Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack
The Tibetan Plateau harbors the largest number of glaciers outside the polar regions, which are the source of several major rivers in Asia. These glaciers are also major sources of nutrients for downstream ecosystems, while there is a little amount of data available on the nutrient transformation pr...
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ftdoajarticles:oai:doaj.org/article:99d04529975b4bf3b29f69ca2f595fd7 2023-05-15T18:32:26+02:00 Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack Y. Chen K. Liu Y. Liu T. J. Vick-Majors F. Wang M. Ji 2022-04-01T00:00:00Z https://doi.org/10.5194/tc-16-1265-2022 https://doaj.org/article/99d04529975b4bf3b29f69ca2f595fd7 EN eng Copernicus Publications https://tc.copernicus.org/articles/16/1265/2022/tc-16-1265-2022.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-16-1265-2022 1994-0416 1994-0424 https://doaj.org/article/99d04529975b4bf3b29f69ca2f595fd7 The Cryosphere, Vol 16, Pp 1265-1280 (2022) Environmental sciences GE1-350 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/tc-16-1265-2022 2022-12-30T22:03:35Z The Tibetan Plateau harbors the largest number of glaciers outside the polar regions, which are the source of several major rivers in Asia. These glaciers are also major sources of nutrients for downstream ecosystems, while there is a little amount of data available on the nutrient transformation processes on the glacier surface. Here, we monitored the carbon and nitrogen concentration changes in a snowpit following a snowfall in the Dunde Glacier of the Tibetan Plateau. The association of carbon and nitrogen changes with bacterial community dynamics was investigated in the surface and subsurface snow (depth at 0–15 and 15–30 cm, respectively) during a 9 d period. Our results revealed rapid temporal changes in nitrogen (including nitrate and ammonium) and bacterial communities in both surface and subsurface snow. Nitrate and ammonium concentrations increased from 0.44 to 1.15 mg L −1 and 0.18 to 0.24 mg L −1 in the surface snow and decreased from 3.81 to 1.04 and 0.53 to 0.25 mg L −1 in the subsurface snow over time. Therefore, we suggest that the surface snow is not nitrogen-limited, while the subsurface snow is associated with nitrogen consumption processes and is nitrogen-limited. The nitrate concentration co-varied with bacterial diversity, community structure, and the predicted nitrogen fixation and nitrogen assimilation/denitrification-related genes ( narG ), suggesting nitrogen could mediate bacterial community changes. The nitrogen limitation and enriched denitrification-related genes in subsurface snow suggested stronger environmental and biotic filtering than those in surface snow, which may explain the lower bacterial diversity, more pronounced community temporal changes, and stronger biotic interactions. Collectively, these findings advance our understanding of bacterial community variations and bacterial interactions after snow deposition and provide a possible biological explanation for nitrogen dynamics in snow. Article in Journal/Newspaper The Cryosphere Directory of Open Access Journals: DOAJ Articles The Cryosphere 16 4 1265 1280 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 Y. Chen K. Liu Y. Liu T. J. Vick-Majors F. Wang M. Ji Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The Tibetan Plateau harbors the largest number of glaciers outside the polar regions, which are the source of several major rivers in Asia. These glaciers are also major sources of nutrients for downstream ecosystems, while there is a little amount of data available on the nutrient transformation processes on the glacier surface. Here, we monitored the carbon and nitrogen concentration changes in a snowpit following a snowfall in the Dunde Glacier of the Tibetan Plateau. The association of carbon and nitrogen changes with bacterial community dynamics was investigated in the surface and subsurface snow (depth at 0–15 and 15–30 cm, respectively) during a 9 d period. Our results revealed rapid temporal changes in nitrogen (including nitrate and ammonium) and bacterial communities in both surface and subsurface snow. Nitrate and ammonium concentrations increased from 0.44 to 1.15 mg L −1 and 0.18 to 0.24 mg L −1 in the surface snow and decreased from 3.81 to 1.04 and 0.53 to 0.25 mg L −1 in the subsurface snow over time. Therefore, we suggest that the surface snow is not nitrogen-limited, while the subsurface snow is associated with nitrogen consumption processes and is nitrogen-limited. The nitrate concentration co-varied with bacterial diversity, community structure, and the predicted nitrogen fixation and nitrogen assimilation/denitrification-related genes ( narG ), suggesting nitrogen could mediate bacterial community changes. The nitrogen limitation and enriched denitrification-related genes in subsurface snow suggested stronger environmental and biotic filtering than those in surface snow, which may explain the lower bacterial diversity, more pronounced community temporal changes, and stronger biotic interactions. Collectively, these findings advance our understanding of bacterial community variations and bacterial interactions after snow deposition and provide a possible biological explanation for nitrogen dynamics in snow. |
format |
Article in Journal/Newspaper |
author |
Y. Chen K. Liu Y. Liu T. J. Vick-Majors F. Wang M. Ji |
author_facet |
Y. Chen K. Liu Y. Liu T. J. Vick-Majors F. Wang M. Ji |
author_sort |
Y. Chen |
title |
Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack |
title_short |
Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack |
title_full |
Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack |
title_fullStr |
Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack |
title_full_unstemmed |
Temporal variation of bacterial community and nutrients in Tibetan glacier snowpack |
title_sort |
temporal variation of bacterial community and nutrients in tibetan glacier snowpack |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-1265-2022 https://doaj.org/article/99d04529975b4bf3b29f69ca2f595fd7 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 16, Pp 1265-1280 (2022) |
op_relation |
https://tc.copernicus.org/articles/16/1265/2022/tc-16-1265-2022.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-16-1265-2022 1994-0416 1994-0424 https://doaj.org/article/99d04529975b4bf3b29f69ca2f595fd7 |
op_doi |
https://doi.org/10.5194/tc-16-1265-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
4 |
container_start_page |
1265 |
op_container_end_page |
1280 |
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1766216551008043008 |