Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland

We investigated the effects of warming and drought on C and N concentrations, nitrogen use efficiency (NUE), and C and N accumulation in different ecosystem compartments. We conducted a 6-year (1999-2005) field experiment to simulate the climate conditions projected by IPCC models for the coming dec...

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Autores: Sardans i Galobart, Jordi|||0000-0003-2478-0219, Peñuelas, Josep|||0000-0002-7215-0150, Estiarte, Marc|||0000-0003-1176-8480, Prieto, Patricia
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:81175
Acceso en línea:https://ddd.uab.cat/record/81175
https://dx.doi.org/urn:doi:10.1111/j.1365-2486.2008.01656.x
Access Level:acceso abierto
Palabra clave:C/N
Climate change
Dorycnium pentaphyllum
Drought
Erica multiflora
Globularia alypum
Mediterranean shrubland
N
NUE
Warming
Canvi climàtic
Sequera
Matoll mediterrani
Escalfament
Cambio climático
Sequía
Matorral mediterráneo
Calentamiento
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spelling Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrublandSardans i Galobart, Jordi|||0000-0003-2478-0219Peñuelas, Josep|||0000-0002-7215-0150Estiarte, Marc|||0000-0003-1176-8480Prieto, PatriciaC/NClimate changeDorycnium pentaphyllumDroughtErica multifloraGlobularia alypumMediterranean shrublandNNUEWarmingCanvi climàticSequeraMatoll mediterraniEscalfamentCambio climáticoSequíaMatorral mediterráneoCalentamientoWe investigated the effects of warming and drought on C and N concentrations, nitrogen use efficiency (NUE), and C and N accumulation in different ecosystem compartments. We conducted a 6-year (1999-2005) field experiment to simulate the climate conditions projected by IPCC models for the coming decades in a Mediterranean shrubland. We studied the two dominant species, Globularia alypum and Erica multiflora, and an N-fixing species, Dorycnium pentaphyllum, also abundant in this shrubland. Warming (1 °C) decreased N leaf concentrations by 25% and increased N stem concentrations by 40% in G. alypum. Although warming changed the available ammonium in soil in some seasons, it did not increase total soil N contents. Drought (19% average reduction in soil moisture) decreased leaf N concentrations in the two dominant shrub species, E. multiflora and G. alypum by 16% and 19%, respectively, and increased stem N concentrations by 56% and 40%, respectively. Neither warming nor drought changed the leaf N concentrations in the N-fixing species D. pentaphyllum, although warming increased stem N concentration by 9%. In G. alypum, the increase of stem N concentrations contributed to the observed increase of N accumulation in stem biomass in drought treatments with respect to control plots (8 kg N ha-1). Neither warming nor drought changed NUE in the period 1999-2005. Warming increased soil organic C relative to drought. The effects of warming and drought on C and N concentrations, on N accumulation and on leaf/stem N distribution were not the result of dilution or concentration effects produced by changes in biomass accumulation. Other factors such as the changes in soil N availability, photosynthetic capacity, and plant internal C and N remobilization must be involved. These changes which differed depending on the species and the plant tissue show that the climate change projected for the coming decades will have significant effects on the C and N cycle and stoichiometry, with probable implications for ecosystem structure and function, such as changes in plant-herbivore relationships, decomposition rates or community species composition. 22008-01-0120082008-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/81175https://dx.doi.org/urn:doi:10.1111/j.1365-2486.2008.01656.xreponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:811752026-06-06T12:50:31Z
dc.title.none.fl_str_mv Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland
title Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland
spellingShingle Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland
Sardans i Galobart, Jordi|||0000-0003-2478-0219
C/N
Climate change
Dorycnium pentaphyllum
Drought
Erica multiflora
Globularia alypum
Mediterranean shrubland
N
NUE
Warming
Canvi climàtic
