排序方式： 共有53条查询结果，搜索用时 15 毫秒
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I.?I.?Rusanov A.?Yu.?LeinEmail author P.?N.?Makkaveev A.?A.?Klyuvitkin M.?D.?Kravchishina M.?V.?Ivanov M.?V.?Flint 《Oceanology》2018,58(1):57-70
Integrated studies on the hydrochemistry and water column rates of microbial processes in the eastern sector of the Black Sea along a standard 100-miles transect off Gelendzhik from the coast to the central part of the sea at water depths of 100–2170 m show that a series of warm winters and the absence of intense convective winter mixing resulted in a relatively low content of suspended particulate matter (SPM), particulate organic carbon (POC), and nutrients in the water column in March 2009. The relatively high SPM concentrations and the presence of isotopically light POC at the offshore station are indicative of the supply of terrigenous material from land and low contributions of phytoplanktonic organic matter to the composition of SPM. This may explain the low rates of biogeochemical processes in the water column near the coast. The surface layer at deep-water stations is dominated by isotopically heavy phytoplanktonic organic matter. This suggests that the supply of terrigenous material from land was insufficient in offshore deep-water areas. Therefore, warm winters and insufficient nutrient supply do not prevent photosynthesis in the photic layer of the deep-water zone, which generates organic substrates for heterotrophic aquatic communities. The results of isotopic analysis of POC, measurements of the rates biogeochemical processes, and the hydrochemical characteristics of the water column can be used to determine the nature and seasonal variability of the POC composition. 相似文献
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Klyuvitkin A. A. Kravchishina M. D. Dara O. M. Rusanov I. I. Lisitzin A. P. 《Doklady Earth Sciences》2018,483(2):1558-1563
Doklady Earth Sciences - The main aim of this work is to obtain new data on the seasonal variability of the vertical flux of sedimentary matter, its composition, and its transformation during... 相似文献
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Kravchishina M. D. Klyuvitkin A. A. Volodin V. D. Glukhovets D. I. Dubinina E. O. Kruglinskii I. A. Kudryavtseva E. A. Matul A. G. Novichkova E. A. Politova N. V. Savvichev A. S. Silkin V. A. Starodymova D. P. 《Oceanology》2022,62(4):572-574
Oceanology - Research regarding the conditions and processes of paleo- and modern sedimentation with an assessment of particles and pollution fluxes, with determination of the rates of... 相似文献
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N. V. Politova A. A. Klyuvitkin A. N. Novigatskii N. V. Ul’yanova A. L. Chul’tsova M. D. Kravchishina G. A. Pavlova A. Yu. Lein 《Oceanology》2016,56(5):702-713
Investigations in the water column and bottom sediments including entrapped water were carried out on expeditions of the P.P. Shirshov Institute of Oceanology in the Dvina Bay, the White Sea. We studied the transformation of particulate organic matter at the biogeochemical barrier between the water and bottom and in the underlying Holocene sediments. Low rates of the early diagenesis of sediments caused by low values of primary production in the conditions of high fluxes of terrigenous organic matter were established. The low temperatures of microorganisms habitat play the secondary role. 相似文献
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A simple construction of the MSL-110 sediment trap developed at the Laboratory of Physical-Geological Research of the Shirshov
Institute of Oceanology, Russian Academy of Sciences, is presented. The trap is easily assembled from standard parts available
at stores. The trap is easy to use, reliable, and inexpensive. It is applied for determination of sedimentary matter fluxes
and their components in water columns of seas, lakes, and other water reservoirs. 相似文献
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M. D. Kravchishina A. N. Novigatskii N. V. Politova V. V. Zernova S. A. Mosharov O. M. Dara A. A. Klyuvitkin 《Water Resources》2013,40(2):143-156
Multidisciplinary studies of the dispersed sedimentary matter (suspended particulate matter) were carried out in the Volga delta during spring flood in two areas of the Astrakhan State Biosphere Reserve (Obzhorovskii and Damchikskii), allowing the authors to reveal some regularities in sedimentation conditions. Considerable differences were found to exist in the supply of sedimentary material into the sea through the branches and arms of the eastern and western parts of the river delta. Typical of the eastern part are appreciably higher concentrations of suspended particulate matter, biogenic components, and phytopigments, as well as greater phytoplankton abundance and biomass, and sedimentary material fluxes. A relationship was found to exist between the concentration of suspended particulate matter and the phytopigments under consideration. In May, almost entire chlorophyll “a” in suspended particulate matter was concentrated in the cells of small diatom algae, where it was distributed in proportion to diatom biomass. Overall, the suspended matter of the delta is mostly represented by mineral detrital particles (quartz and carbonates) with a relatively small share of clay materials against the background of a huge amount of diatom cells and biogenic detritus. 相似文献
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Novigatsky A. N. Lisitzin A. P. Klyuvitkin A. A. Shevchenko V. P. Kravchishina M. D. Politova N. V. 《Doklady Earth Sciences》2018,479(1):384-389
Doklady Earth Sciences - Based on long-term studies of a small sea in the Arctic Ocean, new regularities in the sedimentary process under the conditions of Arctic sedimentogenesis were established.... 相似文献