Influence of increasing sea surface temperature on the mussel recruitment off the southwestern coast of Crimea

I.I. Kazankova

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


DOI: 10.33075/2220-5861-2020-3-133-138

UDC 574.34: 57.045 


   The article discusses the possibility of a connection between an increase in the temperature of the surface layer of water and a decrease in the potential replenishment of the Black Sea population of the mussel Mytilus galloprovincialis recruitment off the southwestern coast of Crimea in recent decades. The considered biological parameter is characterized by the number of mussel post-larvae, formed planktonic larvae that settled on the experimental substrate per unit of time (usually a month). The study of water temperature variability in the region showed that from the 80s of the last century to the present, there has been an increase in the average annual temperature of the surface water layer by about 2 ° C. The maximum increase in water temperature was noted during the warm period of the year, especially in June, July and September – during these months it was about 5 ° C.

   This ecological change took place against the background and, very likely, due to the previously noted processes of global warming, freshening of the surface layer of the Black Sea, a decrease in its vertical mixing, a decrease in the frequency and duration of coastal upwellings, and an increase in the eastern component in the surface wind speed in the region, contributing to the intensification of surge phenomena off the coast of Crimea. All these processes can lead to a decrease in the productivity of the surface layer of the sea, and, consequently, in the reproductive potential of the mussel population, as well as to a decrease in the probability of its larvae appearing in mass number at the stage of settling in the coastal zone during upwellings. In addition, a significant increase in the temperature of surface water in the Black Sea in the warm season can contribute to the food and reproductive activity of the predatory Rapana, feeding mainly on mussels, as well as to the survival of its juveniles. Thus, an increase in the temperature of the surface layer of the sea and the processes leading to this increase can directly or indirectly contribute to a decrease in the potential recruitment replenishment of the mussel and a decrease in reproduction of its population in the Black Sea.

Keywords: Black Sea, global warming, ecological processes, monitoring of coastal waters.

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  1. Yeletskiy B.D. The concept of conservation and use of stocks of bivalve molluscs mussel Mytilus galloprovincialis Lam. in the eastern part of the Black Sea: author. dis. … Dr. biol. Sciences: 03.00.32, 03.00.23. Krasnodar. 2006. 46 p.
  2. Stadnichenko S.V., Shurova N.M., Zolotarev V.N. Spatio-temporal changes in the population of mussels (Mytilus galloprovincialis) in the northwestern part of the Black Sea // Zoocenosis-2013: Biodiversity and the role of animals in ecosystems: VІІ Intern. scientific. conf. (Dnepropetrovsk, October 22-25, 2013). 2013. P. 68–70.
  3. Petrova-Pavlova E. Non-fish marine resources and their exploitation along the Bulgarian Black Sea coast // Agricultural Science and Technology. 2014. Vol. 6. № 2. P. 215–218.
  4. Species richness and quantitative and development of macrozoobenthos of Zernov’s phylophoric field / N.K. Revkov, N.A. Boltacheva, I.P. Bondarev [et al.] // Marine biological research: achievements and prospects: collection of articles. mater. All-Russian scientific-practical conf. (Sevastopol, September 19–24, 2016). 2016. Vol. 2. P. 126–129.
  5. Long-term changes in the macrofauna of rocks in the upper sublittoral zone near the Karadag (Black Sea) / N.А. Boltacheva, M.A. Kovaleva, M.V. Makarov [et al.] // 100 years of the Karadag scientific station named after T.I. Vyazemsky: collection of scientific. works. Simferopol. 2015. P. 530–548.
  6. Morozova A.L., Smirnova Yu.D. Transformation of natural ecosystems of coastal waters of the Karadag reserve / Modern problems of ecology of the Azov-Black Sea basin: Materials of the II Intern. conf. (Kerch, June 26–27, 2006). 2006. P. 17–24.
  7. Govorin I.A., Shatsillo E.I. Interannual changes in the quantitative indicators of periphyton settlements of mussels Mytilus galloprovincialis and mytilaster Mytilaster lineatus near the Odessa coast of the Black Sea // Bulletin of the Odessa University. Biology. 2016. Vol. 21. № 1 (38). P. 117–129.
  8. Kazankova I.I. Definition of the potential recruitment of mussel, mitilyaster and anadara settlements in the coastal waters of the Black and Adriatic seas using experimental substrates // Environmental Control Systems. 2019. Issue. 3 (37). P. 112–119.
  9. Characteristics of the bioluminescence field in the coast of Sevastopol: results of long-term monitoring / A.V. Melnik, V.V. Melnikov, A.N. Serebrennikov [et al.] // Environmental control systems. 2019. Issue. 1 (35). P. 79–87.
  10. Ilyin Y.P. Observed long-term changes in the Black Sea physical system and their possible environmental impacts // Climate Forcing and its Impacts on the Black Sea Marine Biota. CIESM Workshop Monogr. 2009. №. 39. P. 35–43.
  11. Kuklin A.K., Kuklina N.Ya., Shabalina O.A. Sea water temperature in the area of the oceanographic platform in Katsiveli // Environmental safety of coastal and shelf zones and integrated resource use. 2014. №. 28. P. 186–194.
  12. Karnaushenko N.N., Pogrebnoy A.E. The main features of the variability of atmospheric processes and fields of the Black Sea coastal zone near the western and southwestern coasts of Crimea on time scales from day to day to long-term // Environmental safety of coastal and shelf zones and integrated use of shelf resources. 2003. Issue. 2 (7). P. 162–176.
  13. Breton S., Capt C., Guerra D. [et al.]. Sex Determining Mechanisms // Bivalves: Preprints201706.0127. 2017. Vol. 1.
  14. Peculiarities of seasonal dynamics of Mytilus galloprovincialis larvae numbers in the coastal zone of the Crimea (based on long term data) // Hydrobiological Journal. 2014. Vol. 50. № 3. P. 13–20.