Microbial assemblages in pressurized antarctic brine pockets (Tarn flat, northern Victoria land): A hotspot of biodiversity and activity
Two distinct pressurized hypersaline brine pockets (named TF4 and TF5), separated by a thin ice layer, were detected below an ice-sealed Antarctic lake. Prokaryotic (bacterial and archaeal) diversity, abundances (including virus-like particles) and metabolic profiles were investigated by an integrat...
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2019
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Online Access: | https://hdl.handle.net/11383/2152831 https://doi.org/10.3390/microorganisms7090333 |
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ftuninsubriairis:oai:irinsubria.uninsubria.it:11383/2152831 2024-04-14T08:03:33+00:00 Microbial assemblages in pressurized antarctic brine pockets (Tarn flat, northern Victoria land): A hotspot of biodiversity and activity Papale M. Lo Giudice A. Conte A. Rizzo C. Rappazzo A. C. Maimone G. Caruso G. La Ferla R. Azzaro M. Gugliandolo C. Paranhos R. Cabral A. S. Spica V. R. Guglielmin M. Papale, M. Lo Giudice, A. Conte, A. Rizzo, C. Rappazzo, A. C. Maimone, G. Caruso, G. La Ferla, R. Azzaro, M. Gugliandolo, C. Paranhos, R. Cabral, A. S. Spica, V. R. Guglielmin, M. 2019 ELETTRONICO https://hdl.handle.net/11383/2152831 https://doi.org/10.3390/microorganisms7090333 eng eng info:eu-repo/semantics/altIdentifier/pmid/31505750 info:eu-repo/semantics/altIdentifier/wos/WOS:000489131300060 volume:7 issue:9 firstpage:1 lastpage:25 numberofpages:25 journal:MICROORGANISMS https://hdl.handle.net/11383/2152831 doi:10.3390/microorganisms7090333 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85074267226 info:eu-repo/semantics/openAccess Brine pocket Hyperthermophile Metabolic potential Methanogen Sulphur-reducing bacteria info:eu-repo/semantics/article 2019 ftuninsubriairis https://doi.org/10.3390/microorganisms7090333 2024-03-21T19:13:50Z Two distinct pressurized hypersaline brine pockets (named TF4 and TF5), separated by a thin ice layer, were detected below an ice-sealed Antarctic lake. Prokaryotic (bacterial and archaeal) diversity, abundances (including virus-like particles) and metabolic profiles were investigated by an integrated approach, including traditional and new-generation methods. Although similar diversity indices were computed for both Bacteria and Archaea, distinct bacterial and archaeal assemblages were observed. Bacteroidetes and Gammaproteobacteria were more abundant in the shallowest brine pocket, TF4, and Deltaproteobacteria, mainly represented by versatile sulphate-reducing bacteria, dominated in the deepest, TF5. The detection of sulphate-reducing bacteria and methanogenic Archaea likely reflects the presence of a distinct synthrophic consortium in TF5. Surprisingly, members assigned to hyperthermophilic Crenarchaeota and Euryarchaeota were common to both brines, indicating that these cold habitats host the most thermally tolerant Archaea. The patterns of microbial communities were different, coherently with the observed microbiological diversity between TF4 and TF5 brines. Both the influence exerted by upward movement of saline brines from a sub-surface anoxic system and the possible occurrence of an ancient ice remnant from the Ross Ice Shelf were the likely main factors shaping the microbial communities. Article in Journal/Newspaper Antarc* Antarctic Ice Shelf Ross Ice Shelf Victoria Land IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) Antarctic Victoria Land Ross Ice Shelf Tarn Flat ENVELOPE(162.500,162.500,-75.067,-75.067) Microorganisms 7 9 333 |
institution |
Open Polar |
collection |
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria) |
op_collection_id |
ftuninsubriairis |
language |
English |
topic |
Brine pocket Hyperthermophile Metabolic potential Methanogen Sulphur-reducing bacteria |
spellingShingle |
Brine pocket Hyperthermophile Metabolic potential Methanogen Sulphur-reducing bacteria Papale M. Lo Giudice A. Conte A. Rizzo C. Rappazzo A. C. Maimone G. Caruso G. La Ferla R. Azzaro M. Gugliandolo C. Paranhos R. Cabral A. S. Spica V. R. Guglielmin M. Microbial assemblages in pressurized antarctic brine pockets (Tarn flat, northern Victoria land): A hotspot of biodiversity and activity |
