l13 logistic growth - ecology & evolutionary...
Post on 27-Jul-2020
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Intraspecific CompetitionGoals (part 1):• Understand steady-states• Understand density dependent population
regulation• Be familiar with the logistic equation• Assumptions of logistic model• Be familiar with examples of logistic growth
Intraspecific CompetitionGoals (part 2):• How are time lags incorporated into the
logistic model?• Qualitatively describe how time lags affect
population growth with the logistic model• Discrete vs. continuous form of the logistic
model – built in time lags• How do populations with different r respond
to variations in carrying capacity?
Logistic Equation – Sigmoid Growth
Logistic
ExponentialExponential
Logistic
These figures compare dN/dt and [(1/N)(dN/dt)] for the logistic and exponential models. They might help you to conceptually understand the difference between the two with respect to population growth and the intrinsic rate of growth as population size changes.
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