Ecological Systems and Devices Annotation << Back MODELING OF CHANGES IN THE TROPHIC STRUCTURE OF THE ECOLOGICAL SYSTEM OF THE SHELF DURING THE CHANGE OF DOMINANT SPECIES N.V. Solovyeva In the implementation of large oil and gas projects affecting the aquatic ecosystem, it is important to predict the trends of a possible restructuring of its structure. It’s the appearance of a new invasive organisms, «invaders» that can lead to loss of biodiversity, depletion of food resources of the sea and impaired sustainability of ecosystems. In the present work on the basis of the mathematical model was simulated occupancy in the ecosystem of the North Caspian predatory ctenophore Mnemiopsis leidyi. As shown by calculations, the violation of stability of functioning of ecosystems does not occur. It goes to the next stable mode when the presence of invasive species. Keywords: Mathematical modelling; ecological system; the restructuring of the trophic structure; shelf. Contacts: E-mail: soloceanic@yandex.ru Pp. 41-49.