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15 Cards in this Set
- Front
- Back
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What refers to the number of individuals per unit area?
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Population Density
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What factors affect population size?
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Birthrate, deathrate, and the rate at wich an individual, enters or leaves the population
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Under what conditions will a population grow exponentially?
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Under ideal conditions with unlimited resources.
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True/False, does bacteria have exponential growth?
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True.
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What is the first phase in Logistic growth?
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Exponential Growth.
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What is the maximum number of individuals of a particular species that a particular enviroment can support?
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Carrying capacity.
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The factor that controls the growth of a population?
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Limiting Factor.
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What do limiting factors determine?
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The carrying capacity of an enviroment for a species.
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What operates strongly only when population density reaches a certain level?
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Density-dependent limiting factors.
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What do Density-dependent factors include?
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Predation, herbivory, parasitism, disease, and stressfrom overcrowding.
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What affects all populations in similar ways, regardless of population size and density?
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Density-independent limiting factors
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What are some density-independent limiting factors?
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Hurricanes, droughts, and floods, also wildfires.
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As civilization advanced, life became easier, and the human population began to what?
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Grow more rapidly.
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A large part of ongoing human population growth is happining in only ten countries, with what two countries in the lead.
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India and China.
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Current projections suggest that by 2050, the world population will reach what?
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9 Billion.
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