Current trends in biota changes of the Khibiny mountains freshwater ecosystems

By the example of subarctic lake-river system the modern tendencies of algal, benthos and fish communities under multiple-factor anthropogenic influences of apatite industry as well as natural conditions have been investigated using the comprehensive watershed approach. Species composition and structure of the communities, population characteristics and particularities of hydrocole responses on different impacts have been inventoried. The watersheds particularities of the water quality formation of the arctic waterbodies have been analyzed taking into account the landscape conditions, the technogenic transformation degree of ecosystems and the intensity and duration of pollution. Besides the information of modern status and tendencies of biosystems modifications have been obtained.