Trophic Relationships between Macroinvertebrate and Fish Communities in St. Petersburg Methane Seep in the Abyssal Zone of Lake Baikal

2017 ◽  
Keyword(s):  
Lake Baikal ◽  
Fish Communities ◽  
Trophic Relationships ◽  
Methane Seep ◽  
Abyssal Zone

Trophic relationships between macroinvertebrates and fish in St. Petersburg methane seep community in abyssal zone of Lake Baikal

2017 ◽  
Vol 10 (2) ◽  
pp. 147-156 ◽  
Author(s):  
T. Ya. Sitnikova ◽  
I. V. Mekhanikova ◽  
V. G. Sideleva ◽  
S. I. Kiyashko ◽  
T. V. Naumova ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Trophic Relationships ◽  
Methane Seep ◽  
Abyssal Zone

Microbial communities associated with the ostracods Candona sp. inhabiting the area of the methane seep Goloustnoye (Lake Baikal)

Symbiosis ◽  
2021 ◽  
Author(s):  
I. A. Khalzov ◽  
S. V. Bukin ◽  
A. S. Zakharenko ◽  
S. M. Chernitsyna ◽  
Yu. P. Galachyants ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Lake Baikal ◽  
Methane Seep

scholarly journals Amazing Discoveries of Benthic Fauna from the Abyssal Zone of Lake Baikal

Biology ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 972
Author(s):  
Ilya Kondratov ◽  
Tatiana Sitnikova ◽  
Irina Kaygorodova ◽  
Natalia Denikina ◽  
Vadim Annenkov ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Molecular Genetic ◽  
Benthic Fauna ◽  
Molecular Genetic Analysis ◽  
Artificial Substrates ◽  
Plastic Substrate ◽  
Freshwater Ecosystem ◽  
Abyssal Zone ◽  
First Time ◽  
Natural Laboratory

Lake Baikal is a natural laboratory for the study of species diversity and evolution, as a unique freshwater ecosystem meeting the all of the main criteria of the World Heritage Convention. However, despite many years of research, the true biodiversity of the lake is clearly insufficiently studied, especially that of deep-water benthic sessile organisms. For the first time, plastic waste was raised from depths of 110 to 190 m of Lake Baikal. The aim of this study was to examine the biological community inhabiting the plastic substrate using morphological and molecular genetic analysis. Fragments of plastic packaging materials were densely populated: bryozoans, leeches and their cocoons, capsules of gastropod eggs, and turbellaria cocoons were found. All the data obtained as a result of an analysis of the nucleotide sequences of the standard bar-coding fragment of the mitochondrial genome turned out to be unique. Our results demonstrate the prospects for conducting comprehensive studies of artificial substrates to determine the true biodiversity of benthos in the abyssal zone of Lake Baikal.

Amphipods (Amphipoda, Gammaridea) at the Gorevoy Utes oil and methane seep, Lake Baikal

Crustaceana ◽  
2014 ◽  
Vol 87 (13) ◽  
pp. 1500-1520 ◽  
Author(s):  
Irina V. Mekhanikova ◽  
Irina V. Mekhanikova ◽  
Tatiana Ya. Sitnikova
Keyword(s):  
Electron Microscopy ◽  
Lake Baikal ◽  
Additional Data ◽  
Maximum Density ◽  
Depth Range ◽  
Methane Seep ◽  
Flat Bottom ◽  
Bacterial Mats ◽  
Entire Lake ◽  
Scanning Electron

We examined amphipods collected from aboard the deepwater manned submersibles “Mir-1” and “Mir-2” at oil and methane seeps near Cape Gorevoy Utes (Central Baikal). Most of the 23 taxa registered inhabit the entire Lake Baikal within a wide depth range. Two species of the genus Echiuropus are probably new. Leptostenus leptocerus (Dybowsky, 1874), that, until now, was regarded as a rare species, is likely to be an indicator for methane and oil discharge areas. Additional data on the morphology of this species were obtained; cuticular sensory (lateral line organs) and nonsensory microstructures were examined by scanning electron microscopy. The density of nectobenthic amphipods was 5-6 times higher on bitumen mounds than that at neighbouring sites with flat bottom. Maximum density of benthic amphipods was recorded on bacterial mats. No amphipods were observed at the bottom with large oil patches. High density of amphipods at the oil-methane seep is attributed to highly structured habitats and food abundance.

Oligochaeta from the abyssal zone of Lake Baikal (Siberia, Russia)

1999 ◽  
pp. 165-174
Author(s):  
Patrick Martin ◽  
Koen Martens ◽  
Boudewijn Goddeeris
Keyword(s):  
Lake Baikal ◽  
Abyssal Zone

Fluid migrations at the Krasny Yar methane seep of Lake Baikal according to geochemical data

2020 ◽  
Vol 46 (1) ◽  
pp. 123-131 ◽  
Author(s):  
Tatyana V. Pogodaeva ◽  
Jeffrey Poort ◽  
Giovanni Aloisi ◽  
Lucas Bataillard ◽  
Mikhail M. Makarov ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Geochemical Data ◽  
Methane Seep

scholarly journals Megafauna community structure and trophic relationships at the recently discovered Concepción Methane Seep Area, Chile, ∼36°S

2008 ◽  
Vol 65 (7) ◽  
pp. 1102-1111 ◽  
Author(s):  
J. Sellanes ◽  
E. Quiroga ◽  
C. Neira
Keyword(s):  
Community Structure ◽  
Coastal Upwelling ◽  
Isotope Analysis ◽  
Trophic Relationships ◽  
Methane Seep ◽  
Fixed Carbon ◽  
Hard Substratum ◽  
Taxonomic Analysis ◽  
Commensal Species ◽  
The World

