Biooceanographic characteristics of the bioluminescence fields in the Sevastopol coastal waters: results of long-term monitoring

by

A.V. Melnik 1, V.V. Melnikov 2, A.N.Serebrennikov 2, L.A.Melnik 2, O.V.Mashukova 1

1The A.O. Kovalevsky Institute of Marine Biological Research of RAS, RF, Sevastopol, Nakhimov Av., 2

Е-mail: melnikalexand@gmail.com

2Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

Е-mail: sevlin@rambler.ru

DOI: 10.33075/2220-5861-2019-1-79-87

UDC 591.148:574.583 (262.5)       

Abstract:

   In the present work the analysis of the state of plankton communities in the coastal waters of Sevastopol depending on the bioluminescence field dynamics was made. The relevance of such studies is undoubtful since the climatic changes in the Black Sea ecosystem resulted in appearing a huge number of new luminous invasive species. This work is based on the data obtained during the annual monitoring performed in 1966, on the basis of which the first information on the seasonal variability of bioluminescence in the Black Sea was obtained. Seasonal measurements of bioluminescence performed from 2008 up to 2015 at two stations inside the Sevastopol bay and in the open sea at 10-mile station on the traverse of the Kruglaya bay were also used for the analysis.

   Satellite data were used for the analysis of the sea surface temperature (2008–2017); the average annual values of chlorophyll (1998–2017); average annual values of sea level anomalies (1993–2018); average annual values of surface wind modules (1988–2017); average annual values of the zonal components of the surface wind (1988–2017); average annual values of the meridional components of the surface wind (1988–2017) in the region of Sevastopol. Results of this work show that as a result of the global warming, significant seasonal fluctuations in bioluminescence intensity occurred due to the seasonal dynamics of the species structure and quantitative development of plankton in the area of Sevastopol Bay and in the two-mile zone from it. Some changes in the seasonal intensity of the bioluminescence fields were observed with anomalous changes in the wind and, accordingly, in the water column temperature.

Keywords: Black Sea, bioluminescence field, temperature, salinity, monitoring.

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