Chapter 44 Population Ecology

Question 1

What kind of experiments don’t require the manipulation of variables?

Answer 1

Natural Experiments.

Question 2

What is a geographic range?

Answer 2

Overall spatial boundaries within which a population lives.

Question 3

What is a habitat?

Answer 3

Specific region in a geographic range within which a population lives.

Question 4

What information can be inferred from knowing the population size and density?

Answer 4

Resources.

Question 5

What is 1 way to estimate a population size?

Answer 5

Capture-Recapture.

Question 6

How is density related to body mass?

Answer 6

Inversely.

Question 7

What is population dispersion?

Answer 7

Dispersion of population within a geographic range.

Question 8

What is the most common pattern of dispersion?

Answer 8

Clumped

Question 9

What is the most uncommon pattern of distribution?

Answer 9

Uniform.

Question 10

What are the 3 categories in age structure?

Answer 10

Prereproductive, reproductive, and postreproductive.

Question 11

What is generation time?

Answer 11

Avg time between individual born and its’ offspring.

Question 12

How is body size related to generation time?

Answer 12

Positively.

Question 13

What is demography?

Answer 13

Study of the factors that change population size and density.

Question 14

What are population growth factors?

Answer 14

Immigration and birth.

Question 15

What are population decline factors?

Answer 15

Emigration and death.

Question 16

What is the purpose of demography?

Answer 16

Predicts populations future growth.

Question 17

What is used to summarize information about demographics of a population?

Answer 17

Life tables.

Question 18

What is the term that referes to life time patterns of growth, maturation, and reproduction (Basic life)?

Answer 18

Life History.

Question 19

What kind of models are logistic and exponential?

Answer 19

Mathmatical.

Question 20

What is the per-capita exponential growth model equation?

Answer 20

dN/dt= rN

Question 21

What is the logistic growth equation?

Answer 21

dN/dt = rN(K-N)/K

Question 22

What happens to r when NK, and N=K?

Answer 22

r>0, r

Question 23

How can some populations exceed K?

Answer 23

Use stored energy.

Question 24

How does crowding affect a population?

Answer 24

Decreases adult size, survivorship, fecundity, and individual growth rates.

Question 25

What kind of factors increase and decreasing depending on the population?

Answer 25

Density Dependent

Question 26

What kind of population regulation only reduces the size of population?

Answer 26

Density independent.

Question 27

What are the two main life history patterns?

Answer 27

r and K-selected species.

Question 28

What two factors control cyclic fluctuations?

Answer 28

Intrinsic and extrinsic.

Question 29

Do human populations now grow exponentially?

Answer 29

Yes.

Question 30

What is the average r value for human growth?

Answer 30

0.0126

Question 31

What kind model shows the relationship between countries population growth and economic development?

Answer 31

Demographic transition model.

Question 32

Having how many kids will lead to zero population growth?

Answer 32

2