Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada
Boreal forests in permafrost zone store significant quantities of carbon that are readily threatened by increases in fire frequency and temperature due to climate change. Soil carbon is primarily released by microbial decomposition that is sensitive to environmental conditions. Under increasing dist...
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Online Access: | http://hdl.handle.net/10138/317888 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/317888 2024-01-07T09:37:55+01:00 Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada Zhou, Xuan Sun, Hui Sietiö, Outi-Maaria Pumpanen, Jukka Heinonsalo, Jussi Köster, Kajar Berninger, Frank Department of Forest Sciences Institute for Atmospheric and Earth System Research (INAR) Soils and climate change Department of Microbiology Viikki Plant Science Centre (ViPS) Jussi Heinonsalo / Principal Investigator Forest Soil Science Ecosystem processes (INAR Forest Sciences) 2020-07-23T12:08:02Z 11 application/pdf http://hdl.handle.net/10138/317888 eng eng Elsevier Scientific Publ. Co 10.1016/j.apsoil.2020.103713 Zhou , X , Sun , H , Sietiö , O-M , Pumpanen , J , Heinonsalo , J , Köster , K & Berninger , F 2020 , ' Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada ' , Applied Soil Ecology , vol. 156 , 103713 . https://doi.org/10.1016/j.apsoil.2020.103713 ORCID: /0000-0001-8516-1388/work/77845301 ORCID: /0000-0003-1988-5788/work/77846968 ORCID: /0000-0003-0127-9368/work/77847092 143a3162-10af-405c-9838-9a190000468e http://hdl.handle.net/10138/317888 000562675000016 cc_by openAccess info:eu-repo/semantics/openAccess 4112 Forestry 11832 Microbiology and virology GeoChip 5.0K Illumina MiSeq sequencing Soil bacterial community composition Bacterial functional gene structure Canadian boreal forest ORGANIC-MATTER ACTIVE LAYER MICROBIAL DIVERSITY BOREAL FORESTS CLIMATE-CHANGE BURN SEVERITY FIRE CARBON GROWTH FUNGAL Article publishedVersion 2020 ftunivhelsihelda 2023-12-14T00:08:31Z Boreal forests in permafrost zone store significant quantities of carbon that are readily threatened by increases in fire frequency and temperature due to climate change. Soil carbon is primarily released by microbial decomposition that is sensitive to environmental conditions. Under increasing disturbances of wildfire, there is a pressing need to understand interactions between wildfires and microbial communities, thereby to predict soil carbon dynamics. Using Illumina MiSeq sequencing of bacterial 16S rDNA and GeoChip 5.0K, we compared bacterial communities and their potential functions at surface and near-surface permafrost layers across a chronosequence (>100 years) of burned forests in a continuous permafrost zone. Postfire soils in the Yukon and the Northwest Territories, Canada, showed a marked increase in active layer thickness. Our results showed that soil bacterial community compositions and potential functions altered in 3-year postfire forest (Fire3) comparing to the unburned forests. The relative abundance of Ktedonobacteria (Chloroflexi) was higher in Fire3 surface soils, while Alphaproteobacteria and Betaproteobacteria (Proteobacteria) were more abundant in unburned ones. Approximately 37% of the variation in community composition can be explained by abiotic variables, whereas only 2% by biotic variables. Potential functional genes, particularly for carbon degradation and anammox, appeared more frequent in Fire3 than in unburned soils. Variations in functional gene pools were mainly driven by environmental factors (39%) and bacterial communities (20%; at phylum level). Unexpectedly, wildfire solely altered bacterial communities and their functional potentials of the surface layers, not the near-permafrost layers. Overall, the response of bacterial community compositions and functions to wildfire and the environment provides insights to re-evaluate the role of bacteria in decomposition. Peer reviewed Article in Journal/Newspaper Active layer thickness Northwest Territories permafrost Yukon HELDA – University of Helsinki Open Repository Yukon Northwest Territories Canada Applied Soil Ecology 156 103713 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
4112 Forestry 11832 Microbiology and virology GeoChip 5.0K Illumina MiSeq sequencing Soil bacterial community composition Bacterial functional gene structure Canadian boreal forest ORGANIC-MATTER ACTIVE LAYER MICROBIAL DIVERSITY BOREAL FORESTS CLIMATE-CHANGE BURN SEVERITY FIRE CARBON GROWTH FUNGAL |
spellingShingle |