Sequera
Matoll mediterrani
Escalfament
Cambio climático
Sequía
Matorral mediterráneo
Calentamiento
title_short Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland
title_full Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland
title_fullStr Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland
title_full_unstemmed Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland
title_sort Warming and drought alter C and N concentration, allocation and accumulation in a Mediterranean shrubland
dc.creator.none.fl_str_mv Sardans i Galobart, Jordi|||0000-0003-2478-0219
Peñuelas, Josep|||0000-0002-7215-0150
Estiarte, Marc|||0000-0003-1176-8480
Prieto, Patricia
author Sardans i Galobart, Jordi|||0000-0003-2478-0219
author_facet Sardans i Galobart, Jordi|||0000-0003-2478-0219
Peñuelas, Josep|||0000-0002-7215-0150
Estiarte, Marc|||0000-0003-1176-8480
Prieto, Patricia
author_role author
author2 Peñuelas, Josep|||0000-0002-7215-0150
Estiarte, Marc|||0000-0003-1176-8480
Prieto, Patricia
author2_role author
author
author
dc.subject.none.fl_str_mv C/N
Climate change
Dorycnium pentaphyllum
Drought
Erica multiflora
Globularia alypum
Mediterranean shrubland
N
NUE
Warming
Canvi climàtic
Sequera
Matoll mediterrani
Escalfament
Cambio climático
Sequía
Matorral mediterráneo
Calentamiento
topic C/N
Climate change
Dorycnium pentaphyllum
Drought
Erica multiflora
Globularia alypum
Mediterranean shrubland
N
NUE
Warming
Canvi climàtic
Sequera
Matoll mediterrani
Escalfament
Cambio climático
Sequía
Matorral mediterráneo
Calentamiento
description We investigated the effects of warming and drought on C and N concentrations, nitrogen use efficiency (NUE), and C and N accumulation in different ecosystem compartments. We conducted a 6-year (1999-2005) field experiment to simulate the climate conditions projected by IPCC models for the coming decades in a Mediterranean shrubland. We studied the two dominant species, Globularia alypum and Erica multiflora, and an N-fixing species, Dorycnium pentaphyllum, also abundant in this shrubland. Warming (1 °C) decreased N leaf concentrations by 25% and increased N stem concentrations by 40% in G. alypum. Although warming changed the available ammonium in soil in some seasons, it did not increase total soil N contents. Drought (19% average reduction in soil moisture) decreased leaf N concentrations in the two dominant shrub species, E. multiflora and G. alypum by 16% and 19%, respectively, and increased stem N concentrations by 56% and 40%, respectively. Neither warming nor drought changed the leaf N concentrations in the N-fixing species D. pentaphyllum, although warming increased stem N concentration by 9%. In G. alypum, the increase of stem N concentrations contributed to the observed increase of N accumulation in stem biomass in drought treatments with respect to control plots (8 kg N ha-1). Neither warming nor drought changed NUE in the period 1999-2005. Warming increased soil organic C relative to drought. The effects of warming and drought on C and N concentrations, on N accumulation and on leaf/stem N distribution were not the result of dilution or concentration effects produced by changes in biomass accumulation. Other factors such as the changes in soil N availability, photosynthetic capacity, and plant internal C and N remobilization must be involved. These changes which differed depending on the species and the plant tissue show that the climate change projected for the coming decades will have significant effects on the C and N cycle and stoichiometry, with probable implications for ecosystem structure and function, such as changes in plant-herbivore relationships, decomposition rates or community species composition.
publishDate 2008
dc.date.none.fl_str_mv 2
2008-01-01
2008
2008-01-01
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/81175
https://dx.doi.org/urn:doi:10.1111/j.1365-2486.2008.01656.x
url https://ddd.uab.cat/record/81175
https://dx.doi.org/urn:doi:10.1111/j.1365-2486.2008.01656.x
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
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://rightsstatements.org/vocab/InC/1.0/
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
repository.mail.fl_str_mv
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