Microbial contribution to post-fire tundra ecosystem recovery over the 21st century
Tundra ecosystems have experienced an increased frequency of fire, and this trend is predicted to continue throughout the 21 st Century. Post-fire recovery is underpinned by complex interactions between microbial functional groups that drive nutrient cycling. Here we use a mechanistic model to demon...
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Online Access: | http://www.osti.gov/servlets/purl/1848071 https://www.osti.gov/biblio/1848071 https://doi.org/10.1038/s43247-022-00356-2 |
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ftosti:oai:osti.gov:1848071 2023-07-30T04:07:20+02:00 Microbial contribution to post-fire tundra ecosystem recovery over the 21st century Bouskill, Nicholas J. Mekonnen, Zelalem Zhu, Qing Grant, Robert Riley, William J. 2022-04-22 application/pdf http://www.osti.gov/servlets/purl/1848071 https://www.osti.gov/biblio/1848071 https://doi.org/10.1038/s43247-022-00356-2 unknown http://www.osti.gov/servlets/purl/1848071 https://www.osti.gov/biblio/1848071 https://doi.org/10.1038/s43247-022-00356-2 doi:10.1038/s43247-022-00356-2 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1038/s43247-022-00356-2 2023-07-11T10:10:31Z Tundra ecosystems have experienced an increased frequency of fire, and this trend is predicted to continue throughout the 21 st Century. Post-fire recovery is underpinned by complex interactions between microbial functional groups that drive nutrient cycling. Here we use a mechanistic model to demonstrate an acceleration of the nitrogen cycle post-fire driven by changes in niche space and microbial competitive dynamics. We show that over the first 5-years post-fire, fast-growing bacterial heterotrophs colonize regions of the soil previously occupied by slower-growing saprotrophic fungi. The bacterial heterotrophs mineralize organic matter, releasing nutrients into the soil. This pathway outweighs new sources of nitrogen and facilitates the recovery of plant productivity. We broadly show here that while consideration of distinct microbial metabolisms related to carbon and nutrient cycling remains rare in terrestrial ecosystem models, they are important when considering the rate of ecosystem recovery post-disturbance and the feedback to soil nutrient cycles on centennial timescales. Other/Unknown Material Tundra SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Communications Earth & Environment 3 1 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Bouskill, Nicholas J. Mekonnen, Zelalem Zhu, Qing Grant, Robert Riley, William J. Microbial contribution to post-fire tundra ecosystem recovery over the 21st century |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Tundra ecosystems have experienced an increased frequency of fire, and this trend is predicted to continue throughout the 21 st Century. Post-fire recovery is underpinned by complex interactions between microbial functional groups that drive nutrient cycling. Here we use a mechanistic model to demonstrate an acceleration of the nitrogen cycle post-fire driven by changes in niche space and microbial competitive dynamics. We show that over the first 5-years post-fire, fast-growing bacterial heterotrophs colonize regions of the soil previously occupied by slower-growing saprotrophic fungi. The bacterial heterotrophs mineralize organic matter, releasing nutrients into the soil. This pathway outweighs new sources of nitrogen and facilitates the recovery of plant productivity. We broadly show here that while consideration of distinct microbial metabolisms related to carbon and nutrient cycling remains rare in terrestrial ecosystem models, they are important when considering the rate of ecosystem recovery post-disturbance and the feedback to soil nutrient cycles on centennial timescales. |
author |
Bouskill, Nicholas J. Mekonnen, Zelalem Zhu, Qing Grant, Robert Riley, William J. |
author_facet |
Bouskill, Nicholas J. Mekonnen, Zelalem Zhu, Qing Grant, Robert Riley, William J. |
author_sort |
Bouskill, Nicholas J. |
title |
Microbial contribution to post-fire tundra ecosystem recovery over the 21st century |
title_short |
Microbial contribution to post-fire tundra ecosystem recovery over the 21st century |
title_full |
Microbial contribution to post-fire tundra ecosystem recovery over the 21st century |
title_fullStr |
Microbial contribution to post-fire tundra ecosystem recovery over the 21st century |
title_full_unstemmed |
Microbial contribution to post-fire tundra ecosystem recovery over the 21st century |
title_sort |
microbial contribution to post-fire tundra ecosystem recovery over the 21st century |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1848071 https://www.osti.gov/biblio/1848071 https://doi.org/10.1038/s43247-022-00356-2 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
http://www.osti.gov/servlets/purl/1848071 https://www.osti.gov/biblio/1848071 https://doi.org/10.1038/s43247-022-00356-2 doi:10.1038/s43247-022-00356-2 |
op_doi |
https://doi.org/10.1038/s43247-022-00356-2 |
container_title |
Communications Earth & Environment |
container_volume |
3 |
container_issue |
1 |
_version_ |
1772820585110306816 |