The Arctic Ocean may be a sensitive indicator of global climate changes.In the last decade, the extent of summer Arctic sea ice has decreased dramatically and in 2012, the summer catastrophic reduction reached its lowest ever recorded sea ice extent.Increasing numbers of studies have shown the strong relationship between ciliate communities and environmental conditions and ciliates could be used as a bioindicator.The limnological and physiochemical variability could be measured easily by modem technique, however, the instantaneous measurement could not give enough information to understand how the environmental changes influence the living creatures habitat condition, and we still cannot predict whether ongoing climate changes will affect ciliated microzooplankton in Arctic regions because community-level observations are scarce.