Ch. 35 Population Dynamics Flashcards Preview

AP Biology > Ch. 35 Population Dynamics > Flashcards

Flashcards in Ch. 35 Population Dynamics Deck (21)
Loading flashcards...
1
Q

Population Dynamics

A

Changes in population size results from various forces that control and regulate populations over time

2
Q

Population

A

A group of interacting individuals belonging to one species and living in the same geographic area

3
Q

Population Density

A

of individuals of a species per Area/Volume

4
Q

Dispersion Pattern

A

Manner in which individuals in a population are spaced within their area

5
Q

Clumped (Dispersion)

A

Individuals aggregated in patches

- results from unequal distribution of resources)

6
Q

Uniform (Dispersion)

A

Individuals are evenly distributed

- results from interactions among individuals of a population

7
Q

Random (Dispersion)

A

Unpredictable dispersion

  • rare due to environment and social interaction
  • used for testings other dispersion
8
Q

Exponential Growth Model

A

A mathematical description of idealized, unregulated, population growth

9
Q

Intrinsic rate of increase

A

An organism inherent capacity to reproduce

10
Q

Population Limiting Factors

A

Environment factors that restrict population growth

11
Q

Logistics Growth Model

A

A mathematical description of idealized population growth that is restricted by limiting factors

12
Q

Carrying capacity

A

In a population, the # of individuals an environment can sustain

13
Q

Density - dependent Factors

A

A population limiting factor whose effects depend on population density

  • affect more individuals as # goes up
  • laboratory population, natural population
14
Q

Density - independent Factor

A

A population limiting factor whose occurrence/effects are not affected by population density

  • abiotic factors
  • affects same number no matter the population size
15
Q

Life Tables

A

A listing of survivals and deaths in a population in a particular time period and predictions of how long, on average, an individual of a given age will live

16
Q

Life History

A

A series of events from birth thru reproduction to death

17
Q

Opportunistic Life History

A

Usually small-bodied species that reproduce young and with many. Exponential population. Unpredictable environment w/ density independent.

18
Q

Equilibrial Life History

A

Large-bodied species mature later and produce few offspring but give care. Stable population size w/ near carrying capacity by density - density factors

19
Q

How is the growth of humans affected?

A

Agricultural sciences replacing hunter/gatherer society results in more birth and less death. Technology allow us to continue to grow and raise the carrying capacity.
Future: Level off smoothly w/ capacity, sharp decline, or increase and mass death

20
Q

Age Structure

A

Proportion of individuals in different age groups

21
Q

Geographic shift

A

A change in the population’s geographic range relative to a change in some environmental factor