Term
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Definition
| number of organisms per unit of living area |
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Term
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Definition
| arrangement of a population in its environment |
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Term
| density-independent factor |
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Definition
| environmental factor such as storms, extreme heat, or cold, that affects populations regardless of their density |
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Term
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Definition
| environmental factor such as predation, disease, and competition that depends on the number of members in a population per unit area |
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Term
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Definition
| how fast a specific population grows |
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Term
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Definition
| movement of individuals away from a population |
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Term
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Definition
| movement of individuals into a population |
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Term
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Definition
| the maximum number of individuals in a species that an environment can support for a long term |
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Term
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Definition
| the study of human populations based on size, density, movement, distribution, and birth and death rates |
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Term
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Definition
| population change from high birth rates and death rates to low birth rates and death rates |
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Term
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Definition
| occurs when the birth rate equals the death rate |
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Term
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Definition
| in any population, the number of individuals in their pre-reproductive, reproductive, and post reproductive years |
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Term
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Definition
| entire species permanently disappear from the biosphere when the last member of the species dies |
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Term
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Definition
| the variety of life in an area that is determined by the number of different species |
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Term
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Definition
| the variety of genes or inheritable characteristics that are present in a population |
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Term
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Definition
| the number of different species and the relative abundance of each species in a biological community |
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Term
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Definition
| the variety of ecosystems that are present in the biosphere |
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Term
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Definition
| gradual process of a species becoming extinct |
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Term
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Definition
| a large scale dying out a large percentage of all living organisms in an area within a short time |
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Term
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Definition
| any material or organism in the biosphere, including water,soil, fuel, and plants and animals |
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Term
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Definition
| overuse of species with economic value |
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Term
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Definition
| habitat loss from separation of an ecosystem of an ecosystem small pieces of land |
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Term
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Definition
| any different environmental condition occurring along an ecosystem's boundaries |
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Term
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Definition
| increasing concentration of toxic substances in organisms as trophic levels increase in food chains or food wens |
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Term
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Definition
| water pollution from nitrogen rich or phosphorous rich substance flowing into waterways, causing algae growth |
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Term
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Definition
| nonnative species deliberately or accidentally introduced into a new habitat |
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Term
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Definition
| any natural resource replaced by natural processes more quickly than it is consumed |
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Term
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Definition
| any natural resource available in limited amounts or replaced extremely slowly by natural resources |
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Term
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Definition
| use of resources at a rate that they can be replaced or recycled |
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Term
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Definition
| found only in a one specific geographic area |
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Term
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Definition
| technique using living organisms to detoxify a polluted area |
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Term
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Definition
| technique of adding essential materials to a degraded ecosystem |
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