Mostrar el registro sencillo de la publicación
A source of isotopically light organic carbon in a low-pH anoxic marine zone
| dc.contributor.author | Vargas, Cristian A. | |
| dc.contributor.author | Cantarero, Sebastian I. | |
| dc.contributor.author | Sepúlveda, Julio | |
| dc.contributor.author | Galán, Alexander | |
| dc.contributor.author | De Pol-Holz, Ricardo | |
| dc.contributor.author | Walker, Brett | |
| dc.contributor.author | Schneider, Wolfgang | |
| dc.contributor.author | Farías, Laura | |
| dc.contributor.author | Cornejo D´Ottone, Marcela | |
| dc.contributor.author | Walker, Jennifer | |
| dc.contributor.author | Xu, Xiaomei | |
| dc.contributor.author | Salisbury, Joe | |
| dc.date.accessioned | 2021-12-14T12:27:18Z | |
| dc.date.available | 2021-12-14T12:27:18Z | |
| dc.date.issued | 2021 | |
| dc.identifier.uri | http://repositorio.ucm.cl/handle/ucm/3585 | |
| dc.description.abstract | Geochemical and stable isotope measurements in the anoxic marine zone (AMZ) off northern Chile during periods of contrasting oceanographic conditions indicate that microbial processes mediating sulfur and nitrogen cycling exert a significant control on the carbonate chemistry (pH, AT, DIC and pCO2) of this region. Here we show that in 2015, a large isotopic fractionation between DIC and POC, a DIC and N deficit in AMZ waters indicate the predominance of in situ dark carbon fixation by sulfur-driven autotrophic denitrification in addition to anammox. In 2018, however, the fractionation between DIC and POC was significantly lower, while the total alkalinity increased in the low-pH AMZ core, suggesting a predominance of heterotrophic processes. An isotope mass-balance model demonstrates that variations in the rates of sulfur- and nitrogen-mediated carbon fixation in AMZ waters contribute ~7–35% of the POC exported to deeper waters. Thus, dark carbon fixation should be included in assessments of future changes in carbon cycling and carbonate chemistry due to AMZ expansion. | es_CL |
| dc.language.iso | en | es_CL |
| dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Chile | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | * |
| dc.source | Nature Communications, 12, 1604 | es_CL |
| dc.subject | Biochemistry | es_CL |
| dc.subject | Biogeochemistry | es_CL |
| dc.subject | Chemistry | es_CL |
| dc.subject | Ocean sciences | es_CL |
| dc.title | A source of isotopically light organic carbon in a low-pH anoxic marine zone | es_CL |
| dc.type | Article | es_CL |
| dc.ucm.indexacion | Scopus | es_CL |
| dc.ucm.indexacion | Isi | es_CL |
| dc.ucm.uri | www.nature.com/articles/s41467-021-21871-4#citeas | es_CL |
| dc.ucm.doi | doi.org/10.1038/s41467-021-21871-4 | es_CL |
Ficheros en la publicación
| Ficheros | Tamaño | Formato | Ver |
|---|---|---|---|
|
No hay ficheros asociados a esta publicación. |
|||
Esta publicación aparece en la(s) siguiente(s) colección(ones)
Excepto si se señala otra cosa, la licencia de la publicación se describe como Atribución-NoComercial-SinDerivadas 3.0 Chile