Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils

High-latitude soils are warming rapidly due to climate change, raising concerns about long-term impacts on nitrogen (N) and carbon (C) cycling. Here, we investigate how decadal soil warming affects microbial N transformations in subarctic grasslands using natural geothermal gradients with soil tempe...

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Autores: Zevenhuizen, Ana Leticia|||0009-0009-2821-1006, Richter, Andreas|||0000-0003-3282-4808, Fuchslueger, Lucia|||0000-0002-9615-4439, Prommer, Judith|||0000-0002-2327-7067, Janssens, Ivan|||0000-0002-5705-1787, Verbrigghe, Niel|||0000-0002-8326-8074, Peñuelas, Josep|||0000-0002-7215-0150, Sigurdsson, Bjarni D.|||0000-0002-4784-5233, Marañón Jiménez, Sara|||0000-0001-9786-3977
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:324770
Acceso en línea:https://ddd.uab.cat/record/324770
https://dx.doi.org/urn:doi:10.1111/gcb.70673
Access Level:acceso abierto
Palabra clave:Carbon and nitrogen losses
Climate change
High-latitude ecosystems
Plant-soil interactions
Soil microorganisms
Soil warming
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spelling Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited SoilsZevenhuizen, Ana Leticia|||0009-0009-2821-1006Richter, Andreas|||0000-0003-3282-4808Fuchslueger, Lucia|||0000-0002-9615-4439Prommer, Judith|||0000-0002-2327-7067Janssens, Ivan|||0000-0002-5705-1787Verbrigghe, Niel|||0000-0002-8326-8074Peñuelas, Josep|||0000-0002-7215-0150Sigurdsson, Bjarni D.|||0000-0002-4784-5233Marañón Jiménez, Sara|||0000-0001-9786-3977Carbon and nitrogen lossesClimate changeHigh-latitude ecosystemsPlant-soil interactionsSoil microorganismsSoil warmingHigh-latitude soils are warming rapidly due to climate change, raising concerns about long-term impacts on nitrogen (N) and carbon (C) cycling. Here, we investigate how decadal soil warming affects microbial N transformations in subarctic grasslands using natural geothermal gradients with soil temperatures ranging from ambient to +12.3°C. Seasonal measurements of N-pools and gross N transformation rates-including the production and uptake of amino acids, ammonium, and nitrate-were used to characterize microbial responses across warming intensities and time. Warming enhanced microbial turnover of amino acids by accelerating both gross amino acid production and uptake, while net depolymerization remained unchanged. In contrast, ammonium production remained stable, but its microbial uptake increased significantly with temperature. These decoupled responses suggest a microbial shift toward preferential use of organic N sources under warming, likely driven by reduced soil C availability. This strategy provides a dual source of C and N, enabling microbes to sustain high metabolic activity while limiting additional N losses. Supporting this, total soil N stocks declined early in the warming period-by 0.11 tons of nitrogen per hectare per degree Celsius over 5 years-but remained stable thereafter, indicating a transition toward more conservative microbial N cycling. Together, these findings reveal that long-term warming restructures microbial N use strategies, favoring tight organic N recycling and mineral N conservation. These physiological adjustments may buffer N losses under future warming and should be integrated into models predicting high-latitude ecosystem responses to climate change. 22025-01-0120252025-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/324770https://dx.doi.org/urn:doi:10.1111/gcb.70673reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengAgencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2021-129081OA-I00European Commission https://doi.org/10.13039/501100000780 676108Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 PRE2022-101956open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:3247702026-06-06T12:50:31Z
dc.title.none.fl_str_mv Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils
title Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils
spellingShingle Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils
Zevenhuizen, Ana Leticia|||0009-0009-2821-1006
Carbon and nitrogen losses
Climate change
High-latitude ecosystems
Plant-soil interactions