topic_facet |
Brine pocket Hyperthermophile Metabolic potential Methanogen Sulphur-reducing bacteria |
description |
Two distinct pressurized hypersaline brine pockets (named TF4 and TF5), separated by a thin ice layer, were detected below an ice-sealed Antarctic lake. Prokaryotic (bacterial and archaeal) diversity, abundances (including virus-like particles) and metabolic profiles were investigated by an integrated approach, including traditional and new-generation methods. Although similar diversity indices were computed for both Bacteria and Archaea, distinct bacterial and archaeal assemblages were observed. Bacteroidetes and Gammaproteobacteria were more abundant in the shallowest brine pocket, TF4, and Deltaproteobacteria, mainly represented by versatile sulphate-reducing bacteria, dominated in the deepest, TF5. The detection of sulphate-reducing bacteria and methanogenic Archaea likely reflects the presence of a distinct synthrophic consortium in TF5. Surprisingly, members assigned to hyperthermophilic Crenarchaeota and Euryarchaeota were common to both brines, indicating that these cold habitats host the most thermally tolerant Archaea. The patterns of microbial communities were different, coherently with the observed microbiological diversity between TF4 and TF5 brines. Both the influence exerted by upward movement of saline brines from a sub-surface anoxic system and the possible occurrence of an ancient ice remnant from the Ross Ice Shelf were the likely main factors shaping the microbial communities. |
author2 |
Papale, M. Lo Giudice, A. Conte, A. Rizzo, C. Rappazzo, A. C. Maimone, G. Caruso, G. La Ferla, R. Azzaro, M. Gugliandolo, C. Paranhos, R. Cabral, A. S. Spica, V. R. Guglielmin, M. |
format |
Article in Journal/Newspaper |
author |
Papale M. Lo Giudice A. Conte A. Rizzo C. Rappazzo A. C. Maimone G. Caruso G. La Ferla R. Azzaro M. Gugliandolo C. Paranhos R. Cabral A. S. Spica V. R. Guglielmin M. |
author_facet |
Papale M. Lo Giudice A. Conte A. Rizzo C. Rappazzo A. C. Maimone G. Caruso G. La Ferla R. Azzaro M. Gugliandolo C. Paranhos R. Cabral A. S. Spica V. R. Guglielmin M. |
author_sort |
Papale M. |
title |
Microbial assemblages in pressurized antarctic brine pockets (Tarn flat, northern Victoria land): A hotspot of biodiversity and activity |
title_short |
Microbial assemblages in pressurized antarctic brine pockets (Tarn flat, northern Victoria land): A hotspot of biodiversity and activity |
title_full |
Microbial assemblages in pressurized antarctic brine pockets (Tarn flat, northern Victoria land): A hotspot of biodiversity and activity |
title_fullStr |
Microbial assemblages in pressurized antarctic brine pockets (Tarn flat, northern Victoria land): A hotspot of biodiversity and activity |
title_full_unstemmed |
Microbial assemblages in pressurized antarctic brine pockets (Tarn flat, northern Victoria land): A hotspot of biodiversity and activity |
title_sort |
microbial assemblages in pressurized antarctic brine pockets (tarn flat, northern victoria land): a hotspot of biodiversity and activity |
publishDate |
2019 |
url |
https://hdl.handle.net/11383/2152831 https://doi.org/10.3390/microorganisms7090333 |
long_lat |
ENVELOPE(162.500,162.500,-75.067,-75.067) |
geographic |
Antarctic Victoria Land Ross Ice Shelf Tarn Flat |
geographic_facet |
Antarctic Victoria Land Ross Ice Shelf Tarn Flat |
genre |
Antarc* Antarctic Ice Shelf Ross Ice Shelf Victoria Land |
genre_facet |
Antarc* Antarctic Ice Shelf Ross Ice Shelf Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/31505750 info:eu-repo/semantics/altIdentifier/wos/WOS:000489131300060 volume:7 issue:9 firstpage:1 lastpage:25 numberofpages:25 journal:MICROORGANISMS https://hdl.handle.net/11383/2152831 doi:10.3390/microorganisms7090333 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85074267226 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/microorganisms7090333 |
container_title |
Microorganisms |
container_volume |
7 |
container_issue |
9 |
container_start_page |
333 |
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1796299822055030784 |