Exponential Model

# Exponential Model - again. r= b d or r = birth rate death...

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1/31/11 Exponential Model B=bN and D=dN Example from before. The figure out how many births there are for a population lets take b=0.034. Now how many births are there in a population of 500 individuals. B=17 per year Now our equation looks like this ∆Ν/∆τ = bN - dN

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1/31/11 Exponential Model Population ecologists are not concerned with how many births and how many deaths there are: just how these factors affect overall population. SO the equation gets changed
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Unformatted text preview: again. r= b d or r = birth rate death rate Example population 1000 individuals, 50 births, 80 deaths. b=0.05 d=0.08 r= -0.03 1/31/11 Exponential Model Finally most ecologists use calculus notation to illustrate instantaneous changes: dN/dt = rN Remember we are talking about a population that is living under ideal conditions (no limited resources) Intrinsic rate of increase = a populations maximum rate of growth...
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## This note was uploaded on 01/30/2011 for the course BIOL 001 taught by Professor Nathan during the Spring '10 term at George Mason.

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Exponential Model - again. r= b d or r = birth rate death...

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