Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:In these and other studies (e.g. Andersen and Beyer 2006; Maury et al. 2007; Law et al. 2009; Blanchard et al. 2009; Hartvig et al. 2011), the McKendrick–von Foerster equation is used to model the predation and the consequent predator growth that moves biomass through the ecosystem (McKendrick…
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