The problem of state assessment and change forecast in the whole
ecosystems and in the vegetation structure in particular makes a basis of
modern biogeographical, geobotanical, biocenological and ecological studies.
The main task is to study spatial-temporal self-organization of phytocenoses
under different physical-geographic conditions reflecting practically all
changes in the environment for a concrete time period. With such an approach, a
phytocenosis is considered as a system, which forms and develops as united one
and forms interdependent links with systems of other hierarchical level, with
ecotopes conditions, and with territorial attachment in general. As methods for
definition of long-term trends in the dynamics of vegetation cover structure
are mainly at different stage of development, it causes to researchers a series
of problems from choice of concept basis to notions and terms establishment for
the revealed processes and states of the plants and of the ecosystem in
general. Solution of such tasks inevitably results in the necessity to correct
the existing understanding of processes occurring in vegetation and allows outlining
a direction of their development in the system of natural factors of any
territory. This results in the appearing of basis for determination of age,
site and role of current states of phytocenoses in successional systems. It is necessary for this to reveal the
peculiarities of phytocenoses composition and combining connected with
natural dynamics of environmental factors, environmental factors with impact of
the anthropogenic factors as well. To study structural-dynamical organization
of phytocenoses under transitional different environmental conditions of a
definite genesis and territorial attachment it’s necessary to use the
definitions of “ecotones” and “paragenese” (an object) as phytocenotically
separate natural phenomena characterizing the structural peculiarities of cenoses
appropriate for interzonal, interbeltic, intrazonal and intrabeltic
environmental conditions as well.
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