Regensburg 2016 – wissenschaftliches Programm

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

BP: Fachverband Biologische Physik

BP 53: Posters - Statistical Physics of Biological Systems

BP 53.5: Poster

Mittwoch, 9. März 2016, 17:00–19:00, Poster C

Influence of heterogeneous habitat quality on meta-foodweb robustness — •Michaela Hamm and Barbara Drossel — Institut für Festkörperphysik, TU Darmstadt, Deutschland

Anthropogenic changes in ecosystems, e.g. habitat fragmentation due to agricultural land usage, have a large effect on the diversity and stability of ecosystems.

In order to better understand these effects, theoretical investigations are needed that take into account the complex foodweb structure as well as the distribution of the species over several habitats and the different quality of these habitats.

We therefore present a computer simulation study of the influence of the degree of habitat heterogeneity on the robustness (number of persisting species) and on the local and regional biodiversity of meta-foodwebs. Each habitat is randomly assigned a high or low quality (abundance of resources), and the total number of habitats as well as the fraction of high- and low-quality habitats are varied.

Among other results we find that heterogeneity promotes diversity, because predators cannot be supported by low-quality habitats, thus providing refuges for prey.