Experimental warming increased soil nitrogen sink in the Tibetan permafrost
In permafrost soil, warming regulates the nitrogen (N) cycle either by stimulating N transformation or by enhancing cryoturbation, the mixture of soil layers due to repeated freeze thaw. Here N isotopic values (N-15) of plants and the soil were investigated in a 7year warming experiment in a permafr...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Online Access: | http://ir.imde.ac.cn/handle/131551/19029 https://doi.org/10.1002/2017JG003827 |
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ftchinacadscimhe:oai:ir.imde.ac.cn:131551/19029 2023-05-15T17:56:05+02:00 Experimental warming increased soil nitrogen sink in the Tibetan permafrost Chang, Ruiying Wang, Genxu Yang, Yuanhe Chen, Xiaopeng 2017 http://ir.imde.ac.cn/handle/131551/19029 https://doi.org/10.1002/2017JG003827 英语 eng AMER GEOPHYSICAL UNION JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES Chang, Ruiying,Wang, Genxu,Yang, Yuanhe,et al. Experimental warming increased soil nitrogen sink in the Tibetan permafrost[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2017,122(7):1870-1879. http://ir.imde.ac.cn/handle/131551/19029 doi:10.1002/2017JG003827 Nitrogen Isotope Permafrost Soil Cryoturbation Openness Of n Cycle Soil Aggregate Qinghai-tibetan Plateau Science & Technology Life Sciences & Biomedicine Physical Sciences Environmental Sciences & Ecology Geology POWER-PLANT ACCIDENT FOREST SOIL ALPINE MEADOW THAWING PERMAFROST LITTER ADDITION GRASSLAND SOILS ORGANIC-CARBON CLIMATE-CHANGE PLATEAU ECOSYSTEM Environmental Sciences Geosciences Multidisciplinary Article 期刊论文 2017 ftchinacadscimhe https://doi.org/10.1002/2017JG003827 2022-12-19T18:20:15Z In permafrost soil, warming regulates the nitrogen (N) cycle either by stimulating N transformation or by enhancing cryoturbation, the mixture of soil layers due to repeated freeze thaw. Here N isotopic values (N-15) of plants and the soil were investigated in a 7year warming experiment in a permafrost-affected alpine meadow on the Qinghai-Tibetan Plateau. The results revealed that warming significantly decreased the N-15 in the plant (aboveground and belowground parts) and different soil fractions (clay and silt fraction, aggregate, and bulk soil). The decreased soil N-15 was associated with an increase in soil N stock due to greater N fixation. The incremental N retention in plants and soil mineral-associated fractions from warming resulted in a decrease in soil inorganic N, which constrains the role of nitrification/denitrification in soil N-15, suggesting a restrained rather than an open N cycle. Furthermore, enhanced cryoturbation under warming, identified by a downward redistribution of Cs-137 into deeper layers, promoted N protection from transformation. Overall, the decrease in soil N-15 indicated higher rates of N input through fixation relative to N loss through nitrification and denitrification in permafrost-affected ecosystems under warming conditions. Article in Journal/Newspaper permafrost IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) Journal of Geophysical Research: Biogeosciences 122 7 1870 1879 |
institution |
Open Polar |
collection |
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) |
op_collection_id |
ftchinacadscimhe |
language |
English |
topic |
Nitrogen Isotope Permafrost Soil Cryoturbation Openness Of n Cycle Soil Aggregate Qinghai-tibetan Plateau Science & Technology Life Sciences & Biomedicine Physical Sciences Environmental Sciences & Ecology Geology POWER-PLANT ACCIDENT FOREST SOIL ALPINE MEADOW THAWING PERMAFROST LITTER ADDITION GRASSLAND SOILS ORGANIC-CARBON CLIMATE-CHANGE PLATEAU ECOSYSTEM Environmental Sciences Geosciences Multidisciplinary |
