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19 Cards in this Set
- Front
- Back
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age structure |
number of males and females of each age group in a population |
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carrying capacity |
maximum number of individuals of a particular species that an environment can support |
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emigration |
when individuals move out of a population |
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exponential growth |
growth where the larger a population gets,the faster it grows |
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immigration |
when individuals move into a population |
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logistic growth |
growth that takes place when a population's growth slows and then stops following a period of exponential growth;forms an s-shaped curve on a graph |
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density-dependent limiting factor |
a limiting factor that affects all populations in similar ways regardless of population size and density |
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limiting factor |
something that controls the growth of a population |
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demographic transition |
a dramatic change from high birthrates and death rates |
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monoculture |
the practice of planting large fields with a single variety of crop year after year |
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nonrenewable resource |
a resource that cannot be remade by natural processes |
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renewable resource |
resource that can be remade quickly and that is replaceable |
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biological magnification |
process by which the strength of a pollutant increases as if moves up the food chain |
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deforestation |
the loss of forests |
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desertification |
process in which farmland is turned into desert |
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biodiversity |
the total variation in all living things |
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habitat fragmentation |
the splitting of an ecosystem into pieces as a result of development |
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ecological footprint |
all of the land and water needed to make and to clean up the resources an individual or population uses |
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ozone layer |
layer of the atmosphere in which ozone gas is concentrated |
