Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment

Surface water chemistry has changed in response to reduced atmospheric deposition of sulphur and acidity in many regions of Europe and North America. Most of these studies come from acidic or low-alkalinity surface waters under high acidic deposition. Mediterranean climates offer a different biogeoc...

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Autores: Àvila i Castells, Anna|||0000-0002-4137-0839, Rodà, F. (Ferran), 1953-
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:147725
Acceso en línea:https://ddd.uab.cat/record/147725
https://dx.doi.org/urn:doi:10.1016/j.scitotenv.2011.11.062
Access Level:acceso abierto
Palabra clave:Alkalinity
Base cations
Fagus sylvatica
Heathland
Mediterranean
Montseny mountains
Nitrogen
Quercus ilex
Streamwater chemistry
Sulphate
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spelling Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environmentÀvila i Castells, Anna|||0000-0002-4137-0839Rodà, F. (Ferran), 1953-AlkalinityBase cationsFagus sylvaticaHeathlandMediterraneanMontseny mountainsNitrogenQuercus ilexStreamwater chemistrySulphateSurface water chemistry has changed in response to reduced atmospheric deposition of sulphur and acidity in many regions of Europe and North America. Most of these studies come from acidic or low-alkalinity surface waters under high acidic deposition. Mediterranean climates offer a different biogeochemical context, characterised by streamwaters of higher alkalinity and low acid inputs. In this paper, we use surveys of streamwater chemistry conducted in 1981-1984 and again in 2007 in the Montseny natural park (NE Spain) to test whether streamwaters of these well-buffered catchments respond to changes in atmospheric deposition, which has declined for S during the last decades in NE Spain while remaining about stable for nitrogen. The 23 sampled streams drained heathland, beech forests and evergreen oak forests in relatively undisturbed small catchments underlain by silicate bedrock. Bulk deposition of sulphate at Montseny decreased by 54% while nitrate bulk deposition increased (non-significantly) by 30% in this period. Total N deposition is estimated in the range 15-30 kg N ha¯¹ y¯¹ for NE Spain. This is well above threshold values (e.g. 10 kg N ha¯¹ y¯¹) reported as starting nitrogen saturation symptoms in forest ecosystems in Europe. Baseflow sulphate concentrations decreased on average by 47 μeq L¯¹ or 29% of early 1980s concentrations. Baseflow mean nitrate concentrations increased significantly but only from 5.5 to 8.9 μeq L¯¹. Thus, despite decades of high N deposition, these ecosystems appear to be still far from N saturation. Baseflow alkalinity and base cation concentrations increased substantially, probably a combined result of decreased S deposition, enhanced silicate weathering under current higher temperatures, reduced plant cation uptake as vegetation matures, and slightly drier conditions in the survey of 2007. Overall, these well-buffered catchments have shown sizable changes in baseflow chemistry in response to changed atmospheric deposition and other environmental changes. 22012-01-0120122012-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/147725https://dx.doi.org/urn:doi:10.1016/j.scitotenv.2011.11.062reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Educación y Ciencia CGL2005-07543/CLIMinisterio de Ciencia e Innovación https://doi.org/10.13039/501100004837 CGL2009-13188-C03-01Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 CSD2008-00040open 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:1477252026-06-06T12:50:31Z
dc.title.none.fl_str_mv Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment
title Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment
spellingShingle Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment
Àvila i Castells, Anna|||0000-0002-4137-0839
Alkalinity
Base cations
Fagus sylvatica
Heathland
Mediterranean
Montseny mountains
Nitrogen
Quercus ilex
Streamwater chemistry
Sulphate
title_short Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment
title_full Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment
title_fullStr Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment
title_full_unstemmed Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment
title_sort Changes in atmospheric deposition and streamwater chemistry over 25 years in undisturbed catchments in a Mediterranean mountain environment
dc.creator.none.fl_str_mv Àvila i Castells, Anna|||0000-0002-4137-0839
Rodà, F. (Ferran), 1953-
author Àvila i Castells, Anna|||0000-0002-4137-0839
author_facet Àvila i Castells, Anna|||0000-0002-4137-0839
Rodà, F. (Ferran), 1953-
author_role author
author2 Rodà, F. (Ferran), 1953-
author2_role author
dc.subject.none.fl_str_mv Alkalinity
Base cations
Fagus sylvatica
Heathland
Mediterranean
Montseny mountains
Nitrogen
Quercus ilex
Streamwater chemistry
Sulphate
topic Alkalinity
Base cations
Fagus sylvatica
Heathland
Mediterranean
Montseny mountains
Nitrogen
Quercus ilex
Streamwater chemistry
Sulphate
description Surface water chemistry has changed in response to reduced atmospheric deposition of sulphur and acidity in many regions of Europe and North America. Most of these studies come from acidic or low-alkalinity surface waters under high acidic deposition. Mediterranean climates offer a different biogeochemical context, characterised by streamwaters of higher alkalinity and low acid inputs. In this paper, we use surveys of streamwater chemistry conducted in 1981-1984 and again in 2007 in the Montseny natural park (NE Spain) to test whether streamwaters of these well-buffered catchments respond to changes in atmospheric deposition, which has declined for S during the last decades in NE Spain while remaining about stable for nitrogen. The 23 sampled streams drained heathland, beech forests and evergreen oak forests in relatively undisturbed small catchments underlain by silicate bedrock. Bulk deposition of sulphate at Montseny decreased by 54% while nitrate bulk deposition increased (non-significantly) by 30% in this period. Total N deposition is estimated in the range 15-30 kg N ha¯¹ y¯¹ for NE Spain. This is well above threshold values (e.g. 10 kg N ha¯¹ y¯¹) reported as starting nitrogen saturation symptoms in forest ecosystems in Europe. Baseflow sulphate concentrations decreased on average by 47 μeq L¯¹ or 29% of early 1980s concentrations. Baseflow mean nitrate concentrations increased significantly but only from 5.5 to 8.9 μeq L¯¹. Thus, despite decades of high N deposition, these ecosystems appear to be still far from N saturation. Baseflow alkalinity and base cation concentrations increased substantially, probably a combined result of decreased S deposition, enhanced silicate weathering under current higher temperatures, reduced plant cation uptake as vegetation matures, and slightly drier conditions in the survey of 2007. Overall, these well-buffered catchments have shown sizable changes in baseflow chemistry in response to changed atmospheric deposition and other environmental changes.
publishDate 2012
dc.date.none.fl_str_mv 2
2012-01-01
2012
2012-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/147725
https://dx.doi.org/urn:doi:10.1016/j.scitotenv.2011.11.062
url https://ddd.uab.cat/record/147725
https://dx.doi.org/urn:doi:10.1016/j.scitotenv.2011.11.062
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Educación y Ciencia CGL2005-07543/CLI
Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 CGL2009-13188-C03-01
Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 CSD2008-00040
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
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collection Dipòsit Digital de Documents de la UAB
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