Food Webs: explanations. Explanations for food webs draw heavily on two kinds of models: dynamic models base on extensions of the Lotka-Volterra predator-prey models, and static models that make no specific reference between population dynamics and food web patterns. Food Webs: explanations. Dynamic
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where biis the per capita population growth rate of species i, ai,jis the per capita effect of species j on species i, including intraspecific effects when i=j, and Xiis the abundance of species i, in a system of n species
dXi / dt = Xi (bi + ∑ ai,jXj) = Fi