Regensburg 2019 – scientific programme

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BP: Fachverband Biologische Physik

BP 6: Poster I

BP 6.75: Poster

Monday, April 1, 2019, 17:30–19:30, Poster B2

Investigation of Spatial Dynamics of an Evolutionary Food Web Model on Random Geometric Graphs — •Johannes Reinhard, Tobias Rogge, and Barbara Drossel — TU Darmstadt, Germany

We examine an evolutionary food web model without population dynamics. Each species is characterized by a few traits based on its body mass, and the network context (predation, competition) determines species survival. We study a meta-network of patches coupled by migration on a random geometric graph (RGG). To this purpose we use an algorithm, based on the transition rates of the network, to divide the RGG into several modules allowing us to analyse the dynamics in and between modules. In addition to the investigation of species dispersal in dependence on the lifetime of the species our main focus is on the study of species area relationships (SARs, i.e., increase of species richness with increase of sampling area). There are two ways to determine the SAR: by looking at nested areas, as previously done, or by looking at nonoverlapping areas, such as the modules. This allows us to understand the results of a large-scale meta study that found a different scaling behaviour depending on which of the two methods was used.