POPULATION DYNAMICS ON COMPLEX FOOD WEBS

Gian Marco Palamara (), Vinko Zlatić (), Antonio Scala () and Guido Caldarelli ()
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Gian Marco Palamara: Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190 CH-8057, Zurich, Switzerland
Vinko Zlatić: Theoretical Physics Division, Rudjer Bošković Institute, P. O. Box 180, HR-10002 Zagreb, Croatia;
Antonio Scala: ISC-CNR, Department of Physics, University of Rome "Sapienza" P.le Moro 5, 00185 Rome, Italy;
Guido Caldarelli: ISC-CNR, Department of Physics, University of Rome "Sapienza" P.le Moro 5, 00185 Rome, Italy;

Advances in Complex Systems (ACS), 2011, vol. 14, issue 04, 635-647

Abstract: In this work we analyze the topological and dynamical properties of a simple model of complex food webs, namely the niche model. In order to underline competition among species, we introduce "prey" and "predators" weighted overlap graphs derived from the niche model and compare synthetic food webs with real data. Doing so, we find new tests for the goodness of synthetic food web models and indicate a possible direction of improvement for existing ones. We then exploit the weighted overlap graphs to define a competition kernel for Lotka–Volterra population dynamics and find that for such a model the stability of food webs decreases with its ecological complexity.

Keywords: Complex networks; food webs; population dynamics (search for similar items in EconPapers)
Date: 2011
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Citations: View citations in EconPapers (1)

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DOI: 10.1142/S0219525911003116

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