Impact of in situ solar irradiation on snow bacterial communities and functional potential
Polar regions are increasingly exposed to ultraviolet light due to ozone depletion. Snowpacks contain photochemically-active particles that, when irradiated, can lead to the production and accumulation of reactive species that can induce oxidative stress on snow microorganisms. This could generate a...
Published in: | FEMS Microbiology Ecology |
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5016280 2023-08-20T04:08:51+02:00 Impact of in situ solar irradiation on snow bacterial communities and functional potential Sanchez-Cid, C. Keuschnig, C. Vogel, T. Larose, C. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016280 unknown info:eu-repo/semantics/altIdentifier/doi/10.1093/femsec/fiad042 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016280 FEMS Microbiology Ecology info:eu-repo/semantics/article 2023 ftgfzpotsdam https://doi.org/10.1093/femsec/fiad042 2023-07-30T23:40:44Z Polar regions are increasingly exposed to ultraviolet light due to ozone depletion. Snowpacks contain photochemically-active particles that, when irradiated, can lead to the production and accumulation of reactive species that can induce oxidative stress on snow microorganisms. This could generate a selective pressure on snowpack bacteria. In this study, snow microcosms were buried in a snowpack at Ny-Ålesund (Svalbard), either exposed to solar irradiation or incubated in the dark for 10 days, and the bacterial response to solar irradiation was evaluated in situ using a metagenomics approach. Solar irradiation induced a significant decrease of bacterial abundance and richness. Genes involved in glutathione synthesis, sulfur metabolism and multidrug efflux were significantly enriched in the light, whereas genes related to cell wall assembly and nutrient uptake were more abundant in the dark. This is the first study demonstrating the response of snow bacterial communities to solar irradiation in situ and providing insights into the mechanisms involved. Our research shows that polar sun irradiation is sufficiently intense to impose a selective pressure on snow bacteria and supports the concern that increased ultraviolet exposure due to anthropogenic activities and climatic change could drive critical changes in the structure and functioning of snow bacterial communities. Article in Journal/Newspaper Ny Ålesund Ny-Ålesund Svalbard GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Ny-Ålesund Svalbard FEMS Microbiology Ecology |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
Polar regions are increasingly exposed to ultraviolet light due to ozone depletion. Snowpacks contain photochemically-active particles that, when irradiated, can lead to the production and accumulation of reactive species that can induce oxidative stress on snow microorganisms. This could generate a selective pressure on snowpack bacteria. In this study, snow microcosms were buried in a snowpack at Ny-Ålesund (Svalbard), either exposed to solar irradiation or incubated in the dark for 10 days, and the bacterial response to solar irradiation was evaluated in situ using a metagenomics approach. Solar irradiation induced a significant decrease of bacterial abundance and richness. Genes involved in glutathione synthesis, sulfur metabolism and multidrug efflux were significantly enriched in the light, whereas genes related to cell wall assembly and nutrient uptake were more abundant in the dark. This is the first study demonstrating the response of snow bacterial communities to solar irradiation in situ and providing insights into the mechanisms involved. Our research shows that polar sun irradiation is sufficiently intense to impose a selective pressure on snow bacteria and supports the concern that increased ultraviolet exposure due to anthropogenic activities and climatic change could drive critical changes in the structure and functioning of snow bacterial communities. |
format |
Article in Journal/Newspaper |
author |
Sanchez-Cid, C. Keuschnig, C. Vogel, T. Larose, C. |
spellingShingle |
Sanchez-Cid, C. Keuschnig, C. Vogel, T. Larose, C. Impact of in situ solar irradiation on snow bacterial communities and functional potential |
author_facet |
Sanchez-Cid, C. Keuschnig, C. Vogel, T. Larose, C. |
author_sort |
Sanchez-Cid, C. |
title |
Impact of in situ solar irradiation on snow bacterial communities and functional potential |
title_short |
Impact of in situ solar irradiation on snow bacterial communities and functional potential |
title_full |
Impact of in situ solar irradiation on snow bacterial communities and functional potential |
title_fullStr |
Impact of in situ solar irradiation on snow bacterial communities and functional potential |
title_full_unstemmed |
Impact of in situ solar irradiation on snow bacterial communities and functional potential |
title_sort |
impact of in situ solar irradiation on snow bacterial communities and functional potential |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016280 |
geographic |
Ny-Ålesund Svalbard |
geographic_facet |
Ny-Ålesund Svalbard |
genre |
Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Ny Ålesund Ny-Ålesund Svalbard |
op_source |
FEMS Microbiology Ecology |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/femsec/fiad042 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016280 |
op_doi |
https://doi.org/10.1093/femsec/fiad042 |
container_title |
FEMS Microbiology Ecology |
_version_ |
1774721409030815744 |