scholarly journals First record of Pseudodiaptomus marinus (Copepoda: Calanoida: Pseudodiaptomidae) in the Black Sea (Sevastopol Bay)

2016 ◽  
Vol 1 (4) ◽  
pp. 78-80 ◽  
Author(s):  
O. A. Garbazey ◽  
E. V. Popova ◽  
A. D. Gubanova ◽  
D. A. Altukhov
Keyword(s):  
Black Sea ◽  
Structural Changes ◽  
The Black Sea ◽  
Mnemiopsis Leidyi ◽  
Northwestern Pacific ◽  
Basin Scale ◽  
Wide Range ◽  
Sevastopol Bay ◽  
Pseudodiaptomus Marinus

Pseudodiaptomus marinus was initially discovered at the end of September 2016 in a sample taken during a long-term plankton survey of Sevastopol Bay started in 2002. We found 6 females and 12 copepodites (I-V stages) of P. marinus at the center of Sevastopol Bay (St. 3) on September 22. At the mouth of Bay (St. 2) the species was not found. Both females and copepodite stages I-V of P. marinus were found at the both stations on November 11. Abundance of P. marinus increased to 1236 individuals in sample (1373 ind/m3) at the center of the bay. Moreover, two individuals of P. marinus nauplii identified by Sazhina, were found in this sample. At the mouth of the bay abundance of the invasive species reached 103 individuals in sample (103 ind/m3). It is considered to be native to the Northwestern Pacific Ocean, but now species is widespread across the world. Brilinski described in details its distribution in the World's oceans. Recently P. marinus has been found in the Atlantic Ocean in the North Sea and in the Mediterranean Sea. P. marinus is a typical estuarine coastal copepod, living in shallow eutrophic inshore waters. It is tolerant to a wide range of salinity (2.5-35 ptt) and temperature (5-28 ºC) and has the highest invasive potential. Thus species is adapted to relatively low salinities and low winter temperatures of the Black Sea. Copepodite stages at both stations indicate the existence of reproducing populations. Thus, very likely P. marinus is the new established species in coastal area of the Black Sea. As other recent pelagic invaders – the copepods Acartia tonsa Dana 1849, Oithona davisae Ferrari F. D. & Orsi 1984; ctenophores Mnemiopsis leidyi A. Agassiz, 1865 and Beroe ovata Bruguiere, 1789 - P. marinus was most probably brought into Sevastopol Bay in the ballast water of ships. Long-term studies at basin scale are needed to estimate the structural changes in the Black Sea zooplankton community.

scholarly journals Modeling long-term changes of the Black Sea ecosystem characteristics

2012 ◽  
Vol 9 (3) ◽  
pp. 2039-2080 ◽  
Author(s):  
V. L. Dorofeyev ◽  
T. Oguz ◽  
L. I. Sukhikh ◽  
V. V. Knysh ◽  
A. I. Kubryakov ◽  
...  
Keyword(s):  
Black Sea ◽  
Inorganic Nitrogen ◽  
The Black Sea ◽  
Mnemiopsis Leidyi ◽  
Biogeochemical Model ◽  
Food Web Structure ◽  
Decadal Scale ◽  
Basin Scale ◽  
Long Term Changes

Abstract. A three dimensional coupled physical-biological model is provided for the Black Sea to investigate its long-term changes under the synergistic impacts of eutrophication, climatic changes and population outbreak of the gelatinous invader Mnemiopsis leidyi. The model circulation field is simulated using the high frequency ERA40 atmospheric forcing as well as assimilation of the available hydrographic and altimeter sea level anomaly data for the 30 yr period of 1971–2001. The circulation dynamics are shown to resolve well the different temporal and spatial scales from mesoscale to sub-basin scale and from seasonal peaks to decadal scale trend-like changes. The biogeochemical model includes the main vertical biological and chemical interactions and processes up to the anoxic interface zone. Its food web structure is represented by two phytoplankton and zooplankton size groups, bacterioplankton, gelatinous carnivores Mnemiopsis and Aurelia, opportunistic species Noctiluca scientillans. The nitrogen cycling is accommodated by the particulate and dissolved organic nitrogen compartments and the dissolved inorganic nitrogen in the forms of ammonium, nitrite and nitrate. The ecosystem model is able to simulate successfully main observed features and trends of the intense eutrophication phase (from the early 1970s to the early 1990s), but points to its modification to simulate better the ecosystem conditions of the post-eutrophication phase.

Oithona davisae: naturalization in the Black sea, inter-annual and seasonal dynamics, effect on the structure of the planktonic copepod community

2019 ◽  
Vol 59 (6) ◽  
pp. 1008-1015
Author(s):  
A. D. Gubanova ◽  
O. A. Garbazey ◽  
D. A. Altukhov ◽  
V. S. Mukhanov ◽  
E. V. Popova
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
Native Species ◽  
Significant Decline ◽  
Acartia Tonsa ◽  
The Black Sea ◽  
Copepod Community ◽  
Oithona Davisae ◽  
Sevastopol Bay

Long-term (20032014) routine observations of zooplankton in Sevastopol Bay (the Black Sea) have allowed the naturalization of the invasive copepod Oithona davisae to be studied in the Black Sea coastal waters. Inter-annual and seasonal variability of the species and their impact on the native copepod community have been analyzed. The invasion of O. davisae and their undoubted dominance in terms of abundance were shown to alter the community structure but, at the same time, the abundances of the native species did not decrease, excepting the Black Sea earlier invader Acartia tonsa. A significant decline in A. tonsa numbers over the stages of O. davisae establishment and naturalization provided evidence of competition between the species. O. davisae have been demonstrated to gain competitive advantage over A. tonsa, that ensured their fast dispersal in the Black Sea, acclimatization in the new habitat and the successful competition over native species.

