|Title:||Prokaryotic carbon utilization in the dark ocean: Growth efficiency, leucine-to-carbon conversion factors, and their relation||Authors:||Baltar, Federico
Gasol, Josep M.
Herndl, Gerhard J.
|UNESCO Clasification:||251001 Oceanografía biológica||Keywords:||Prokaryotic growth efficiency
Leucine-to-carbon conversion factor
|Issue Date:||2010||Publisher:||0948-3055||Project:||Remolinos Oceanicos y de Posición Atmosferica (Roda): Dinámica y Monitorización de Remolinos Oceanicos en la Corriente de Canarias
Intercambio Plataforma-Oceano en El Ecosistema Marino de Las Islas Canarias-Peninsula Iberica (Caibex):Afloramiento de Cabo Guir
|Journal:||Aquatic Microbial Ecology||Abstract:||Experiments were conducted in the mesopelagic subtropical northeast Atlantic Ocean to determine the range of variability in the prokaryotic leucine-to-carbon conversion factor (CF), and prokaryotic growth efficiency (PGE). The way prokaryotic heterotrophic production (PHP) is calculated directly influences PGE (variations of PGE between 1 and 31% were found for a single sample). The empirically obtained deep-water CFs showed a 7-fold variability (0.13 to 0.85 kg C mol–1 Leu), but were always lower than the theoretical CF of 1.55 kg C mol–1 Leu assuming no isotope dilution. Empirically determined CFs were highly correlated to PGE, suggesting that both parameters are representations of the same basic metabolic processes. Overall, the PGEs obtained in this study suggest that mesopelagic prokaryotic assemblages can sometimes be as important in carbon processing as their epipelagic counterparts||URI:||http://hdl.handle.net/10553/51636||ISSN:||0948-3055||DOI:||10.3354/ame01422||Source:||Aquatic Microbial Ecology [ISSN 0948-3055], v. 60 (3), p. 227-232|
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