Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network

In river networks, dissolved organic matter (DOM) constitutes the major pool of organic carbon, and plays a key role as energy source and modulator of toxic substances availability. In this thesis, Joan P. Casas-Ruiz and collaborators provide new insights into the controls on DOM processing, and int...

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Detalhes bibliográficos
Autor: Casas Ruiz, Joan Pere
Formato: tesis doctoral
Estado:Versión publicada
Fecha de publicación:2017
País:España
Recursos:CBUC, CESCA
Repositorio:TDR. Tesis Doctorales en Red
OAI Identifier:oai:www.tdx.cat:10803/404280
Acesso em linha:http://hdl.handle.net/10803/404280
http://mediaserver.csuc.cat/tdx/documents/16/26/45/162645259096542734947806447748254412163/
Access Level:acceso abierto
Palavra-chave:Dissolved organic matter
Matèria orgànica dissolta
Materia orgánica disuelta
Carbon cycle
Cicle del carboni
Ciclo del carbono
Dissolved organic carbon
Carboni orgànic dissolt
Carbono orgánico disuelto
Stream
Corrent
Corriente
Drainage network
Xarxa de drenatge
Red de drenaje
Biogeochemistry
Biogeoquímica
504
577
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spelling Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river networkCasas Ruiz, Joan PereDissolved organic matterMatèria orgànica dissoltaMateria orgánica disueltaCarbon cycleCicle del carboniCiclo del carbonoDissolved organic carbonCarboni orgànic dissoltCarbono orgánico disueltoStreamCorrentCorrienteDrainage networkXarxa de drenatgeRed de drenajeBiogeochemistryBiogeoquímica504577In river networks, dissolved organic matter (DOM) constitutes the major pool of organic carbon, and plays a key role as energy source and modulator of toxic substances availability. In this thesis, Joan P. Casas-Ruiz and collaborators provide new insights into the controls on DOM processing, and into how in-stream reactions and changing DOM sources modulate DOM dynamics in river networks. To attain this, the quantity and composition of DOM were evaluated across a river network throughout a full hydrological year. The results compiled in this thesis pose water residence time as the main regulator of DOM processing, while DOM properties as well as nutrient availability determine the net balance of in-stream degradation and production of DOM. A network-scale analysis identifies a pattern of DOM concentration and chemical diversity with maxima in medium-sized rivers, and the same pattern emerges upon analysis of a global data set. On the basis of these results, this thesis proposes a conceptual framework to comprehend and predict the spatiotemporal dynamics of riverine DOMLa matèria orgànica dissolta (DOM) constitueix la major reserva de carboni orgànic en els sistemes fluvials, on també hi juga un paper clau com a font d'energia i modulador de la disponibilitat de substàncies tòxiques. En aquesta tesi, Joan P. Cases-Ruiz i col•laboradors pretenen identificar els controls de processament DOM, i entendre com la combinació de reaccions in situ i canvis en les fonts de DOM modulen les dinàmiques de la DOM fluvial. Per tal d'assolir-ho, es van evaluar la quantitat i composició de la DOM en una xarxa fluvial al llarg d'un any hidrològic complet. Els resultats recopilats en aquesta tesi assenyalen el temps de residència de l'aigua com el principal regulador de processament de la DOM, mentre que les propietats intrínsiques de la DOM, així com la disponibilitat de nutrients determinen el balanç net de degradació i producció de la DOM. Una anàlisi a escala de xarxa fluvial identifica un patró de concentració i diversitat química de la DOM amb màxims en els rius de mida mitjana. En base a aquests resultats, aquesta tesi proposa un marc conceptual per comprendre i predir les dinàmiques espacials i temporals de la DOM fluvialUniversitat de GironaMarcé Romero, RafaelLópez Laseras, Ma. PilarSabater, SergiUniversitat de Girona. Institut Català de Recerca de l'AiguaUniversitat de Girona. Departament de Ciències Ambientals201720172017info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersion152 p.application/pdfapplication/pdfhttp://hdl.handle.net/10803/404280http://mediaserver.csuc.cat/tdx/documents/16/26/45/162645259096542734947806447748254412163/TDX (Tesis Doctorals en Xarxa)reponame:TDR. Tesis Doctorales en Redinstname:CBUC, CESCAInglésL'accés als continguts d'aquesta tesi queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons: http://creativecommons.org/licenses/by-nc/4.0/http://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:www.tdx.cat:10803/4042802026-06-14T12:46:07Z
