Chap 5? Flashcards
(22 cards)
The variety of life in an area that is determined by the number of different species in that area
Biodiversity
Entire species permanently disappear from the biosphere when the last member of the species dies
Extinction
The variety of genes or inheritable characteristics hat are present in a population comprises
Genetic diversity
Number of different species and the relative abundance of each species in a biological community
Species diversity
The variety of ecosystems that are present in the biosphere
Ecosystem diversity
The gradual processor species becoming extinct
Background extinct
An event in which a large percentage of all living species become extinct in a relatively short period of time
Mass extinction
Are all material and organisms found in he biosphere
Natural resource
Excessive use for economic value
Over exploitation
The separation of an ecosystem into small pieces of land
Habitat fragment
Different environmental conditions that occur amoung the boundaries of an ecosystem
Edge effect
Increasing concentration of toxic substances in organisms as trophic levels increase in a food chain or food web
Biological magnification
Destroys underwater habits for fish and other species
Eutrophication
Nonnative species that are either intentionally or unintentionally transported to a new habit
Introduced species
Those resources that are replaced by natural processes faster than they are consumed
Renewable resource
Resources that are found on earth in limited amounts or that are replaced by natural processes over extremely long periods of time
Nonrenewable resource
Using resources at a rate which they can web replaced or recycled while preserving the long term environmental health of the biosphere
Sustainable use
Species that are only found in that specific geographic area
Endemic
The use of living organisms to detoxify a polluted area
Bioremediation
Adding natural predators to a degraded ecosystem
Biological augmentation
Species becoming extinct or in danger of becoming extinct
Endangered species
The number of species is dwindling
Threatened species