Chapter 4 Test Flashcards Preview

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Flashcards in Chapter 4 Test Deck (33)
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1
Q

population density

A

number of organisms per unit area (how crowded something is)

2
Q

Distribution

A

how things are dispersed

3
Q

Dispersion

A

arrangement of population in their environment

4
Q

what are the three kinds of dispersion?

A

uniform, clumped, random

5
Q

Uniform

A

the same, consistently found

6
Q

Examples of uniform dispersion

A

Bears, bobcats, tigers, territorial animals

7
Q

Examples of clumped dispersion

A

school of fish, ants, herds of bison, flocks of geese

8
Q

Examples of random dispersion

A

Spiders, squirrels, rabbits, deer

9
Q

Examples of uniform and clumped dispersion

A

pride of lions, pack of hyenas

10
Q

population ranges

A

where it lives–is the range of tolerance

11
Q

population limiting factors

A

factors that limit where an organism can live

12
Q

how many types of limiting factors are there?

A

2 types

13
Q

what are the two types of limiting factors?

A

density-independent factors and density-dependent factors

14
Q

Density-independent factors

A

do not depend on population (abiotic factors)

15
Q

Density-dependent factors

A

Density-dependent factors- do depend on population (biotic factors)

16
Q

examples of density-independent factors

A

any kind of weather…precipitation, wind, temp, humidity

17
Q

examples of density-dependent factors

A

disease, competition, parasites, etc.

18
Q

Population Growth Rate (PGR)

A

How fast a population grows/reduces

19
Q

What are the four factors in PGR?

A

Natality, mortality, immigration, emigration

20
Q

Natality

A

birth rate in a time period

21
Q

mortality

A

death rate

22
Q

immigration

A

into a population

23
Q

emigration

A

exiting a population

24
Q

Lag Phase

A

no to very little growth over a long period of time

25
Q

Exponential growth

A

growth rate is proportional to to the size of the population

26
Q

when exponential growth is happening, what does the species NOT have to worry about?

A

limiting factors

27
Q

Logistic Growth Model

A

the growth rate slows when reaching carrying capacity

28
Q

Carrying capacity

A

size of the population and limiting factors/resources determine carrying capacity

29
Q

reproductive patterns

A

Different species have different reproductive patterns

30
Q

R-strategists

A

Generally smaller organisms
Short life span
Produces many offspring
Low survival rate

31
Q

K-strategists

A

Generally larger organisms
Long life span
Produces few offspring
High survival rate

32
Q

examples of R-strategists

A

flies, some insects, sea turtles, some fish, most plants

33
Q

examples of K-strategists

A

whales, elephants, mice, most birds, etc.