Cyanobacterial diversity of Svalbard Archipelago

Davydov, Denis

doi:10.1007/s00300-021-02931-3

Cited by 8 publications

(7 citation statements)

References 56 publications

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“…This is in agreement with previous studies showing that many lineages of Cyanobacteria are distributed across the cold biosphere [20,77,78]. Most MAGs are affiliated with filamentous taxa in the orders Synechococcales (n=17), Oscillatoriales (n=8), and Nostocales (n=4), highlighting the importance of filamentous Cyanobacteria as the ecosystem builders of polar microbial mats [4,5,79,80]. Moreover, Cyanobacteria belonging to the order Nostocales often dominate the microbial communities in oligotrophic polar environments due to their ability to fix atmospheric nitrogen [4][5][6][7].…”

Section: Metagenomics Reveals Novel Genomic Diversity Of Polar Cyanob...supporting

confidence: 91%

“…arctowskii and C . austro-polonicus ) [15, 19, 20, 79, 80, 91]. Finally, the two Chroococcales MAGs (‘PMM_0021’ and ‘PMM_0086’) formed a distinct lineage related to Microcystis and several MAGs recovered from Arctic lakes (BioProject PRJEB38681) (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…2). Chamaesiphon is a cosmopolitan genus that is often reported in polar and alpine terrestrial and aquatic environments, and includes two species potentially endemic to Antarctica (C. arctowskii and C. austro-polonicus) [15,19,20,79,80,91]. Finally, the two Chroococcales MAGs ('PMM_0021' and 'PMM_0086') formed a distinct lineage related to Microcystis and several MAGs recovered from Arctic lakes (BioProject PRJEB38681) (Fig.…”

Section: Metagenomics Reveals Novel Genomic Diversity Of Polar Cyanob...mentioning

confidence: 99%

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Novel diversity of polar Cyanobacteria revealed by genome-resolved metagenomics

Pessi

Popin

Durieu

et al. 2023

Preprint

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Benthic microbial mats dominated by Cyanobacteria are important features of polar lakes. Although culture-independent studies have provided important insights into their diversity, only a handful of genomes of polar Cyanobacteria have been sequenced to date. Here, we applied a genome-resolved metagenomics approach to data obtained from Arctic, sub-Antarctic, and Antarctic microbial mats. We recovered 22 unique metagenome-assembled genomes (MAGs) of Cyanobacteria, most of which are only distantly related to genomes that have been sequenced so far. These include i) lineages that are common in polar microbial mats such as the filamentous taxa Pseudanabaena, Leptolyngbya, Microcoleus/Tychonema, and Phormidium; ii) the less common taxa Crinalium and Chamaesiphon; iii) an enigmatic Chroococcales lineage only distantly related to Microcystis; and iv) an early branching lineage in the order Gloeobacterales that is almost exclusively restricted to the cold biosphere, for which we propose the name Candidatus Sivonenia alaskensis. Our results show that genome-resolved metagenomics is a powerful tool for expanding our understanding of the diversity of Cyanobacteria, especially in understudied remote and extreme environments.

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Section: Metagenomics Reveals Novel Genomic Diversity Of Polar Cyanob...supporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Metagenomics Reveals Novel Genomic Diversity Of Polar Cyanob...mentioning

confidence: 99%

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Novel diversity of polar Cyanobacteria revealed by genome-resolved metagenomics

Pessi

Popin

Durieu

et al. 2023

Preprint

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“…The two Synechococcales MAGs (‘PMM_0022’ and ‘PMM_0072’) clustered alongside Chamaesiphon minutus PCC 6605 and Chamaesiphon polymorphus CCALA 037 (). Chamaesiphon is a cosmopolitan genus that is often reported in polar and alpine terrestrial and aquatic environments, and includes two species potentially endemic to Antarctica ( Chamaesiphon arctowskii and Chamaesiphon austro-polonicus ) [16, 20, 21, 84, 85, 96]. Finally, the two Chroococcales MAGs (‘PMM_0021’ and ‘PMM_0086’) formed a distinct lineage related to Microcystis and several MAGs recovered from Arctic lakes (BioProject PRJEB38681) ().…”

Section: Resultsmentioning

confidence: 99%

Novel diversity of polar Cyanobacteria revealed by genome-resolved metagenomics

et al. 2023

View full text Add to dashboard Cite

Benthic microbial mats dominated by Cyanobacteria are important features of polar lakes. Although culture-independent studies have provided important insights into the diversity of polar Cyanobacteria, only a handful of genomes have been sequenced to date. Here, we applied a genome-resolved metagenomics approach to data obtained from Arctic, sub-Antarctic and Antarctic microbial mats. We recovered 37 metagenome-assembled genomes (MAGs) of Cyanobacteria representing 17 distinct species, most of which are only distantly related to genomes that have been sequenced so far. These include (i) lineages that are common in polar microbial mats such as the filamentous taxa Pseudanabaena , Leptolyngbya , Microcoleus / Tychonema and Phormidium; (ii) the less common taxa Crinalium and Chamaesiphon ; (iii) an enigmatic Chroococcales lineage only distantly related to Microcystis ; and (iv) an early branching lineage in the order Gloeobacterales that is distributed across the cold biosphere, for which we propose the name Candidatus Sivonenia alaskensis. Our results show that genome-resolved metagenomics is a powerful tool for expanding our understanding of the diversity of Cyanobacteria, especially in understudied remote and extreme environments.

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“…The flora of this region exceeds that of most of the studied regions of the Eurasian part of the Arctic. It is second only to the flora of Svalbard [44] and the Nenets Autonomous Okrug (AO) [1].…”

Section: Resultsmentioning

confidence: 99%

Cyanobacterial Diversity of the Northern Polar Ural Mountains

Davydov

2021

Diversity

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This study provides new results from an inventory of cyanobacterial species from the Northern Polar Ural Mountains. The article also compiles all existing published data on the cyanobacterial diversity of the region. This ecoregion is located in a unique geographical position in the transition between the sub-Arctic and low Arctic zones and heterogeneous natural conditions. Likely, the unexplored biodiversity of this area’s terrestrial cyanobacteria is high. In total, 52 localities were studied, with 232 samples collected. Cyanobacterial samples were studied under a light microscope. Species were identified based on morphological characteristics only. A total of 93 species of cyanobacteria were identified in different habitats; 70 species were found on wet rocks, 35 on the shores of water bodies, 27 in slow streams, and 21 on waterfalls. In total, 37 species are reported as part of the Ural flora for the first time, while three species (Chroococcus ercegovicii, Gloeocapsopsis cyanea, Gloeothece tepidariorum) were detected in Russian territory for the first time. The composition of the cyanobacterial flora of the Polar Urals was compared with the flora of the nearby Arctic and sub-Arctic regions. According to the Sorensen similarity index, the Polar Urals’ flora is more like the flora of Nenets Autonomous Okrug.

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Cyanobacterial diversity of Svalbard Archipelago

Cited by 8 publications

References 56 publications

Novel diversity of polar Cyanobacteria revealed by genome-resolved metagenomics

Novel diversity of polar Cyanobacteria revealed by genome-resolved metagenomics

Novel diversity of polar Cyanobacteria revealed by genome-resolved metagenomics

Cyanobacterial Diversity of the Northern Polar Ural Mountains

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