ANALYSIS OF THE ECOSYSTEMS' STATE OF THE BAIKAL LAKE BASIN AS AN EXAMPLE OF RUSSIAN-MONGOLIAN COOPERATION IN THE FIELD OF ECOLOGY

2021 ◽  
Author(s):  
S. N. Bazha ◽  
Ch. Dugarjav ◽  
A. V Andreev ◽  
E. V Danzhalova ◽  
M. Saandar ◽  
...  
Keyword(s):  
Lake Basin ◽  
Baikal Lake

scholarly journals Ice jam flood risks on the rivers of the Baikal Basin

2020 ◽  
Vol 163 ◽  
pp. 02001
Author(s):  
Tatyana Borisova
Keyword(s):  
Negative Impact ◽  
Flood Hazard ◽  
Hazard Analysis ◽  
Lake Basin ◽  
Baikal Lake ◽  
Ice Jams ◽  
Damage Area ◽  
Selenga River ◽  
Ice Jam ◽  
Rational Development

The article presents the results of analysis and assessment of risks related to ice jams on the rivers of the Baikal Lake Basin. It also proposes the recommendations for mitigation and rational development of coastal areas. Data on catastrophic ice jam floods for more than 100 years is presented, the factors of their formation and mechanism of their movement are considered. On the basis of official statistics from expedition surveys, potentially dangerous jamming areas have been identified, and the repeatability and extent of floods have been calculated. With the help of ArcGIS package the scale of possible flooding was determined, which allowed to reveal the list of economic objects within the damage area. Specific indicators have been used to calculate the expected damage to territories, facilities and population from the flood hazard. Analysis and assessment of economic risk from the floods on the Selenga River are given. Measures to minimize risks of negative impact of floods are proposed.

scholarly journals Environmental features and dynamics of plankton communities in a mountain glacial moraine lake (Baikal Lake basin, Russia)

2020 ◽  
Vol 5 (3) ◽  
Author(s):  
Ekaterina Yu. Afonina ◽  
◽  
Natalya A. Tashlykova ◽  
Alexey P. Kuklin ◽  
Gazhit Ts. Tsybekmitova ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Lake Basin ◽  
Baikal Lake ◽  
Environmental Features ◽  
Moraine Lake ◽  
Plankton Communities

scholarly journals Baikal - the rift zone development

Geografie ◽  
1997 ◽  
Vol 102 (2) ◽  
pp. 89-97
Author(s):  
Bohumír Janský
Keyword(s):  
Baikal Region ◽  
Rift Zone ◽  
Lake Basin ◽  
Eastern Siberia ◽  
Baikal Lake ◽  
The South ◽  
Baikal Basin ◽  
Basin Formation ◽  
Tectonic Development ◽  
Zone Development

The article characterizes the formation and development of the Baikal Lake Basin, situated in the south of Eastern Siberia. Attention is also paid to processes of tectonic development of the Baikal region which have influenced the deepening of the Baikal Basin. The author studies in the same time erosional-denudational processes influencing the lake basin formation.

CLIMATIC ANOMALIES IN FAR EASTERN MARGINAL SEAS, BAIKAL LAKE BASIN AND THEIR LINKAGES

2017 ◽  
Author(s):  
Svetlana Shkorba ◽  
Svetlana Shkorba ◽  
Elena Dmitrieva ◽  
Elena Dmitrieva ◽  
Irina Mashkina ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Time Scales ◽  
Lake Basin ◽  
Baikal Lake ◽  
Climatic Indices ◽  
Marginal Seas ◽  
Northeast Pacific ◽  
The Pacific ◽  
South Siberia ◽  
Asian Pacific

