Nitrogen balance along a northern boreal forest fire chronosequence
Fire is a major natural disturbance factor in boreal forests, and the frequency of forest fires is predicted to increase due to climate change. Nitrogen (N) is a key determinant of carbon sequestration in boreal forests because the shortage of N limits tree growth. We studied changes in N pools and...
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ftchinacadscimhe:oai:ir.imde.ac.cn:131551/18624 2023-05-15T14:58:12+02:00 Nitrogen balance along a northern boreal forest fire chronosequence Marjo Palviainen Jukka Pumpanen Frank Berninger Kaisa Ritala Baoli Duan Jussi Heinonsalo Hui Sun Egle Köster Kajar Köster 2017 http://ir.imde.ac.cn/handle/131551/18624 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0174720 https://doi.org/10.1371/journal.pone.0174720 英语 eng PLOS ONE Marjo Palviainen,Jukka Pumpanen,Frank Berninger,et al. Nitrogen balance along a northern boreal forest fire chronosequence[J]. PLOS ONE,2017:e0174720. http://ir.imde.ac.cn/handle/131551/18624 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0174720 doi:10.1371/journal.pone.0174720 Scots Pine Norway Spruce Soil Carbon Jack Pine Wildfire Chronosequence Coniferous Forest Nutrient Budgets Interior Alaska Feather Mosses Climate-change 期刊论文 2017 ftchinacadscimhe https://doi.org/10.1371/journal.pone.0174720 2022-12-19T18:20:06Z Fire is a major natural disturbance factor in boreal forests, and the frequency of forest fires is predicted to increase due to climate change. Nitrogen (N) is a key determinant of carbon sequestration in boreal forests because the shortage of N limits tree growth. We studied changes in N pools and fluxes, and the overall N balance across a 155-year non stand replacing fire chronosequence in sub-arctic Pinus sylvestris forests in Finland. Two years after the fire, total ecosystem N pool was 622 kg ha(-1) of which 16% was in the vegetation, 8% in the dead biomass and 76% in the soil. 155 years after the fire, total N pool was 960 kg ha(-1), with 27% in the vegetation, 3% in the dead biomass and 69% in the soil. This implies an annual accumulation rate of 2.28 kg ha(-1) which was distributed equally between soil and biomass. The observed changes in N pools were consistent with the computed N balance +2.11 kg ha(-1) yr(-1) over the 155-year post-fire period. Nitrogen deposition was an important component of the N balance. The biological N fixation increased with succession and constituted 9% of the total N input during the 155 post-fire years. N2O fluxes were negligible (< 0.01 kg ha(-1) yr(-1)) and did not differ among post-fire age classes. The number and intensity of microbial genes involved in N cycling were lower at the site 60 years after fire compared to the youngest and the oldest sites indicating potential differences in soil N cycling processes. The results suggest that in sub-arctic pine forests, the non-stand-replacing, intermediate severity fires decrease considerably N pools in biomass but changes in soil and total ecosystem N pools are slight. Current fire-return interval does not seem to pose a great threat to ecosystem productivity and N status in these sub-arctic forests. Report Arctic Climate change Alaska IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) Arctic Norway PLOS ONE 12 3 e0174720 |
institution |
Open Polar |
collection |
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) |
op_collection_id |
ftchinacadscimhe |
language |
English |
topic |
Scots Pine Norway Spruce Soil Carbon Jack Pine Wildfire Chronosequence Coniferous Forest Nutrient Budgets Interior Alaska Feather Mosses Climate-change |
spellingShingle |
Scots Pine Norway Spruce Soil Carbon Jack Pine Wildfire Chronosequence Coniferous Forest Nutrient Budgets Interior Alaska Feather Mosses Climate-change Marjo Palviainen Jukka Pumpanen Frank Berninger Kaisa Ritala Baoli Duan Jussi Heinonsalo Hui Sun Egle Köster Kajar Köster Nitrogen balance along a northern boreal forest fire chronosequence |
topic_facet |
Scots Pine Norway Spruce Soil Carbon Jack Pine Wildfire Chronosequence Coniferous Forest Nutrient Budgets Interior Alaska Feather Mosses Climate-change |
description |
Fire is a major natural disturbance factor in boreal forests, and the frequency of forest fires is predicted to increase due to climate change. Nitrogen (N) is a key determinant of carbon sequestration in boreal forests because the shortage of N limits tree growth. We studied changes in N pools and fluxes, and the overall N balance across a 155-year non stand replacing fire chronosequence in sub-arctic Pinus sylvestris forests in Finland. Two years after the fire, total ecosystem N pool was 622 kg ha(-1) of which 16% was in the vegetation, 8% in the dead biomass and 76% in the soil. 155 years after the fire, total N pool was 960 kg ha(-1), with 27% in the vegetation, 3% in the dead biomass and 69% in the soil. This implies an annual accumulation rate of 2.28 kg ha(-1) which was distributed equally between soil and biomass. The observed changes in N pools were consistent with the computed N balance +2.11 kg ha(-1) yr(-1) over the 155-year post-fire period. Nitrogen deposition was an important component of the N balance. The biological N fixation increased with succession and constituted 9% of the total N input during the 155 post-fire years. N2O fluxes were negligible (< 0.01 kg ha(-1) yr(-1)) and did not differ among post-fire age classes. The number and intensity of microbial genes involved in N cycling were lower at the site 60 years after fire compared to the youngest and the oldest sites indicating potential differences in soil N cycling processes. The results suggest that in sub-arctic pine forests, the non-stand-replacing, intermediate severity fires decrease considerably N pools in biomass but changes in soil and total ecosystem N pools are slight. Current fire-return interval does not seem to pose a great threat to ecosystem productivity and N status in these sub-arctic forests. |
format |
Report |
author |
Marjo Palviainen Jukka Pumpanen Frank Berninger Kaisa Ritala Baoli Duan Jussi Heinonsalo Hui Sun Egle Köster Kajar Köster |
author_facet |
Marjo Palviainen Jukka Pumpanen Frank Berninger Kaisa Ritala Baoli Duan Jussi Heinonsalo Hui Sun Egle Köster Kajar Köster |
author_sort |
Marjo Palviainen |
title |
Nitrogen balance along a northern boreal forest fire chronosequence |
title_short |
Nitrogen balance along a northern boreal forest fire chronosequence |
title_full |
Nitrogen balance along a northern boreal forest fire chronosequence |
title_fullStr |
Nitrogen balance along a northern boreal forest fire chronosequence |
title_full_unstemmed |
Nitrogen balance along a northern boreal forest fire chronosequence |
title_sort |
nitrogen balance along a northern boreal forest fire chronosequence |
publishDate |
2017 |
url |
http://ir.imde.ac.cn/handle/131551/18624 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0174720 https://doi.org/10.1371/journal.pone.0174720 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Climate change Alaska |
genre_facet |
Arctic Climate change Alaska |
op_relation |
PLOS ONE Marjo Palviainen,Jukka Pumpanen,Frank Berninger,et al. Nitrogen balance along a northern boreal forest fire chronosequence[J]. PLOS ONE,2017:e0174720. http://ir.imde.ac.cn/handle/131551/18624 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0174720 doi:10.1371/journal.pone.0174720 |
op_doi |
https://doi.org/10.1371/journal.pone.0174720 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
3 |
container_start_page |
e0174720 |
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