S.A. Seregin, E.V. Popova
The A.O. Kovalevsky Institute of Marine Biological Research of RAS, RF, Sevastopol, Nakhimov Av., 2
Studies were conducted in the coastal waters of the Black and Azov Seas (in the Crimea region) from 25 to 30 October 2016. At 18 stations 51 samples were collected in the upper 30-40-meter layer of the Black Sea waters; in the Azov sea 8 samples were taken in the surface and bottom layers at 4 stations. The weighted average content of microzooplankton in the studied layer of the Black Sea waters varied from 40 to 147, averaging 102 thousand ind. m-3. In the Azov Sea the number of MMZP varied from 18 to 267 thousand. ind. m-3 in the habitat layer there were 63 thousand. ind. m-3 on average. Quantitative parameters of MMZP abundance are comparable with the level of the 1980s and indicate the recovery of the zooplankton community of the Black Sea after its crisis in the 1990s. The patterns of spatial distribution as a whole repeated those of the previous observations in different seasons of the year: the abundance peaks were observed in the coastal areas of the Karkinit and Kalamit bays and in general along the western coast. The southern coastal waters of Crimea were characterized by the lowest abundance values; the waters of the south-eastern part of the Crimean coast occupied the intermediate position. In the Azov Sea the number of MMZP ranged from 18 to 267 thousand ind. m-3; in the habitat layer there were on average 63 thousand ind. m-3. The species structure of the MMZP in the Black Sea was routinely determined by the predominance of the cancer fraction, which at the time of the year averaged 97.6% and was completely composed of the Black Sea copepods. An average 85% of these (73 to 93%) accounted for individuals of the invader Oithona davisae. In the Azov Sea the ratio of crayfish and non-crayfish plankton was 57% and 43% of the total abundance, respectively.
Keywords: metazoan microzooplankton, abundance, species composition, spatial distribution, the coastal zone of the Black and Azov Seas.
LIST OF REFERENCES
- Shushkina, E. A., Nikolaeva, G. G., and Lukasheva, T. A. Changes in the structure of the Black Sea plankton community during mass development of Mnemiopsis leidyi (Agassiz), journal of General biology. 1990. Vol. 51, No. 1. P. 54-60.
- Seregin S. A., Popova E. V. Metazoic microzooplankton in the Crimean coast of the Black and Azov Seas in the spring: composition, abundance and spatial distribution // Journal of the Siberian Federal University. Biology. 2019. Vol. 12, No. 2. DOI: 10.17516/1997-1389- 0286.
- Seregin S. A., Popova E. V. Bacterioplankton and metazoic microzooplankton in the waters of the Black sea off the coast of Crimea in the summer of 2010. 2012. Vol. 11. No. 2. P. 65-74.
- Seregin S. A., Popova E. V. Metazoic microzooplankton of the North Black Sea waters: abundance and composition in summer // International Scientific Institute “Educatio”. Monthly scientific journal. 2015. No. 3 (10). Part 6. P. 166-171.
- Seregin S. A., Popova E. V. Species composition and abundance of metazoic microzooplankton in the North-Eastern part of the Black Sea in the summer of 2013 // Marine biological journal. 2016. Vol. 1. No. 3. P. 35-41.
- Seregin S. A., Popova E. V. Micrometazooplankton of the Black Sea waters of the Crimea: abundance, species diversity, Trends of changes // Marine biological research: achievements and prospects: sat. mater. Everything is fine. scientific and practical Conf. (Sevastopol, September 19-24, 2016). Sevastopol: EKOSI-Hydrophysics, 2016. Vol. 2. Pp. 426-429.
- Zaika V. E., Moryakova V. K., Ostrovskaya N. A., Tsalkina A.V. Distribution of marine microzooplankton. Kiev: Naukova Dumka, 1976. P. 92.
- Kovalev A.V. Tools and method of total accounting of marine micro – and mesozooplankton // Ecology of the sea, 1980, Issue 3, P. 61-64.
- Ostrovskaya N. A., Scriabin V. A., Zagorodnyaya Yu. A. Microzooplankton / Ed. Plankton of the Black sea. Kiev: Naukova Dumka, 1993. P. 165-183.
- Determinant of the fauna of the Black and Azov Seas: in 3 vols. t. 2: free-Living invertebrates. Crustacea. / Academy of Sciences of the Ukrainian SSR. Institute of biology of the South seas. Kiev: Naukova Dumka, 1969. P. 536.
- Sazhina L. I. Nauplii of mass species of pelagic copepods of the world ocean. Kiev: Naukova Dumka, 1985. P. 238.
- Ostrovskaya N. A., Moryakova V. K. Uneven distribution and variability of concentrations of microzooplankton in the Black Sea in the late summer period // Dynamics of waters and productivity of plankton in the Black Sea. – M.: Coord. center of COMECON member countries on Probl. “World ocean”, 1988. – P. 323 – 340.
- To study the dependence of the distribution and quantity of plankton in the boundary hydrogen sulfide zone on its thickness and depth in the Black sea / N. A. Ostrovskaya, T. M. Kovaleva, V. V. Murina [et al.] / / Modern problems of Oceanology of the Black sea. Part 2. Marine Hydrophysics. in-t of the Ukrainian SSR. Sevastopol, 1986. 250 p. DEP. in VINITI 17.09.86; No. 6700–B86. P. 411 – 443.
- State of the zooplankton community in the Sevastopol Bay after the introduction of Beroe ovata into the Black sea (1999 – 2003) / E. S. Gubareva, L. S. Svetlichny, Z. A. Romanova [et al.] / / Marine ecological journal. 2004. Vol. 3. No. 1. P. 39-46.
- Finenko G. A., Romanova Z. A. Population dynamics and energy of Mnemiopsis leidyi in Sevastopol Bay // Oceanology. 2000. 40, no. 5. P. 720-728.
- Vdodovich I. V. Species diversity and nutrition of larvae of summer-spawning fish species in the coastal zone of the Black Sea: dis. … Cand. Biol. Sciences: 03.00.17. Sevastopol, 2011. P. 166.
- State of ichthyoplankton in the estuary of the Sevastopol Bay (Black Sea) / T. N. Klimova, I. V. Vdodovich, S. M. Ignatiev, S. A. Seregin [et al.] / / Journal of the Siberian Federal University. Biology. 2017. 10 (1). P. 74-86.