SORTIE-NDSoftware for spatially-explicit simulation of forest dynamics
Self-thinning is a behavior that uses a pseudo-density dependent function designed to increase the death rate in dense uniform-age stands. You specify a maximum DBH at which to apply it - above this DBH a tree will not die.
Trees killed by this behavior will have a mortality reason code of "natural".
Parameters for this behavior
How it works
Self-thinning uses a simple linear function of probability of mortality as a function of DBH, assuming the tree is below the maximum DBH at which to apply self-thinning. After evaluating this function for a tree, it uses a random number to determine whether the tree dies.
How to apply it
This behavior can be applied to seedlings, saplings, and adults of any species.