[Population size and areas of stratification in the variational model of ecosystem].
The formulations of the variational task for finding the relative population size of species in community at a stationary stage of growth and of the theorem of stratification are given. Algorithms of finding the relative size of populations for communities consisting of two and three species consuming two or three resources were obtained. The borders of areas of stratification were described in which one, two, or three resources are limiting. For two species and two resources, the formulae of the dependence of relative size on the ratio of resources were derived, and the shape of this dependence for real requirements of species was demonstrated.
Biological Department, Lomonosov Moscow State University, Vorob'evy Gory, Moscow, 119899 Russia.
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D000465:Algorithms; D017753:Ecosystem; D008954:Models, Biological; D011156:Population Density