diversity and interdependence of life unit 2 test review
TRANSCRIPT
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Diversity and Interdependence of Life Unit 2
Test Review
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Population Arrangement
• Population range: where members of a population are found (Grey Wolf Habitat)
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Population Arrangement
• Population distribution: how individual members of populations are spread out within their range
O = INDIVIDUAL
WOLF PACKS
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Population Arrangement
• Population density: the number of individual in a certain amount of space; this is a number
• Urban areas (cities) have a high population density
Population Density = the number of people/area
EX. New York City 58,821 people/square mile West Milton has 1,429 people/square mile
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Population Growth
• These things affect a population’s growth rate:1. Birth Rate: how many individuals are born.
When the birth rate is higher than the death rate, the population increases.
2. Death Rate: how many individuals die. When the death rate is higher than the birth rate, the population decreases.
3. Immigration: how many individuals move into an area
4. Emigration: how many individuals exit an area
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Population Growth
• If the population has unlimited resources and unlimited space, it will grow very rapidly, This rapid growth is called exponential growth.
# of people = 2n-1
n= the previous generation number
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Population Growth
• Most populations have limiting factors; therefore, they show logistic growth.
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Population Growth
PHASE 1:Exponential Growth
PHASE 2: Growth Rate Slows
PHASE 3: Growth Rate stops.Birth Rate = Death Rate
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Population Growth
• These limiting factors can be density-dependent or density-independent.1. Density-Dependent Factors are factors that
control the growth of large populations.Examples of density-dependent factors
include food supply, water supply, disease, predation, competition, living space.
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Population Growth
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Population Growth
• These limiting factors can be density-dependent or density-independent.
2. Density-Independent Factors limit population growth regardless of the size of the population.
Example include catastrophic events such as earthquakes and volcanoes, severe
storms and flooding, extreme cold spells, etc.
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Demography
• The study of the structure of human populations
• Age structures (population pyramids) are often used.
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Population Geography
1
23
45
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Population Geography
• Countries with high industrialization typically have high carbon dioxide emissions, which contribute to greenhouse gases and ultimately, global warming.
• Countries with high industrialization are also typically the wealthier countries.
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Ecological Footprint
Ecological footprint: how much space and resources it takes to support a person’s lifestyle.
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Ecological Hot Spot