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A new approach to the assessment of microplastic pollution of beach and bottom sediments of the coastal zone of the sea based on the study of their particle size distribution is proposed. A standard procedure for carrying out a complete granulometric analysis of the sediments in laboratory conditions is described. It uses the sieve method with and without washing with water adapted to the condition of their possible contamination with microplastics. Currently, this method is receiving practical approval during which the methods of processing beach and bottom sediments will be worked out and improved.

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The changes of the biophysical characteristics of light-emission in ontogenesis of ctenophore Beroe ovata Mayer, 1912 -recent introducer to the Black Sea has been researched. It is established, that bioluminescent amplitude of larvae was eight times higher, and energy of light-emission seven times more, than similar parameters of the bioluminescence in eggs of ctenophores. Amplitude and energy of light-emission of quite recently caught ctenophore (in control) were some orders more than similar parameters in ctenophores after spawning.The maximum bioluminescent amplitude values were observed in the group of ctenophores with eggs-laying. It was registered a significant increase of light-emission characteristics of ctenophores with increasing body. Substantiated conclusion, that distinctions in the bioluminescence parameters of ctenophores in ontogenesis can be caused by ontogenetic features of their biochemical structure and quantity involved in bioluminescent reaction photocytes.