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Unformatted text preview: " N t = RN t K # N t K $ % & ’ ( ) Change in population size " # $ % & ’ = the potential rate of population growth " # $ $ $ % & ’ ’ ’ the number of individuals, N " # $ $ $ % & ’ ’ ’ the unutilized opportunity for population growth " # $ $ $ % & ’ ’ ’ The Logistic Equation N is near zero: K " N t K is close to 1, indicating that most resources are underutilized GROW GROW N is near K : is close to 0, indicating that most resources are utilized SLOW DOWN SLOW DOWN N is above K : is close to 1, indicating that most resources are overutilized DROP DROP " N t = RN t K # N t K $ % & ’ ( ) K " N t K K " N t K Selfthinning curve Imagine that instead of low density allowing high fecundity and survivorship, it caused a DECREASE in these rates. Population Size ( N ) Survivorship Regular density dependence Inverse density dependence or Allee Effect...
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 Spring '11
 Staff
 Ecology, Population Ecology, #, population size, Allee effect

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