|Glotzmann, T; Lange, H; Hauhs, M: Population dynamics under spatially and temporally heterogeneous resource limitations in multi-agent networks. in Banzhaf, W., Christaller, T., Dittrich, P., Kim, J.T. and Ziegler, J.: Advances in Artificial Life. Proceedings of the 7th European Conference on Artificial Life, Springer Verlag, 2801, 328-335 (2003)|
An individual-based agent model is presented which resembles aspects of natural evolution in ecosystems under selective pressure due to limited resources. The environmental conditions are determined by spatial and temporal variability of resource abundances. The agents have to choose between three different types of resources; the one consumed most during lifetime solely counts for the fitness of the individual agent. Simulation runs show that populations specialized in different resource types are mutually influencing each other under temporal variation of a single resource type. Mobility of agents in a locally heterogenous world enables recolonization after a population has starved to death. Wavelet analysis of the population time series reveals that some observed population dynamics show phenomena such as localized periodicities which cannot be explained by linear dependencies on the resource input dynamics.