Open AccessGRAPH MODEL OF INTERACTION OF ANTHROPOGENIC AND BIOTIC FACTORS FOR THE PRODUCTIVITY OF THE CASPIAN SEA
Author(s) -
A. Yu. Perevaryukha
Publication year - 2015
Publication title -
vestnik samarskogo universiteta. estestvennonaučnaâ seriâ
Language(s) - English
Resource type - Journals
eISSN - 2712-8954
pISSN - 2541-7525
DOI - 10.18287/2541-7525-2015-21-10-181-198
Subject(s) - graph , population , computer science , structuring , ecology , theoretical computer science , economics , biology , demography , finance , sociology
In this paper the construction of the graph model, structuring multivariate analytical reports on the interaction of natural and anthropogenic factors in the ecosystem, which were presented in the form of a set of related concepts is presented. In the signed directed graph in the computing environment a propa- gation of pulses from the vertices within the context the study the situation of degradation of sturgeon stocks of the Caspian Sea was analyzed. These species are included in the Red Book since 2010 despite eorts in organizing an ar- ticial breeding of sh. Method of cognitive structurization allowed to reveal hidden feedback loop on the basis of the graph, weakens the reproduction of sh populations and become the cause of overestimation acceptable exploitation of bioresources. An approach of functional iteration for describing the dynamics of population processes with nonlinear function of the eciency of reproduc- tion was discussed. It is shown that the discrete iteration have contradictory qualitative behavior of the trajectory in terms of biological interpretation of bi- furcations. It is proposed to use the predicative redened computing structure based on the chart of behaviors for the description chain of regime changes of the simulated process. For this type of structural changes is promising to allocate substantial uctuations of growth rate in the early ontogenesis of sh.