Winter climatic anomalies of various time scales in the Japan, Okhotsk seas and Baikal Lake Basin are revealed and compared with anomalies in the Pacific, Indian and Arctic oceans. Time series of ice extent in the Japan and Okhotsk seas, ice thickness and seasonal duration of the ice cover in the Baykal Lake, as well as Hadley SST, surface heat fluxes, wind velocity, atmospheric pressure fields (SLP) and different climatic indices are analyzed. The decadal climate anomalies in the Japan and Okhotsk seas in mid winter, as compared to the Northeast Pacific and South Siberia regions, could have a reversed phase. Alternating cold/warm decadal anomalies in different longitude zones of the North Asian Pacific are accompanied by alternating meridional wind and SLP anomalies at temperate latitudes. Alternating zones of inversed anomalies in temperate latitudes of the Asian Pacific are related to teleconnections with anomalies in both Arctic and Indo-Pacific oceans. Negative SSTA in eastern/central tropical-equatorial Pacific and positive SSTA in El Nino area accompanies rise of northern wind and ice extent in the Okhotsk/Japan Seas in mid-winter. The best predictors of the high cold anomaly in February in the western subarctic Pacific and marginal seas are reduction of the SST and net heat flux from the atmosphere to the ocean in north-eastern and central North Pacific during warm period of a previous year. At the multidecadal time scale the warming/cooling in the Northeast Pacific accompany winter warming/cooling in the Baykal Lake area during all period of observation. At interdecadal time scales the significant link of winter climate oscillations in South Siberia (Baikal Lake Basin) is found with SSTA oscillations in the equatorial region of the Indian Ocean and certain areas of the Pacific Ocean. The linkages of anomalies in the Baikal Lake Basin, Okhotsk, Japan Seas with regional anomalies in some key areas of the Pacific and Indian Oceans, related to the atmospheric centers of action are more stable than that with climatic indices. After climate regime shift in late 70s warm decadal anomaly in both Lake Baykal Basin and Indian Ocean in boreal winter accompany high positive anomaly of the Arctic Oscillation. Scenarios of extreme anomalies in the Baikal Lake Basin and Subarctic Pacific marginal area are also presented.

Graylings of Baikal Lake basin (Thymallus, Thymallidae): Diversity of forms and their taxonomic status

2006 ◽  
Vol 46 (6) ◽  
pp. 418-435 ◽  
Author(s):  
I. B. Knizhin ◽  
S. J. Weiss ◽  
S. Sušnik
Keyword(s):  
Taxonomic Status ◽  
Lake Basin ◽  
Baikal Lake

scholarly journals Sculpin Cottus cf. poecilopus Heckel, 1837 in Baikal Lake Basin: First Findings

2020 ◽  
Vol 31 ◽  
pp. 30-51
Author(s):  
R. S. Andreev ◽  
◽  
A. N. Matveev ◽  
V. P. Samusenok ◽  
A. L. Yuriev ◽  
...  
Keyword(s):  
Rift Zone ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Baikal Rift Zone ◽  
Mountain Lakes ◽  
Lake Basin ◽  
Maturity Stage ◽  
Baikal Lake ◽  
Baikal Basin ◽  
Lena Basin

For the first time for the Baikal Lake basin, evidence of the existence of populations of sculpin Cottus cf. poecilopus Heckel (alpine bullhead) characteristic of the adjacent Lena River basin in large northern Baikal tributaries, the Verkhnaya (Upper) Angara and the Kichera is provided. In June 2009 during the study of the lower reaches of the Kholodnaya River (Kichera-Baikal system), 8 individuals of sculpin aged from 3 to 5 years and in August 2009 5 more specimens aged from 4 to 6 were caught. All fish were fertile with the gonads in maturity stage III. In August 2010 33 individuals aged from 4 to 6 were collected in the main channel of the Upper Angara near Novy Uoyan settl.. At about the same time C.poecilopus was registered in stomachs of Arctic charr from Lake Amut (Churo-Upper Angara-Baikal system) near the divide with the Pravaya (Right) Mama (Mama-Vitim-Lena system). In August 2010 17 specimens aged from 1 to 4 were caught in the Upper Angara near the mouth of its large left tributary the Yanchui River. Sculpins from the rivers Kholodnaya, Upper Angara and Yanchui have higher growth rate as compared to the ones from mountain lakes of the upper Lena basin. About 90 % of males and females matured at the age of 3 years. Absolute fecundity of two females from the Upper Angara River was 149 and 556 (with a mean of 352,5) eggs and of two females from the Kholodnaya River, 223 and 305 (with a mean of 264) eggs. This exceeds the fecundity of sculpins from mountain lakes in the Lena part of Baikal rift zone, which averages less than 150 eggs. Sculpins spawn in the Kholodnaya River in the 1st half of June. The diet of C. cf. poecilopus all over the Baikal basin as well as in adjacent sites in the Lena basin was basically composed of larvae of amphibious insects (trichopterans, ephemeropterans, chironomids and plecopterans). The discovery of the third species from the Lena basin in the Baikal basin following the findings of Arctic charr Salvelinus alpinus and grayling Thymallus baicalolenensis evidences the absence of differences in the structure of ichthyofaunas of the upper parts of both neighboring basins. Sculpins permeate along the streams to mountain lakes more easily than other species and colonize the most elevated ones in lake cascades within the northern part of Baikal rift zone. Their dispersal across the divide could proceed in two ways: via headwater captures or via flattened passes between converging upper reaches of adjacent streams.

