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Chapter 13 Populations Name:_______________ 1. Define the Following: a. Population ________________________________________________ ____________________________________________________________ ____________________________________________________________ b. Individual ________________________________________________ ____________________________________________________________ ____________________________________________________________ c. Death Rate ________________________________________________ ____________________________________________________________ ____________________________________________________________ d. Immigration ________________________________________________ ____________________________________________________________ ____________________________________________________________ e. Birth Rate ________________________________________________ ____________________________________________________________ ____________________________________________________________ f. Emigration ________________________________________________ ____________________________________________________________ ____________________________________________________________ g. Limiting Factor ______________________________________________ ____________________________________________________________ ____________________________________________________________ h. Carrying Capacity ____________________________________________ ____________________________________________________________ ____________________________________________________________ i. Abiotic Limiting Factor _______________________________________ ____________________________________________________________ ____________________________________________________________ j. Biotic Limiting Factor _________________________________________ ____________________________________________________________ ____________________________________________________________ k. Competition ________________________________________________ ____________________________________________________________ ____________________________________________________________ l. Parasite ________________________________________________ ____________________________________________________________ ____________________________________________________________ m. Host ________________________________________________ ____________________________________________________________ ____________________________________________________________ n. Parasitism ________________________________________________ ____________________________________________________________ ____________________________________________________________ o. Predator ________________________________________________ ____________________________________________________________ ____________________________________________________________ p. Prey ________________________________________________ ____________________________________________________________ ____________________________________________________________ q. Predation ________________________________________________ ____________________________________________________________ ____________________________________________________________ r. Reproductive Rate ____________________________________________ ____________________________________________________________ ____________________________________________________________ s. Exotic Species ______________________________________________ ____________________________________________________________ ____________________________________________________________ t. Pesticide ________________________________________________ ____________________________________________________________ ____________________________________________________________ u. Biological Control ___________________________________________ ____________________________________________________________ ____________________________________________________________ 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 QuickTime™ and a decompressor are needed to see this picture. 8. Using the graph above, what conditions would you need for a population to grow this way? Pg 260 QuickTime™ and a decompressor 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. QuickTime™ and a decompressor are needed to see this picture.