Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra
Climate change increases the frequency and severity of fire in the Arctic tundra regions. We assessed effects of fire in combination with summer warming on soil biogeochemical N- and P cycles with a focus on mineral N over two years following an experimental fire in a dry heath tundra, West Greenlan...
Published in: | Science of The Total Environment |
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Language: | English |
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2021
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Online Access: | https://curis.ku.dk/portal/da/publications/fire-increases-soil-nitrogen-retention-and-alters-nitrogen-uptake-patterns-among-dominant-shrub-species-in-an-arctic-dry-heath-tundra(ebf9f001-aedb-478c-b36e-1ab9c01b636a).html https://doi.org/10.1016/j.scitotenv.2021.150990 https://curis.ku.dk/ws/files/289321869/1_s2.0_S004896972106068X_main.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/ebf9f001-aedb-478c-b36e-1ab9c01b636a 2024-06-09T07:42:24+00:00 Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra Xu, Wenyi Elberling, Bo Ambus, Per Lennart 2021 application/pdf https://curis.ku.dk/portal/da/publications/fire-increases-soil-nitrogen-retention-and-alters-nitrogen-uptake-patterns-among-dominant-shrub-species-in-an-arctic-dry-heath-tundra(ebf9f001-aedb-478c-b36e-1ab9c01b636a).html https://doi.org/10.1016/j.scitotenv.2021.150990 https://curis.ku.dk/ws/files/289321869/1_s2.0_S004896972106068X_main.pdf eng eng info:eu-repo/semantics/openAccess Xu , W , Elberling , B & Ambus , P L 2021 , ' Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra ' , Science of the Total Environment , vol. 807 , no. Part 3 , 150990 . https://doi.org/10.1016/j.scitotenv.2021.150990 N tracing Microbial biomass phosphorus Shrub cutting Tundra fire Warming article 2021 ftcopenhagenunip https://doi.org/10.1016/j.scitotenv.2021.150990 2024-05-16T11:29:22Z Climate change increases the frequency and severity of fire in the Arctic tundra regions. We assessed effects of fire in combination with summer warming on soil biogeochemical N- and P cycles with a focus on mineral N over two years following an experimental fire in a dry heath tundra, West Greenland. We applied stable isotopes ( 15 NH 4 + -N and 15 NO 3 − -N) to trace the post-fire mineral N pools. The partitioning of 15 N in the bulk soils, soil dissolved organic N (TDN), microbes and plants (roots and leaves) was established. The fire tended to increase microbial P pools by four-fold at both one and two years after the fire. Two years after the fire, the bulk soil 15 N recovery has decreased to 10.4% in unburned plots while relatively high recovery was maintained (30%) in burned plots, suggesting an increase in soil N retention after the fire. The contribution of microbial 15 N recovery to bulk soil 15 N recovery increased from 11.2% at 21 days to 31.5% two years after the fire, suggesting that higher post-fire N retention was due largely to the increased incorporation of N into microbial biomass. Fire also increased 15 N recovery in bulk roots after one and two years, but only under summer warming. This suggests that higher retention of post-fire N can strongly increase the potential for N uptake of recovering plants under a future warmer climate. There was significantly lower 15 N enrichment of Betula nana leaves while higher 15 N enrichment of Vaccinium uliginosum leaves (after three years) in burned than control plots. This shows that fire can alter the N uptake differently among dominant shrub species in this tundra ecosystem, and implies that wildfires may change plant species composition in the longer term. Article in Journal/Newspaper Arctic Arctic Betula nana Climate change Greenland Tundra University of Copenhagen: Research Arctic Greenland Science of The Total Environment 807 150990 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
N tracing Microbial biomass phosphorus Shrub cutting Tundra fire Warming |
spellingShingle |
N tracing Microbial biomass phosphorus Shrub cutting Tundra fire Warming Xu, Wenyi Elberling, Bo Ambus, Per Lennart Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra |
topic_facet |
N tracing Microbial biomass phosphorus Shrub cutting Tundra fire Warming |
description |
Climate change increases the frequency and severity of fire in the Arctic tundra regions. We assessed effects of fire in combination with summer warming on soil biogeochemical N- and P cycles with a focus on mineral N over two years following an experimental fire in a dry heath tundra, West Greenland. We applied stable isotopes ( 15 NH 4 + -N and 15 NO 3 − -N) to trace the post-fire mineral N pools. The partitioning of 15 N in the bulk soils, soil dissolved organic N (TDN), microbes and plants (roots and leaves) was established. The fire tended to increase microbial P pools by four-fold at both one and two years after the fire. Two years after the fire, the bulk soil 15 N recovery has decreased to 10.4% in unburned plots while relatively high recovery was maintained (30%) in burned plots, suggesting an increase in soil N retention after the fire. The contribution of microbial 15 N recovery to bulk soil 15 N recovery increased from 11.2% at 21 days to 31.5% two years after the fire, suggesting that higher post-fire N retention was due largely to the increased incorporation of N into microbial biomass. Fire also increased 15 N recovery in bulk roots after one and two years, but only under summer warming. This suggests that higher retention of post-fire N can strongly increase the potential for N uptake of recovering plants under a future warmer climate. There was significantly lower 15 N enrichment of Betula nana leaves while higher 15 N enrichment of Vaccinium uliginosum leaves (after three years) in burned than control plots. This shows that fire can alter the N uptake differently among dominant shrub species in this tundra ecosystem, and implies that wildfires may change plant species composition in the longer term. |
format |
Article in Journal/Newspaper |
author |
Xu, Wenyi Elberling, Bo Ambus, Per Lennart |
author_facet |
Xu, Wenyi Elberling, Bo Ambus, Per Lennart |
author_sort |
Xu, Wenyi |
title |
Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra |
title_short |
Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra |
title_full |
Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra |
title_fullStr |
Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra |
title_full_unstemmed |
Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra |
title_sort |
fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an arctic dry heath tundra |
publishDate |
2021 |
url |
https://curis.ku.dk/portal/da/publications/fire-increases-soil-nitrogen-retention-and-alters-nitrogen-uptake-patterns-among-dominant-shrub-species-in-an-arctic-dry-heath-tundra(ebf9f001-aedb-478c-b36e-1ab9c01b636a).html https://doi.org/10.1016/j.scitotenv.2021.150990 https://curis.ku.dk/ws/files/289321869/1_s2.0_S004896972106068X_main.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic Betula nana Climate change Greenland Tundra |
genre_facet |
Arctic Arctic Betula nana Climate change Greenland Tundra |
op_source |
Xu , W , Elberling , B & Ambus , P L 2021 , ' Fire increases soil nitrogen retention and alters nitrogen uptake patterns among dominant shrub species in an Arctic dry heath tundra ' , Science of the Total Environment , vol. 807 , no. Part 3 , 150990 . https://doi.org/10.1016/j.scitotenv.2021.150990 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.scitotenv.2021.150990 |
container_title |
Science of The Total Environment |
container_volume |
807 |
container_start_page |
150990 |
_version_ |
1801371283816972288 |