Lecture 31-Population Ecology Flashcards Preview

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Flashcards in Lecture 31-Population Ecology Deck (44)
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What is population ecology?

The study of populations in relation to their environment

1

A group of individuals of a single species living in the same general area.

Population

2

Population ecology studies how biotic and abiotic factor influence what?

Density, distribution, size, and age structures of populations

3

The number of individuals per unit area or volume.

Population density

4

Population density is typically __________.

Estimated

5

Population dynamics deal with __________ and __________ within a population.

Addition, removal

6

Addition:

Birth and immigration

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Removal:

Death and emigration

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Addition = population __________.

Influx

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Removal = population __________.

Outflux

10

What is population size affected by?

Birth, death, immigration, and emigration

11

Change in population size (N) during time interval (t) =

(Births + immigration) - (Deaths + emigration)

12

Average # per individual.

Per capita

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Per capita birth rate equation:

B = bN

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Per capita death rate equation:

D = mN

15

Per capita rate of increase equation:

r = b - m

16

Different populations exhibit different __________ __________.

Distribution patterns

17

The pattern of spacing among individuals within the boundaries of the population.

Dispersion

18

3 types of dispersion?

Clumped, uniform, and random

19

Aggregated in patches.

Clumped

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Evenly distributed; result of antagonistic social interactions (territoriality).

Uniform

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Position of individuals independent of others.

Random

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Most common dispersion pattern:

Clumped

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The maximum population size that a particular environment can sustain.

Carrying capacity (K)

24

What can carrying capacity be shaped by?

Energy, shelter, refuge from predators, nutrient availability, water, and suitable nesting sites

25

The study of vital statistics of populations and how they can change over time.

Demography

26

The data used in demography is captured through:

Census, mark-and-recapture, and sampling

27

Age-specific summaries of survival patterns of populations.

Life tables

28

Shows rate of survivorship for a cohort/population.

Survivorship curve

29

Describe a Type I curve.

Low death rates during early and middle life, and then curve down sharply among older age groups.