Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest
Permafrost soils are large reservoirs of potentially labile carbon (C). Understanding the dynamics of C release from these soils requires us to account for the impact of wildfires, which are increasing in frequency as the climate changes. Boreal wildfires contribute to global emission of greenhouse...
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ftcdlib:qt8vb0q9x6 2023-05-15T17:24:01+02:00 Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest Taş, N Prestat, E McFarland, JW Wickland, KP Knight, R Berhe, AA Jorgenson, T Waldrop, MP Jansson, JK 1904 - 1919 2014-01-01 application/pdf http://www.escholarship.org/uc/item/8vb0q9x6 english eng eScholarship, University of California qt8vb0q9x6 http://www.escholarship.org/uc/item/8vb0q9x6 public Taş, N; Prestat, E; McFarland, JW; Wickland, KP; Knight, R; Berhe, AA; et al.(2014). Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest. ISME Journal, 8(9), 1904 - 1919. doi:10.1038/ismej.2014.36. UC Merced: Retrieved from: http://www.escholarship.org/uc/item/8vb0q9x6 article 2014 ftcdlib https://doi.org/10.1038/ismej.2014.36 2018-11-09T23:52:21Z Permafrost soils are large reservoirs of potentially labile carbon (C). Understanding the dynamics of C release from these soils requires us to account for the impact of wildfires, which are increasing in frequency as the climate changes. Boreal wildfires contribute to global emission of greenhouse gases (GHG-CO 2, CH 4 and N 2 O) and indirectly result in the thawing of near-surface permafrost. In this study, we aimed to define the impact of fire on soil microbial communities and metabolic potential for GHG fluxes in samples collected up to 1 m depth from an upland black spruce forest near Nome Creek, Alaska. We measured geochemistry, GHG fluxes, potential soil enzyme activities and microbial community structure via 16SrRNA gene and metagenome sequencing. We found that soil moisture, C content and the potential for respiration were reduced by fire, as were microbial community diversity and metabolic potential. There were shifts in dominance of several microbial community members, including a higher abundance of candidate phylum AD3 after fire. The metagenome data showed that fire had a pervasive impact on genes involved in carbohydrate metabolism, methanogenesis and the nitrogen cycle. Although fire resulted in an immediate release of CO 2 from surface soils, our results suggest that the potential for emission of GHG was ultimately reduced at all soil depths over the longer term. Because of the size of the permafrost C reservoir, these results are crucial for understanding whether fire produces a positive or negative feedback loop contributing to the global C cycle. Article in Journal/Newspaper Nome permafrost Alaska University of California: eScholarship Nome Creek ENVELOPE(-130.853,-130.853,59.783,59.783) The ISME Journal 8 9 1904 1919 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
Permafrost soils are large reservoirs of potentially labile carbon (C). Understanding the dynamics of C release from these soils requires us to account for the impact of wildfires, which are increasing in frequency as the climate changes. Boreal wildfires contribute to global emission of greenhouse gases (GHG-CO 2, CH 4 and N 2 O) and indirectly result in the thawing of near-surface permafrost. In this study, we aimed to define the impact of fire on soil microbial communities and metabolic potential for GHG fluxes in samples collected up to 1 m depth from an upland black spruce forest near Nome Creek, Alaska. We measured geochemistry, GHG fluxes, potential soil enzyme activities and microbial community structure via 16SrRNA gene and metagenome sequencing. We found that soil moisture, C content and the potential for respiration were reduced by fire, as were microbial community diversity and metabolic potential. There were shifts in dominance of several microbial community members, including a higher abundance of candidate phylum AD3 after fire. The metagenome data showed that fire had a pervasive impact on genes involved in carbohydrate metabolism, methanogenesis and the nitrogen cycle. Although fire resulted in an immediate release of CO 2 from surface soils, our results suggest that the potential for emission of GHG was ultimately reduced at all soil depths over the longer term. Because of the size of the permafrost C reservoir, these results are crucial for understanding whether fire produces a positive or negative feedback loop contributing to the global C cycle. |
format |
Article in Journal/Newspaper |
author |
Taş, N Prestat, E McFarland, JW Wickland, KP Knight, R Berhe, AA Jorgenson, T Waldrop, MP Jansson, JK |
spellingShingle |
Taş, N Prestat, E McFarland, JW Wickland, KP Knight, R Berhe, AA Jorgenson, T Waldrop, MP Jansson, JK Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest |
author_facet |
Taş, N Prestat, E McFarland, JW Wickland, KP Knight, R Berhe, AA Jorgenson, T Waldrop, MP Jansson, JK |
author_sort |
Taş, N |
title |
Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest |
title_short |
Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest |
title_full |
Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest |
title_fullStr |
Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest |
title_full_unstemmed |
Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest |
title_sort |
impact of fire on active layer and permafrost microbial communities and metagenomes in an upland alaskan boreal forest |
publisher |
eScholarship, University of California |
publishDate |
2014 |
url |
http://www.escholarship.org/uc/item/8vb0q9x6 |
op_coverage |
1904 - 1919 |
long_lat |
ENVELOPE(-130.853,-130.853,59.783,59.783) |
geographic |
Nome Creek |
geographic_facet |
Nome Creek |
genre |
Nome permafrost Alaska |
genre_facet |
Nome permafrost Alaska |
op_source |
Taş, N; Prestat, E; McFarland, JW; Wickland, KP; Knight, R; Berhe, AA; et al.(2014). Impact of fire on active layer and permafrost microbial communities and metagenomes in an upland Alaskan boreal forest. ISME Journal, 8(9), 1904 - 1919. doi:10.1038/ismej.2014.36. UC Merced: Retrieved from: http://www.escholarship.org/uc/item/8vb0q9x6 |
op_relation |
qt8vb0q9x6 http://www.escholarship.org/uc/item/8vb0q9x6 |
op_rights |
public |
op_doi |
https://doi.org/10.1038/ismej.2014.36 |
container_title |
The ISME Journal |
container_volume |
8 |
container_issue |
9 |
container_start_page |
1904 |
op_container_end_page |
1919 |
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1766114808808079360 |