Berlin 2018 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 15: Postersession III

BP 15.60: Poster

Dienstag, 13. März 2018, 14:00–16:00, Poster B

Investigation of an evolutionary foodweb model on a large lattice of habitats — •Johannes Reinhard, Tobias Rogge, and Babara 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 (predators, prey, competitors) determines species survival. This approach uses far less computing time than models with population dynamics and can therefore applied to several hundred placed on a square grid. In addition to speciation, migration, and context-dependent extinction, the model includes also a spontaneous extinction rate. When this rate is set to zero, the system reaches a frozen state where no new species can enter, and the formation of this frozen state depends crucially on migration. Furthermore we investigate which properties allow a species to spread over many patches: its body mass has to be close to the feasible body mass interval of the respective trophic level.