Mineralogical and geochemical indicators of anoxic sedimentation conditions in local depressions within the Sea of Okhotsk in the late Pleistocene-Holocene

2007 ◽  
Vol 1 (3) ◽  
pp. 203-229 ◽  
Author(s):  
A. N. Derkachev ◽  
N. A. Nikolaeva ◽  
A. V. Mozherovsky ◽  
T. N. Grigor’eva ◽  
E. D. Ivanova ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Sea Of Okhotsk ◽  
The Sea Of Okhotsk ◽  
Geochemical Indicators ◽  
Sedimentation Conditions

Late Pleistocene/Holocene radiolarian and pollen records from sediments in the Sea of Okhotsk

1991 ◽  
Vol 6 (1) ◽  
pp. 121-131 ◽  
Author(s):  
Joseph J. Morley ◽  
Linda E. Heusser ◽  
Nicholas J. Shackleton
Keyword(s):  
Late Pleistocene ◽  
Sea Of Okhotsk ◽  
The Sea Of Okhotsk ◽  
Pollen Records

Identification of Density-Stratified Waters in the Late-Pleistocene North Atlantic: A faunal Derivation

1983 ◽  
Vol 20 (3) ◽  
pp. 374-386 ◽  
Author(s):  
Joseph J. Morley
Keyword(s):  
Late Pleistocene ◽  
North Atlantic ◽  
Sea Of Okhotsk ◽  
Species Abundance ◽  
High Abundance ◽  
Northwest Pacific ◽  
The Sea Of Okhotsk ◽  
The North ◽  
The North Atlantic ◽  
Subsurface Temperatures

An expanded study of the radiolarian Cycladophora davisiana in late-Pleistocene North Atlantic marine sediments shows that over the last several hundred thousand years this species exhibits large variations in relative abundance. The C. davisiana curves in the North Atlantic cores are quite similar, with easily recognizable features common to all records. Minor deviations from the general pattern of this species' abundance apparently reflect the response of C. davisiana to specific oceanographic conditions characteristic of a particular area within the North Atlantic. C. davisiana occurs today in high abundance (>20%) only in the Sea of Okhotsk. Extensive winter and early spring sea-ice cover coupled with low surface-water salinities during summer and fall is responsible for maintaining near-freezing subsurface temperatures in this northwest Pacific marginal sea as well as relatively stable temperatures and salinities at depths below a shallow subsurface temperature minimum. During periods in the late Pleistocene, high C. davisiana abundances (>20%) in the North Atlantic were probably associated with oceanographic properties similar to those that exist in the Sea of Okhotsk today. Because of the relationship between relatively stable subsurface temperatures and salinities and high abundance levels of C. davisiana, analysis of this species' abundance pattern at several locations throughout the high-latitude North Atlantic should assist in identifying source areas of deep-water formation and determining the duration of deep convective processes at these sites.

Regionalized primary paleoproduction variability in the sea of Okhotsk during late Pleistocene and Holocene

2015 ◽  
Vol 114 ◽  
pp. 534-540 ◽  
Author(s):  
Aleksandr Bosin ◽  
Sergey Gorbarenko ◽  
Shi Xuefa ◽  
Yanguang Liu ◽  
Jianjun Zou
Keyword(s):  
Late Pleistocene ◽  
Sea Of Okhotsk ◽  
The Sea Of Okhotsk

Foraminifers in late Pleistocene-Holocene sediments of the Deryugin Basin of the Sea of Okhotsk

Oceanology ◽  
2009 ◽  
Vol 49 (5) ◽  
pp. 707-717
Author(s):  
T. A. Khusid ◽  
N. V. Belyaeva ◽  
M. P. Chekhovskaya ◽  
A. G. Matul
Keyword(s):  
Late Pleistocene ◽  
Sea Of Okhotsk ◽  
Deryugin Basin ◽  
The Sea Of Okhotsk ◽  
Holocene Sediments

Contribution to the flora of marine algae of the coastal zone of the northeastern part of the Sea of Okhotsk

2018 ◽  
Vol 52 (1) ◽  
pp. 63-73
Author(s):  
N. V. Evseeva
Keyword(s):  
Coastal Zone ◽  
Sea Of Okhotsk ◽  
Marine Algae ◽  
Herbarium Material ◽  
Northeastern Part ◽  
The Sea Of Okhotsk ◽  
The Family ◽  
First Time

The revision of the herbarium material, collected in the northern part of the Sea of Okhotsk in 1965–1966 and stored in VNIRO, allowed to expand the taxonomic list of macrophyte algae of the coastal zone of this area. The locations of discovery of 24 previously unmentioned species are described. Myrionema balticum, Ulvella repens, Syncoryne reinkei, Acrochaetium arcuatum were found in the Sea of Okhotsk for the first time. Most species new for the Sea of Okhotsk is represented by epiphytes of the family Ulvellaceae (Chlorophyta). The final taxonomic list of this region, including literature data, consists of 169 species.

CARBONATE DISSOLUTION AND ULTRASTRUCTURAL BREAKDOWN IN PLANKTONIC FORAMINIFERA IN THE SEA OF OKHOTSK

2017 ◽  
Author(s):  
Alexandra Romanova ◽  
Alexandra Romanova ◽  
Vladimir Anin ◽  
Vladimir Anin ◽  
Sergey Pletnev ◽  
...  
Keyword(s):  
Sea Of Okhotsk ◽  
Planktonic Foraminifera ◽  
Carbonate Dissolution ◽  
Calcite Dissolution ◽  
The Sea Of Okhotsk ◽  
Globigerina Bulloides ◽  
Neogloboquadrina Pachyderma ◽  
Thin Walled ◽  
Shell Fragments ◽  
Degree Of Fragmentation

80 sediment stations collected along the meridian transect across the Sea of Okhotsk were studied in order to reveal patterns of dissolution based on planktonic foraminifera. The degree of calcite dissolution intensity from planktonic foraminifera determined by different indices (degree of fragmentation, presence of susceptible to dissolution species, benthos/ plankton ratio). The highest degree of dissolution evidenced by a large number of shell fragments and corroding walls were found in sediments from the area of the Kuril Islands. The most revealing measure of probable dissolution of foraminiferal shells in the central part of the sea is a low number and lack of thin-walled species. The effects of dissolution on foraminiferal shells were studied for dominated species Neogloboquadrina pachyderma sin and Globigerina bulloides using a scanning electron microscope. The results are important for understanding processes of sedimentation, the paleo-oceanologial reconstructions and for obtaining reliable results in isotope analyzes.

Decapodid stage of Neocrangon communis (Decapoda, Crangonidae) from the eastern part of the Sea of Okhotsk

2016 ◽  
Vol 25 (1) ◽  
pp. 13-22
Author(s):  
N.A. Sedova ◽  
S.S. Grigoriev
Keyword(s):  
Sea Of Okhotsk ◽  
General View ◽  
Characteristic Shape ◽  
The Sea Of Okhotsk ◽  
First Time ◽  
Distinguishing Features

For the first time the morphology of the decapodid stage of Neocrangon communis is described in detail. The decapodid can be distinguished from those of the genera Argis, Crangon, and Mesocrangon by the morphology of their telson, antennae, antennulae, and carapace. The main distinguishing features of the decapodid of N. communis were two spines on medial line of the carapace, a short rostrum, relatively wide scaphocerite, characteristic shape and length of the terminal setae on the telson. Drawings of general view and some limbs are presented.

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