Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/42244
COMPARTIR / EXPORTAR:
SHARE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Campo DC | Valor | Lengua/Idioma |
---|---|---|
dc.contributor.author | Sánchez-Moral, Sergio | - |
dc.contributor.author | Portillo Guisado, María del Carmen | - |
dc.contributor.author | Janices Alonso, Irene | - |
dc.contributor.author | Cuezva, Soledad | - |
dc.contributor.author | Fernández Cortés, A. | - |
dc.contributor.author | Cañaveras, Juan Carlos | - |
dc.contributor.author | González Grau, Juan Miguel | - |
dc.date.accessioned | 2011-11-08T10:56:56Z | - |
dc.date.available | 2011-11-08T10:56:56Z | - |
dc.date.issued | 2011 | - |
dc.identifier.citation | Geomorphology | es_ES |
dc.identifier.issn | 0169-555X | - |
dc.identifier.uri | http://hdl.handle.net/10261/42244 | - |
dc.description | 52 referencias. En prensa. All Altamira Cave Research Centre and Museum staff is acknowledged for their collaboration throughout the whole research period. | es_ES |
dc.description.abstract | Bacteria are able to induce carbonate precipitation although the participation of microbial or chemical processes in speleothem formation remains a matter of debate. In this study, the origin of carbonate depositions such as moonmilk, an unconsolidated microcrystalline formation with high water content, and the consolidation of carbonate precipitates into hard speleothems were analyzed. The utilized methods included measurements of the composition of stable isotopes in these precipitates, fluorimetric determinations of RNA/DNA ratios and respirometric estimations in Altamira Cave. Results from isotope composition showed increases of the δ18O and δ13C ratios from moonmilk in the very first stages of formation towards large speleothems. Estimates of RNA/DNA ratios suggested an inactivation of microorganisms from incipient moonmilk towards consolidated deposits of calcium carbonate. Respiratory activity of microorganisms also showed a significant decrease in samples with accumulated calcite. These results suggest that bacterial activity induces the conditions required for calcium carbonate precipitation, initiating the first stages of deposition. Progressive accumulation of carbonate leads towards a less favorable environment for the development of bacteria. On consolidated speleothems, the importance of bacteria in carbonate deposition decreases and chemical processes gain importance in the deposition of carbonates. | es_ES |
dc.description.sponsorship | This research was supported by CGL2006-11561/BTE project. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | openAccess | es_ES |
dc.subject | Moonmilk | es_ES |
dc.subject | Cave | es_ES |
dc.subject | Bacterial communities | es_ES |
dc.subject | Bacterial activity | es_ES |
dc.subject | pH | es_ES |
dc.subject | Carbonate precipitation | es_ES |
dc.title | The role of microorganisms in the formation of calcitic moonmilk deposits and speleothems in Altamira Cave | es_ES |
dc.type | artículo | es_ES |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | doi:10.1016/j.geomorph.2011.10.030 | es_ES |
dc.contributor.funder | Ministerio de Educación y Ciencia (España) | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
Aparece en las colecciones: | (IRNAS) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
The role of microorganisms in the formation.pdf | 457,67 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
Page view(s)
434
checked on 27-abr-2024
Download(s)
351
checked on 27-abr-2024
Google ScholarTM
Check
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.