Soil microorganisms
Soil warming
title_short Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils
title_full Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils
title_fullStr Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils
title_full_unstemmed Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils
title_sort Microbial Nitrogen Cycling Becomes Conservative and Resilient to Long-Term Warming in High-Latitude Carbon-Limited Soils
dc.creator.none.fl_str_mv Zevenhuizen, Ana Leticia|||0009-0009-2821-1006
Richter, Andreas|||0000-0003-3282-4808
Fuchslueger, Lucia|||0000-0002-9615-4439
Prommer, Judith|||0000-0002-2327-7067
Janssens, Ivan|||0000-0002-5705-1787
Verbrigghe, Niel|||0000-0002-8326-8074
Peñuelas, Josep|||0000-0002-7215-0150
Sigurdsson, Bjarni D.|||0000-0002-4784-5233
Marañón Jiménez, Sara|||0000-0001-9786-3977
author Zevenhuizen, Ana Leticia|||0009-0009-2821-1006
author_facet Zevenhuizen, Ana Leticia|||0009-0009-2821-1006
Richter, Andreas|||0000-0003-3282-4808
Fuchslueger, Lucia|||0000-0002-9615-4439
Prommer, Judith|||0000-0002-2327-7067
Janssens, Ivan|||0000-0002-5705-1787
Verbrigghe, Niel|||0000-0002-8326-8074
Peñuelas, Josep|||0000-0002-7215-0150
Sigurdsson, Bjarni D.|||0000-0002-4784-5233
Marañón Jiménez, Sara|||0000-0001-9786-3977
author_role author
author2 Richter, Andreas|||0000-0003-3282-4808
Fuchslueger, Lucia|||0000-0002-9615-4439
Prommer, Judith|||0000-0002-2327-7067
Janssens, Ivan|||0000-0002-5705-1787
Verbrigghe, Niel|||0000-0002-8326-8074
Peñuelas, Josep|||0000-0002-7215-0150
Sigurdsson, Bjarni D.|||0000-0002-4784-5233
Marañón Jiménez, Sara|||0000-0001-9786-3977
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Carbon and nitrogen losses
Climate change
High-latitude ecosystems
Plant-soil interactions
Soil microorganisms
Soil warming
topic Carbon and nitrogen losses
Climate change
High-latitude ecosystems
Plant-soil interactions
Soil microorganisms
Soil warming
description High-latitude soils are warming rapidly due to climate change, raising concerns about long-term impacts on nitrogen (N) and carbon (C) cycling. Here, we investigate how decadal soil warming affects microbial N transformations in subarctic grasslands using natural geothermal gradients with soil temperatures ranging from ambient to +12.3°C. Seasonal measurements of N-pools and gross N transformation rates-including the production and uptake of amino acids, ammonium, and nitrate-were used to characterize microbial responses across warming intensities and time. Warming enhanced microbial turnover of amino acids by accelerating both gross amino acid production and uptake, while net depolymerization remained unchanged. In contrast, ammonium production remained stable, but its microbial uptake increased significantly with temperature. These decoupled responses suggest a microbial shift toward preferential use of organic N sources under warming, likely driven by reduced soil C availability. This strategy provides a dual source of C and N, enabling microbes to sustain high metabolic activity while limiting additional N losses. Supporting this, total soil N stocks declined early in the warming period-by 0.11 tons of nitrogen per hectare per degree Celsius over 5 years-but remained stable thereafter, indicating a transition toward more conservative microbial N cycling. Together, these findings reveal that long-term warming restructures microbial N use strategies, favoring tight organic N recycling and mineral N conservation. These physiological adjustments may buffer N losses under future warming and should be integrated into models predicting high-latitude ecosystem responses to climate change.
publishDate 2025
dc.date.none.fl_str_mv 2
2025-01-01
2025
2025-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/324770
https://dx.doi.org/urn:doi:10.1111/gcb.70673
url https://ddd.uab.cat/record/324770
https://dx.doi.org/urn:doi:10.1111/gcb.70673
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2021-129081OA-I00
European Commission https://doi.org/10.13039/501100000780 676108
Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 PRE2022-101956
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-nc/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
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