Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/57035
Título: Distribution of zooplankton biomass and potential metabolic activities across the northern Benguela upwelling system
Autores/as: Fernández Urruzola, Igor 
Osma Prado, Natalia 
Packard, Theodore Train 
Gómez Cabrera, María Milagrosa 
Postel, L.
Clasificación UNESCO: 251001 Oceanografía biológica
Palabras clave: Zooplankton
Biomass
Electron transport system (ETS)
Glutamate dehydrogenase (GDH)
Benguela upwelling system
Fecha de publicación: 2014
Publicación seriada: Journal of Marine Systems 
Resumen: The distribution of zooplankton biomass and potential metabolic rates, in terms of electron transport system (ETS) and glutamate dehydrogenase (GDH), were analyzed along a cross-shelf transect in waters off Namibia. The highly variable dynamics of upwelling filaments promoted short-term fluctuations in the zooplankton biomass and metabolism. Maximum values were characteristically found over the shelf-break, where zooplankton biomass as dry mass (DM) reached peaks of 64.5mgm-3 within the upper 200m in late August. Two weeks later, the zooplankton-DM decreased by more than a third (19mg DM m-3). Zooplankton potential respiration and NH4+ excretion averaged 234μmol O2 m-3 d-1 and 169μmol NH4+m-3 d-1 in the Namibian shelf, respectively. High protein-specific ETS activities even in the low-chlorophyll waters outside the filament suggested a shift into greater omnivory seaward. In this light, zooplankton elemental and isotopic compositions were used to investigate the pelagic food web interactions. They evidenced spatial changes in the carbon resource for zooplankton as well as changes in the form of nitrogen that fueled the biological production in aging advected waters. Overall, both aspects of zooplankton metabolism impacted the primary productivity at a level less than 10% under all the different oceanographic conditions.
URI: http://hdl.handle.net/10553/57035
ISSN: 0924-7963
DOI: 10.1016/j.jmarsys.2014.05.009
Fuente: Journal of Marine Systems [ISSN 0924-7963], v. 140 (Part B), p. 138-149
Colección:Artículos
miniatura
pdf
Adobe PDF (1,44 MB)
Vista completa

Citas SCOPUSTM   

24
actualizado el 24-mar-2024

Citas de WEB OF SCIENCETM
Citations

22
actualizado el 25-feb-2024

Visitas

92
actualizado el 13-ene-2024

Descargas

324
actualizado el 13-ene-2024

Google ScholarTM

Verifica

Altmetric


Comparte



Exporta metadatos



Los elementos en ULPGC accedaCRIS están protegidos por derechos de autor con todos los derechos reservados, a menos que se indique lo contrario.