Regensburg 2007 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
BP: Fachverband Biologische Physik
BP 16: Poster Session I
BP 16.16: Poster
Dienstag, 27. März 2007, 17:00–19:30, Poster D
Sexual reproduction prevails in a world of structured resources in short supply — •Irene Ament1, Barbara Drossel1, and Stefan Scheu2 — 1Institut für Festkörperphysik, Technische Universität Darmstadt, Deutschland — 2Institut für Zoologie, Technische Universität Darmstadt, Deutschland
The maintenance of sexuality against the two-fold cost of sex is one of the most stunning problems in evolutionary biology. We present a model that is based on the availability of resources, which is the strongest factor determining the growth of populations. Key features of the model are that there is a broad spectrum of resources, that sexual reproduction sets in when resources become scarce, that only a few genotypes can coexist locally, and that resources regrow slowly. We show that under a wide range of conditions the sexual species outcompete the asexual ones. The asexual species win when survival conditions are harsh and death rates are high or consumer genotypes are so manifold that all resources are exploited to the same extent. These results are robust against modifications of the model, including various types of spatial structure.