Term
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Definition
| the number of individuals per unit area |
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Term
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Definition
| the movement of individuals into an area |
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Term
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Definition
| the movement of individuals out of an area |
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Term
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Definition
| when individuals of a population reproduce at a constant rate; under ideal conditions; J-shaped curve |
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Term
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Definition
| occurs when population stops/slows down its reproduction rate; a limited amount of resources; S-shaped curve |
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Term
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Definition
| the largest number of individuals a given environment can support |
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Term
| Density-Dependent Factors |
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Definition
| factor that depends on population size and only become limiting when a population density reaches a certain level |
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Term
| Density- Independent Factors |
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Definition
| factors that affect all populations in a similar way, regardless of size |
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Term
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Definition
| the study of human populations; attempts to explain how they will change over time |
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Term
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Definition
| graph the number of people in different age groups in a population |
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Term
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Definition
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Term
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Definition
| can regenerate if they are alive or can be replenished by biogeochemical cycles if they are nonliving |
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Term
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Definition
| one that cannot be replenished by natural resources |
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Term
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Definition
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Term
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Definition
| harmful material that can enter the biosphere through land, air, or water |
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Term
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Definition
| total variety of organisms in the biosphere |
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Term
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Definition
| a species disappears from all or part of its natural range |
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Term
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Definition
| process in which concentrations of harmful substances increase in organisms at higher trophic levels in a food chain |
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Term
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Definition
| organisms introduced to a new habitat and reproduce quickly |
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Term
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Definition
| increase in average temperature in the biosphere |
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