It is offered to use change of parameters of a ecosystem radiocapacity by a radionuclide tracers in reply to harmful effect, as an anticipating parameter of ecosystems condition and reaction.
In model calculations was shown, that the essential effect on ecosystem is accompanied by converted or irreversible changes of radiocapacity parameters of ecosystem biotic components. It depends on value and duration of effect.
Changes in the radiocapacity factors by Cs-137 under influence an external gamma-irradiations were detected in preliminary experiments on water crops. It was marked the decreasing the radiocapacity factor of the plants rooted system in reply to an stress-factors influence.
Thus, the radiocapacity factors are possible to use as parameters of a ecosystem condition and well-being at various chemical, physical and biological effects.