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10 Cards in this Set
- Front
- Back
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carrying capacity
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The number of organisms of one species that an environment can support indefinitely
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density-dependent factor
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include disease, competition, predators, parasites, and food. These factors have an increasing effect as the population increases.
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exponential growth
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means that as a population gets larger, it also grows at a faster rate. Exponential growth results in unchecked growth.
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life-history pattern
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determines population growth—an organism’s reproductive pattern,
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age structure
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refers to the proportions of the population that are in different age levels.
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birth rate
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the number of live births per 1000 population in a given year.
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death rate
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the number of deaths per 1000 population in a given year.
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demography
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study of human population size, density and distribution, movement, and its birth and death rates.
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doubling time
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the time needed for a population to double in size.
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density-independent factor
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can affect populations, regardless of their density. Most density-independent factors are abiotic factors, such as volcanic eruptions, temperature, storms, floods, drought, chemical pesticides, and major habitat disruption
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