Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment
Microbial decomposition of soil organic carbon (SOC) in thawing Arctic permafrost is important in determining greenhouse gas feedbacks of tundra ecosystems to climate. However, the changes in microbial community structure during SOC decomposition are poorly known. Here we examine these changes using...
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ftdoajarticles:oai:doaj.org/article:904d88533b0d49619193cc24a1e99a94 2023-05-15T14:53:31+02:00 Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment Ziming Yang Sihang Yang Joy D. Van Nostrand Jizhong Zhou Wei Fang Qi Qi Yurong Liu Stan D. Wullschleger Liyuan Liang David E. Graham Yunfeng Yang Baohua Gu 2017-09-01T00:00:00Z https://doi.org/10.3389/fmicb.2017.01741 https://doaj.org/article/904d88533b0d49619193cc24a1e99a94 EN eng Frontiers Media S.A. http://journal.frontiersin.org/article/10.3389/fmicb.2017.01741/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2017.01741 https://doaj.org/article/904d88533b0d49619193cc24a1e99a94 Frontiers in Microbiology, Vol 8 (2017) soil organic carbon climate warming microbial community functional genes permafrost Microbiology QR1-502 article 2017 ftdoajarticles https://doi.org/10.3389/fmicb.2017.01741 2022-12-31T05:14:45Z Microbial decomposition of soil organic carbon (SOC) in thawing Arctic permafrost is important in determining greenhouse gas feedbacks of tundra ecosystems to climate. However, the changes in microbial community structure during SOC decomposition are poorly known. Here we examine these changes using frozen soils from Barrow, Alaska, USA, in anoxic microcosm incubation at −2 and 8°C for 122 days. The functional gene array GeoChip was used to determine microbial community structure and the functional genes associated with SOC degradation, methanogenesis, and Fe(III) reduction. Results show that soil incubation after 122 days at 8°C significantly decreased functional gene abundance (P < 0.05) associated with SOC degradation, fermentation, methanogenesis, and iron cycling, particularly in organic-rich soil. These observations correspond well with decreases in labile SOC content (e.g., reducing sugar and ethanol), methane and CO2 production, and Fe(III) reduction. In contrast, the community functional structure was largely unchanged in the −2°C incubation. Soil type (i.e., organic vs. mineral) and the availability of labile SOC were among the most significant factors impacting microbial community structure. These results demonstrate the important roles of microbial community in SOC degradation and support previous findings that SOC in organic-rich Arctic tundra is highly vulnerable to microbial degradation under warming. Article in Journal/Newspaper Arctic Barrow permafrost Tundra Alaska Directory of Open Access Journals: DOAJ Articles Arctic Frontiers in Microbiology 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
soil organic carbon climate warming microbial community functional genes permafrost Microbiology QR1-502 |
spellingShingle |
soil organic carbon climate warming microbial community functional genes permafrost Microbiology QR1-502 Ziming Yang Sihang Yang Joy D. Van Nostrand Jizhong Zhou Wei Fang Qi Qi Yurong Liu Stan D. Wullschleger Liyuan Liang David E. Graham Yunfeng Yang Baohua Gu Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment |
topic_facet |
soil organic carbon climate warming microbial community functional genes permafrost Microbiology QR1-502 |
description |
Microbial decomposition of soil organic carbon (SOC) in thawing Arctic permafrost is important in determining greenhouse gas feedbacks of tundra ecosystems to climate. However, the changes in microbial community structure during SOC decomposition are poorly known. Here we examine these changes using frozen soils from Barrow, Alaska, USA, in anoxic microcosm incubation at −2 and 8°C for 122 days. The functional gene array GeoChip was used to determine microbial community structure and the functional genes associated with SOC degradation, methanogenesis, and Fe(III) reduction. Results show that soil incubation after 122 days at 8°C significantly decreased functional gene abundance (P < 0.05) associated with SOC degradation, fermentation, methanogenesis, and iron cycling, particularly in organic-rich soil. These observations correspond well with decreases in labile SOC content (e.g., reducing sugar and ethanol), methane and CO2 production, and Fe(III) reduction. In contrast, the community functional structure was largely unchanged in the −2°C incubation. Soil type (i.e., organic vs. mineral) and the availability of labile SOC were among the most significant factors impacting microbial community structure. These results demonstrate the important roles of microbial community in SOC degradation and support previous findings that SOC in organic-rich Arctic tundra is highly vulnerable to microbial degradation under warming. |
format |
Article in Journal/Newspaper |
author |
Ziming Yang Sihang Yang Joy D. Van Nostrand Jizhong Zhou Wei Fang Qi Qi Yurong Liu Stan D. Wullschleger Liyuan Liang David E. Graham Yunfeng Yang Baohua Gu |
author_facet |
Ziming Yang Sihang Yang Joy D. Van Nostrand Jizhong Zhou Wei Fang Qi Qi Yurong Liu Stan D. Wullschleger Liyuan Liang David E. Graham Yunfeng Yang Baohua Gu |
author_sort |
Ziming Yang |
title |
Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment |
title_short |
Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment |
title_full |
Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment |
title_fullStr |
Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment |
title_full_unstemmed |
Microbial Community and Functional Gene Changes in Arctic Tundra Soils in a Microcosm Warming Experiment |
title_sort |
microbial community and functional gene changes in arctic tundra soils in a microcosm warming experiment |
publisher |
Frontiers Media S.A. |
publishDate |
2017 |
url |
https://doi.org/10.3389/fmicb.2017.01741 https://doaj.org/article/904d88533b0d49619193cc24a1e99a94 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow permafrost Tundra Alaska |
genre_facet |
Arctic Barrow permafrost Tundra Alaska |
op_source |
Frontiers in Microbiology, Vol 8 (2017) |
op_relation |
http://journal.frontiersin.org/article/10.3389/fmicb.2017.01741/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2017.01741 https://doaj.org/article/904d88533b0d49619193cc24a1e99a94 |
op_doi |
https://doi.org/10.3389/fmicb.2017.01741 |
container_title |
Frontiers in Microbiology |
container_volume |
8 |
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1766325111150870528 |