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| a group of individuals of the same species in a specified space at a specified time |
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| why do populations change? (3) |
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natality=birth mortality=death immigration and emmigration |
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| how do we deterimine population size in non-motile organisms? |
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a frame to see how many individuals in a general area. its an unbiased fashion. calculate average individuals per quadrat pop= (/# in quad)*(area/quad) |
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| how do we determine pop size in motile organisms? |
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Definition
lincoln-peterson index (mark/recapture technique) #marked/total marked=(capture/total pop) |
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| big animals have a _____ population than small animals |
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| calculation of population doubling time |
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| a census man in London that noticed the cities pop doubles every 64 years |
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| it is bad when pop exceeds ______ |
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| Great Tit population studies show |
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| decreased reproductive output (fecundity) with increased density |
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tradeoff between growth and reproduction |
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| empirical observations on Flour Weevils: |
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-initial population growth seemed exponential -after ~10 weeks rate of increase decreases -from week 20 through 100 pop oscillated |
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| carrying capacity, the number of individuals that can be supported by environmental resources and energy |
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| what are the features of the logistic growth curve? |
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"S" bend. eventually hits the line (K) where it stabalizes |
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