Аннотация:White Sea coast provides a unique ability for studying of the ecological transformation of coastal lakes
by sea transgressions and regressions. In the western part of the White Sea, in particular, in the Coast of
Kandalaksha Gulf the shore undergoes a rapid glacioisostatic lifting. In the vicinity of the White Sea Biological
Station of Lomonosov Moscow State University (MSU) the speed of the uplift is at a rate of about 40 cm per
century. This, together with irregularity of the coastline, abundance of islands, alternation of hollows and
thresholds winding coastline and uneven topography provides favorable conditions for separating of the
bays from the sea and leads to appearance of many water bodies in various stages of separation. During
last years interdisciplinary researches of such reservoirs actively develop. Some faculties of MSU (faculties
of biology, geography and physics) and some institutes of academy of Sciences of Russia participate in
these field researches. As a result of a few years of investigation invention of the coastal lakes by now
we have data on more than 20 water bodies in various stages of isolation from the sea, including seven
meromictic lakes, five flow-through lagoons, four inlets with first signs of stratification, as well as seven
fresh lakes completely lost their connection with the sea. Water column of meromictic lakes inhabited by
unique microorganisms exercising anoxic photosynthesis. Hydrological structure of these lakes, thermal,
hydrochemical regime, optical properties, hydrobiological and microbiological features of these reservoirs
were studied. Results of long-term complex researches of these unique water objects are presented in this
report. This study was supported by the Russian Science Foundation (grant No. 14-37-00038).