Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/153905
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Deep-ocean dissolved organic matter reactivity along the Mediterranean Sea: does size matter? |
Autor: | Martínez-Pérez, Alba María CSIC ORCID; Álvarez-Salgado, Xosé Antón CSIC ORCID ; Arístegui, Javier; Nieto-Cid, Mar CSIC ORCID | Fecha de publicación: | 2017 | Editor: | Nature Publishing Group | Citación: | Scientific Reports 7: 5687 (2017) | Resumen: | Despite of the major role ascribed to marine dissolved organic matter (DOM) in the global carbon cycle, the reactivity of this pool in the dark ocean is still poorly understood. Present hypotheses, posed within the size-reactivity continuum (SRC) and the microbial carbon pump (MCP) conceptual frameworks, need further empirical support. Here, we provide field evidence of the soundness of the SRC model. We sampled the high salinity core-of-flow of the Levantine Intermediate Water along its westward route through the entire Mediterranean Sea. At selected sites, DOM was size-fractionated in apparent high (aHMW) and low (aLMW) molecular weight fractions using an efficient ultrafiltration cell. A percentage decline of the aHMW DOM from 68–76% to 40–55% was observed from the Levantine Sea to the Strait of Gibraltar in parallel with increasing apparent oxygen utilization (AOU). DOM mineralization accounted for 30 ± 3% of the AOU, being the aHMW fraction solely responsible for this consumption, verifying the SRC model in the field. We also demonstrate that, in parallel to this aHMW DOM consumption, fluorescent humic-like substances accumulate in both fractions and protein-like substances decline in the aLMW fraction, thus indicating that not only size matters and providing field support to the MCP model | Descripción: | 8 páginas, 1 tabla, 3 figuras.-- This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made | Versión del editor: | http://dx.doi.org/10.1038/s41598-017-05941-6 | URI: | http://hdl.handle.net/10261/153905 | DOI: | 10.1038/s41598-017-05941-6 | E-ISSN: | 2045-2322 |
Aparece en las colecciones: | (IIM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Deep_ocean_dissolved_2017.pdf | 1,34 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
PubMed Central
Citations
2
checked on 12-abr-2024
SCOPUSTM
Citations
17
checked on 21-abr-2024
WEB OF SCIENCETM
Citations
12
checked on 26-feb-2024
Page view(s)
310
checked on 22-abr-2024
Download(s)
269
checked on 22-abr-2024