Soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern Alaska
Soil microbial communities play a central role in the cycling of carbon (C) in Arctic tundra ecosystems, which contain a large portion of the global C pool. Climate change predictions for Arctic regions include increased temperature and precipitation (i.e. more snow), resulting in increased winter s...
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ftdoajarticles:oai:doaj.org/article:975989405bb64a81bc8320c6669eeb32 2023-05-15T14:56:39+02:00 Soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern Alaska M. P. Ricketts R. S. Poretsky J. M. Welker M. A. Gonzalez-Meler 2016-09-01T00:00:00Z https://doi.org/10.5194/soil-2-459-2016 https://doaj.org/article/975989405bb64a81bc8320c6669eeb32 EN eng Copernicus Publications http://www.soil-journal.net/2/459/2016/soil-2-459-2016.pdf https://doaj.org/toc/2199-3971 https://doaj.org/toc/2199-398X 2199-3971 2199-398X doi:10.5194/soil-2-459-2016 https://doaj.org/article/975989405bb64a81bc8320c6669eeb32 SOIL, Vol 2, Iss 3, Pp 459-474 (2016) Environmental sciences GE1-350 Geology QE1-996.5 article 2016 ftdoajarticles https://doi.org/10.5194/soil-2-459-2016 2022-12-31T03:27:49Z Soil microbial communities play a central role in the cycling of carbon (C) in Arctic tundra ecosystems, which contain a large portion of the global C pool. Climate change predictions for Arctic regions include increased temperature and precipitation (i.e. more snow), resulting in increased winter soil insulation, increased soil temperature and moisture, and shifting plant community composition. We utilized an 18-year snow fence study site designed to examine the effects of increased winter precipitation on Arctic tundra soil bacterial communities within the context of expected ecosystem response to climate change. Soil was collected from three pre-established treatment zones representing varying degrees of snow accumulation, where deep snow ∼ 100 % and intermediate snow ∼ 50 % increased snowpack relative to the control, and low snow ∼ 25 % decreased snowpack relative to the control. Soil physical properties (temperature, moisture, active layer thaw depth) were measured, and samples were analysed for C concentration, nitrogen (N) concentration, and pH. Soil microbial community DNA was extracted and the 16S rRNA gene was sequenced to reveal phylogenetic community differences between samples and determine how soil bacterial communities might respond (structurally and functionally) to changes in winter precipitation and soil chemistry. We analysed relative abundance changes of the six most abundant phyla (ranging from 82 to 96 % of total detected phyla per sample) and found four (Acidobacteria, Actinobacteria, Verrucomicrobia, and Chloroflexi) responded to deepened snow. All six phyla correlated with at least one of the soil chemical properties (% C, % N, C : N, pH); however, a single predictor was not identified, suggesting that each bacterial phylum responds differently to soil characteristics. Overall, bacterial community structure (beta diversity) was found to be associated with snow accumulation treatment and all soil chemical properties. Bacterial functional potential was inferred using ancestral state ... Article in Journal/Newspaper Arctic Climate change Tundra Alaska Directory of Open Access Journals: DOAJ Articles Arctic SOIL 2 3 459 474 |
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 M. P. Ricketts R. S. Poretsky J. M. Welker M. A. Gonzalez-Meler Soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern Alaska |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Soil microbial communities play a central role in the cycling of carbon (C) in Arctic tundra ecosystems, which contain a large portion of the global C pool. Climate change predictions for Arctic regions include increased temperature and precipitation (i.e. more snow), resulting in increased winter soil insulation, increased soil temperature and moisture, and shifting plant community composition. We utilized an 18-year snow fence study site designed to examine the effects of increased winter precipitation on Arctic tundra soil bacterial communities within the context of expected ecosystem response to climate change. Soil was collected from three pre-established treatment zones representing varying degrees of snow accumulation, where deep snow ∼ 100 % and intermediate snow ∼ 50 % increased snowpack relative to the control, and low snow ∼ 25 % decreased snowpack relative to the control. Soil physical properties (temperature, moisture, active layer thaw depth) were measured, and samples were analysed for C concentration, nitrogen (N) concentration, and pH. Soil microbial community DNA was extracted and the 16S rRNA gene was sequenced to reveal phylogenetic community differences between samples and determine how soil bacterial communities might respond (structurally and functionally) to changes in winter precipitation and soil chemistry. We analysed relative abundance changes of the six most abundant phyla (ranging from 82 to 96 % of total detected phyla per sample) and found four (Acidobacteria, Actinobacteria, Verrucomicrobia, and Chloroflexi) responded to deepened snow. All six phyla correlated with at least one of the soil chemical properties (% C, % N, C : N, pH); however, a single predictor was not identified, suggesting that each bacterial phylum responds differently to soil characteristics. Overall, bacterial community structure (beta diversity) was found to be associated with snow accumulation treatment and all soil chemical properties. Bacterial functional potential was inferred using ancestral state ... |
format |
Article in Journal/Newspaper |
author |
M. P. Ricketts R. S. Poretsky J. M. Welker M. A. Gonzalez-Meler |
author_facet |
M. P. Ricketts R. S. Poretsky J. M. Welker M. A. Gonzalez-Meler |
author_sort |
M. P. Ricketts |
title |
Soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern Alaska |
title_short |
Soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern Alaska |
title_full |
Soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern Alaska |
title_fullStr |
Soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern Alaska |
title_full_unstemmed |
Soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern Alaska |
title_sort |
soil bacterial community and functional shifts in response to altered snowpack in moist acidic tundra of northern alaska |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/soil-2-459-2016 https://doaj.org/article/975989405bb64a81bc8320c6669eeb32 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra Alaska |
genre_facet |
Arctic Climate change Tundra Alaska |
op_source |
SOIL, Vol 2, Iss 3, Pp 459-474 (2016) |
op_relation |
http://www.soil-journal.net/2/459/2016/soil-2-459-2016.pdf https://doaj.org/toc/2199-3971 https://doaj.org/toc/2199-398X 2199-3971 2199-398X doi:10.5194/soil-2-459-2016 https://doaj.org/article/975989405bb64a81bc8320c6669eeb32 |
op_doi |
https://doi.org/10.5194/soil-2-459-2016 |
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459 |
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474 |
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