Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic

Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic

12 pages, 6 figures, 2 tables

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Main Authors: Baltar, Federico, Arístegui, Javier, Gasol, Josep M., Sintes, Eva, Herndl, Gerhard J.
Format: artículo biblioteca
Language:English
Published: American Society of Limnology and Oceanography 2009-01
Online Access:http://hdl.handle.net/10261/20344
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spelling dig-icm-es-10261-203442020-11-19T08:03:31Z Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic Baltar, Federico Arístegui, Javier Gasol, Josep M. Sintes, Eva Herndl, Gerhard J. 12 pages, 6 figures, 2 tables The distribution of prokaryotic abundance (PA), respiratory activity (ETS), heterotrophic production (PHP), and suspended particulate (POM) and dissolved (DOM) organic matter was determined in the meso- and bathypelagic waters of the (sub)tropical North Atlantic. PA decreased by one order of magnitude from the lower euphotic zone to the bathypelagic waters, while ETS decreased by two and PHP by three orders of magnitude. On a section following the Mid-Atlantic Ridge from 35uN to 5uN, ETS below 1000-m depth increased southwards up to three-fold. This latitudinal gradient in the deep waters was paralleled by a six-fold increase in Particulate Organic Carbon (POC), whereas no trend was apparent in the DOM distribution. Significant correlations between POM and ETS were obtained in the water masses between 1000-m and 3000-m depth, the Antarctic Intermediate Water and the North East Atlantic Deep Water. A strong imbalance in the dark ocean was found between prokaryotic carbon demand (estimated through two different approaches) and the carbon sinking flux derived from sediment-trap records corrected with 230Th. The imbalance was greater when deeper in the water column, suggesting that the suspended carbon pool must account for most of the carbon deficit. Our results, together with other recent findings discussed in this paper, indicate that microbial life in the dark ocean is likely more dependent on slowly sinking or buoyant, laterally advected suspended particles than hitherto assumed Peer reviewed 2010-01-26T12:38:25Z 2010-01-26T12:38:25Z 2009-01 artículo http://purl.org/coar/resource_type/c_6501 Limnology and Oceanography 54(1): 182-193 (2009) 0024-3590 http://hdl.handle.net/10261/20344 10.4319/lo.2009.54.1.0182 en https://doi.org/10.4319/lo.2009.54.1.0182 open 5875 bytes application/pdf American Society of Limnology and Oceanography
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
description 12 pages, 6 figures, 2 tables
format artículo
author Baltar, Federico
Arístegui, Javier
Gasol, Josep M.
Sintes, Eva
Herndl, Gerhard J.
spellingShingle Baltar, Federico
Arístegui, Javier
Gasol, Josep M.
Sintes, Eva
Herndl, Gerhard J.
Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic
author_facet Baltar, Federico
Arístegui, Javier
Gasol, Josep M.
Sintes, Eva
Herndl, Gerhard J.
author_sort Baltar, Federico
title Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic
title_short Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic
title_full Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic
title_fullStr Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic
title_full_unstemmed Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic
title_sort evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical north atlantic
publisher American Society of Limnology and Oceanography
publishDate 2009-01
url http://hdl.handle.net/10261/20344
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AT herndlgerhardj evidenceofprokaryoticmetabolismonsuspendedparticulateorganicmatterinthedarkwatersofthesubtropicalnorthatlantic
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