Prokaryotic Diversity and Metabolically Active Communities in Brines from Two Perennially Ice-Covered Antarctic Lakes

Abstract Antarctic lakes have generally simple periphyton communities when compared with those of lower latitudes. To date, assessment of microbial diversity in Antarctica has relied heavily on traditional direct observation and cultivation methods. In this study, sterilized cotton baits were left submerged for two years in two lakes on King George Island and Deception Island, South Shetland Islands (Maritime Antarctic), followed by assessment of diversity by metabarcoding using high-throughput sequencing. DNA sequences of 44 taxa belonging to four kingdoms and seven phyla were found. Thirty-six taxa were detected in Hennequin Lake on King George Island and 20 taxa were detected in Soto Lake on Deception Island. However, no significant difference in species composition was detected between the two assemblages (Shannon index). Our data suggest that metabarcoding provides a suitable method for the assessment of periphyton biodiversity in oligotrophic Antarctic lakes.

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Active Communities and Practices of Resistance: Brief History of the Use of Schools as Border Zones in Toronto

Critical Schooling ◽

10.1007/978-3-030-00716-4_8 ◽

2018 ◽

pp. 175-199

Author(s):

Francisco J. Villegas

Keyword(s):

Border Zones ◽

History Of ◽

Active Communities

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L.I.F.E. in Antarctic Lakes

Polar Microbiology ◽

10.1201/9781420083880-c4 ◽

2009 ◽

pp. 95-113 ◽

Cited By ~ 1

Author(s):

Birgit Sattler ◽

Michael Storrie-Lombardi

Keyword(s):

Antarctic Lakes

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Co-evolution of cyanophage and cyanobacteria in Antarctic lakes: adaptive responses to high UV flux and global warming

10.1117/12.745960 ◽

2007 ◽

Cited By ~ 1

Author(s):

Michael C. Storrie-Lombardi ◽

Holly C. Pinkart

Keyword(s):

Global Warming ◽

Adaptive Responses ◽

Antarctic Lakes

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Prokaryotic Diversity from Extreme Environments of Pakistan and its Potential Applications at Regional Levels

10.1101/342949 ◽

2018 ◽

Author(s):

Raees Khan ◽

Muhammad Israr Khan ◽

Amir Zeb ◽

Nazish Roy ◽

Muhammad Yasir ◽

...

Keyword(s):

Bacterial Diversity ◽

Functional Diversity ◽

Wide Spectrum ◽

Extreme Environments ◽

Regional Level ◽

Bioenergy Production ◽

Prokaryotic Diversity ◽

Potential Applications ◽

Biotechnological Processes

AbstractExtremophiles, the microorganisms thriving in extreme environments, provide valuable resources for practicing novel biotechnological processes. Pakistan homes a wide spectrum of extreme environments which harbor various biotechnologically significant microorganisms. This review gauges the structural and functional bacterial diversity of several extreme environments, emphasizing their potentials as a source of extremozymes, and in bioleaching, bioremediation, and bioenergy production at regional level. Further, this review highlights a panoramic account of the local natural conservatories of extremophiles. The inadequacies of current fragmental research are discussed with suggestions to quantitatively define the structural and functional diversity of unexplored extreme localities.

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