Suppression Duration Mortality

This behavior evaluates mortality as a function of tree age. This is particularly useful for simulating suppression in seedlings.

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

Parameters for this behavior

How it works

A tree's probability of mortality is:

where:

• p is the probability of mortality
• Max is the Suppression Duration Mortality - Max Mortality Rate (0-1) parameter
• X₀ is the Suppression Duration Mortality - X0 parameter
• X_b is the Suppression Duration Mortality - Xb parameter
• Age is the tree's age, in years

The value for X₀ is the age at which half of the maximum mortality rate is reached. Tree age is tracked using the Tree Age Calculator behavior. Initial conditions trees get a mortality of zero because their age is unreliable.

How to apply it

This behavior can be applied to trees of any species. Trees must also have the Tree Age Calculator behavior applied.