Chapter 7

Question 1

population growth rate

Answer 1

change in population size over time (births - deaths over specific time period)

Question 2

population

Answer 2

all individuals of species that live in same geographic area and are able to interact and interbreed

Question 3

population dynamics

Answer 3

changes over time of population size and composition

Question 4

minimum viable population

Answer 4

smallest # of individuals that would still allow population to persist and grow, ensuring long term survival.

Question 5

Evaluation of positive & negative impacts of proposed environmental action, including alternative actions

Answer 5

Environmental impact statement

Question 6

of individuals per unit area

Answer 6

Population density

Question 7

Location & spacing of individuals within their range

Answer 7

Population distribution

Question 8

Individuals found in groups or patches within habitat

Answer 8

Clumped distribution

Question 9

Individuals spread out irregularly with no pattern

Answer 9

Random distribution

Question 10

Individuals spaced evenly, due to territorial behavior or mechanisms for suppressing growth of nearby individuals

Answer 10

Uniform distribution

Question 11

Elk stay in herds. Example of

Answer 11

Clumped distribution

Question 12

Seeds that germinate where they fall - example of

Answer 12

Random distribution

Question 13

Creosote bush produces toxins that prevent other bushes from growing close by, example of

Answer 13

Uniform distribution

Question 14

of births / 1000 / year

Answer 14

Birth rate

Question 15

of deaths / 1000 / year

Answer 15

Death rate

Question 16

Maximum rate population can grow due to births if everyone survives & reproduces

Answer 16

Biotic potential (r)

Question 17

Population progressively larger each breeding cycle; J curve when plotted over time

Answer 17

Exponential growth

Question 18

Population size increases rapidly at first, slows as population becomes larger, S curve when plotted over time

Answer 18

Logistic growth

Question 19

Population size a particular environment can support indefinitely w/o long term damage

Answer 19

Carrying capacity (k)

Question 20

Factors whose impact on population increases as population goes up. (Disease)

Answer 20

Density dependent

Question 21

Factors whose impact on population not related to population size (storm, avalanche)

Answer 21

Density independent

Question 22

How quickly population can potentially increase, reflecting biology o the species (life span, fecundity, maturity rate)

Answer 22

Reproductive strategies

Question 23

Species - high biotic potential, & share characteristics such as short lifespan, early maturity, high fecundity

Answer 23

R-selected species

Question 24

Capacity to produce young in great numbers

Answer 24

Fecundity

Question 25

Species - low biotic potential, share characteristics such as long lifespan, late maturity, low fecundity, logistic population growth

Answer 25

K-selected species

Question 26

Larger herds result in more competition for food.

Example of density _____ factor that affects population size

Answer 26

Density dependent

Question 27

Infectious diseases spread more easily in large populations of animals. Example of density _____

Answer 27

Density dependent

Question 28

Predators - easier to capture prey from larger populations.

Example of density _____

Answer 28

Density dependent

Question 29

Fires / floods affect population

Density _____

Answer 29

Density independent

Question 30

Storms affect populations

Density _____

Answer 30

Density independent

Question 31

Avalanche or other natural disasters affect population size

Density _____

Answer 31

Density independent

Question 32

Fluctuations - population size that produce very large population followed by crash that lowers the population size drastically, followed again by increase & then crash

Answer 32

Boom & bust cycle

Question 33

Local extinction of a species

Answer 33

Extirpation