Deep water temperature variation of Lake Baikal during 1972–2007

Abstract In this report, we have compared the fatty acid composition of the endemic Lake Baikal amphipods Ommatogammarus albinus (Dybowsky, 1874) and Parapallasea lagowskii (Dybowsky, 1874). Specimens were sampled using the deep-water manned submersible “Mir” at the oil-methane seeps of Cape Gorevoy Utes and at a hydrothermal vent in Frolikha Bay. High levels of monounsaturated fatty acids and relatively low levels of saturated and polyunsaturated fatty acids were detected in the studied amphipods, with oleic and palmitic acid representing the main fatty acid components. The habitat of the amphipods exerted a profound effect on their fatty acid profile: the amphipods of Gorevoy Utes contained higher levels of linolenic 18:3n3 and arachidonic 20:4n6 acids, while the amphipods of Frolikha Bay contained higher levels of eicosapentaenoic 20:5n3 and docosahexaenoic 22:6n3 acid. Based on these findings, we suggest that the amphipods’ diet in different areas of Lake Baikal determines their fatty acid composition.

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Spatiotemporal Changes in the Phytoplankton in Lake Baikal during Late Summer: I. Water Temperature and Phytoplankton Abundance

Inland Water Biology ◽

10.1134/s1995082920010083 ◽

2020 ◽

Vol 13 (1) ◽

pp. 31-40

Author(s):

L. S. Krashchuk ◽

S. V. Shimaraeva ◽

E. A. Silow

Keyword(s):

Water Temperature ◽

Lake Baikal ◽

Late Summer ◽

Phytoplankton Abundance ◽

Spatiotemporal Changes

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Surface water temperature, salinity, and density changes in the northeast Atlantic during the last 45,000 years: Heinrich events, deep water formation, and climatic rebounds

Paleoceanography ◽

10.1029/94pa03040 ◽

1995 ◽

Vol 10 (3) ◽

pp. 527-544 ◽

Cited By ~ 153

Author(s):

M. A. Maslin ◽

N. J. Shackleton ◽

U. Pflaumann

Keyword(s):

Surface Water ◽

Water Temperature ◽

Deep Water ◽

Surface Water Temperature ◽

Deep Water Formation ◽

Northeast Atlantic ◽

Heinrich Events ◽

Water Formation

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Relationship between salinity and the 3H-3He age in deep water of Lake Baikal

Doklady Earth Sciences ◽

10.1134/s1028334x06040301 ◽

2006 ◽

Vol 408 (1) ◽

pp. 645-648

Author(s):

M. N. Shimaraev ◽

R. Yu. Gnatovskii ◽

V. V. Blinov ◽

A. A. Zhdanov

Keyword(s):

Lake Baikal ◽

Deep Water

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Deep-water renewal and biological production in Lake Baikal

Nature ◽

10.1038/349665a0 ◽

1991 ◽

Vol 349 (6311) ◽

pp. 665-669 ◽

Cited By ~ 194

Author(s):

R. F. Weiss ◽

E. C. Carmack Carmack ◽

V. M. Koropalov

Keyword(s):

Lake Baikal ◽

Deep Water ◽

Biological Production ◽

Water Renewal

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Endemic Lake Baikal sponges from deep water. 2: Taxonomy and Bathymetric Distribution

Zootaxa ◽

10.11646/zootaxa.4236.2.8 ◽

2017 ◽

Vol 4236 (2) ◽

pp. 335 ◽

Cited By ~ 2

Author(s):

VALERIA B. ITSKOVICH ◽

OXANA V. KALUZHNAYA ◽

ELENA VEYNBERG ◽

DIRK ERPENBECK

Keyword(s):

New Species ◽

Lake Baikal ◽

Deep Water ◽

Great Depth ◽

Limiting Factor ◽

Bathymetric Distribution ◽

Morphological Studies ◽

Lubomirskia Baicalensis ◽

The Family ◽

Baikalospongia Intermedia

Unique samples of deep-water sponges of Lake Baikal were collected between 120 and 1450 m depth and their taxonomy and bathymetric distribution were studied. Based on morphological studies with scanning electron microscopy (SEM) and molecular analyses (CO1, ITS) we describe a new species, Baikalospongia abyssalis sp. nov. Spicule morphology of this new species is similar to Palaeoephydatia sp., a species previously known only from fossils in Late Pliocene (3.2−2.8 mya) sediments. Other sponge samples collected were identified as Baikalospongia intermedia intermedia, B. intermedia profundalis, B. bacillifera, B. fungiformis, B. martinsoni and Swartschewskia papyracea, all from the family Lubomirskiidae. Sponge specimens with giant spicules, identified as B. fungiformis, were found at great depths. B.i. intermedia and B. i. profundalis are dominating species at great depth. Light is a limiting factor for distribution of Lubomirskia baicalensis, possibly due to its symbiosis with photosynthetic protists. The current study extends our knowledge on the distribution boundaries of Lubomirskiidae at great depths.

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On the Linkage between Antarctic Surface Water Stratification and Global Deep-Water Temperature

Journal of Climate ◽

10.1175/2011jcli3642.1 ◽

2011 ◽

Vol 24 (14) ◽

pp. 3545-3557 ◽

Cited By ~ 7

Author(s):

Ralph F. Keeling ◽

Martin Visbeck

Keyword(s):

Water Temperature ◽

North Atlantic ◽

Deep Water ◽

Surface Waters ◽

Feedback Loop ◽

Deep Ocean ◽

Static Stability ◽

Deep Waters ◽

Water Stratification ◽

The Antarctic

Abstract The suggestion is advanced that the remarkably low static stability of Antarctic surface waters may arise from a feedback loop involving global deep-water temperatures. If deep-water temperatures are too warm, this promotes Antarctic convection, thereby strengthening the inflow of Antarctic Bottom Water into the ocean interior and cooling the deep ocean. If deep waters are too cold, this promotes Antarctic stratification allowing the deep ocean to warm because of the input of North Atlantic Deep Water. A steady-state deep-water temperature is achieved such that the Antarctic surface can barely undergo convection. A two-box model is used to illustrate this feedback loop in its simplest expression and to develop basic concepts, such as the bounds on the operation of this loop. The model illustrates the possible dominating influence of Antarctic upwelling rate and Antarctic freshwater balance on global deep-water temperatures.

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