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14 Cards in this Set
- Front
- Back
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albedo
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the fraction of solar energy that is reflected back into space
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biotic potntial
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the amount that the population would grow if there were unlimited resources in its environment
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birth rate (crude birth rate)
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the number of live births per 1,000 members of the population in a year
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bottleneck effect
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genetic drift resulting from the reduction of a population ,typically by a natural disaster, such that the surviving poulation is no longer genetically representative of the original population
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carrying capactiy
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the maximum population size that can be supported by the available resources in a region
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clumping dispersion
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the most common dispersion pattern for populations. In this type of dispersion, individuals "flock together"
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death rate (crude death rate)
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is equal to the number of deaths per 1,000 members of the population in a year
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genetic drift
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the random flucturations in the frequency of the appeaance of a gene in a small isolated population, presumably owing to chance, rather than natural selection
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k-selected
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organisms that reproduce late in life, produce fewer offspring, and devote significant time and energy to the nurturing of their offspring
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logistic population growth
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when populations are well below the size dictated by the carrying capacity of the region they live in, they will grow exponentially, but as they approach the carrying capacity, their growth rate will decrease and the size of the population will eventually become stable
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population density
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the number of individuals of a population that inhabit a certain unit of land or water area
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population dispersion
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refers to how individuals of a population are spaced within a region
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r-selected
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organisms that reproduce early in life and often and have a high capactiy for reproductive growth
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total fertility rate
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number of children an average woman will bear during her lifetime; this information is based on an analysis of data from peceding years in the population in question
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