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29 Cards in this Set
- Front
- Back
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Population density |
Which is the number of organisms per unit area |
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Emigration |
Is the term ecologists use to describe the number of individuals moving away from a population |
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Demography |
The study of human population size density, distribution, movement, and birth and death rates |
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Demographic transition |
This change in a population from high birth and death rates to low birth and deaths rates |
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Zero population growth |
Occurs when births plus immigration equals death plus emigration |
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Which is an example of population density? |
Two jaguars per thousand hectares |
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Demography is the study of_____ |
Human population |
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Humans will reach zero population growth when_____ |
Birthrate equals death rate |
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Hurricanes frequently reduce palm tree population |
Density independent factor |
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An ice storm kill many waterfowl |
Density independent factor |
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As the number of cheetahs drops the number of gazelles increases |
Density dependent factor |
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An island has only enough nesting sites for six pairs of pelicans |
Density dependent factor |
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How many wolves were there on Isle Royale in 1980? |
50 wolves |
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What year was the moose population at its lowest |
1997 |
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The type of growth represented by the graph |
Logistic population growth |
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The carrying capacity of the population |
10,000 |
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Which is an example of uniform dispersal? |
Territorial jaguar pairs |
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Which density-independent factor for a flock of Canada geese on a large lake? |
Unusually cold winter |
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Which is an adverse effect of negative-growth population trend? |
Too few jobs to support a large young population |
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Which might increase the human carrying capacity due the twenty-first century? |
New technological advances |
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The use of total global resources by humans is measured in_____ |
Hectares of land used per country |
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Considered developing country |
Sudan |
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Uses the greatest amount of resources per person |
United States |
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Has a negative-growth population trend |
Germany |
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Which is not used to describe a population of grizzly bears in Canada? |
Demographic history |
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Which organism follows and r-strategy for reproduction? |
Mayfly |
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Which describes the current human population growth? |
Increasing growth and decreasing rate of growth |
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Which could decrease the human carrying capacity? |
Energy crisis |
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The event that precipitated exponential human population growth is called the_____ |
Industrial revolution |
