English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/164148
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Barium bioaccumulation by bacterial biofilms and implications for Ba cycling and use of Ba proxies

AuthorsMartínez-Ruiz, Francisca; Jroundi, Fadwa; Paytan, Adina; Guerra-Tschuschke, Isabel; Abad, María del Mar; González-Muñoz, María Teresa
Issue Date24-Apr-2018
PublisherMacmillan Publishers
CitationNature Communications 9: 1619 (2018)
AbstractBa proxies have been broadly used to reconstruct past oceanic export production. However, the precise mechanisms underlying barite precipitation in undersaturated seawater are not known. The link between bacterial production and particulate Ba in the ocean suggests that bacteria may play a role. Here we show that under experimental conditions marine bacterial biofilms, particularly extracellular polymeric substances (EPS), are capable of bioaccumulating Ba, providing adequate conditions for barite precipitation. An amorphous P-rich phase is formed at the initial stages of Ba bioaccumulation, which evolves into barite crystals. This supports that in high productivity regions where large amounts of organic matter are subjected to bacterial degradation, the abundant EPS would serve to bind the necessary Ba and form nucleation sites leading to barite precipitation. This also provides new insights into barite precipitation and opens an exciting field to explore the role of EPS in mineral precipitation in the ocean.
Publisher version (URL)http://dx.doi.org/10.1038/s41467-018-04069-z
Appears in Collections:(IACT) Artículos
Files in This Item:
File Description SizeFormat 
paqui digital csic 201841467-018-04069-z.pdfArtículo principal6,72 MBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.