Ecological Condition of Diatoms Flora in Holocene Sediments of Razdolnaya River (Far East of Russia)

2013 ◽  
Vol 726-731 ◽  
pp. 1475-1478
Author(s):  
Ekaterina Elbakidze
Keyword(s):  
Far East ◽  
Japan Sea ◽  
Ecological Condition ◽  
River Valley ◽  
Far East Of Russia ◽  
River Terrace ◽  
Southern Primorye ◽  
Holocene Climatic Optimum ◽  
The Japan Sea ◽  
Holocene Sediments

The ecological structure of diatoms communities was researched from sediments of the First Razdolnaya river terrace (Southern Primorye). The obtained data allowed to establish climatic rhythmics and the related transgression-regression cycles, are typical for the area of researches. The analysis of the replacement lagoon-marine diatoms complexes by lacustrine, alluvial and marsh ones allow us to establish the amplitudes of the Japan Sea fluctuations and ingression penetration into river valley. The maximum of the ingression penetration (up to 23 km from sea-shore) toward river-valley corresponds to Holocene climatic optimum. The sea level could exceed modern on +3m at this time and influenced on the coastline formation.

scholarly journals CURRENT DATA ON COMPOSITION AND DISTRIBUTION OF TRAWL MACROZOOBENTHOS IN THE RUSSIAN WATERS OF THE JAPAN SEA

2018 ◽  
Vol 193 ◽  
pp. 33-49 ◽  
Author(s):  
N. V. Kolpakov ◽  
I. A. Korneichuk ◽  
V. A. Nadtochy
Keyword(s):  
Peter The Great Bay ◽  
Japan Sea ◽  
Snow Crab ◽  
Total Biomass ◽  
Trawl Survey ◽  
Depth Range ◽  
Sea Stars ◽  
Southern Primorye ◽  
The Japan Sea ◽  
Average Biomass

The bottom trawl survey (430 stations) was conducted over the shelf and continental slope in the Russian sector of the Japan Sea (total depth range 10–750 m) on April 1 — July 8, 2015. In total, 211 taxa of invertebrates were recorded in the trawl catches. Most of them belonged to sea stars (36), shrimps (32), gastropods (27), bivalves (23), crabs and craboids (11), polychaetes (11), coral polyps (10), and sponges (10). The total biomass of macrozoobenthos in the surveyed area was assessed as 1572.5 . 103 t (136.6 . 103 t in Peter the Great Bay, 341.5 . 103 t at southern Primorye, 686.0 . 103 t at northern Primorye, and 408.4 . 103 t at western Sakhalin) that was higher than the mean long-term level. The total stock of commercial invertebrates was assessed as 630.0 . 103 t. Its highest portion (265.2 . 103 t or 42.1 %) was concentrated in the western Tatar Strait. The average biomass of macrozoobenthos was 13.5 ± 1.1 g/m2 , including 6.3 ± 0.5 g/m2 of commercial species. The most abundant groups were basket stars (372.2 . 103 t), crabs (231.6 . 103 t), shrimp (226.9 . 103 t), sponges (182.9 . 103 t), sea lilies (167.5 . 103 t), sea stars (77.2 . 103 t), sea urchins (59.0 . 103 t), craboids (48.7 . 103 t), and bivalves (49.5 . 103 t). Vertical distribution of both total and commercial benthos was distinguished by peaks on the upper shelf (10–50 m) and upper slope (300–400 m). Over the surveyed northern Japan Sea waters, 18 biocoenotic complexes of trawl macrozoobenthos were identified. The largest area was occupied by the complex of immobile sestonophagous sea lily Heliometra glacialis (131 stations in the depth range of 104–692 m with average biomass 5.5 g/m2 ), other wide-spread complexes were those of polyphagous snow crab Chionoecetes opilio (71 stations, 27–552 m, 4.4 g/m2 ), mobile sestonophagous basket star Gorgonocephalus eucnemis (40 stations, 58–372 m, 6.6 g/m2 ), and polyphagous fawn sea urchin Strongylocentrotus pallidus (40 stations, 17–351 m, 4.7 g/m2 ).

A new species of the genus Birisia (Dicksoniaceae) from the lower–middle Albian deposits of Southern Primorye, Far East of Russia

Palaeobotany ◽  
2020 ◽  
Vol 11 ◽  
pp. 74-95
Author(s):  
L. B. Golovneva ◽  
A. A. Grabovskiy ◽  
A. A. Zolina
Keyword(s):  
Far East ◽  
Western Canada ◽  
Far East Of Russia ◽  
River Channels ◽  
New Siberian Islands ◽  
Type Specimens ◽  
Southern Primorye ◽  
Widespread Species ◽  
North East ◽  
A New Species

