Bacterial and archaeal community structure in benthic sediments from glacial lakes at the Múlajökull Glacier, central Iceland

Lamsters, Kristaps; Ustinova, Monta; Birzniece, Līga; Silamiķelis, Ivars; Gaidelene, J.; Karušs, Jānis; Krievāns, Māris; Kasparinskis, Raimonds; Fridmanis, Dāvids; Muter, Olga

doi:10.1007/s00300-020-02770-8

Cited by 3 publications

(5 citation statements)

References 75 publications

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“…Stanley GFS (as compared to other high-latitude GFS) is not unexpected given that these cyanobacteria have been repeatedly reported from the cryosphere (e.g. cryoconites) [ 8 , 69 , 70 ].…”

Section: Resultsmentioning

confidence: 80%

The dark side of the moon: first insights into the microbiome structure and function of one of the last glacier-fed streams in Africa

et al. 2023

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The glaciers on Africa's ‘Mountains of the Moon' (Rwenzori National Park, Uganda) are predicted to disappear within the next decades owing to climate change. Consequently, the glacier-fed streams (GFSs) that drain them will vanish, along with their resident microbial communities. Despite the relevance of microbial communities for performing ecosystem processes in equatorial GFSs, their ecology remains understudied. Here, we show that the benthic microbiome from the Mt. Stanley GFS is distinct at several levels from other GFSs. Specifically, several novel taxa were present, and usually common groups such as Chrysophytes and Polaromonas exhibited lower relative abundances compared to higher-latitude GFSs, while cyanobacteria and diatoms were more abundant. The rich primary producer community in this GFS likely results from the greater environmental stability of the Afrotropics, and accordingly, heterotrophic processes dominated in the bacterial community. Metagenomics revealed that almost all prokaryotes in the Mt. Stanley GFS are capable of organic carbon oxidation, while greater than 80% have the potential for fermentation and acetate oxidation. Our findings suggest a close coupling between photoautotrophs and other microbes in this GFS, and provide a glimpse into the future for high-latitude GFSs globally where primary production is projected to increase with ongoing glacier shrinkage.

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“…Stanley GFS (as compared to other high-latitude GFS) is not unexpected given that these cyanobacteria have been repeatedly reported from the cryosphere (e.g. cryoconites) [ 8 , 69 , 70 ].…”

Section: Resultsmentioning

confidence: 80%

The dark side of the moon: first insights into the microbiome structure and function of one of the last glacier-fed streams in Africa

et al. 2023

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“…This was followed by increased abundance of Actinobacteria and Bacteroidota and decreased abundance of Alphaproteobacteria [100]. A similar pattern of reduced diversity with distance from the glacier was demonstrated in sediments of Icelandic proglacial lakes, Lamsters et al (2020) showed that the oldest, least oligotrophic, furthest lake from the glacier had a considerably different community assemblage and lower taxonomic diversity compared to the younger lake that was still hydrologically connected to the glacier [102]. Contrary to these studies, a more recent analysis of five proglacial chronosequences demonstrated an increase in both bacterial cell number and diversity in older lakes, further from the glacier [8], suggesting no universal trend in proglacial lake succession.…”

Section: Plos Climatementioning

confidence: 74%

“…Proglacial lakes are variable in physicochemical characteristics (although generally characterised by oligotrophy) and microbial diversity, as they often depend on the influx of glacial streams and meltwater [8,22,78]. Consequently, the microbial taxa often found in glacial lakes are similar to those in streams, characterised by the presence of Pseudomonadota, Bacteroidia, Actinobacteria, Planctomycetes, Verrucomicrobia, Chloroflexi, and at times Acidobacteria, Patescibacteria, Elusimicrobia, and Cyanobacteria, as well as microalgae and diatoms, in addition to overall low abundances of archaea [78,[99][100][101][102][103][104].…”

Section: Plos Climatementioning

confidence: 99%

“…Overall research on microbiomes in Arctic glacial forefields is generally limited to phylogenetic identification [6,85,102], although some recent studies are expanding upon this with greater metagenomic insights [7,8,51]. While there are Arctic centric studies that utilise multiomics, these are not focused on proglacial environments [21,125].…”

Section: Future Perspectivesmentioning

confidence: 99%

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Microbial dynamics in rapidly transforming Arctic proglacial landscapes

