Colored environmental variation and dispersal between subpopulations were incorporated into a diamond shaped food web based on a model by Vasseur and Fox 2007. Parameter values were estimated with help from empirical studies and have previously been used by Vasseur & Fox 2007 and McCann et al. 1998.
 

* logistic growth of resource

* asynchronous consumers

* environmental variation on consumers

* dispersal of mass-action mixing

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Figure: P is the density of the top predator, C1 the first consumer, C2 the second consumer and R the resource.
Preference coefficient, Ωi,j, represent the strength of the trophic interaction between species i and j.

• environmental fluctuation strength (standard deviation)
• environmental response (cross-correlation of the response of consumers and their different subpopulations)
• color of environmental variation
• dispersal or no dispersal

• mean
• variance
• stability of patch density, species density and food web total density
• cross-correlation of consumer species
• color of species time series
• extinction risk