Environmental changes in the Amur Bay (Japan/East Sea) during the last 150 years revealed by examination of diatoms and silicoflagellates     

Tsoy  Ira  Prushkovskaya  Irina  Aksentov  Kirill  Astakhov  Anatoly 《Ocean Science Journal》2015,50(2):433-444

Siliceous unicellular microalgae — diatoms and silicoflagellates from sediments in Amur Bay were analyzed with high temporal resolution to examine changes over the last 150 years. The age of sediments was estimated from unsupported ²¹⁰Pb controlled by ¹³⁷Cs. Siliceous microalgae examined in each cm of two sediment cores demonstrated significant changes in the ecological structure of the assemblages that reflected changes in sedimentation conditions. During the years 1860–1910 the sediments accumulated under the great influence of river runoff. For about the next 50 years the number of freshwater species and marine benthic diatoms in sediments sharply declined, which is probably connected with the weakening of the effects of river runoff due to deforestation. Since the early 1960s the sedimentation conditions in the Amur Bay changed significantly. Marine planktonic diatoms and silicoflagellates began to prevail in sediments and this reflects increasing microphytoplankton productivity. One consequence of this was the formation of seasonal bottom hypoxia in Amur Bay. The ecological structure of diatom and silicoflagellate assemblages indicates that the sea level began to rise since the early 1960s and this corresponds to the water and air temperature increase in the area for that period. The obtained data suggest that the environmental changes over the last 150 years in Armur Bay are associated with the weakening of river runoff due to deforestation, sea level rise caused by global warming, and the increase of siliceous microplankton productivity that resulted in the formation of seasonal bottom hypoxia.

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Study of the State and Variability of Marine Environment in the Japan/East Sea in Cruise 58 of the R/V Akademik Oparin     

Lobanov  V. B.  Sergeev  A. F.  Kim  G.  Nam  S.  Maryina  E. N.  Han  H.  Popov  O. S.  Tishchenko  P. P.  Vlasova  G. A.  Zverev  S. A.  Choi  S. J.  Jeong  H.  Kim  B.  Kim  Y.  Kim  S. Y.  Lee  I.  Lee  H.  Lee  H.  Leusov  A. E.  Mariaysh  A. A.  Prushkovskaya  I. A.  Rudykh  Y. N.  Ryu  Y.  Ryumina  A. A.  Sagalaev  S. G.  Semkin  P. Y.  Seo  H.  Shkirnikova  E. M.  Shlyk  N. V.  Shvetsova  M. G.  Tsoi  V.  Ulanova  O. A. 《Oceanology》2021,61(4):586-588

Oceanology - Multiyear monitoring of the marine environment of the Japan/East Sea was continued by the joint Korean–Russian expedition of the R/V Akademik Oparin (cruise 58) in...  相似文献   

Study of the State and Variability of the Northwestern Japan Sea in the Autumn–Winter Period on Cruise 62 of the R/V Akademik Oparin     

Lobanov  V. B.  Sergeev  A. F.  Maryina  E. N.  Prushkovskaya  I. A.  Tishchenko  P. Y.  Kalinchuk  V. V.  Koltunov  A. M.  Makseev  D. S.  Sagalaev  S. G.  Yurikova  D. A.  Akulova  E. A.  Aparina  K. A.  Zagoruyko  O. I.  Zverev  S. A.  Kraynikov  G. A.  Kukla  S. P.  Leusov  A. E.  Lukyanova  N. B.  Ryumina  A. A.  Semkin  P. Y.  Shvetsova  M. G.  Shkirnikova  E. M.  Yurikova  E. A.  Yurtsev  A. Y.  Yakimov  T. S. 《Oceanology》2021,61(5):742-744

Oceanology - The results of research carried out on cruise 62 of the R/V Akademik Oparin from December 14 to 29, 2020 continued monitoring of the interannual variability of the Japan Sea water...  相似文献   

First Data on Modern Sedimentation Rates in the Southern Part of the Tatar Strait of the Sea of Japan     

Aksentov  K. I.  Melgunov  M. S.  Alatortsev  A. V.  Shi  Xuefa  Zou  Jianjun  Prushkovskaya  I. A.  Bosin  A. A.  Sattarova  V. V. 《Doklady Earth Sciences》2023,507(3):S414-S417

Doklady Earth Sciences - The study of natural archives, such as bottom sediments of lakes and seas, is promising for paleoreconstructions due to rapid environmental changes, human impacts, and...  相似文献