The Apply mediation form (Time dynamic (Ecosim) > Input > Mediation > Apply Mediation) is used to apply the trophic mediation functions you defined using the Mediation form.
Before using the Apply mediation form, you must first define at least one trophic mediation function following the instructions for using the Mediation form. It is recommended you first read the introductory material on Linking mediation and time forcing functions to trophic interaction rates to understand how trophic mediation functions are applied in Ecosim.
Selecting Apply mediation opens a form that consists of a grid representing predator (j) / prey (i) interactions (Figure 8.13). Predators are represented in columns with prey in rows. Predator/prey interactions, as defined in the Diet composition are indicated by white cells.
Next, select the parameter to which the mediation multiplier is to be applied using the radio buttons at the bottom of the dialogue box. There are four possible options:
The selected modifier will be shown in the Applied shape functions window (Figure 8.14).
Note that you can apply up to five seasonal, forcing and/or mediation functions to each predator-prey interaction.
You can clear all applied seasonal, forcing and/or mediation functions from the predator-prey grid by selecting Clear all from the top of the Apply mediation form.
To apply a mediation function to the interactions between a particular predator and all of its prey species, click on the number of the predator at the top of the form. When the Apply forcing and mediation functions dialogue box opens you will see a message at the top of the box reflecting that all the prey are affected.
Figure 8.13 The Apply mediation form.'
Figure 8.14 The Apply forcing and mediation functions dialogue box. Select only Mediation shapes.