食物連鎖とエネルギー栄養段階の構造

概要

論文の詳細を見る
Dynamical properties of energy trophic levels were studied, using the theoretical model that was reconstituted from a food web by unfolding its flow netwerk structure. On the basic assumptions concerning the efficiency of energy metabolism, the criteria which determine the numbers of levels(or lengths of food chain)attainable in dynamically stable stationary states were obtained, in terms of parametersγ(the measure of effective energy production at consumer levels)and ε(the gross production rate of autotrophic level). The biomass(standing energy stock)of each level in an equilibrium state was also evaluated ; and it was shown that when the highest possible level was filled, the system always exhibits a pyramid type structure of energy biomass. Furthermore, if the top predators which belong to this highest level are removed, it leads to a new equilibrium state with an apparently deformed structure.
日本生態学会の論文
1993-04-10