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S. V. Gladyshev V. S. Gladyshev L. A. Pautova S. K. Gulev N. V. Politova A. V. Sokov 《Doklady Earth Sciences》2018,481(2):1025-1028
This paper shows the important role that circulation can play in the long-term variability of thermohaline properties of the bottom layer in the Irminger Sea, and the increase in salinity in the 21st century in spite of intense ice melting in the Arctic and freshening of the upper and intermediate layers that started over the last 5–7 years in the North Atlantic. 相似文献
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D. I. Glukhovets O. V. Kopelevich I. V. Sahling V. A. Artemiev L. A. Pautova E. K. Lange M. D. Kravchishina 《Oceanology》2017,57(3):410-418
The article presents the results of shipboard and satellite measurements in the surface layer of the Baltic, Norwegian, and Barents seas during legs from the Baltic to the White Sea in June–August 2014–2016. Special attention is paid to marine phytoplankton blooms of cyanobacteria in the Baltic Sea and coccolithophores in the Barents Sea. No blooms were found in the Norwegian Sea. The efficiency of combined application of in situ and satellite optical methods for studying the parameters of phytoplankton blooms is shown. 相似文献
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L. A. Pautova M. D. Kravchishina V. A. Silkin A. P. Lisitzin 《Doklady Earth Sciences》2017,474(2):657-661
This work presents the first data on the occurrence of the invasive, potentially toxic dinoflagellate Gonyaulax polygramma in the composition of plankton phytocenoses in the Caspian Sea. It was revealed that G. polygramma plays the key role in the quantitative characteristics of summer plankton phytocenoses and its bloom during the summer seasons of 2010 and 2013 was comparable in biomass (15–16 g/m3) to a “red tide.” In addition, the correlation between the G. polygramma bloom and the wind upwelling system in the eastern mid-Caspian region was established. For the first time, it is suggested that “bloom” of G. polygramma can also occur in deep-water halistatic areas (Derbent depression), remote from the upwelling system. 相似文献
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It is shown that, in 2002–2005, the mass development of the coccolithofore Emiliania huxleyi on the Gelendzhik shelf occurred annually and in May–June its abundance reached 1.5 × 106 cells/l. In 2004–2005, the bloom of E. huxleyi was accompanied by a mass development of the diatom alga Chaetoceros subtilis var. abnormis f. simplex (0.6–0.9 × 106 cells/l); for the first time, it was registered as a dominating form of the Black Sea phytoplankton. Small flagellates and picoplankton algae played a noticeable role in the phytoplankton throughout the entire period of the studies. Meanwhile, in the early summer period, the bulk of the biomass consisted of coccolithophores (50–60%), while, in the late summer period, diatomaceous algae dominated (50–70%). Among the ecological factors that favor the coccolithophore development one may note the microstratification of the upper mixed layer at a high illumination level and high temperature in the surface waters (18–21°C). The terrigenous runoff during the rainy period had a negative effect on the E. huxleyi development, while storms dispersed the population over the upper mixed layer. The wind-induced near-shore upwelling stimulated the development of diatoms. 相似文献
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Yu. S. Dolotov N. N. Filatov V. P. Shevchenko N. N. Nemova N. A. Rimskii-Korsakov N. V. Denisenko I. P. Kutcheva P. M. Boyarinov M. P. Petrov V. Kh. Lifshitz A. V. Platonov L. L. Demina V. I. Kukharev V. N. Kovalenko R. E. Zdorovennov T. N. Rat'kova O. M. Sergeeva A. N. Novigatskii L. A. Pautova K. V. Filipieva E.-M. Nothig C. Loronzen 《Water Resources》2005,32(6):611-628
In September 2000, July 2001, and August 2002, three marine expeditions onboard the R/V Ekolog were carried out to study physical, chemical, geological, and biological processes in two estuaries of Karelian coast of the White Sea. A wide complex of modern methods of marine field work was used. The most recent biochemical studies on the estimation of mechanisms of adaptive reactions of hydrobionts to environmental factors (including anthropogenic) were used. 相似文献
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Pautova L. A. Silkin V. A. Kravchishina M. D. Yakubenko V. G. Kudryavtseva E. A. Klyuvitkin A. A. Lobkovsky L. I. 《Doklady Earth Sciences》2021,499(1):590-594
Doklady Earth Sciences - Unique data were obtained on the abnormally high level of phytoplankton biomass (30 g m–3) in the marginal ice zone of the deep-water High Arctic (the Nansen Basin,... 相似文献
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M. D. Kravchishina A. A. Klyuvitkin L. A. Pautova N. V. Politova A. Yu. Lein 《Oceanology》2018,58(1):45-56
The data on the isotopic composition of particulate organic carbon (δ13CPOC) in the Caspian Sea water in summer–autumn 2008, 2010, 2012, and 2013 are discussed in the paper. These data allowed as to reveal the predominant genesis of organic carbon in suspended particulate matter of the active seawater layer (from 0 to 40 m). The δ13CPOC =–27‰ (PDB) and δ13CPOC =–20.5‰ (PDB) values were taken as the reference data for terrigenous and planktonogenic organic matter, respectively. Seasonal (early summer, late summer, and autumn) variations in the composition of suspended particulate matter in the active sea layer were revealed. A shift of δ13CPOC towards greater values was seen in autumn (with a slight outburst in the development (bloom) of phytoplankton) in comparison with summer (with large accumulations and an extraordinary phytoplankton bloom confined to the thermocline area). The seasonal dynamics of autochthonous and allochthonous components in the suspended particulate matter of the Middle and Southern Caspian Sea was studied with the use of data on the concentration of particulate matter and chlorophyll a, the phytoplankton biomass and the POC content. 相似文献