Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/1199
Title: Prokaryotic respiration and production in the meso- and bathypelagic realm of the eastern and western North Atlantic basin
Authors: Reinthaler, Thomas
Aristegui, J.
Robinson, Carol
Arístegui, Javier 
Lebaron, Philippe
Herndl, Gerhard J.
Aken, Hendrik van
Veth, Cornelis
UNESCO Clasification: Investigación
Keywords: Respiración en el océano
Issue Date: 2006
Journal: Limnology and Oceanography 
Abstract: We measured prokaryotic production and respiration in the major water masses of the North Atlantic down to a depth of 4,000 m by following the progression of the two branches of North Atlantic Deep Water (NADW) in the oceanic conveyor belt. Prokaryotic abundance decreased exponentially with depth from 3 to 0.4 3 105 cells mL21 in the eastern basin and from 3.6 to 0.3 3 105 cells mL21 in the western basin. Prokaryotic production measured via 3H-leucine incorporation showed a similar pattern to that of prokaryotic abundance and decreased with depth from 9.2 to 1.1 mmol C m23 d21 in the eastern and from 20.6 to 1.2 mmol C m23 d21 in the western basin. Prokaryo tic respiration, measured via oxygen consumption, ranged from about 300 to 60 mmol C m23 d21 from ,100 m depth to the NADW. Prokaryotic growth efficiencies of ,2% in the deep waters (depth range 1,200–4,000 m) indicate that the prokaryotic carbon demand exceeds dissolved organic matter input and surface primary production by 2 orders of magnitude. Cell-specific prokaryotic production was rather constant throughout the water column, ranging from 15 to 32 3 1023 fmol C cell21 d21 in the eastern and from 35 to 58 3 1023 fmol C cell21 d21 in the western basin. Along with increasing cell-specific respiration towards the deep water masses and the relatively short turnover time of the prokaryotic community in the dark ocean (34–54 d), prokaryotic activity in the meso- and bathypelagic North Atlantic might be higher than previously assumed.
URI: http://hdl.handle.net/10553/1199
ISBN: 243590
ISSN: 0024-3590
DOI: 10.4319/lo.2006.51.3.1262
Source: Limnology and Oceanography[ISSN 0024-3590],v. 51, p. 1262-1273
Appears in Collections:Artículos
Thumbnail
Adobe PDF (272,65 kB)
Show full item record

SCOPUSTM   
Citations

105
checked on Mar 28, 2020

WEB OF SCIENCETM
Citations

101
checked on Mar 28, 2020

Page view(s)

11
checked on Mar 28, 2020

Download(s)

15
checked on Mar 28, 2020

Google ScholarTM

Check

Altmetric


Share



Export metadata



Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.