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The coastal lakes of the Romanian Black Sea shore comprise significant ecosystems, characterized by marine, brackish and freshwater assemblages. Therefore, these lakes may be seen as biodiversity huge reservoirs and natural bio-filters. They offer natural resources linked to their high biological production and productivity. This paper is presenting the current research state in the field of quality assessment of the aquatic ecosystems, with special regards to the lakes occurring in the southern Romanian Black Sea...

The Techirghiol Lake, with a total surface of 1,462 ha, a length of 7,500 m and a maximum depth of 12 m, is situated on the NW Black Sea coast, south to the Constanta town. The lake is located in SE Dobrogea, a region that displays the highest density of lakes in Romania. These lakes were formed during the Quaternary, in relation with the Black Sea level fluctuations. Due to the low-level waters of the Lake Techirghiol, relative to the Black Sea one, the salty marine waters periodically invaded the lake. Genetical...