Abstract
The results of content estimation of 8-e most common toxic heavy metals in the water column of the North-Eastern Black Sea in 2000-2019 are presented. Annual ranges for the content of individual heavy metals in the water column are given. Identified values have been compared with the pollution levels for the water bodies of fisheries importance as they are defined in the relevant normative and regulatory framework. Cases of exceedance of maximum permissible concentrations of copper, mercury, zinc, manganese, and iron have been recorded at all sampling depths in various seasons and years. The link to the coastline was carried out, the most problematic areas in terms of anthropogenic load were identified. A brief description of each of the metals under consideration is given. The quantitative characteristic of the increased concentrations of certain heavy metals is presented in terms of the MPC multiplicity. Seasonal dynamics of the content of particular metals in sea water during the entire course of the investigation (2000-2019) is shown. Trends and patterns in variations of their concentrations at the present time are assessed. Possible influence of increased content of the aforementioned elements on comfort the habitat of aquatic living organisms is considered.
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