Khokhlovaa , Maria A. Baturinaa , Olga A. Loskutovaa , , and Olga P. Dubovskaya b,c 28 Kommunisticheskaya Str., GSP-2, Syktyvkar, 167982, Russia b aInstitute of Biology, Komi Scientifi c Centre, UB RAS Institute of Biophysics SB RAS Siberian Federal University 50/50 Akademgorodok, Krasnoyarsk, 660036, Russia c 79 Svobodny, Krasnoyarsk, 660036, Russia Received 28.11.2013, received in revised form 14.01.2014, accepted 21.03.2014 Kharbeyskie Lakes situated on the North-East of the European Russia were sampled. <...> The aim of the present work was to evaluate the changes in the lakes ecosystems which took place during more than 40 years since the fi rst sampling in 1960’s. <...> Faunal richness of aquatic communities changed insignifi cantly under warming climate and low anthropogenic impacts. <...> Nevertheless, the following changes in zooplankton community of the lakes can be considered as the signs of their oligotrophication: the abundance of species indicating oligotrophic water has increased, the abundance of species indicating eutrophy has decreased, the crustacean role comparing the role of rotifers in zooplankton in quantitative terms has grown, faunal coeffi cients of trophy (E, E/O) have reduced. <...> According to the structural characteristics of zooplankton the large Kharbeyskie lakes are oligotrophic at present. <...> Zoobenthos is more inert community than zooplankton under infl uence of environmental changes. <...> According to the data on zoobenthic abundance, biomass, composition and structure, the Kharbeyskie Lakes are mesotrophic ecosystems as well as they were in 1968 and 1969. <...> Some dynamic features of the studied aquatic communities indicate a warming infl uence on the ecosystem of the Kharbeyskie Lakes <...>