4112 Forestry 11832 Microbiology and virology GeoChip 5.0K Illumina MiSeq sequencing Soil bacterial community composition Bacterial functional gene structure Canadian boreal forest ORGANIC-MATTER ACTIVE LAYER MICROBIAL DIVERSITY BOREAL FORESTS CLIMATE-CHANGE BURN SEVERITY FIRE CARBON GROWTH FUNGAL Zhou, Xuan Sun, Hui Sietiö, Outi-Maaria Pumpanen, Jukka Heinonsalo, Jussi Köster, Kajar Berninger, Frank Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada |
topic_facet |
4112 Forestry 11832 Microbiology and virology GeoChip 5.0K Illumina MiSeq sequencing Soil bacterial community composition Bacterial functional gene structure Canadian boreal forest ORGANIC-MATTER ACTIVE LAYER MICROBIAL DIVERSITY BOREAL FORESTS CLIMATE-CHANGE BURN SEVERITY FIRE CARBON GROWTH FUNGAL |
description |
Boreal forests in permafrost zone store significant quantities of carbon that are readily threatened by increases in fire frequency and temperature due to climate change. Soil carbon is primarily released by microbial decomposition that is sensitive to environmental conditions. Under increasing disturbances of wildfire, there is a pressing need to understand interactions between wildfires and microbial communities, thereby to predict soil carbon dynamics. Using Illumina MiSeq sequencing of bacterial 16S rDNA and GeoChip 5.0K, we compared bacterial communities and their potential functions at surface and near-surface permafrost layers across a chronosequence (>100 years) of burned forests in a continuous permafrost zone. Postfire soils in the Yukon and the Northwest Territories, Canada, showed a marked increase in active layer thickness. Our results showed that soil bacterial community compositions and potential functions altered in 3-year postfire forest (Fire3) comparing to the unburned forests. The relative abundance of Ktedonobacteria (Chloroflexi) was higher in Fire3 surface soils, while Alphaproteobacteria and Betaproteobacteria (Proteobacteria) were more abundant in unburned ones. Approximately 37% of the variation in community composition can be explained by abiotic variables, whereas only 2% by biotic variables. Potential functional genes, particularly for carbon degradation and anammox, appeared more frequent in Fire3 than in unburned soils. Variations in functional gene pools were mainly driven by environmental factors (39%) and bacterial communities (20%; at phylum level). Unexpectedly, wildfire solely altered bacterial communities and their functional potentials of the surface layers, not the near-permafrost layers. Overall, the response of bacterial community compositions and functions to wildfire and the environment provides insights to re-evaluate the role of bacteria in decomposition. Peer reviewed |
author2 |
Department of Forest Sciences Institute for Atmospheric and Earth System Research (INAR) Soils and climate change Department of Microbiology Viikki Plant Science Centre (ViPS) Jussi Heinonsalo / Principal Investigator Forest Soil Science Ecosystem processes (INAR Forest Sciences) |
format |
Article in Journal/Newspaper |
author |
Zhou, Xuan Sun, Hui Sietiö, Outi-Maaria Pumpanen, Jukka Heinonsalo, Jussi Köster, Kajar Berninger, Frank |
author_facet |
Zhou, Xuan Sun, Hui Sietiö, Outi-Maaria Pumpanen, Jukka Heinonsalo, Jussi Köster, Kajar Berninger, Frank |
author_sort |
Zhou, Xuan |
title |
Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada |
title_short |
Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada |
title_full |
Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada |
title_fullStr |
Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada |
title_full_unstemmed |
Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada |
title_sort |
wildfire effects on soil bacterial community and its potential functions in a permafrost region of canada |
publisher |
Elsevier Scientific Publ. Co |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/317888 |
geographic |
Yukon Northwest Territories Canada |
geographic_facet |
Yukon Northwest Territories Canada |
genre |
Active layer thickness Northwest Territories permafrost Yukon |
genre_facet |
Active layer thickness Northwest Territories permafrost Yukon |
op_relation |
10.1016/j.apsoil.2020.103713 Zhou , X , Sun , H , Sietiö , O-M , Pumpanen , J , Heinonsalo , J , Köster , K & Berninger , F 2020 , ' Wildfire effects on soil bacterial community and its potential functions in a permafrost region of Canada ' , Applied Soil Ecology , vol. 156 , 103713 . https://doi.org/10.1016/j.apsoil.2020.103713 ORCID: /0000-0001-8516-1388/work/77845301 ORCID: /0000-0003-1988-5788/work/77846968 ORCID: /0000-0003-0127-9368/work/77847092 143a3162-10af-405c-9838-9a190000468e http://hdl.handle.net/10138/317888 000562675000016 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
Applied Soil Ecology |
container_volume |
156 |
container_start_page |
103713 |
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1787422573929168896 |