Abstract
The phytoplankton of a surface strongly desalinated water lens was investigated on the basis of materials collected during the 57th cruise of the R/V Akademik Mstislav Keldish in September of 2007. The lens with a salinity of <18 psu had area of approximately 19 thousand square kilometers and was located in the northwestern part of the Kara Sea near the eastern coast of Novaya Zemlya. It was a specific biotope that had been isolated from the surrounding waters for more than three months. In the investigated area, 66 algae species were identified. The maximal species diversity was found in the upper layers of the desalinated lens, where the species number was 1.5 to 3 times higher than in other parts of the water column. The phytoplankton numbers in the upper layers of the lens were 1.5 to 4.5 times higher than in its lower part and generally higher than below the picnocline. Diatoms were the most abundant group in the upper layers of the lens, while flagellates dominated in numbers in the subpicnocline part of the water column. The maximal values of the phytoplankton biomass were observed everywhere in the upper layers of the lens, where they were 1.2 to 3.7 times higher than in the lower part of the lens and 1.3 to 7.2 times higher than in the layer below the picnocline. Dinoflagellates generally gave the most contribution to the total phytoplankton biomass. The phytoplankton of the desalinated surface lens in the northwestern part of the Kara Sea by its composition and quantitative parameters had the nearest resemblance to a phytocenosis that we observed two weeks later at a shallow desalinated shelf closely adjacent to the Ob estuary.
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V. I. Burenkov and A. P. Vasil’kov, “On the Influence of Continental Inflows on the Spatial Distribution of Hydrological Parameters in the Kara Sea,” Okeanologiya 34, No. 5, 652–661 (1994).
N. V. Druzhkov and P. R. Makarevich, in Ecosystems of Sea Pelagials in the Western Antarctic (Kola Sci. Center, Apatity, 1996), pp. 37–72.
A. G. Zatsepin, P. O. Zav’yalov, V. V. Kremenetskii, et al., “Freshwater Layer at the Surface of the Kara Sea,” Okeanologiya 50, No. 5, 698–708 (2010).
A. G. Zatsepin, E. G. Morozov, and V. T. Paka, “Water Circulation in the Southwestern Kara Sea in September of 2007,” Okeanologiya 50, No. 5, 683–697 (2010).
I. A. Kiselev, Plankton of the Sea and Continental Reservoirs (Nauka, Leningrad, 1969) [in Russian].
P. R. Makarevich, in Plankton of the Seas in the Western Arctic (Kola Sci. Center, Apatity, 1997), pp. 51–65.
P. N. Makkaveev, P. A. Stunzhas, Z. G. Mel’nikova, et al., “Hydrochemical Characteristic of Waters in the Western Kara Sea,” Okeanologiya 50, No. 5, 730–739 (2010).
P. N. Makkaveev, P. A. Stunzhas, and P. V. Khlebopashev, “On Selection of Waters from Ob’ and Yenisei Rivers in Freshwater Lenses of the Kara Sea in 1993 and 2007,” Okeanologiya 50, No. 5, 740–747 (2010).
V. N. Moretskii, “Distribution and Dynamics of Fresh Waters of the Kara Sea,” Trudy AANII 389, 33–35 (1985).
S. A. Mosharov, “Distribution of Primary Production and Chlorophyll a in the Kara Sea in September of 2007,” Okeanologiya 50, No. 6, 933–941 (2010).
S. V. Pivovarov, Chemical Oceanography of the Arctic Seas of Russia (Gidrometeoizdat, St. Petersburg, 2000) [in Russian].
V. P. Rusanov and A. N. Vasil’ev, “Distribution of River Waters in the Kara Sea Determined Using the Data of Hydrochemical Analysis,” Trudy AANII 323, 188–196 (1976).
P. A. Stunzhas, “Separation of the Enisei and Ob’ Waters in the Kara Sea According to Alkalinity Level and Silicon Concentration,” Okeanologiya 35, No. 2, 215–219 (1995).
I. N. Sukhanova, in Contemporary Methods for Quantitative Assessment of Marine Plankton Distribution (Nauka, Moscow, 1983), pp. 97–105.
I. N. Sukhanova, M. V. Flint, and V. M. Sergeeva, “Structure of Phytoplankton Communities and Primary Production in the Ob’ Estuary and Adjacent Kara Shelf,” Okeanologiya 50, No. 5, 785–800 (2010).
I. N. Sukhanova, M. V. Flint, V. M. Sergeeva, and V. V. Kremenetskii, “Phytoplankton of the Southwestern Kara Sea,” Okeanologiya 51, No. 6, 1039–1053 (2011).
H. Deubel, M. Engel, I. Fetzer, et al., in Siberian River Run-Off in the Kara Sea, Ed. by R. Stain, et al. (Elsevier, Amsterdam, 2003), pp. 237–265.
M. V. Flint, A. V. Drits, M. V. Emelianov, et al., Investigations of the Pribilof Marine Ecosystem, Third Year: Significance of Oceanographic and Biological Processes at the Shelf Break, Outer Shelf Domain and Middle Shelf Front for Biological Productivity of the Pribilof Region. Project Report (Inst. Oceanol., Moscow, 1996) [in Russian].
I. H. Harms and M. J. Karcher, “Kara Sea Freshwater Dispersion and Export in the Late 1990s,” J. Geophys. Res. 104, No. C6, 13431–13448 (2005).
P. R. Makarevich, N. V. Druzhkov, V. V. Larionov, and E. I. Druzhkova, “The Freshwater Phytoplankton Biomass and Its Role in the Formation of a Highly Productive Zone on the Ob-Yenisei Shallows (Southern Kara Sea),” Proc. Mar. Sci. 6, 185–195 (2003).
S. Menden-Deuer and E. J. Lessard, “Carbon to Volume Relationships for Dinoflagellates, Diatoms and Other Protist Plankton,” Limnol. Oceanogr. 45, No. 3, 569–579 (2000).
E. M. Nothig, Y. Okolodkov, V. V. Larionov, and E. I. Druzhkova, in Siberian River Run-Off in the Kara Sea, Ed. by R. Stain, et al. (Elsevier, Amsterdam, 2003), pp. 163–185.
S. Pivovarov, R. Schlitzer, and A. Novikhin, in Siberian River Run-Off in the Kara Sea, Ed. by R. Stain, et al. (Elsevier, Amsterdam, 2003), pp. 9–25.
R. R. Strathmann, “Estimating the Organic Carbon Content of Pphytoplankton from Cell Volume, Cell Area or Plasma Volume,” Limnol. Oceanogr. 12, No. 3, 411–418 (1967).
I. N. Sukhanova, H. I. Semina, and V. V. Venttsel, in Dynamics of the Bering Sea, Ed. by R. Loughlin (PICES, Alaska, 1999), pp. 453–483.
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Original Russian Text © I.N. Sukhanova, M.V. Flint, V.M. Sergeeva, 2012, published in Okeanologiya, 2012, Vol. 52, No. 5, pp. 688–699.
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Sukhanova, I.N., Flint, M.V. & Sergeeva, V.M. Phytoplankton of the surface desalted lens of the Kara Sea. Oceanology 52, 635–645 (2012). https://doi.org/10.1134/S0001437012050165
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DOI: https://doi.org/10.1134/S0001437012050165