# The Azimuth Project Allee effect (Rev #3, changes)

Showing changes from revision #2 to #3: Added | Removed | Changed

# Contents

## Idea

the Wikipedia article:

The Allee effect is a phenomenon in biology characterized by a positive correlation between population density and the per capita population growth rate in very small populations.population growth rate in very small populations.

## Marthematical formilation

Here it is seen in the form of an extra term in the logistics equation: ${d x \over d t} = {r\over K} (K-x) x (a-x)$ where $a$ is the Allee extinction threshold.

## References

Allee effect, Wikipedia

category: ecology