Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea

Abstract Dissolved organic matter (DOM) plays a key role in global biogeochemical cycles and experiences changes in molecular composition as it undergoes processing. In the semi-closed basins of the oligotrophic Mediterranean Sea, these gradual molecular modifications can be observed in close proxim...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Alba María Martínez-Pérez, Mar Nieto-Cid, Helena Osterholz, Teresa S. Catalá, Isabel Reche, Thorsten Dittmar, Xosé Antón Álvarez-Salgado
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/eb70906578114d2899163ee12d1a677e
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:eb70906578114d2899163ee12d1a677e
record_format	dspace
spelling	oai:doaj.org-article:eb70906578114d2899163ee12d1a677e2021-12-02T11:52:56ZLinking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea10.1038/s41598-017-03735-42045-2322https://doaj.org/article/eb70906578114d2899163ee12d1a677e2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03735-4https://doaj.org/toc/2045-2322Abstract Dissolved organic matter (DOM) plays a key role in global biogeochemical cycles and experiences changes in molecular composition as it undergoes processing. In the semi-closed basins of the oligotrophic Mediterranean Sea, these gradual molecular modifications can be observed in close proximity. In order to extend the spatial resolution of information on DOM molecular composition available from ultrahigh resolution mass spectrometry in this area, we relate this data to optical (fluorescence and absorption spectroscopy) measurements. Covariance between molecular formulae signal intensities and carbon-specific fluorescence intensities was examined by means of Spearman’s rank correlations. Fifty two per cent of the assigned molecular formulae were associated with at least one optical parameter, accounting for 70% of the total mass spectrum signal intensity. Furthermore, we obtained significant multiple linear regressions between optical and intensity-weighted molecular indices. The resulting regression equations were used to estimate molecular parameters such as the double bond equivalent, degradation state and occurrence of unsaturated aliphatic compounds from optical measurements. The statistical linkages between DOM molecular and optical properties illustrate that the simple, rapid and cost-efficient optical spectroscopic measurements provide valuable proxy information on the molecular composition of open ocean marine DOM.Alba María Martínez-PérezMar Nieto-CidHelena OsterholzTeresa S. CataláIsabel RecheThorsten DittmarXosé Antón Álvarez-SalgadoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alba María Martínez-Pérez Mar Nieto-Cid Helena Osterholz Teresa S. Catalá Isabel Reche Thorsten Dittmar Xosé Antón Álvarez-Salgado Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea
description	Abstract Dissolved organic matter (DOM) plays a key role in global biogeochemical cycles and experiences changes in molecular composition as it undergoes processing. In the semi-closed basins of the oligotrophic Mediterranean Sea, these gradual molecular modifications can be observed in close proximity. In order to extend the spatial resolution of information on DOM molecular composition available from ultrahigh resolution mass spectrometry in this area, we relate this data to optical (fluorescence and absorption spectroscopy) measurements. Covariance between molecular formulae signal intensities and carbon-specific fluorescence intensities was examined by means of Spearman’s rank correlations. Fifty two per cent of the assigned molecular formulae were associated with at least one optical parameter, accounting for 70% of the total mass spectrum signal intensity. Furthermore, we obtained significant multiple linear regressions between optical and intensity-weighted molecular indices. The resulting regression equations were used to estimate molecular parameters such as the double bond equivalent, degradation state and occurrence of unsaturated aliphatic compounds from optical measurements. The statistical linkages between DOM molecular and optical properties illustrate that the simple, rapid and cost-efficient optical spectroscopic measurements provide valuable proxy information on the molecular composition of open ocean marine DOM.
format	article
author	Alba María Martínez-Pérez Mar Nieto-Cid Helena Osterholz Teresa S. Catalá Isabel Reche Thorsten Dittmar Xosé Antón Álvarez-Salgado
author_facet	Alba María Martínez-Pérez Mar Nieto-Cid Helena Osterholz Teresa S. Catalá Isabel Reche Thorsten Dittmar Xosé Antón Álvarez-Salgado
author_sort	Alba María Martínez-Pérez
title	Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea
title_short	Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea
title_full	Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea
title_fullStr	Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea
title_full_unstemmed	Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea
title_sort	linking optical and molecular signatures of dissolved organic matter in the mediterranean sea
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/eb70906578114d2899163ee12d1a677e
work_keys_str_mv	AT albamariamartinezperez linkingopticalandmolecularsignaturesofdissolvedorganicmatterinthemediterraneansea AT marnietocid linkingopticalandmolecularsignaturesofdissolvedorganicmatterinthemediterraneansea AT helenaosterholz linkingopticalandmolecularsignaturesofdissolvedorganicmatterinthemediterraneansea AT teresascatala linkingopticalandmolecularsignaturesofdissolvedorganicmatterinthemediterraneansea AT isabelreche linkingopticalandmolecularsignaturesofdissolvedorganicmatterinthemediterraneansea AT thorstendittmar linkingopticalandmolecularsignaturesofdissolvedorganicmatterinthemediterraneansea AT xoseantonalvarezsalgado linkingopticalandmolecularsignaturesofdissolvedorganicmatterinthemediterraneansea
_version_	1718394959607889920

Linking optical and molecular signatures of dissolved organic matter in the Mediterranean Sea

Ejemplares similares