Qidiruv

a concept, introduced by A.Tensly, meaning a rather stable system of dynamic equilibrium, in which organisms and inorganic factors are full components. In other words, E. represents organisms, jointly operating on a section, and their communities interacting with environment.

— progressive development as a result of interaction of autochthonous and allochthonous processes in an ecosystem on considerable territories.

capacity of a particular part of an ecosystem to change the qualitative indexes.

1. ecosystem, in a biotope of which there is prevail water as a liquide (e.g., lake, pond, swamp);

2. It means use of water of any kind, in and outside the river, lake or aquifer.

ecosystem disposed overland (e.g., oak forest, meadow, steppe).

time approximately twice superior the proper time of a community generating it.

qualitatively new properties, which are impossible to forecast, proceeding from the sum of properties of ecosystems' components.

magnitudes, indexes, reflecting fundamental properties of ecosystem: biological productivity, intensity of a turnover, diversity, etc.

а capacity of a landscape (ecosystem) to save in the basic features its structure and nature of interelement ties, despite of exposures.

a property reversed to stability — inability to resist exposures.

amount of organic matter produced in a unit of time per a unit of area by living organisms, included in composition of this or that ecosystem (e.g. kg / hectare per a year). Sometimes is valued by the speed, with which the energy is acquired by organisms (e.g., kkal / m of a living matter per a year).

influencing of activity of people on structure and operation of ecosystems (landscapes). A.i.e. are classified by directions and forms of person's activity (agricultural, industrial), direction of exchanging by matter and energy (exception, introduction), duration of influence, regimen of exposure (constant, periodic, cyclical), by consequences of influence (positive, negative), etc.

a limiting value of an ecosystem’s condition parameter, at which significant reversible changes of ecosystem start, that stay within the boundaries of stability area.

a limiting value of a state parameter of an ecosystem (on boundary of its stability region), at which one the irreversible variations of an ecosystem begin.

artificially cultivated ecosystem (biogeocenosis), the basic functions of which (first of all, productivity) are maintained by a system of agronomical measures (ploughing, usage of fertilizers, chemical weed-killers and pest-killers, etc.). It differs from natural biogeocenosis by simplicity and, as a rule, by prevalence of cultural plants. Without support of a man, A. is quickly disintegrated, reverting to its natural state.