Abstract Sellanes, J., Quiroga, E., and Neira, C. 2008. Megafauna community structure and trophic relationships at the recently discovered Concepción Methane Seep Area, Chile, ∼36°S. – ICES Journal of Marine Science, 65: 1102–1111. The fauna, community composition, and trophic support of the newly discovered Concepción Methane Seep Area (CMSA) are compared with those at a nearby non-seep control. The assemblage of chemosymbiotic bivalves is defined by eight species, including the families Lucinidae, Thyasiridae, Solemyidae, and Vesicomyidae. Seep polychaetes are represented by Lamellibrachia sp. and two commensal species of the vesicomyid Calyptogena gallardoi. Although taxonomic analysis is still under way, most of the chemosymbiotic species seem to be endemics. The CMSA is a hotspot for non-seep benthic megafauna too; 101 taxa were present, but most of them are colonists or vagrants (i.e. not endemics of methane seeps). Isotope analysis supported the belief that non-symbiont-bearing species utilize photosynthetically fixed carbon, because they were isotopically distinct from the chemosymbiotic bivalve species present. It is our opinion that, at this site, which underlies one of the most productive coastal upwelling regions of the world, spatial heterogeneity and the availability of hard substratum, generated by the presence of authigenic carbonate crusts, are more important factors in attracting non-seep fauna than the availability of locally produced chemosynthetic food.

Differentiation of communities of macroinvertebrates and cottoid fish associated with methane seeps of different bottom landscapes of Lake Baikal

2021 ◽  
Vol 325 (4) ◽  
pp. 469-484
Author(s):  
V.G. Sideleva ◽  
T.Ya. Sitnikova
Keyword(s):  
Lake Baikal ◽  
Deep Water ◽  
Gas Hydrates ◽  
Microbial Mats ◽  
Methane Seep ◽  
Methane Seeps ◽  
Saint Petersburg ◽  
Transitional State ◽  
Cottoid Fishes ◽  
Cottoid Fish

The paper presents the results of the study of communities of macroinvertebrates and cottoid fish inhabiting methane seeps of Lake Baikal. For the analysis, we used video surveillance and collection of animals carried out with the help of "Mir" deep-water submersible, as well as NIOZ-type box-corer samplers from the board of a research vessel. Posolskaya Bank and Saint Petersburg methane seeps are located in different basins (southern and middle) and at different depths (300–500 m and ~ 1400 m), characterized by the different underwater landscapes (slope of underwater upland and hills formed by gas hydrates), by the structure of gas hydrates and their depth location in sediments, as well as the composition of microbial mats and communities of microorganisms of bottom sediments. Both seeps are characterized by bubble discharge of methane gas and the formation of highly productive communities of large invertebrates and cottoid fish on seep habitats. Seep animal communities consisted of species-depleted invertebrates and fish of the surrounding deep-water benthal of the Lake. We showed the similarities and differences in the composition of the faunas of two seeps, as well as the quantitative characteristics of taxonomic groups of macroinvertebrates and cottoid fishes. Obligate species have not been revealed on the methane seep Posolskaya Bank. For the methane seep Saint Petersburg, the gastropod species Kobeltocochlea tamarae Sitnikova, Teterina et Maximova, 2021 (Caenogastropoda: Benedictiidae) was designated as an obligate species; among bottom cottoid fishes, Neocottus werestschagini (Taliev, 1953) (Cottoidei: Abyssocottidae) had possible a transitional state to obligate. We presented the data on the assimilation by seep animals of mixed photo- and chemosynthetic food with different proportions of methane-derived carbon. A hypothesis has been substantiated that deep-water seep areas could serve as refugium for the preservation of endemic fauna during the Pliocene-Pleistocene glaciations of Lake Baikal.

scholarly journals Conquest of the deep, old and cold: an exceptional limpet radiation in Lake Baikal

2015 ◽  
Vol 11 (7) ◽  
pp. 20150321 ◽  
Author(s):  
Björn Stelbrink ◽  
Alena A. Shirokaya ◽  
Catharina Clewing ◽  
Tatiana Y. Sitnikova ◽  
Larisa A. Prozorova ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Hydrothermal Vents ◽  
Divergence Time ◽  
Nuclear Data ◽  
Species Flock ◽  
Divergence Time Estimates ◽  
Time Estimates ◽  
Younger Age ◽  
Abyssal Zone ◽  
Age Estimates

Lake Baikal is the deepest, oldest and most speciose ancient lake in the world. The lake is characterized by high levels of molluscan species richness and endemicity, including the limpet family Acroloxidae with 25 endemic species. Members of this group generally inhabit the littoral zone, but have been recently found in the abyssal zone at hydrothermal vents and oil-seeps. Here, we use mitochondrial and nuclear data to provide a first molecular phylogeny of the Lake Baikal limpet radiation, and to date the beginning of intra-lacustrine diversification. Divergence time estimates suggest a considerably younger age for the species flock compared with lake age estimates, and the beginning of extensive diversification is possibly related to rapid deepening and cooling during rifting. Phylogenetic relationships and divergence time estimates do not clearly indicate when exactly the abyssal was colonized but suggest a timeframe coincident with the formation of the abyssal in the northern basin (Middle to Late Pleistocene).

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