Evolutionary food web model based on body masses gives realistic networks with permanent species turnover

TY - JOUR

T1 - Evolutionary food web model based on body masses gives realistic networks with permanent species turnover

AU - Allhoff, K. T.

AU - Ritterskamp, D.

AU - Rall, B. C.

AU - Drossel, B.

AU - Guill, C.

N1 - 5898, AqE; Data archiving: Property of German Centre for Integrative Biodiversity Research (iDiv)

PY - 2015

Y1 - 2015

N2 - The networks of predator-prey interactions in ecological systems are remarkably complex, but nevertheless surprisingly stable in terms of long term persistence of the system as a whole. In order to understand the mechanism driving the complexity and stability of such food webs, we developed an eco-evolutionary model in which new species emerge as modifications of existing ones and dynamic ecological interactions determine which species are viable. The food-web structure thereby emerges from the dynamical interplay between speciation and trophic interactions. The proposed model is less abstract than earlier evolutionary food web models in the sense that all three evolving traits have a clear biological meaning, namely the average body mass of the individuals, the preferred prey body mass, and the width of their potential prey body mass spectrum. We observed networks with a wide range of sizes and structures and high similarity to natural food webs. The model networks exhibit a continuous species turnover, but massive extinction waves that affect more than 50% of the network are not observed.

AB - The networks of predator-prey interactions in ecological systems are remarkably complex, but nevertheless surprisingly stable in terms of long term persistence of the system as a whole. In order to understand the mechanism driving the complexity and stability of such food webs, we developed an eco-evolutionary model in which new species emerge as modifications of existing ones and dynamic ecological interactions determine which species are viable. The food-web structure thereby emerges from the dynamical interplay between speciation and trophic interactions. The proposed model is less abstract than earlier evolutionary food web models in the sense that all three evolving traits have a clear biological meaning, namely the average body mass of the individuals, the preferred prey body mass, and the width of their potential prey body mass spectrum. We observed networks with a wide range of sizes and structures and high similarity to natural food webs. The model networks exhibit a continuous species turnover, but massive extinction waves that affect more than 50% of the network are not observed.

KW - international

U2 - 10.1038/srep10955

DO - 10.1038/srep10955

M3 - Article

SN - 2045-2322

VL - 5

JO - Scientific Reports

JF - Scientific Reports

M1 - 10955

ER -