year for each of the following (256)
a. 30 grey wolves in a provincial park in 1930 and 15 wolves in the same
park in 1940
b. Four individual peregrine falcons in 1970 and 10 falcons nesting in the
same area in 1990.
5. What factors are responsible for the growth of a population? 258,259
6. What factors are responsible for the decline of a population? 258,259
7. How do environmental factors affect birth rate? 259
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8. Using the graph above, what conditions would you need for a population to grow
this way? Pg 260
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are needed to see this picture.
9. Using the graph above explain why growth slows down. What does the K stand
for? 260
10. Out of the 2 graphs you have just seen which is more like what we see in real life?
PG 260/261
11. What are abiotic limiting factors? 261
12. Identify one abiotic factor that would limit the growth of the following
organisms:261
a. Seedlings growing on the forest floor
b. Trees growing on a mountainside
c. Plants growing in a desert
13. What are biotic limiting factors?264/265
14. Identify the biotic limiting factors described in each scenario?264/265
a. A great horned owl regurgitates a pellet containing the skeletons of four
shrews. Owl pellets contain the parts of food that the owl could not digest.
b. Every three of four years, the population of lemming declines when their
food becomes scarce.
c. One species of tick, a blood-sucking animal, lives on the ears of moose.
d. A population of woodland caribou is controlled by a population of wolves.
15. What is reproductive rate? 267
16. How can humans affect ecosystems with exotic species? 268
17. Why might a biological control be better than a pesticide? Why might biological
controls backfire?
18. Look at the following graph. Explain why the wolf population seems to go up
after the moose population is high.
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