Simple life-history omnivory: responses to enrichment and harvesting in systems with intraguild predation.

摘要: AbstractThis article analyzes the nature of top-down and bottom-up effects alternative states in systems characterized by life-history omnivory. The analysis is based on a three-species food web with intraguild predation (IGP). top predator population has juvenile adult stages, which consume basal resource intermediate prey, respectively; prey consumes only resource. per capita reproduction predators depends their consumption rate while maturation rate. Enriching can increase or decrease abundances one both two consumer species; an increased density more likely species than where IGP not stage differences. Alternative that have lack occur frequently, particularly when capable reducing to very low densities. These results differ from t...