статья в журнале

En

GEOCHEMISTRY INTERNATIONAL

ISSN:0016-7029
eSSN:1556-1968

2022

Zalevskaya, I.N.¹

Shaida, V.G.¹

Memetlaeva, G.N.¹

Scherba, A.V.¹

10.1134/S0016702922020082

Migration of nutrients is studied in five drying salt lakes belonging to the Yevpatoriya Group (Crimea). The nutrients enter in the Crimean salt lakes from natural sources, in particular, atmospheric precipitation, erosion materials, seawater overflow during storms, products of vital activity of birds and animals grazing on coasts, processes in ecosystems (eutrophication and vital functions of aquatic organisms). Nitrogen and phosphorus are also supplied with runoff directly in water bodies and indirectly via ground waters, and recreation activity on the lake coasts. An increase of air temperature above +30 degrees C in summer caused intense evaporation and drying up of the lakes. In drying water bodies, the natural processes of the nitrogen and phosphorus migration are terminated due to cessation of biota functioning, especially of microalgae, microbial communities and crustacean Artemia. In drying periods, nitrogen, phosphorus, and pollutants are accumulated and concentrated on the bottom sediments and during strong storms and winds are propagated over adjacent territory and, respectively, represent a threat to human health. The paper discusses the possible scenario of the transformation of ecosystems of saline lakes under possible climatic warming and increasing anthropogenic impact.

hypersaline lakes, Crimea, drying out, seasonal fluctuations, hydrochemical parameters, nutrients, anthropogenic impact

2022-04-11 11:09:43