DOI:10.30694/1026-5600-2018-1-108-121

Features of the distribution of microplastics on sandy beaches of the Kaliningrad region (the Baltic Sea)

Esiukova E. E. , Chubarenko I. P.

Abstract

The aim of the work is to reveal the features of the distribution of microplastic particles within the sandy beaches of the Baltic Sea and to establish a possible correlation between the presence of plastic particles and that of natural inclusions (amber, paraffin, coal, etc.) in the sand samples. For this study, beaches with significantly different anthropogenic pressures on the coast of the Kaliningrad region (the Russian sector of the southeastern part of the Baltic Sea) were chosen. The sampling was carried out in spring of 2016. The samples were collected from both the surface layer of the beach and the body of the beach sediments. In total, 62 samples from five different beaches were processed. Methods of collection and processing of samples (using the modified NOAA method for extraction of microplastic from samples) as well as criteria for the identification of plastics were described in detail. Primary analysis of the granulometric composition of sandy beach deposits at the sampling sites was performed, and an attempt was made to establish a relationship between the sand grain size and the content of microplastics. The analysis showed that the concentrations of microplastic in individual samplesof sand from different beach areas range from 2 to 572 units per kilogram of dry sample. Our study demonstrated that the amount of microplastic on sandy beaches can be largely underestimated if based only on data for the sand samples collected from the surface layers of the beach. We found that microplastic is present everywhere - both in the wrack lines and in the surface layer and in the body of beach sediments. Analysis of possible correlation between the presence ofmicroplastics and that of other inclusions (of natural or anthropogenic origin, like amber, paraffin, etc.) in samples of sand from various layers of the beach showed that the pattern of distribution of such objects in the body of beach sediments can play an important role in establishing and explaining the vertical structure of the micropartics distribution in the sediment column. In particular, amber is one of the markers of the presence of microplastic in the body of the beaches of the Kaliningrad region.

Keywords:

microplastic, Baltic Sea, body of beach sediments, sandy beach, pit, wrack line, amber



For citation: Esiukova E. E., Chubarenko I. P. Osobennosti raspredeleniya mikroplastika na peschanyh plyazhah kaliningradskoy oblasti (baltiyskoe more) [Features of the distribution of microplastics on sandy beaches of the Kaliningrad region (the Baltic Sea)]. Regional`naya ecologiya [Regional Ecology], 2018. № 1(51). pp.108-121. (In Russian). DOI:10.30694/1026-5600-2018-1-108-121


About authors:

Esiukova E. E.

Affiliation: Shirshov Institute of Oceanology, Russian Academy of Sciences
Address: 36, Nakhimovskiy pr., Moscow, 117997, Russia

Chubarenko I. P.

Affiliation: Shirshov Institute of Oceanology, Russian Academy of Sciences
Address: 36, Nakhimovskiy pr., Moscow, 117997, Russia


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