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20 Cards in this Set
- Front
- Back
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extincition
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the disappearance of a species when the last of its members dies
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biodiversity
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number of different species living in a specific area
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genetic diversity
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variety of inheritable charactersitics or genes in an interbreeding population`
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species diversity
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in a biological community, the number and abundance of different species
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ecosystem diversity
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variety of ecosystems in the biosphere
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background exticntion
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gradual process of aspecies becoming extinct
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mass extinction
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a large-scaled dying out ofa large percentage of living organisms in an area within a short time
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natural resource
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any material or organism in the biosphere, including water, soil, fuel, and plants and animals
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overexploitation
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overuse of species with economic value-a factor in species extinction
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habitat fragmentation
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habitat loss from separation of an ecosystem into small pieces of land
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edge effect
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any different environmental condition occuring along an ecosystem's boundaries
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biological magnification
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increasing concentration of toxic substances, such as DDT, in organisms as trophic levels increase in food chains or food webs
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eutrophication
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water pollition from nitrogen-rich and phosphorus-rich substances flowing into waterways, causing algal overgrowth
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intoduced species
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nonnative species deliberatly oraccidentaly introducedd into a new habitat
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renewable sources
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any resourcereplaced by naturaal processes more quickly than it is consumed
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nonrewnewable resource
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any natural resource available in limited amounts or replaced extremly slowly by natural processes
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substainable use
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use of resources at a rate that they can be replaced or recycled
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endemic
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found only only in one specifif geographic area
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bioremediatation
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techniques using living organisms to detoxify a polluted area
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biological augmentation
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technique of adding essential materials to adegraded ecosystem
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