All Flashcards

(41 cards)

1
Q

Demography

A

study of the vital statistics of a population and how they change over time

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2
Q

immigration

A

coming in

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3
Q

emigration

A

leaving

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4
Q

crude birth and death rates are based on total number of births or deaths per

A

1,000 people in a population

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5
Q

Direct Count or Census

A

count all the individuals in a population (humans)

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6
Q

Quadrat

A

individuals are counted within a sample area (plants)

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7
Q

Capture-Recapture

A

count and mark number of individuals in area and return to habitat. then go back and count again

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8
Q

What kind of species live clumped?

A

Animals

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9
Q

What kind of species live Uniform?

A

plants, for nutrients and non competition

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10
Q

What kind of species live Random?

A

Dandelions or weeds

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11
Q

Not mature enough to reproduce

A

pre reproductive age(0-14)

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12
Q

those capable to reproduction

A

Reproductive age(15-44)

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13
Q

those too old to reproduce

A

post reproductive age (45+)

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14
Q

rate at which population would grow if it had unlimited resources

A

intrinsic rate of increase (r)

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15
Q

maximum population of a given species that a particular habitat can sustain indefinitely without degrading the habitat

A

Carry Capacity (K)

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16
Q

Number of individuals in a population found in a particular area or volume

A

population density

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17
Q

Density Independent Factors

A
seasons
climate
temperature
hurricanes
tornadoes
drought
floods
18
Q

Density Dependent Factors

A
Competition 
predation
disease 
behavior
reproductive capacity
19
Q

Regulating/ Limiting Factors is AKA

A

Environmental Resistence

20
Q

Maximum possible growth rate

A

biotic potential

21
Q

J Curve

A

Steep and growing line

22
Q

S curve

A

line at or around carrying capacity that is relatively constant and not growing

23
Q

fluctuates slightly above and below carrying capacity

24
Q

populations explode and then crash to a more stable level

25
populations fluctuate and regular cyclic or boom and bust cycles (predator and prey)
cyclic
26
erratic changes possibly due to chaos or drastic change (weather)
irregular
27
Species that are opportunists tend to be short lived and small
R
28
Species that are competitors and long lived only a few offspring
K
29
Rhinos, Bears and more have what type of survivorship curve
Late Loss
30
Birds have what kind of survivorship curve
Constant loss
31
Fish have what kind of survivorship curve
early loss
32
Average number of babies per woman WORLDWIDE
2.4
33
replacement level fertility
2.0
34
of babies per woman
fertility rates
35
of babies per 1,000 in population
birth rates
36
preindustrial
little population growth due to high infant mortality
37
transitional
industrialization begins, death rates drop birth rates remain high
38
industrial
birth rates drop and approaches death rates
39
postindustrial
birth rates drop to or below death rates population stabilizes or shrinks
40
Worlds most populated country
China
41
Country growing most rapidly
India