Microbial Community Structure Driven by a Volcanic Gradient in Glaciers of the Antarctic Archipelago South Shetland

García‐López, Eva; Serrano, Sandra; Calvo, Miguel Angel Moltó; Perez, Sonia Peña; Sánchez-Casanova, Silvia; García-Descalzo, L.; Cid, Cristina

doi:10.3390/microorganisms9020392

Cited by 12 publications

(9 citation statements)

References 61 publications

(59 reference statements)

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“…Other classes such as Thermodesulfobacteria, Chrysiogenetes, and Thermoprotei were scarcely represented (Figure 2A). These proportions of bacteria are analogous to those found in glaciers located in similar latitudes such as some Alpine (Franzetti et al, 2017;Azzoni et al, 2018), or Asian glaciers (Chen et al, 2016), but different from those found in the polar glaciers (García-Lopez et al, 2021). Some groups were exclusively identified in the oldest samples as the bacterial phyla Fusobacteria and Calditrichaeota.…”

Section: Microbial Community Compositionsupporting

confidence: 62%

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Glacial Ice Age Shapes Microbiome Composition in a Receding Southern European Glacier

et al. 2021

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Glaciers and their microbiomes are exceptional witnesses of the environmental conditions from remote times. Climate change is threatening mountain glaciers, and especially those found in southern Europe, such as the Monte Perdido Glacier (northern Spain, Central Pyrenees). This study focuses on the reconstruction of the history of microbial communities over time. The microorganisms that inhabit the Monte Perdido Glacier were identified using high-throughput sequencing, and the microbial communities were compared along an altitudinal transect covering most of the preserved ice sequence in the glacier. The results showed that the glacial ice age gradient did shape the diversity of microbial populations, which presented large differences throughout the last 2000 years. Variations in microbial community diversity were influenced by glacial conditions over time (nutrient concentration, chemical composition, and ice age). Some groups were exclusively identified in the oldest samples as the bacterial phyla Fusobacteria and Calditrichaeota, or the eukaryotic class Rhodophyceae. Among groups only found in modern samples, the green sulfur bacteria (phylum Chlorobi) stood out, as well as the bacterial phylum Gemmatimonadetes and the eukaryotic class Tubulinea. A patent impact of human contamination was also observed on the glacier microbiome. The oldest samples, corresponding to the Roman Empire times, were influenced by the beginning of mining exploitation in the Pyrenean area, with the presence of metal-tolerant microorganisms. The most recent samples comprise 600-year-old ancient ice in which current communities are living.

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Section: Microbial Community Compositionsupporting

confidence: 62%

“…In these reports, the majority of OTUs belonged to Chlorophyta and Fungi. However, in polar glaciers, the eukaryotic proportions were more diverse and influenced by a range of local factors, so they are not comparable to those of the Pyrenean glaciers (Anesio et al, 2017;García-Lopez et al, 2021).…”

Section: Microbial Community Compositionmentioning

confidence: 95%

Glacial Ice Age Shapes Microbiome Composition in a Receding Southern European Glacier

et al. 2021

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“…Bacteria inside glaciers are represented by the phyla Proteobacteria (mainly Gammaproteobacteria and Alphaproteobacteria), Bacteroidetes (class Bacteroidia, order Flavobacteriales), Firmicutes, Actinobacteria, Acidobacteria, Verrucomicrobia, Planctomyetes, and Gemmatimonadetes with prevalent genera Flavobacterium, Luteolibacter, Rhodoferax, Rhodanobacter, Dokdonella, and Polaromonas [52,135]. Typical Antarctic psychrotrophic and psychrotolerant bacteria in glaciers include the genera Polaribacter, Polaromonas, Psychrobacter, Psychromonas, and Cryobacterium.…”

Section: Ice and Glacial Microbial Communitiesmentioning

confidence: 99%

Microbial Community Composition of the Antarctic Ecosystems: Review of the Bacteria, Fungi, and Archaea Identified through an NGS-Based Metagenomics Approach

Doytchinov

Dimov

2022

Life

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Antarctica represents a unique environment, both due to the extreme meteorological and geological conditions that govern it and the relative isolation from human influences that have kept its environment largely undisturbed. However, recent trends in climate change dictate an unavoidable change in the global biodiversity as a whole, and pristine environments, such as Antarctica, allow us to study and monitor more closely the effects of the human impact. Additionally, due to its inaccessibility, Antarctica contains a plethora of yet uncultured and unidentified microorganisms with great potential for useful biological activities and production of metabolites, such as novel antibiotics, proteins, pigments, etc. In recent years, amplicon-based next-generation sequencing (NGS) has allowed for a fast and thorough examination of microbial communities to accelerate the efforts of unknown species identification. For these reasons, in this review, we present an overview of the archaea, bacteria, and fungi present on the Antarctic continent and the surrounding area (maritime Antarctica, sub-Antarctica, Southern Sea, etc.) that have recently been identified using amplicon-based NGS methods.

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“…The concentration of major (Cl, S, C, K, Na, P, Xe, Mg, Ca, Fe, Co, Mn, Ti, Cr, and Ni), minor, and trace elements ( Supplementary Table S1 ) was quantified by inductively coupled plasma-mass spectrometry (ICP-MS) on a PerkinElmer ELAN9000 ICP-MS quadrupole spectrometer. The samples were introduced into the ICP-MS via a RytonTM cross-flow nebulizer (PerkinElmer, Waltham, MA, United States), Scott spray chamber (PerkinElmer), and Cetac ASX-510 autosampler (Omaha, Nebraska, United States; García-Lopez et al, 2021a ).…”

Section: Methodsmentioning

confidence: 99%

Microbial Communities in Volcanic Glacier Ecosystems

et al. 2022

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Glaciers constitute a polyextremophilic environment characterized by low temperatures, high solar radiation, a lack of nutrients, and low water availability. However, glaciers located in volcanic regions have special characteristics, since the volcanic foci provide them with heat and nutrients that allow the growth of microbial communities highly adapted to this environment. Most of the studies on these glacial ecosystems have been carried out in volcanic environments in the northern hemisphere, including Iceland and the Pacific Northwest. To better know, the microbial diversity of the underexplored glacial ecosystems and to check what their specific characteristics were, we studied the structure of bacterial communities living in volcanic glaciers in Deception Island, Antarctica, and in the Kamchatka peninsula. In addition to geographic coordinates, many other glacier environmental factors (like volcanic activity, altitude, temperature, pH, or ice chemical composition) that can influence the diversity and distribution of microbial communities were considered in this study. Finally, using their taxonomic assignments, an attempt was made to compare how different or similar are the biogeochemical cycles in which these microbiomes are involved.

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Microbial Community Structure Driven by a Volcanic Gradient in Glaciers of the Antarctic Archipelago South Shetland

Cited by 12 publications

References 61 publications

Glacial Ice Age Shapes Microbiome Composition in a Receding Southern European Glacier

Glacial Ice Age Shapes Microbiome Composition in a Receding Southern European Glacier

Microbial Community Composition of the Antarctic Ecosystems: Review of the Bacteria, Fungi, and Archaea Identified through an NGS-Based Metagenomics Approach

Microbial Communities in Volcanic Glacier Ecosystems

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