Chapter 4 Flashcards

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1
Q

Population density

A

How crowded an area is

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2
Q

Dispersion

A

Pattern of spacing of a population within an area

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3
Q

Uniform

A

Same throughout an area

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4
Q

Uniform examples

A

Black bear, tiger, territorial animals

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5
Q

Clumped

A

Bunched together

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6
Q

Clumped examples

A

Herd animals, herbivore, bison

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7
Q

Random

A

No specific pattern

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8
Q

Random examples

A

White-tailed deer, squirrel

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9
Q

Density-independent factor

A

Abiotic, limiting factors that do not depend on population density

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10
Q

Density-independent factors examples

A

Weather events, fire

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11
Q

Density-dependent factors

A

Biotic, limiting factors that depend on population density

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12
Q

Density-dependent factor examples

A

Disease, competition

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13
Q

Population growth rate PGR

A

How fast a given population grows or shrinks

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14
Q

Natality

A

Birth rate

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15
Q

Mortality

A

Death rate

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16
Q

Immigration

A

Moving INTO a population

17
Q

Emigration

A

EXITING a population

18
Q

Lag phase

A

When the population is fighting for life before its fat and happy

19
Q

Exponential growth

A

No limiting factors being pushed onto the population “fat and happy, making babies” -weilert

20
Q

When does the exponential growth model happen?

A

When there no limited factors being pushed

21
Q

What is a logistic growth model?

A

Longer exponential growth model, eventually resources will be limited.

22
Q

Carrying capacity

A

How much of a population that Mother Nature can support long term

23
Q

Examples that make carrying capacity

A

Weather, populations, food, water

24
Q

Reproductive patterns

A

Vary depending on species, age, life span, reproduction cycle

25
Q

R-strategist

A

Organisms that do well in environments that change a lot

26
Q

R-strategist examples

A

Fly, zebra mussel, sea turtle

27
Q

K-strategist

A

Do well in set environments

28
Q

K-strategist examples

A

Bears, mouse, cat

29
Q

Demography

A

Study of human population size, density, distribution, movement and birth and death rates

30
Q

What things increase human population

A

Increases in technology, we’re curious, industrial revolution

31
Q

PGR

A

Human population growth rate

32
Q

What types of countries have a higher PGR?

A

Developing countries

33
Q

ZPG

A

Zero population growth

34
Q

3 parts to a population

A
  1. Pre-reproductive
  2. Reproductive
  3. Post- reproductive
35
Q

Age structure

A

Number of people in each reproductive stage

36
Q

Human carrying capacity

A

Developed countries are using more energy than the undeveloped countries