Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P

Intensification of droughts may aggravate the generally low capacity of Mediterranean soils to store C and nutrients and induce soil C:N:P stoichiometric imbalances through its impact on soil microbial biomass and activity. Soil microbes may nonetheless have different responses to seasonal and chron...

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Autores: Marañón Jiménez, Sara|||0000-0001-9786-3977, Asensio, Dolores|||0000-0002-7622-1200, Sardans i Galobart, Jordi|||0000-0003-2478-0219, Zuccarini, Paolo|||0000-0001-6717-9568, Ogaya Inurrigarro, Romà|||0000-0003-4927-8479, Mattana, Stefania|||0000-0001-8427-8816, Peñuelas, Josep|||0000-0002-7215-0150
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:250609
Acceso en línea:https://ddd.uab.cat/record/250609
https://dx.doi.org/urn:doi:10.1016/j.soilbio.2021.108515
Access Level:acceso abierto
Palabra clave:Drought stress
Microbial nutrients
Microbial osmolytes
Soil enzymes
Soil nutrients
Water limitation
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spelling Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain PMarañón Jiménez, Sara|||0000-0001-9786-3977Asensio, Dolores|||0000-0002-7622-1200Sardans i Galobart, Jordi|||0000-0003-2478-0219Zuccarini, Paolo|||0000-0001-6717-9568Ogaya Inurrigarro, Romà|||0000-0003-4927-8479Mattana, Stefania|||0000-0001-8427-8816Peñuelas, Josep|||0000-0002-7215-0150Drought stressMicrobial nutrientsMicrobial osmolytesSoil enzymesSoil nutrientsWater limitationIntensification of droughts may aggravate the generally low capacity of Mediterranean soils to store C and nutrients and induce soil C:N:P stoichiometric imbalances through its impact on soil microbial biomass and activity. Soil microbes may nonetheless have different responses to seasonal and chronic drought, but very few studies investigate long-term drought periods under field conditions. This study compares the effects of seasonal drought versus the impacts of 16 years of chronic experimental drought on microbial biomass and nutrients and assess the implications for soil nutrient availability and biogeochemical functioning in a Mediterranean forest. The chronic drought treatment reduced substantially and persistently microbial biomass C, N and particularly P, probably due to P-sparing community shifts or microbial adaptations. The smaller microbial N pool and lower mineralization activity contributed to the accumulation of C- and N-rich organic compounds in the soil and to a lower availability of mineralized forms of N during the vegetation growing season. As a result, chronic drought conditions may increase the risks of N losses from the plant-soil system in Mediterranean ecosystems. Microbial C:N ratios remained unaltered under chronic drought compared to control, likely associated with the equivalent accumulation of C- and N-rich osmolytes by microbial communities. In contrast, microbial biomass increased its C content relative to N content in response to seasonal drought, but also reduced considerably its N and P pool. Therefore, while microbial P was more sensitive to chronic water stress, microbial N and C were more closely coupled to the seasonal fluctuations of water availability. 22022-01-0120222022-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/250609https://dx.doi.org/urn:doi:10.1016/j.soilbio.2021.108515reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengAgencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2019-110521GB-I00European Commission https://doi.org/10.13039/501100000780 610028Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2017/SGR-1005open 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, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2506092026-06-06T12:50:31Z
dc.title.none.fl_str_mv Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P
title Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P
spellingShingle Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P
Marañón Jiménez, Sara|||0000-0001-9786-3977
Drought stress
Microbial nutrients
Microbial osmolytes
Soil enzymes
Soil nutrients
Water limitation
title_short Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P
title_full Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P
title_fullStr Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P
title_full_unstemmed Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P
title_sort Seasonal drought in Mediterranean soils mainly changes microbial C and N contents whereas chronic drought mainly impairs the capacity of microbes to retain P
dc.creator.none.fl_str_mv Marañón Jiménez, Sara|||0000-0001-9786-3977
Asensio, Dolores|||0000-0002-7622-1200
Sardans i Galobart, Jordi|||0000-0003-2478-0219
Zuccarini, Paolo|||0000-0001-6717-9568
Ogaya Inurrigarro, Romà|||0000-0003-4927-8479
Mattana, Stefania|||0000-0001-8427-8816
Peñuelas, Josep|||0000-0002-7215-0150
author Marañón Jiménez, Sara|||0000-0001-9786-3977
author_facet Marañón Jiménez, Sara|||0000-0001-9786-3977
Asensio, Dolores|||0000-0002-7622-1200
Sardans i Galobart, Jordi|||0000-0003-2478-0219
Zuccarini, Paolo|||0000-0001-6717-9568
Ogaya Inurrigarro, Romà|||0000-0003-4927-8479
Mattana, Stefania|||0000-0001-8427-8816
Peñuelas, Josep|||0000-0002-7215-0150
author_role author
author2 Asensio, Dolores|||0000-0002-7622-1200
Sardans i Galobart, Jordi|||0000-0003-2478-0219
Zuccarini, Paolo|||0000-0001-6717-9568
Ogaya Inurrigarro, Romà|||0000-0003-4927-8479
Mattana, Stefania|||0000-0001-8427-8816
Peñuelas, Josep|||0000-0002-7215-0150
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Drought stress
Microbial nutrients
Microbial osmolytes
Soil enzymes
Soil nutrients
Water limitation
topic Drought stress
Microbial nutrients
Microbial osmolytes
Soil enzymes
Soil nutrients
Water limitation
description Intensification of droughts may aggravate the generally low capacity of Mediterranean soils to store C and nutrients and induce soil C:N:P stoichiometric imbalances through its impact on soil microbial biomass and activity. Soil microbes may nonetheless have different responses to seasonal and chronic drought, but very few studies investigate long-term drought periods under field conditions. This study compares the effects of seasonal drought versus the impacts of 16 years of chronic experimental drought on microbial biomass and nutrients and assess the implications for soil nutrient availability and biogeochemical functioning in a Mediterranean forest. The chronic drought treatment reduced substantially and persistently microbial biomass C, N and particularly P, probably due to P-sparing community shifts or microbial adaptations. The smaller microbial N pool and lower mineralization activity contributed to the accumulation of C- and N-rich organic compounds in the soil and to a lower availability of mineralized forms of N during the vegetation growing season. As a result, chronic drought conditions may increase the risks of N losses from the plant-soil system in Mediterranean ecosystems. Microbial C:N ratios remained unaltered under chronic drought compared to control, likely associated with the equivalent accumulation of C- and N-rich osmolytes by microbial communities. In contrast, microbial biomass increased its C content relative to N content in response to seasonal drought, but also reduced considerably its N and P pool. Therefore, while microbial P was more sensitive to chronic water stress, microbial N and C were more closely coupled to the seasonal fluctuations of water availability.
publishDate 2022
dc.date.none.fl_str_mv 2
2022-01-01
2022
2022-01-01
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/250609
https://dx.doi.org/urn:doi:10.1016/j.soilbio.2021.108515
url https://ddd.uab.cat/record/250609
https://dx.doi.org/urn:doi:10.1016/j.soilbio.2021.108515
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 PID2019-110521GB-I00
European Commission https://doi.org/10.13039/501100000780 610028
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2017/SGR-1005
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by-nc-nd/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-nd/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
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