A new fern Birisia mandshurica, sp. nov. (Dicksoniaceae) from the lower–middle Albian Frentsevka Formation of southern Primorye, Far East of Russia is described. This species is characterized by short-creeping rhizomes with closely spaced stipes and bipinnate fronds with narrow linear pinnules. A reconstruction of B. mandshurica is proposed. It comes from the autochthonous locality of ferns and herbaceous angiosperms and was a part of pioneer open community, which occupied low flat plains between river channels. Revision of ferns, described as Acanthopteris gothanii Sze from China, shows, that these ferns belongs to Birisia alata (Prynada) Samylina. The name Acanthopteris Sze should be abandoned, due to absence of spore-bearing pinnules and poor preservation of sterile pinnules in type specimens. Based on Chinese and Russian material of good preservation, we provide emended diagnoses of the genus Birisia Samylina and its type species B. alata. Re-examination of various species of the genus Birisia revealed that this genus was widely distributed in the Cretaceous floras (from the Barremian to the Coniacian) of Eastern Siberia, New Siberian Islands, North-East and Far East of Russia, China, Japan, Alaska and Western Canada. B. alata is the most widespread species.

scholarly journals On measurements of aerosol-gas composition of the atmosphere during two expeditions in 2013 along the Northern Sea Route

2015 ◽  
Vol 15 (21) ◽  
pp. 12413-12443 ◽  
Author(s):  
S. M. Sakerin ◽  
A. A. Bobrikov ◽  
O. A. Bukin ◽  
L. P. Golobokova ◽  
Vas. V. Pol'kin ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Black Carbon ◽  
Far East ◽  
Japan Sea ◽  
Water Soluble ◽  
The Arctic ◽  
Layer Height ◽  
Boundary Layer Height ◽  
The Japan Sea ◽  
Carbon Mass

Abstract. We presented the results of expedition measurements of the set of physical-chemical characteristics of atmospheric aerosol in areas of the Arctic and Far East seas, performed onboard RV Akademik Fedorov (17 August–22 September 2013) and RV Professor Khljustin (24 July–7 September 2013). The specific features of spatial distribution and time variations of aerosol optical depth (AOD) of the atmosphere in the wavelength range of 0.34–2.14 μm and boundary layer height, aerosol and black carbon mass concentrations, and disperse and chemical composition of aerosol are discussed. Over the Arctic Ocean (on the route of RV Akademik Fedorov) there is a decrease in aerosol and black carbon concentrations in a northeastern direction: higher values were observed in the region of Spitsbergen and near the Kola Peninsula; and minimum values were observed at northern margins of the Laptev Sea. Average AOD (0.5 μm) values in this remote region were 0.03; the aerosol and black carbon mass concentrations were 875 and 22 ng m−3, respectively. The spatial distributions of most aerosol characteristics over Far East seas show their latitudinal decrease in the northern direction. On transit of RV Professor Khljustin from the Japan Sea to the Chukchi Sea, the aerosol number concentration decreased on average from 23.7 to 2.5 cm−3, the black carbon mass concentration decreased from 150 to 50 ng m−3, and AOD decreased from 0.19 to 0.03. We analyzed the variations in the boundary layer height, measured by ship-based lidar: the average value was 520 m, and the maximal value was 1200 m. In latitudinal distribution of the boundary layer height, there is a characteristic minimum at a latitude of ~ 55° N. For water basins of eight seas, we present the chemical compositions of the water-soluble aerosol fraction (ions, elements) and small gas-phase species, as well as estimates of their vertical fluxes. It is shown that substances are mainly (75–89 %) supplied from the atmosphere to the sea surface together with gas-phase species. The deposited ions account for from 11 to 24.5 %, and trace elements account for 0.2–0.4 % of the total sum of water-soluble components. The average vertical fluxes of aerosol substance are a factor of 4–7 larger in the Japan Sea than in the water basins of Arctic seas.

scholarly journals Geochemical Analysis as a Complementary Tool to Estimate the Uplift of Sediments Caused by Shallow Gas Hydrates in Mounds at the Seafloor of Joetsu Basin, Eastern Margin of the Japan Sea

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Antonio Fernando Menezes Freire ◽  
Ryo Matsumoto ◽  
Fumio Akiba
Keyword(s):  
Gas Hydrate ◽  
Japan Sea ◽  
Authigenic Carbonate ◽  
Anaerobic Oxidation Of Methane ◽  
Geochemical Analysis ◽  
Terrestrial Organic Matter ◽  
The Holocene ◽  
Eastern Margin ◽  
The Japan Sea ◽  
Holocene Sediments

The Holocene sediments of the eastern margin of the Japan Sea are characterized by high total organic carbon (TOC) and total nitrogen (TN) contents, low TOC/TN and TS/TOC values with enriched δ13Corg signatures, as a result of high marine productivity during present oxic highstand. On the other hand, the LGM sediments are characterized by low TOC and TN contents, high TOC/TN and TS/TOC values with depleted δ13Corg signatures, characteristic of C3-derived terrestrial organic matter input during that anoxic lowstand. However, at the top of mounds at the seafloor, where gas hydrate and authigenic carbonate nodules occur, the host sediments have a mixture of both Holocene and LGM geochemical signatures. Both gas hydrate and authigenic carbonate, formed by the anaerobic oxidation of methane, increased the sedimentary volume and caused an uplift of older sediments, inducing mound formation. The thickness of the Holocene sediments over mounds is very small or absent exposing the last glacial maximum (LGM) sediments to the seafloor. The uplift of the LGM sediments within mounds is estimated to be >2 m. We conducted geochemical analysis to detect such sediment movement, using samples collected by shallow cores in the Joetsu Basin, eastern margin of the Japan Sea.

