Ecology laboratory assignment 5: logistic population growth model
Insert your answers below the questions. If a specific question is not asked, then your answer should be
your R script and/or the R output.
The logistic growth model adds negative density dependence to the exponential growth model.
dN/dt = rN ((K-N)/K) shows the rate of change of population abundance
Nt = K / [1+((K°)/N0)e-rt] is used to predict the number of individuals at time t
Time lag can be added to the logistic growth model by using N(t-?), N at t minus tau (time lag), instead of
N in the express K-N. N in the express rN stays the same.
dN/dt = rN ((K¨t-?))/K)
The logistic model with time lag does not have an integral, to solve for Nt you must solve the differential
equation.
Part A
1. Start by assigning values to N0, r, K, and t.
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