Long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils
Abstract Arctic air temperatures are expected to rise significantly over the next century. Experimental warming of arctic tundra has been shown to increase plant productivity and cause community shifts and may also alter microbial community structure. Hence, the objective of this study was to determ...
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Language: | English |
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Oxford University Press (OUP)
2008
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Online Access: | http://dx.doi.org/10.1038/ismej.2008.52 http://www.nature.com/articles/ismej200852.pdf http://www.nature.com/articles/ismej200852 https://academic.oup.com/ismej/article-pdf/2/9/982/56442248/41396_2008_article_bfismej200852.pdf |
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croxfordunivpr:10.1038/ismej.2008.52 2024-10-06T13:45:54+00:00 Long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils Walker, Jennifer K M Egger, Keith N Henry, Gregory H R 2008 http://dx.doi.org/10.1038/ismej.2008.52 http://www.nature.com/articles/ismej200852.pdf http://www.nature.com/articles/ismej200852 https://academic.oup.com/ismej/article-pdf/2/9/982/56442248/41396_2008_article_bfismej200852.pdf en eng Oxford University Press (OUP) https://academic.oup.com/pages/standard-publication-reuse-rights The ISME Journal volume 2, issue 9, page 982-995 ISSN 1751-7362 1751-7370 journal-article 2008 croxfordunivpr https://doi.org/10.1038/ismej.2008.52 2024-09-10T04:15:26Z Abstract Arctic air temperatures are expected to rise significantly over the next century. Experimental warming of arctic tundra has been shown to increase plant productivity and cause community shifts and may also alter microbial community structure. Hence, the objective of this study was to determine whether experimental warming caused shifts in soil microbial communities by measuring changes in the frequency, relative abundance and/or richness of nosZ and nifH genotypes. Five sites at a high arctic coastal lowland were subjected to a 13-year warming experiment using open-top chambers (OTCs). Sites differed by dominant plant community, soil parent material and/or moisture regimen. Six soil cores were collected from each of four replicate OTC and ambient plots at each site and subdivided into upper and lower samples. Differences in frequency and relative abundance of terminal restriction fragments were assessed graphically by two-way cluster analysis and tested statistically with permutational multivariate analysis of variance (ANOVA). Genotypic richness was compared using factorial ANOVA. The genotype frequency, relative abundance and genotype richness of both nosZ and nifH communities differed significantly by site, and by OTC treatment and/or depth at some sites. The site that showed the most pronounced treatment effect was a wet sedge meadow, where community structure and genotype richness of both nosZ and nifH were significantly affected by warming. Although warming was an important factor affecting these communities at some sites at this high arctic lowland, overall, site factors were the main determinants of community structure. Article in Journal/Newspaper Arctic Tundra Oxford University Press Arctic The ISME Journal 2 9 982 995 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Arctic air temperatures are expected to rise significantly over the next century. Experimental warming of arctic tundra has been shown to increase plant productivity and cause community shifts and may also alter microbial community structure. Hence, the objective of this study was to determine whether experimental warming caused shifts in soil microbial communities by measuring changes in the frequency, relative abundance and/or richness of nosZ and nifH genotypes. Five sites at a high arctic coastal lowland were subjected to a 13-year warming experiment using open-top chambers (OTCs). Sites differed by dominant plant community, soil parent material and/or moisture regimen. Six soil cores were collected from each of four replicate OTC and ambient plots at each site and subdivided into upper and lower samples. Differences in frequency and relative abundance of terminal restriction fragments were assessed graphically by two-way cluster analysis and tested statistically with permutational multivariate analysis of variance (ANOVA). Genotypic richness was compared using factorial ANOVA. The genotype frequency, relative abundance and genotype richness of both nosZ and nifH communities differed significantly by site, and by OTC treatment and/or depth at some sites. The site that showed the most pronounced treatment effect was a wet sedge meadow, where community structure and genotype richness of both nosZ and nifH were significantly affected by warming. Although warming was an important factor affecting these communities at some sites at this high arctic lowland, overall, site factors were the main determinants of community structure. |
format |
Article in Journal/Newspaper |
author |
Walker, Jennifer K M Egger, Keith N Henry, Gregory H R |
spellingShingle |
Walker, Jennifer K M Egger, Keith N Henry, Gregory H R Long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils |
author_facet |
Walker, Jennifer K M Egger, Keith N Henry, Gregory H R |
author_sort |
Walker, Jennifer K M |
title |
Long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils |
title_short |
Long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils |
title_full |
Long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils |
title_fullStr |
Long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils |
title_full_unstemmed |
Long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils |
title_sort |
long-term experimental warming alters nitrogen-cycling communities but site factors remain the primary drivers of community structure in high arctic tundra soils |
publisher |
Oxford University Press (OUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1038/ismej.2008.52 http://www.nature.com/articles/ismej200852.pdf http://www.nature.com/articles/ismej200852 https://academic.oup.com/ismej/article-pdf/2/9/982/56442248/41396_2008_article_bfismej200852.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
The ISME Journal volume 2, issue 9, page 982-995 ISSN 1751-7362 1751-7370 |
op_rights |
https://academic.oup.com/pages/standard-publication-reuse-rights |
op_doi |
https://doi.org/10.1038/ismej.2008.52 |
container_title |
The ISME Journal |
container_volume |
2 |
container_issue |
9 |
container_start_page |
982 |
op_container_end_page |
995 |
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1812174240361742336 |