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Flashcards in Chapter 53 Deck (31):
1

the number of individuals per unit area or volume

Density

2

A pattern of spacing among individuals within boundaries of a population

Dispersion

3

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

When studying individuals who move around

4

Population density is determined through ____ and ____

Birth and immigration

5

Population density is determined by losses through

Deaths and emigration

6

Common patterns of dispersion

Clumped
Uniform
Random

7

Individuals or the same species born at the same time

Cohort

8

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

Survivorship curve

9

Three types of survivorship curves

See chapter notes

10

Exponential growth equation

Dn/dt=rmaxN

11

Exponential growth graph

See chapter notes

12

The max population size that a particular environment can sustain

Carrying capacity

13

Equation for logistic population growth

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

14

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

1

15

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

0

16

Logistic population growth graph

See chapter notes

17

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

Alee effect

18

The traits that affect an organisms schedule of reproduction and survived

Life history

19

Single large reproduction event

Semelparity

20

Repeated reproduction

Iteroperity

21

What kind of environment favors semelparity

Desert

22

What type of survivorship curve is likely associated with semelparity?

3

23

What type of curve is associated with iteroparity?

1

24

Organisms face trade offs between reproduction and

Survival

25

Organisms face trade offs between number and

Size

26

Under what circumstances does an organism face K-selection?

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

27

Density independent causes of death

Drought, stress, fire, etc..

28

Name four density dependent causes of death

Disease
Predators
Competition for resources
Toxic waste products

29

Are populations stable over time

No

30

Predator prey population relationship

See chapter notes

31

Multiple populations connected by immigration and emigration

Metapopulation