spellingShingle |
Nitrogen Isotope Permafrost Soil Cryoturbation Openness Of n Cycle Soil Aggregate Qinghai-tibetan Plateau Science & Technology Life Sciences & Biomedicine Physical Sciences Environmental Sciences & Ecology Geology POWER-PLANT ACCIDENT FOREST SOIL ALPINE MEADOW THAWING PERMAFROST LITTER ADDITION GRASSLAND SOILS ORGANIC-CARBON CLIMATE-CHANGE PLATEAU ECOSYSTEM Environmental Sciences Geosciences Multidisciplinary Chang, Ruiying Wang, Genxu Yang, Yuanhe Chen, Xiaopeng Experimental warming increased soil nitrogen sink in the Tibetan permafrost |
topic_facet |
Nitrogen Isotope Permafrost Soil Cryoturbation Openness Of n Cycle Soil Aggregate Qinghai-tibetan Plateau Science & Technology Life Sciences & Biomedicine Physical Sciences Environmental Sciences & Ecology Geology POWER-PLANT ACCIDENT FOREST SOIL ALPINE MEADOW THAWING PERMAFROST LITTER ADDITION GRASSLAND SOILS ORGANIC-CARBON CLIMATE-CHANGE PLATEAU ECOSYSTEM Environmental Sciences Geosciences Multidisciplinary |
description |
In permafrost soil, warming regulates the nitrogen (N) cycle either by stimulating N transformation or by enhancing cryoturbation, the mixture of soil layers due to repeated freeze thaw. Here N isotopic values (N-15) of plants and the soil were investigated in a 7year warming experiment in a permafrost-affected alpine meadow on the Qinghai-Tibetan Plateau. The results revealed that warming significantly decreased the N-15 in the plant (aboveground and belowground parts) and different soil fractions (clay and silt fraction, aggregate, and bulk soil). The decreased soil N-15 was associated with an increase in soil N stock due to greater N fixation. The incremental N retention in plants and soil mineral-associated fractions from warming resulted in a decrease in soil inorganic N, which constrains the role of nitrification/denitrification in soil N-15, suggesting a restrained rather than an open N cycle. Furthermore, enhanced cryoturbation under warming, identified by a downward redistribution of Cs-137 into deeper layers, promoted N protection from transformation. Overall, the decrease in soil N-15 indicated higher rates of N input through fixation relative to N loss through nitrification and denitrification in permafrost-affected ecosystems under warming conditions. |
format |
Article in Journal/Newspaper |
author |
Chang, Ruiying Wang, Genxu Yang, Yuanhe Chen, Xiaopeng |
author_facet |
Chang, Ruiying Wang, Genxu Yang, Yuanhe Chen, Xiaopeng |
author_sort |
Chang, Ruiying |
title |
Experimental warming increased soil nitrogen sink in the Tibetan permafrost |
title_short |
Experimental warming increased soil nitrogen sink in the Tibetan permafrost |
title_full |
Experimental warming increased soil nitrogen sink in the Tibetan permafrost |
title_fullStr |
Experimental warming increased soil nitrogen sink in the Tibetan permafrost |
title_full_unstemmed |
Experimental warming increased soil nitrogen sink in the Tibetan permafrost |
title_sort |
experimental warming increased soil nitrogen sink in the tibetan permafrost |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2017 |
url |
http://ir.imde.ac.cn/handle/131551/19029 https://doi.org/10.1002/2017JG003827 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES Chang, Ruiying,Wang, Genxu,Yang, Yuanhe,et al. Experimental warming increased soil nitrogen sink in the Tibetan permafrost[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2017,122(7):1870-1879. http://ir.imde.ac.cn/handle/131551/19029 doi:10.1002/2017JG003827 |
op_doi |
https://doi.org/10.1002/2017JG003827 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
122 |
container_issue |
7 |
container_start_page |
1870 |
op_container_end_page |
1879 |
_version_ |
1766164159533154304 |