@misc{10481/53228,
year = {2018},
month = {4},
url = {http://hdl.handle.net/10481/53228},
abstract = {Ba 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.},
organization = {This study was supported by the European Regional Development Fund (ERDF) cofinanced
grant CGL2015-66830-R (MINECO Secretaría de Estado de Investigación,
Desarrollo e Innovación, Spain), Research Groups BIO 103 and RNM-179 (Junta de Andalucía), and the University of Granada (Unidad Científica de Excelencia UCEPP2016-05).},
publisher = {Springer Nature},
title = {Barium bioaccumulation by bacterial biofilms and implications for Ba cycling and use of Ba proxies},
doi = {10.1038/s41467-018-04069-z},
author = {Martínez Ruiz, Francisca and Jroundi, Fadwa and Paytan, A. and Guerra Tschuschke, Isabel and Abad Grau, María Del Mar and González Muñoz, María Teresa},
}