Term
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Definition
A group of organisms, all of the same species that live in a specific area
- every organism you can think of is a member of a population.
- A healthy population will grow and die at a relatively steady rate unless it runs out of water, food, and space, or is attacked in some way by desease or predators. |
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Term
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Definition
| The number of organisms of one species that an environment can support indefinitely |
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Term
| Rapid Life-History pattern |
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Definition
Common among organisms from changeable or unpredictable environments.
-usually have small body size, mature rapidly, reproduce early, and have short life span
-rapid reproduction when conditions are favorable |
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Term
| Slow life-history pattern |
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Definition
Common in large species that live in more stable environments
-elephants, bears, whales, humans, and plants (trees)
-reproduce and mature slowly and have long lives
-maintain population size at or near carrying capacity |
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Term
| Other factors that influence population size and growth |
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Definition
-Density-dependent factors
-Density independent factors
-Predation (predators)
-Competition within a population
-Effects of crowding and stress |
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Term
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Definition
| The study of human population size, density and distribution, movement, and its birth and death rates |
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