The effects of stochastic population dynamics on food web structure.
We develop a stochastic, individual-based model for food web simulation which in the large-population limit reduces to the well-studied Webworld model, which has been used to successfully construct model food webs with several realistic features. We demonstrate that an almost exact match is found between the population dynamics in fixed food webs, and that the demographic fluctuations have systematic effects when the new model is used to construct food webs due to the presence of species with small populations.
Powell
Craig R
CR
Theoretical Physics Group, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK. craig.powell@manchester.ac.uk
Boland
Richard P
RP
D000818:Animals; D044822:Biodiversity; D003163:Competitive Behavior; D017753:Ecosystem; D020387:Food Chain; D008954:Models, Biological; D011157:Population Dynamics; D011235:Predatory Behavior; D013045:Species Specificity