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- W2049816900 abstract "AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 52:99-106 (2008) - DOI: https://doi.org/10.3354/ame01216 Exploring the relationship between active bacterioplankton and phytoplankton in the Southern Ocean E. Ortega-Retuerta1,*, I. Reche1,2, E. Pulido-Villena3, S. Agustí4, C. M. Duarte4 1Departamento de Ecología, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain 2Instituto del Agua, Universidad de Granada, 18071 Granada, Spain 3Laboratoire d’Océanographie de Villefranche, Villefranche-sur-Mer, France 4Institut Mediterrani d’Estudis Avançats (IMEDEA) (CSIC-UIB), Miquel Marqués 21, 07190 Esporles, Illes Balears, Spain *Email: evaor@ugr.es ABSTRACT: Bacterioplankton are a heterogenous community composed of cells with different physiological states. The consideration of the active fraction of bacterioplankton as a potential factor affecting the strength of the relationship between bacteria and phytoplankton in the Southern Ocean was evaluated in waters around the Antarctic Peninsula. We estimated active bacterioplankton from uptake of 3H-Leucine (bacterial production [BP]) and using vital stains to estimate their proportion within the total bacterioplankton community, based on their relative nucleic acid content (high [HNA] vs. low [LNA]), and by nucleic acid double staining (NADS), based on their membrane permeability. Then we performed a comparative analysis between total and active bacterioplankton and chlorophyll a (chl a) in this area. Staining with NADS suggested that 61% of all bacteria were viable, a higher proportion of the total bacterial community than previously reported for the Southern Ocean. HNA bacteria comprised 45% of all bacteria, indicating that 16% of bacteria may be viable but with LNA. BP was more strongly related to abundance of LNA cells than NADS-viable or HNA bacteria. The relationship between chl a and bacterial abundance (BA) did not increase when considering the abundance of HNA or NADS-viable cells alone, showing that viability/activity of stains did not enhance the linkage between BA and phytoplankton biomass in the Southern Ocean. In contrast, the relationship between chl a and BP was stronger than those reported in the literature, suggesting that, in this region, BP is closely dependent on phytoplankton. KEY WORDS: Active bacteria · NADS · HNA · LNA · Bacterial production · Chlorophyll a · Southern Ocean Full text in pdf format PreviousCite this article as: Ortega-Retuerta E, Reche I, Pulido-Villena E, Agustí S, Duarte CM (2008) Exploring the relationship between active bacterioplankton and phytoplankton in the Southern Ocean. Aquat Microb Ecol 52:99-106. https://doi.org/10.3354/ame01216 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 52, No. 1. Online publication date: July 10, 2008 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2008 Inter-Research." @default.
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- W2049816900 title "Exploring the relationship between active bacterioplankton and phytoplankton in the Southern Ocean" @default.
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