Ch. 4 Flashcards Preview

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Flashcards in Ch. 4 Deck (12):
0

population density

number of organisms per unit area

1

dispersion

pattern of spacing of a population within an area

2

density-independent factor

any factor in the environment that doesn't depend on the number of members in a population per unit area

3

density-dependent factor

any factor in the environment that depends on the number of members in a population per unit area

4

population growth rate

explains how fast a given population grows

5

emigration

describes the number of individuals moving away from a population

6

immigration

describes number of individuals moving into a population

7

carrying capacity

maximum number of individuals in a species hag an environment can support for the long term

8

demography

study of human population size density distribution movement and birth/ death rates

9

demographic transition

Change in population from high birth and death rates to low birth r and death rates

10

zero population growth

occurs when birth plus immigration equals drag plus emigration

11

age structure

number of males and females on each of three age groups: pre-reproductive stage, reproductive stage, and post-reproductive stage