DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

BP: Fachverband Biologische Physik

BP 22: Computational Biophysics II

BP 22.9: Vortrag

Mittwoch, 14. März 2018, 17:15–17:30, H 1058

Interplay between Spatial Dynamics and Lifetime Distributions in an Evolutionary Food Web Model — •Tobias Rogge1, Korinna T. Allhoff2, David Jones1, and Barbara Drossel11Institut für Festkörperphysik, Technische Universität Darmstadt, Germany — 2Institute of Evolution and Ecology (EvE), University of Tübingen, Germany

We study the meta-network dynamics emerging in an evolutionary food web model on a system of coupled patches in space. Species are characterized by their body mass and the body-mass interval that specifies their prey. Each patch hosts a food web that contains several trophic layers, and the species composition in the patches changes due to ongoing processes of species addition ("mutation"), migration, and interaction-dependent extinction.

The model is able to sustain a complex food web structure on each patch, while undergoing continued species replacement dynamics. In particular, we evaluate species-lifetime distributions (how long is the time span that a species can survive in the system?) and species-area relationships SAR (how many species can we find in a given area?). All these relationships resemble power laws over appropriately chosen parameter ranges and thus agree qualitatively with empirical findings. We observe strong finite-size effects, and a dependence of the relationships on the trophic layer of the species. More precisely, we find that species with larger body masses on higher trophic position generate steeper SAR.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2018 > Berlin