Chapter 53

Question 1

the number of individuals per unit area or volume

Answer 1

Density

Question 2

A pattern of spacing among individuals within boundaries of a population

Answer 2

Dispersion

Question 3

Under what circumstances would ecologists use the mark and recapture method?

Answer 3

When studying individuals who move around

Question 4

Population density is determined through ____ and ____

Answer 4

Birth and immigration

Question 5

Population density is determined by losses through

Answer 5

Deaths and emigration

Question 6

Common patterns of dispersion

Answer 6

Clumped
Uniform
Random

Question 7

Individuals or the same species born at the same time

Answer 7

Cohort

Question 8

A plot of the proportion or numbers in a cohort still alive at each age

Answer 8

Survivorship curve

Question 9

Three types of survivorship curves

Answer 9

See chapter notes

Question 10

Exponential growth equation

Answer 10

Dn/dt=rmaxN

Question 11

Exponential growth graph

Answer 11

See chapter notes

Question 12

The max population size that a particular environment can sustain

Answer 12

Carrying capacity

Question 13

Equation for logistic population growth

Answer 13

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

Question 14

If a population is very small then (K-N)/K is approximately equal to what?

Answer 14

1

Question 15

If a population reaches its carrying capacity, then (K-N)/K equals what?

Answer 15

0

Question 16

Logistic population growth graph

Answer 16

See chapter notes

Question 17

Individuals may have a more difficult time surviving or reproducing if the population size is too small

Answer 17

Alee effect

Question 18

The traits that affect an organisms schedule of reproduction and survived

Answer 18

Life history

Question 19

Single large reproduction event

Answer 19

Semelparity

Question 20

Repeated reproduction

Answer 20

Iteroperity

Question 21

What kind of environment favors semelparity

Answer 21

Desert

Question 22

What type of survivorship curve is likely associated with semelparity?

Answer 22

3

Question 23

What type of curve is associated with iteroparity?

Answer 23

1

Question 24

Organisms face trade offs between reproduction and

Answer 24

Survival

Question 25

Organisms face trade offs between number and

Answer 25

Size

Question 26

Under what circumstances does an organism face K-selection?

Answer 26

Factors that select for high carrying capacity Large Favor offspring with more parental supervision

Question 27

Density independent causes of death

Answer 27

Drought, stress, fire, etc..

Question 28

Name four density dependent causes of death

Answer 28

Disease Predators Competition for resources Toxic waste products

Question 29

Are populations stable over time

Answer 29

No

Question 30

Predator prey population relationship

Answer 30

See chapter notes

Question 31

Multiple populations connected by immigration and emigration

Answer 31

Metapopulation