Mixotrophic plankton and Synechococcus distribution in waters around Svalbard, Norway during June 2019

Bhaskar, P.V.; Bhaskar, Jane Theophline; Jawak, Shridhar D.; Jyothibabu, R.; Mishra, Neelima

doi:10.1016/j.polar.2021.100697

Cited by 6 publications

(3 citation statements)

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“…The cyanobacteria abundance was lower in Indigirka estuary than in the Khatanga and Kolyma estuaries but similar to those reported by Parli et al [24] in waters around Svalbard (80-830 cells/mL). The low PC abundance is probably due to the smaller volume of river runoff of the Indigirka, in contrast to the other two rivers.…”

Section: Discussionsupporting

confidence: 89%

“…In Russian Arctic ecosystems, mainly microbial eukaryotes, as part of the picophytoplankton, are studied through molecular techniques [21][22][23], while cyanobacterial communities in estuaries of Siberian rivers and adjacent areas of the Russian Arctic seas remain underexplored. PC diversity is most studied in the eastern part of the Fram Strait, in the coastal waters of the Chukchi Sea and the Beaufort Sea, in the Mackenzie Shelf and Franklin Bay areas [3,7,10,24]. PC are broadly classified into the genera Prochlorococcus and Synechococcus, which coexist in the open ocean, in polar regions; however, it is Synechococcus that has a wider geographical distribution [24].…”

Section: Introductionmentioning

confidence: 99%

“…PC diversity is most studied in the eastern part of the Fram Strait, in the coastal waters of the Chukchi Sea and the Beaufort Sea, in the Mackenzie Shelf and Franklin Bay areas [3,7,10,24]. PC are broadly classified into the genera Prochlorococcus and Synechococcus, which coexist in the open ocean, in polar regions; however, it is Synechococcus that has a wider geographical distribution [24]. Synechococcus is particularly difficult to identify and classify morphologically, and molecular methods are mostly used for its identification.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Picocyanobacteria in Estuaries of Three Siberian Rivers and Adjacent Shelves of Russian Arctic Seas: Genetic Diversity and Distribution

Belevich,

Milyutina,

Troitsky

2023

Diversity

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Single-cell cyanobacteria, being an integral part of picoplankton in marine ecosystems, have been suggested to be important contributors to primary production and carbon cycles in the global ocean. The spatial distribution, abundance and diversity of natural communities of picocyanobacteria (PC) in estuaries of Khatanga, Indigirka and Kolyma rivers and adjacent shelves of the Laptev and East Siberian seas were studied in September 2017. The PC concentrations were higher in the estuaries than in the shelf stations of the seas. The abundance of PC was 1.25 × 106 cells/L, 0.42 × 106 cells/L and 1.58 × 106 cells/L in the surface layer of Khatanga, Indigirka and Kolyma estuaries, respectively. The contribution of PC to total autumn picophytoplankton abundance averaged 6% and 3% in the Khatanga and Indigirka estuaries and reached 5% in the Kolyma estuary. Phylogenetic analysis of the 16S rRNA gene and ITS region clone libraries revealed picocyanobacterial sequences related to marine Synechococcus subclusters 5.1-I, 5.2 and 5.3. Of the phylotypes from Synechococcus S5.1-I and S5.2 that were found, only several were discovered earlier, while the remaining clones were unique. Two groups of phylotypes (clades A and E) were found that were not closely similar to those previously described in both marine and freshwater habitats. It can be expected that a more detailed study of the phytoplankton of the Arctic seas will further expand our understanding of the diversity of these key components of the food chains of oceanic biocenoses.

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Section: Discussionsupporting

confidence: 89%