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Descripción

Coastal upwelling systems account for approximately half of global ocean primary production and contribute disproportionately to biologically driven carbon sequestration. Diatoms, silica-precipitating microalgae, constitute the dominant phytoplankton in these productive regions, and their abundance and assemblage composition in the sedimentary record is considered one of the best proxies for primary production. The study of the sedimentary diatom abundance (SDA) and total organic carbon content (TOC) in the five most important coastal upwelling systems of the modern ocean (Iberia-Canary, Benguela, Peru-Humboldt, California, and Somalia-Oman) reveals a global-scale positive relationship between diatom production and organic carbon burial. The analysis of SDA in conjunction with environmental variables of coastal upwelling systems such as upwelling strength, satellite-derived net primary production, and surface water nutrient concentrations shows different relations between SDA and primary production on the regional scale. On the global scale, SDA appears modulated by the capacity of diatoms to take up silicic acid, which ultimately sets an upper limit to global export production in these ocean regions.

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Sapientia Repositório Institucional Universidade do Algarve  

Autor(es)

Abrantes, Fátima -  Cermeno, Pedro -  Lopes, Cristina -  Romero, Oscar -  Matos, Lelia -  Van Iperen, Jolanda -  Rufino, Marta -  Magalhaes, Vitor - 

Id.: 70981886

Idioma: eng  - 

Versión: 1.0

Estado: Final

Tipo de recurso: article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: openAccess

Requerimientos técnicos:  Browser: Any - 

Relación: [References] info:eu-repo/grantAgreement/FCT/PDCT/56963/PT
[References] info:eu-repo/grantAgreement/FCT/COMPETE/130234/PT
[References] WOS:000381212300003

Fecha de contribución: 09-feb-2018

Contacto:

Localización:
* 1726-4170
* 10.5194/bg-13-4099-2016

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