Julia Polunina

• PhD
• Senior Researcher at Institute of Oceanology. PP Shirshov Russian Academy of Sciences

Проанализированы данные по видовому составу, встречаемости и распределению летнего зоопланктона в юго-восточной части Балтийского моря по данным 2018 и 2022 гг. Зоопланктон в период исследований был представлен 29 видами и таксонами более высокого порядка: Rotifera – 5, Copepoda – 11, Diplostraca – 9, Scyphozoa – 2, Ctenophora – 1, Appendicularia –...

The current state and changes in biological communities of the Russian part of the South-Eastern Baltic Sea during two first decades of twenty-first century is considered. In phytoplankton, some typical cold-water dominants have been lost from the spring complex of species and the productivity of summer phytoplankton has been 4–7 times higher in so...

The long-term study of aquatic communities and hydrochemical parameters of the coastal zone of the western part of the Curonian Lagoon was continued. Depending on season, typical species of diatoms, greens and charophytes and potentially toxic cyanobacteria dominated in phytoplankton. Based on the average seasonal biomass, the coastal zone was char...

The article describes the state of phyto- and zooplankton, macrophytes and macrozoobenthos in the coastal zone of the Cu- ronian Lagoon during the vegetation period of 2022. Cyanobacte- ria and diatoms dominated in phytoplankton. Average seasonal biomass of phytoplankton corresponded with hypertrophic condi- tions. A sharp change in the composition...

The embryos within the egg envelope (eggs) and cydippid stage larvae of alien species of ctenophore Mnemiopsis leidyi were recorded in the South-Eastern Baltic Sea (within the economic zone of the Russian Federation) in the autumn of 2021. The adults of Mnemiopsis leidyi were not found. The data on the occurrence and distribution of ctenophore in t...

In 2021, potentially toxic cyanobacteria Planktothrix agardhii (all dates) and species of the genus Microcystis (July) as well as diatoms Diatoma tenuis, Nitzschia cf. vitrea (April), Actinocyclus normanii (September) dominated in the phytoplankton of the western coastal water area of the Curonian Lagoon; According to the production indicators of p...

In 2014–2018, large-scale hydrotechnical works were carried out in the estuary of the Pregolya River. The structural changes in the summer zooplankton in the river mouth in 2019 were revealed in comparison with the data obtained prior the riverbed transformation. In June 2019, zooplankton total abundance and biomass were of (136 ± 111) thousand ind...

The structural parameters of plankton, benthos and macrophytes after large-scale technogenic transformation of the mouth area of the river were studied. Pregolya. A decrease in the species richness and area of growth of macrophytes, a simplification of the structure of communities was noted. The renewal of plant communities in the places of their o...

Preliminary data on the state of biological communities after the technogenic transformation of the Pregolya riverbed in Kaliningrad are presented. In the summer 2019, significant changes in the species composition and structure of macrophyte communities were revealed: reed communities and several organic pollution-sensitive species disappeared; th...

Впервые представлены современные сведения о популяционных характеристиках вида-фильтратора Eubosmina maritima в южной и центральной части Балтийского моря в вегетационный период 2016 г. Доля этого вида в общей численности и биомассе зоопланктона составляла около 40 % и 30 % соответственно. Выявлены особенности горизонтального и вертикального распре...

In the 34th and 36th cruises of the r/v Akademik N. Strakhov, performed in the summer and autumn of 2017, the structure of the waters was studied on transects located along the route of inflow of saline North Sea waters into the Baltic Sea. Vertical profiling was performed with intervals between stations no more than 2 miles, in the free-fall mode,...

Were found peculiarities of the structure and distribution in the autumn plankton of the South -Eastern part of the Baltic sea (SEB) in October 2015 taking into account hydrological and hydrochemical data. There were no changes registered as to the taxonomic composition of phyto- and zooplankton, including no increase in the number of the stenother...

Specific features of the structure and distribution of autumn zooplankton in the southeastern Baltic Sea (SEB) in October 2015 have been found taking into account the hydrological and hydrochemical data. No changes have been detected in the taxonomic composition of phyto- and zooplankton, including the increase in the number of stenothermic and ste...

Three nonnative crustacean species have been registered in the zooplankton of the South-Eastern Baltic Sea (SEB). Calanoid copepod Acartia tonsa and cladoceran Cercopagis pengoi have established sustainable self-reproducing populations in the SEB. The successful development of the A. tonsa population is supported by its ability to produce diapausin...

The analysis of composition, seasonal and interannual dynamics, and productivity of phytoplankton, zooplankton, and zoobenthos as well as detailed characteristic of aquatic flora of the Pregolya River are given. It is shown that the biota of anthropogenically transformed lower reach recovered partially during the 2000s.

The Ponto-Caspian cladoceran Evadne anonyx (G.O. Sars, 1897) was recorded in the summer zooplankton of the Southeastern Baltic (SEB) in 2010–2011. The quantitative parameters of the species were low. The share of the introduced species in the total abundance and biomass of zooplankton was not significant. The population of E. anonyx was represented...

Early and prolonged bisexual reproduction has been registered in the population of Cercopagis pengoi within the Vistula Lagoon relative to its original habitat. Decrease in the role of parthenogenesis and increase in the frequency of gamogenesis have been registered in the population under study. It has been accompanied by reduction in the average...

Early and prolonged sexual reproduction has been registered in the population of Cercopagis pengoi within the Vistula Lagoon relative to its original habitat. Decrease in the role of parthenogenesis and increase in the frequency of gamogenesis have been registered in the population under study. It has been accompanied by reduction in the average nu...

In the Vistula and Curonian lagoons, respectively, 7 and 9 taxa of under-ice zooplankton have been recorded. Copepoda and rotifera were dominant. Throughout the year, the complex of dominant species was generally constant in the Vistula Lagoon and changed considerably in the Curonian Lagoon. The zooplankton accumulation was found in the surface lay...

В коллективной монографии обобщены данные гидробиологических исследований АО ИО РАН 1995–2013 гг. в реке Преголе, водосбор которой охватывает почти всю Калининградскую область, а речной сток является важнейшим режимообразующим фактором для Вислинского залива Балтийского моря. Проанализированы основные антропогенные и природные факторы, определяющие...

Short characteristic of non-indigenous invertebrate fauna of the Curonian and Vistula Lagoons (Baltic Sea), together with the list of alien species for both water-bodies, are given at a base of inventory study of ABIORAS in 1996-2008. The main ways and vectors of the introductions are listed.

Polunina J.J. On possible regulation of cladocerans reproductive characteristics by hormones of vertebrates // Abstracts of Baltic Sea Science Congress (Rostock, Germany, 19-22 March, 2007)

Polunina Ju. Changes in the life-cycle of Ponto-Caspian cladoceran crustacean Cercopagis pengoi (Ostroumov, 1891) in the Baltic Sea

The distribution and population structure of two predatory cladocerans - the native Leptodora kindtii (Focke, 1844) and the non-indigenous Cercopagis pengoi (Ostroumov, 1891), were studied in the Vistula Lagoon (Baltic Sea) during the 1996-2000 period. A species of Ponto- Caspian origin, C. pengoi was introduced to the lagoon by sea currents in Aug...