Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

Contiene 6 figuras, 2 tablas.

Detalles Bibliográficos
Autores: Kaal, Joeri, Serrano, Oscar, Nierop, Klaas G. J., Schellekens, Judith, Martínez Cortizas, Antonio, Mateo, Miguel Ángel
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/133051
Acceso en línea:http://hdl.handle.net/10261/133051
Access Level:acceso abierto
Palabra clave:Molecular composition
Analytical pyrolysis
Seagrass
Posidonia oceanica
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spelling Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) matKaal, JoeriSerrano, OscarNierop, Klaas G. J.Schellekens, JudithMartínez Cortizas, AntonioMateo, Miguel ÁngelMolecular compositionAnalytical pyrolysisSeagrassPosidonia oceanicaContiene 6 figuras, 2 tablas.Posidonia oceanica forms extensive peat-like deposits (mats) in Mediterranean coastal waters, which have a potential as carbon sinks and archives of environmental change. Nonetheless, the organic chemistry of both P. oceanica plant materials, as well as the environmental and diagenetic effects on the composition of its detritus, is poorly understood. We analyzed plant organs of P. oceanica and the coarse organic matter from a mat core spanning 750 yrs using pyrolysis techniques (PY-GC-MS and THM-GC-MS) to improve our understanding of their molecular properties and their preservation upon mat development. It appeared that leaf sheaths, roots and the outer parts of rhizomes were composed predominantly of phenolic constituents based on p-hydroxybenzoic acid (p-HBA), which is atypical for vascular plants, in addition to carbohydrates and lignin. The inner rhizome and leaf blades had a different composition, with predominance of carbohydrates. The seagrass detritus in the mat was composed mainly of p-HBA phenolic material and carbohydrates, confirming earlier studies showing that the coarse detritus in the mat originates largely from Posidonia sheath, root and rhizome debris. The intermolecular arrangement of the p-HBA remains unclear, as they seem to correspond to ester-bound phenols yet their persistence in the mat attributes them a refractory nature. Variations in molecular composition within the mat are probably associated with diagenetic alteration of P. oceanica detritus, such as the decomposition of minor amounts of fatty acids, chlorophyll and syringyl lignin, and selective preservation of p-HBA relative to carbohydrates. This work lays the foundations for a molecular understanding of carbon storage within the mats and the environmental changes recorded therein.The pyrolysis experiments and J.K. were funded by the project CGL2010-20662 (Plan Nacional de I+D+i, Ministerio de Economía y Competitividad, España) and grant GPC2014/009 (Xunta de Galicia). O.S. was supported by the ECU Faculty Research Grant Scheme and the CSIRO Flagship Marine & Coastal Carbon Biogeochemical Cluster (Coastal Carbon Cluster). The field work and sample preparation were funded by the SUMILEN project “Advances in sampling techniques, biogeochemical characterization, and quantification of the millenary deposits of seagrasses” (Plan Estatal CTM2013- 47728-R) and PALEOPARK project “Millenary changes in the insular Spanish National Parks: perturbations, resilience and trends after the seagrass archives” (Parques Nacionales 1104/2014). This is a publication of the Group of Benthic Ecology 2014 SGR 120.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/133051reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/doi:10.1016/j.aquabot.2016.05.009Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1330512026-05-22T06:33:51Z
dc.title.none.fl_str_mv Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat
title Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat
spellingShingle Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat
Kaal, Joeri
Molecular composition
Analytical pyrolysis
Seagrass
Posidonia oceanica
title_short Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat
title_full Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat
title_fullStr Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat
title_full_unstemmed Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat
title_sort Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat
dc.creator.none.fl_str_mv Kaal, Joeri
Serrano, Oscar
Nierop, Klaas G. J.
Schellekens, Judith
Martínez Cortizas, Antonio
Mateo, Miguel Ángel
author Kaal, Joeri
author_facet Kaal, Joeri
Serrano, Oscar
Nierop, Klaas G. J.
Schellekens, Judith
Martínez Cortizas, Antonio
Mateo, Miguel Ángel
author_role author
author2 Serrano, Oscar
Nierop, Klaas G. J.
Schellekens, Judith
Martínez Cortizas, Antonio
Mateo, Miguel Ángel
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Molecular composition
Analytical pyrolysis
Seagrass
Posidonia oceanica
topic Molecular composition
Analytical pyrolysis
Seagrass
Posidonia oceanica
description Contiene 6 figuras, 2 tablas.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/133051
url http://hdl.handle.net/10261/133051
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/doi:10.1016/j.aquabot.2016.05.009
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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