Invertebrate predator-prey body size relationships: an explanation for upper triangular food webs and patterns in food web structure?

摘要: It has been suggested by Cohen and Newman (1985) that many of the patterns in published food webs can be derived from a stochastic model which species are arranged trophic hierarchy (the ‘cascade model’). We suggest that, if predators larger than their prey, generated on basis body size Empirical evidence literature shows there is positive relationship between predator prey for range invertebrates usually prey. Using experimental data an aquatic web we show lead to type used cascade model, suggesting may product size. This conclusion discussed with respect limitations ‘static’ ‘dynamic’ models structure.