scholarly journals An Angiosperm Dominated Herbaceous Community from the Early – Middle Albian of Primorye, Far East of Russia

2018 ◽  
Vol 74 (1-2) ◽  
pp. 165-178 ◽  
Author(s):  
Lina Golovneva ◽  
Pavel Alekseev ◽  
Eugenia Bugdaeva ◽  
Elena Volynets
Keyword(s):  
Far East ◽  
Far East Of Russia ◽  
Southern Primorye ◽  
Plant Fossils ◽  
Flooding Event ◽  
Herbaceous Community ◽  
The Town ◽  
Bearing Layer ◽  
Flooded Areas ◽  
Cretaceous Deposits

An extraordinarily well-preserved autochthonous angiosperm herbaceous community is described from the Lower Cretaceous deposits of the Frentsevka Formation, southern Primorye, Far East of Russia. The locality Bolshoy Kuvshin is situated on the coast of the Ussuri Bay on the Bolshoy Kuvshin Cape near the town of Bolshoy Kamen. The plant-bearing layer was determined to be early - middle Albian in age. The angiosperm assemblage includes six species: Achaenocarpites capitellatus Krassilov et Volynets, Ternaricarpites floribundus Krassilov et Volynets, Jixia pinnatipartita S.X.Guo et G.Sun, Asiatifolium elegans G.Sun, S.X.Guo et Shao L.Zheng and two new undetermined species. The majority of specimens are represented by fragments of branching stems with attached leaves or fruits or by almost complete plants. Two species (Jixia pinnatipartita and Asiatifolium elegans) are also in the angiosperm assemblage from the Chengzihe Formation (eastern Heilongjiang, China). The angiosperm remains are accompanied by the fern Onychiopsis psilotoides which is represented by almost entire young plants. The plant fossils were buried during a single flooding event and remained very close to their original location. They formed a pioneer open herbaceous community, consisting of ferns and angiosperms with a predominance of the latter and adapted to colonize fresh sediments in periodically flooded areas.

K-Ar ages of the basaltic rocks from Far East Russia: Constraints on the tectono-magmatism associated with the Japan Sea opening

Island Arc ◽  
1998 ◽  
Vol 7 (1-2) ◽  
pp. 271-282 ◽  
Author(s):  
Satoshi Okamura ◽  
Yuri A. Martynov ◽  
Katsuhiko Furuyama ◽  
Keisuke Nagao
Keyword(s):  
Far East ◽  
Japan Sea ◽  
Basaltic Rocks ◽  
The Japan Sea ◽  
East Russia

scholarly journals Modern state of bottom and demersal fish resources in the Russian waters of the Japan Sea

2016 ◽  
Vol 184 (1) ◽  
pp. 54-69
Author(s):  
Pavel V. Kalchugin ◽  
Maxim I. Boyko ◽  
Sergey F. Solomatov ◽  
Emilia P. Chernienko
Keyword(s):  
Peter The Great Bay ◽  
Japan Sea ◽  
Demersal Fish ◽  
Southern Primorye ◽  
Bathymetric Distribution ◽  
Peter The Great ◽  
Great Bay ◽  
The Japan Sea ◽  
High Concentrations ◽  
Russian Waters

Results of the bottom trawl survey conducted over the shelf and continental slope in the Russian waters of the Japan Sea from Peter the Great Bay to the Soya Strait in the period from March 31 to July 8, 2015 are presented. Species composition, biomass and spatial and bathymetric distribution of benthic and demersal fish are determined. Bulk of the biomass (> 90 %) was formed by 4 families: gadids, flounders, sculpins, and herrings. The species structure varied considerably by areas: pollock and plain sculpin dominated in Peter the Great Bay, pollock and sealyeye plaice - at southern Primorye beyond the Bay, herring - at northern Primorye, and sealyeye plaice and longsnout flounder - at southwestern Sakhalin. The highest density of distribution was recorded in Peter the Great Bay at the depths 500-700 m - 26.8 t/km², with domination of pollock, the lowest density was at southern Primorye in the depth range of 700-800 m - 2.4 t/km² with domination of sealyeye plaice. Peter the Great Bay was surveyed in conditions of winter distribution of fish distinguished by their high concentrations at the continental slope; their shift towards lower depths was observed at Primorye coast, and almost summer type of bathymetric distribution with the high concentrations on the shelf was found at southwestern Sakhalin. The biomass of benthic and demersal fish has increased slightly in compare with the 1980-1990s.

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