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dc.contributor.authorOrtiz, José E.es_ES
dc.contributor.authorGómez Borrego, Ángeleses_ES
dc.contributor.authorRodríguez-Gallego, Jose Luises_ES
dc.contributor.authorSánchez-Palencia, Yolandaes_ES
dc.contributor.authorUrbanczyk, Justynaes_ES
dc.contributor.authorTorres, Trinidades_ES
dc.contributor.authorDomingo, Lauraes_ES
dc.contributor.authorEstébanez, Belénes_ES
dc.date.accessioned2017-04-06T13:02:03Z-
dc.date.available2017-04-06T13:02:03Z-
dc.date.issued2016-03-02-
dc.identifier.citationOrganic Geochemistry 95: 41-54 (2016)es_ES
dc.identifier.issn0146-6380-
dc.identifier.urihttp://hdl.handle.net/10261/148073-
dc.description.abstractWe determined the lipid distributions (n-alkanes, n-alkan-2-ones, n-alkanoic acids), total organic carbon (TOC), total nitrogen (TN), Ca/Mg and ash content in Las Conchas mire, a 3.2 m deep bryophyte-dominated mire in Northern Spain covering 8000 cal yr BP. Bog conditions developed in the bottom 20 cm of the profile, and good preservation of organic matter (OM) was inferred from n-alkanoic acid distribution, with the exception of the uppermost 20 cm (last ca. 200 yr). Microbial synthesis of long chain saturated fatty acids from primary OM likely produced a dominance of short chain n-alkanoic acids with a bimodal distribution, as well as the lack of correspondence between the n-alkane and n-alkanoic acid profiles in the upper 20 cm. This was accompanied by an increase in ash content, a decrease in TOC and variation in n-alkane ratios, thereby suggesting significant changes in the mire, namely drainage and transformation to a meadow, in the last ca. 200 yr. The distribution of n-alkan-2-ones indicated an increase in bacterial source from the bottom of the record to 94 cm, whereas their distribution in the upper part could be attributed mainly to plant input and/or the microbial oxidation of n-alkanes. The different n-alkane proxies showed variations, which we interpreted in terms of changes in vegetation (Sphagnum vs. non-Sphagnum dominated phases) during the last 8000 cal yr BP. C23 was the most abundant homolog throughout most of the record, thereby suggesting dominant humid conditions alternating with short drier phases. However, such humid conditions were not linked to paleoclimatic variation but rather to geomorphological characteristics: Las Conchas mire, at the base of the Cuera Range, receives continuous runoff—even during drier periods—which is not necessarily accompanied by additional mineral input to peat, producing the development of Sphagnum moss typical of waterlogged ecotopes and damp habitats. Thus, although geochemical proxies indicated an ombrotrophic regime in the mire, geomorphological characteristics may make a considerable contribution to environmental conditions.es_ES
dc.description.sponsorshipThe study was made possible by funding from the Spanish Inter-Ministry Commission of Science and Technology (CICYT), projects CGL2013-46458-C1-1-R, and CGL2013-46458-C2-2-R.es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relationinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2013-46458-C2-2-Res_ES
dc.relationinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2013-46458-C1-1-Res_ES
dc.relation.isversionofPostprintes_ES
dc.rightsopenAccessen_EN
dc.subjectBiomarkerses_ES
dc.subjectPeates_ES
dc.subjectGeomorphologyes_ES
dc.subjectHolocenees_ES
dc.subjectNorthern Spaines_ES
dc.titleBiomarkers and inorganic proxies in the paleoenvironmental reconstruction of mires: The importance of landscape in Las Conchas (Asturias, Northern Spain)es_ES
dc.typeartículoes_ES
dc.identifier.doi10.1016/j.orggeochem.2016.02.009-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.orggeochem.2016.02.009es_ES
dc.embargo.terms2018-03-03es_ES
dc.rights.licensehttp://creativecommons.org/licenses/by/4.0/es_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)es_ES
dc.relation.csices_ES
oprm.item.hasRevisionno ko 0 false*
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003329es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
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