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20 Cards in this Set
- Front
- Back
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exponential growth
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growth of a system in which the amount being added to the system is proportional to the amount already present: the bigger the system is, the greater the increase
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limiting factors
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environmental factor that limits the growth, abundance, or distribution of a population
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density dependent
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limiting factor that intensify as the population increases in size
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density independent
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limiting factors that affect the same proportion of individuals in a population regardless of population density
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carrying capacity
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number of organisms of a population that a particular environment can support over an indefinite period of time
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examples of limiting factors
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availability of food, space, water, nutrients, sunlight, prey, ect.
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density dependent examples
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disease, competition, parasites, overcrowding, ect.
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density independent
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temperature, floods, drought, habitat disruption, climate change
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examples of rapid reproduction (r)
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unpredictable environment, small body size, mature rapidly, short life, little energy invested in young
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examples of slow reproduction (K)
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stable environments, large in size, mature slowly, long life, high energy invested in young
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increase in predation
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decrease in prey population
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overpopulation of population of predator results in
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depletion of prey
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predation keeps ecosystems in
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balance
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demography
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the study of the size, growth, and age and geographical distribution of human populations and birth, death, marriage, and migrations
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causes for population growth
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growth rate
age structure geographic distribution |
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industrialized countries have declining
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death, birth, and fertility rates
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growth rate
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birth rate-death rate
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age structure
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proportions of population in pre-reproductive, reproductive, and post-reproductive years
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immigration
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movement of individuals into a population
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emigration
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movement from a population
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