러시아ㆍ유라시아

Вased on the long time (1980-2012) of hydrochemical and hydrobyological data collected by the State Supervision Service (SSS), the assessment of ecological risk of major Russian rivers: Volga, Don, Lena and Kolyma was conducted. The environmental risk of human intervention on mouth ecosystems is considered as a probability of negative changes. For all researched mouth ecosystems, the human intervention effect is reached through the enhance of human intervention regress of aquatic organisms, which serves as an ecological level identifier: low level stands for Volga and Don rivers, middle for Lena and Kolyma.