Growing to the carrying capacity
Logistic growth: dN/dt = rN(1 − N/K) · K = carrying capacity, the largest population the ecosystem can support sustainably · r = growth rate per year
Population and ecosystem
At year 25
Population against time
Population N
Carrying capacity K
Growth this year
Survey the population (is the data valid, reliable, accurate?)
Sampling method
No surveys yet. Survey the same year three times with each method.
On the graph: circles are random-quadrat estimates, squares are greenest-corner estimates. Changing r, K, N0 or the year-25 event clears them.
Run the years forward and watch the shape of the curve.
- The S curve levels off at K
- J curve versus S curve
- K changed and the population followed