Long-term Changes in Sevastopol Bay (the Black Sea) with Particular Reference to the Ichthyoplankton and Zooplankton

2001 ◽  
Vol 52 (1) ◽  
pp. 1-13 ◽  
Author(s):  
A.D. Gordina ◽  
E.V. Pavlova ◽  
E.I. Ovsyany ◽  
J.G. Wilson ◽  
R.B. Kemp ◽  
...  
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Sevastopol Bay ◽  
Long Term Changes

Changes in appendicularian Oikopleura dioica abundance caused by invasion of alien ctenophores in the Black Sea

2005 ◽  
Vol 85 (3) ◽  
pp. 477-494 ◽  
Author(s):  
Tamara Shiganova
Keyword(s):  
Black Sea ◽  
Standing Stock ◽  
Zooplankton Community ◽  
The Black Sea ◽  
Mnemiopsis Leidyi ◽  
Total Zooplankton ◽  
Oikopleura Dioica ◽  
Beroe Ovata ◽  
Term Data

Oikopleura dioica is the only recorded appendicularian in the Black Sea. During the last two decades major changes in the O. dioica population size as well as total zooplankton community structures were recorded when invasive ctenophore species appeared in the Black Sea ecosystem. The state of the O. dioica population, before the invasion of ctenophores Mnemiopsis leidyi and Beroe ovata, is reviewed. The effect of the invasion of these ctenophores on the total zooplankton and particularly on the O. dioica standing stock is summarized from our long-term data and published information. The abundance, biomass and species composition of zooplankton greatly decreased after the ctenophore Mnemiopsis leidyi invasion due to predation by M. leidyi. Specifically, the abundance of O. dioica declined at that period. But with increasing numbers of a new invader, the ctenophore Beroe ovata, a predator of M. leidyi, in 1999, the zooplankton community began to recover. The population density of Oikopleura dioica also gradually increased to a level that was within the range of its abundance before the M. leidyi outbreak and even higher due to increasing its prey bacteria, which was provoked by the mucus released by B. ovata.

scholarly journals The sea water temperature impact upon Gonothyraea loveni (Allman) hydroid development on the artificial substrates in the Sevastopol Bay (the Black Sea)

2019 ◽  
Author(s):  
Keyword(s):  
Water Temperature ◽  
Black Sea ◽  
Sea Water ◽  
Seawater Temperature ◽  
Artificial Substrates ◽  
Effect Of Temperature ◽  
The Black Sea ◽  
Temperature Range ◽  
Wide Range ◽  
Sevastopol Bay

The effect of seawater temperature on the subsidence and development of the Gonothyraea loveni (Allman) hydroid at a specific point in the water area was discussed This allows us to trace the connection of seasonal changes in sea temperature with the process of sedimentation of planules and the development of hydroid G. loveni on artificial substrates of various exposures in the Sevastopol bay. Observations were carried out over two periods: from 1979 to 1987. and from 2011 to 2015. The temperature range of 5-10 °C corresponds to the subsidence of planul on plates with a community 10 days aged in the autumn and spring periods. The peak of subsidence was detected at a water temperature of 9 °C. At this time, the greatest number of plates with settled hydroids was detected (22%). The number of hydrotecas in the temperature range of 11-19 °C reaches maximum values due to sedimentation and active growth of colonies, since the frequency of occurrence of plates with hydroids during this period is halved and remains at this level at higher temperatures (17-24 °C). With an increase in the exposure of substrates up to 30 days, the bulk of the plates with hydroid (80%) are concentrated in the temperature range of 6–11 °C. When the temperature of water in the sea is 16-24 °C, plates with hydroids are less than 5%, which is determined in addition to the effect of temperature by the massive subsidence of Botryllys schlosseri (Pallas), which replaces the hydroid. In communities of 2-12 months of age, the hydroid G. loveni develops over a wide range of temperatures, from 5 to 23 °C. Dynamic changes in communities show that the growth of colonies occurs at a temperature of 5-9 °C with a maximum intensity of 10 to 15 °C. At temperatures above 17 °C, the reduction of colonies occurs. Key words: subsidence, development of hydroid Gonothyraea loveni, the temperature of the sea water of the Sevastopol Bay, the Black sea

Population development of the invader ctenophore Mnemiopsis leidyi , in the Black Sea and in other seas of the Mediterranean basin

2001 ◽  
Vol 139 (3) ◽  
pp. 431-445 ◽  
Author(s):  
Shiganova T. ◽  
Mirzoyan Z. ◽  
Studenikina E. ◽  
Volovik S. ◽  
Siokou-Frangou I. ◽  
...  
Keyword(s):  
Black Sea ◽  
Mediterranean Basin ◽  
The Black Sea ◽  
Mnemiopsis Leidyi ◽  
Population Development ◽  
The Mediterranean ◽  
The Mediterranean Basin
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