dc.title.none.fl_str_mv Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
title Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
spellingShingle Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
Casas Ruiz, Joan Pere
Dissolved organic matter
Matèria orgànica dissolta
Materia orgánica disuelta
Carbon cycle
Cicle del carboni
Ciclo del carbono
Dissolved organic carbon
Carboni orgànic dissolt
Carbono orgánico disuelto
Stream
Corrent
Corriente
Drainage network
Xarxa de drenatge
Red de drenaje
Biogeochemistry
Biogeoquímica
504
577
title_short Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
title_full Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
title_fullStr Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
title_full_unstemmed Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
title_sort Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
dc.creator.none.fl_str_mv Casas Ruiz, Joan Pere
author Casas Ruiz, Joan Pere
author_facet Casas Ruiz, Joan Pere
author_role author
dc.contributor.none.fl_str_mv Marcé Romero, Rafael
López Laseras, Ma. Pilar
Sabater, Sergi
Universitat de Girona. Institut Català de Recerca de l'Aigua
Universitat de Girona. Departament de Ciències Ambientals
dc.subject.none.fl_str_mv Dissolved organic matter
Matèria orgànica dissolta
Materia orgánica disuelta
Carbon cycle
Cicle del carboni
Ciclo del carbono
Dissolved organic carbon
Carboni orgànic dissolt
Carbono orgánico disuelto
Stream
Corrent
Corriente
Drainage network
Xarxa de drenatge
Red de drenaje
Biogeochemistry
Biogeoquímica
504
577
topic Dissolved organic matter
Matèria orgànica dissolta
Materia orgánica disuelta
Carbon cycle
Cicle del carboni
Ciclo del carbono
Dissolved organic carbon
Carboni orgànic dissolt
Carbono orgánico disuelto
Stream
Corrent
Corriente
Drainage network
Xarxa de drenatge
Red de drenaje
Biogeochemistry
Biogeoquímica
504
577
description In river networks, dissolved organic matter (DOM) constitutes the major pool of organic carbon, and plays a key role as energy source and modulator of toxic substances availability. In this thesis, Joan P. Casas-Ruiz and collaborators provide new insights into the controls on DOM processing, and into how in-stream reactions and changing DOM sources modulate DOM dynamics in river networks. To attain this, the quantity and composition of DOM were evaluated across a river network throughout a full hydrological year. The results compiled in this thesis pose water residence time as the main regulator of DOM processing, while DOM properties as well as nutrient availability determine the net balance of in-stream degradation and production of DOM. A network-scale analysis identifies a pattern of DOM concentration and chemical diversity with maxima in medium-sized rivers, and the same pattern emerges upon analysis of a global data set. On the basis of these results, this thesis proposes a conceptual framework to comprehend and predict the spatiotemporal dynamics of riverine DOM
publishDate 2017
dc.date.none.fl_str_mv 2017
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
info:eu-repo/semantics/publishedVersion
format doctoralThesis
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10803/404280
http://mediaserver.csuc.cat/tdx/documents/16/26/45/162645259096542734947806447748254412163/
url http://hdl.handle.net/10803/404280
http://mediaserver.csuc.cat/tdx/documents/16/26/45/162645259096542734947806447748254412163/
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 152 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universitat de Girona
publisher.none.fl_str_mv Universitat de Girona
dc.source.none.fl_str_mv TDX (Tesis Doctorals en Xarxa)
reponame:TDR. Tesis Doctorales en Red
instname:CBUC, CESCA
instname_str CBUC, CESCA
reponame_str TDR. Tesis Doctorales en Red
collection TDR. Tesis Doctorales en Red
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869403957030289408
score 15,301603

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