CLIMATIC ANOMALIES IN FAR EASTERN MARGINAL SEAS, BAIKAL LAKE BASIN AND THEIR LINKAGES

2017 ◽  
Author(s):  
Svetlana Shkorba ◽  
Svetlana Shkorba ◽  
Elena Dmitrieva ◽  
Elena Dmitrieva ◽  
Irina Mashkina ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Time Scales ◽  
Lake Basin ◽  
Baikal Lake ◽  
Climatic Indices ◽  
Marginal Seas ◽  
Northeast Pacific ◽  
The Pacific ◽  
South Siberia ◽  
Asian Pacific

Winter climatic anomalies of various time scales in the Japan, Okhotsk seas and Baikal Lake Basin are revealed and compared with anomalies in the Pacific, Indian and Arctic oceans. Time series of ice extent in the Japan and Okhotsk seas, ice thickness and seasonal duration of the ice cover in the Baykal Lake, as well as Hadley SST, surface heat fluxes, wind velocity, atmospheric pressure fields (SLP) and different climatic indices are analyzed. The decadal climate anomalies in the Japan and Okhotsk seas in mid winter, as compared to the Northeast Pacific and South Siberia regions, could have a reversed phase. Alternating cold/warm decadal anomalies in different longitude zones of the North Asian Pacific are accompanied by alternating meridional wind and SLP anomalies at temperate latitudes. Alternating zones of inversed anomalies in temperate latitudes of the Asian Pacific are related to teleconnections with anomalies in both Arctic and Indo-Pacific oceans. Negative SSTA in eastern/central tropical-equatorial Pacific and positive SSTA in El Nino area accompanies rise of northern wind and ice extent in the Okhotsk/Japan Seas in mid-winter. The best predictors of the high cold anomaly in February in the western subarctic Pacific and marginal seas are reduction of the SST and net heat flux from the atmosphere to the ocean in north-eastern and central North Pacific during warm period of a previous year. At the multidecadal time scale the warming/cooling in the Northeast Pacific accompany winter warming/cooling in the Baykal Lake area during all period of observation. At interdecadal time scales the significant link of winter climate oscillations in South Siberia (Baikal Lake Basin) is found with SSTA oscillations in the equatorial region of the Indian Ocean and certain areas of the Pacific Ocean. The linkages of anomalies in the Baikal Lake Basin, Okhotsk, Japan Seas with regional anomalies in some key areas of the Pacific and Indian Oceans, related to the atmospheric centers of action are more stable than that with climatic indices. After climate regime shift in late 70s warm decadal anomaly in both Lake Baykal Basin and Indian Ocean in boreal winter accompany high positive anomaly of the Arctic Oscillation. Scenarios of extreme anomalies in the Baikal Lake Basin and Subarctic Pacific marginal area are also presented.

scholarly journals SPLEEN LEUKOCITE COMPOSITION OF SIBERIAN ROUCH AND GOLDFICH, INFECTED WITH PLEUROCERCOIDES THE GENUS LIGULA (CESTODA: PSEUDOPHYLLIDEA)

2021 ◽  
pp. 306-310
Author(s):  
Mazur ◽  
Kutyrev ◽  
Dugarov
Keyword(s):  
Immune Response ◽  
Body Length ◽  
Adaptive Immune Response ◽  
Lake Basin ◽  
Baikal Lake ◽  
Age Composition ◽  
Adaptive Immune ◽  
Comparative Aspect ◽  
Poorly Differentiated ◽  
Vacuolated Cells

In our study, we obtained new data on the leukocyte composition of the spleen of Siberian roach and goldfish infected with Ligula interrupta and Ligula intestinalis, respectively, in a comparative aspect. The sample of fish consisted of non-aquatic catches, the same size-age composition (age + 3 ... + 5, body length 145–237 and 150–180 mm, respectively, weight – 100–184 and 120–174 g) from water bodies of the Baikal lake basin (Dolgoye lake, Cheremukhovoye, Gusinoye). It is noted that in the spleen of goldfish the number of lymphocytes did not change in general, but there was a significant change in the ratio of mature and immature forms: the number of prolymphocytes decreased by 1.5 times, and the content of mature lymphocytes increased by 3.8 times. Unlike goldfish, the infected roach showed the formation of vacuolated cells up to 5.3%, and intense leukopoiesis processes are observed, which is confirmed by a higher content of blasts (by 3 times). Among the granulocytic reactions in fish, similar reactions were observed along the line of neutrophils: a significant increase in poorly differentiated forms in goldfish, as well as mature microphages in roach. It has been shown that, in these parasitic systems, ligulid larvae can be modulators of the adaptive immune response.

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