Marsh,

Chernikhova,

Thiele

et al. 2024

PLOS Clim

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Arctic glacial environments are rapidly changing, as the Arctic warms at a rate three to four times faster than the global average (the phenomenon known as Arctic amplification). Microorganisms are uniquely adapted to extreme glacial environments and studying how ecological and climatic feedback loops affect the diversity of these communities is crucial to the characterisation of vulnerable Arctic habitats. Glacial landscapes span a wide range of habitats, from glacier ice to marine waters, and encompass terrestrial, aquatic, and interzonal systems. While glacier shrinkage has been the focus of scientific attention, auxiliary habitats are also impacted by rapid glacier retreat. Auxiliary habitats include terrestrial systems, such as outwash plains, vegetated periglacial environments, and aquatic systems, such as glacier-fed streams, lakes, and glacier-adjacent marine environments. Glacier recession drives high-impact changes in glacier-associated habitats: rising temperatures, increased light penetration of glacial streams, changes in nitrogen-to-phosphate ratios, and increases in availability of glacier-derived organic compounds. In turn, microbial systems in these habitats may experience changes in nutrient dynamics and shifts in community structures. The exposure of new lands by retreating glaciers may also result in increased dust and microbial dispersal into the atmosphere. Here, we discuss the effects of climate change on glacial microbiomes and the feedback loops between microbial community dynamics and the large-scale climatic processes in the Arctic. We characterise aspects of vulnerable microbial ecosystems and highlight the importance of preserving unseen microbial biodiversity. We then outline current capacities for microbial conservation, focusing on cryopreservation and biobanking. Lastly, we suggest future research directions and steps that academic and governmental institutions may take to foster research and collaboration with Indigenous communities.

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“…Tos analizēja speciālisti no LU ĢZZF, LU Mikrobioloģijas un biotehnoloģijas institūta un no Latvijas Biomedicīnas pētījumu un studiju centra, kur tika veikta paraugu DNS sekvencēšana. Rezultāti atklāja mikroorganismu daudzveidību un dažādību pieledāja ezeros (Lamsters et al, 2020d).…”

Section: Grenlande -2016unclassified

Mūsdienu ledāji

Lamsters¹

2021

Self Cite

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Monogrāfijas mērķis ir iepazīstināt Zemes zinātņu un citu dabaszinātņu studentus un plašāku sabiedrību ar jautājumiem par mūsdienu ledāju un ledus vairogu attīstību, klasifikāciju, plūsmas mehānismiem, deformāciju, hidroloģiju, termālo struktūru, izplatību, izmaiņām un aktuālākajiem zinātniskajiem pētījumiem, kā arī ar Latvijas Universitātes zinātnieku polāro ekspedīciju organizāciju, norisi un rezultātiem. Galvenā uzmanība grāmatā pievērsta mūsdienu ledāju, galvenokārt Arktikas un Antarktikas reģionu ledus vairogu, raksturojumam, jo šie ledāji ietver lielāko daļu pasaules ledāju ledus masas. Papildus aplūkota arī ledus un ledājiem līdzīgu formu izplatība Saules sistēmas debess ķermeņos. Vienlaikus ar izpratni par mūsdienu ledus vairogiem lasītājs gūs arī zināšanas par to, kā veidojušies, izzuduši pagātnes ledus vairogi, kas reiz klāja lielu daļu Ziemeļamerikas, Eirāzijas, iekļaujot Latviju, un kādi bijuši to dinamiskie procesi. Monogrāfiju bagātīgi ilustrē fotogrāfijas (tās galvenokārt uzņēmis grāmatas autors un viņa līdzgaitnieki), kā arī ekspedīcijās pētīto ledāju vizualizācijas, un šie materiāli nozīmīgi papildina tekstu, veicinot ar ledājiem saistīto procesu izpratni. Autors, pamatojoties uz savu pieredzi un novērojumiem mūsdienu ledājos, kā arī atspoguļoto jaunākajos zinātniskajos pētījumos, apskata nozīmīgākos pētniecības jautājumus un norises pasaules ledājos. Latvijas zinātnieku polāro ekspedīciju apraksts, cerams, kļūs par piemēru un iedvesmas avotu studentiem un pētniekiem, kas vēlas nākotnē turpināt attīstīt polāro pētījumu jomu Latvijā. Monogrāfijā apskatīta gan ekspedīciju organizācija un ikdiena, gan arī zinātniskie pētījumi un to rezultāti. Grāmata publicēta latviešu valodā, lai tā, kļūstot par vienu no retajiem uzziņu avotiem tiem latviešu lasītājiem, kuri vēlas izprast ledāju procesus un parādības dzimtajā valodā, veicinātu arī zinātnes terminoloģijas attīstību.

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Bacterial and archaeal community structure in benthic sediments from glacial lakes at the Múlajökull Glacier, central Iceland

Cited by 3 publications

References 75 publications

The dark side of the moon: first insights into the microbiome structure and function of one of the last glacier-fed streams in Africa

The dark side of the moon: first insights into the microbiome structure and function of one of the last glacier-fed streams in Africa

Microbial dynamics in rapidly transforming Arctic proglacial landscapes

Mūsdienu ledāji

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