Insect Infestation Mortality

This behavior causes mortality in trees that are infested with insects, as determined by the Insect Infestation behavior.

Trees killed by this behavior will have a mortality reason code of "insect".

Parameters for this behavior

Parameter nameDescription
Insect Mortality - Intercept The mortality rate, between 0 and 1, at the first timestep of infestation.
Insect Mortality - Max Mortality Rate (0-1) Maximum mortality rate, between 0 and 1.
Insect Mortality - X0 The time at which 0.5 of the maximum mortality rate occurs.
Insect Mortality - Xb Parameter controlling the steepness of the rise of the mortality rate.

How it works

The mortality rate of trees as a function of time infested is as follows:

Insect infestation equation

where:

Once the mortality rate for an infested individual has been determined, a random number determines whether it will live or die.

The Insect Infestation behavior decides which trees become infested, and tracks the amount of time each individual has been infested.

How to apply it

Apply this behavior to saplings and/or adults of any species. Any tree to which this behavior is applied must also have the Insect Infestation behavior applied.