I know what a J-curve is but unsure about S-curve.
In: Mathematics
An S-shaped curve [1] has the same rough shape as [this curve](https://en.wikipedia.org/wiki/File:Logistic-curve.svg).
In ecology, an S curve is usually used as a mathematical model of how population grows over time in a favorable but resource limited environment.
A small population placed into an environment where it can thrive will grow exponentially over time, growing faster and faster, but once the population gets large enough, it will start running into resource limits like space or food/prey, which means the growth will slow down again.
[1] “Sigmoid curve” is a fancy term for S-shaped curve
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