Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes

Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes

18 pages, 9 figures, 3 tables.-- Supporting information (Suppl. tables S1-S7, 20 pages) available at: https://doi.org/10.1016/j.dsr.2008.06.007

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Main Authors: Not, Fabrice, Latasa, Mikel, Scharek, Renate, Viprey, Manon, Karleskind, Pierre, Balagué, Vanessa, Ontoria-Oviedo, Imelda, Cumino, Andrea, Goetze, Erica, Vaulot, Daniel, Massana, Ramon
Format: artículo biblioteca
Language:English
Published: Elsevier 2008-11
Subjects:Protist, Phytoplankton, Picoplankton, Diversity, Indian Ocean,
Online Access:http://hdl.handle.net/10261/13605
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spelling dig-icm-es-10261-136052020-11-19T10:11:09Z Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes Not, Fabrice Latasa, Mikel Scharek, Renate Viprey, Manon Karleskind, Pierre Balagué, Vanessa Ontoria-Oviedo, Imelda Cumino, Andrea Goetze, Erica Vaulot, Daniel Massana, Ramon Protist Phytoplankton Picoplankton Diversity Indian Ocean 18 pages, 9 figures, 3 tables.-- Supporting information (Suppl. tables S1-S7, 20 pages) available at: https://doi.org/10.1016/j.dsr.2008.06.007 Protists, and among them the picoeukaryotes (cells<3 μm), have been described as significant contributors to both carbon biomass and production in oligotrophic regions of the oceans. However, protist assemblages remain largely undescribed in pelagic ecosystems and in particular in the Indian Ocean. In the present work, we investigated protists along an eastward transect across the sub-tropical gyre of the Indian Ocean (from South Africa to Australia), with a particular focus on picoeukaryotes. We combined inverted and epifluorescence microscopy, flow cytometry, pigment analysis, denaturing gel gradient electrophoresis (DGGE), 18S rDNA clone libraries, and fluorescent in situ hybridization (FISH). Overall the picophytoplankton fraction contributed 88% and 90% of total Chl a at the surface and DCM, respectively, with picoeukaryotes accounting for 38% and 50% of total Chl a at the surface and DCM. Considering only the Indian South Subtropical Gyre (ISSG) province, we observed greater shifts in the picoeukaryotic assemblage throughout the upper 200 m of the water column than along the ca. 10,000 km cruise track. In terms of taxonomic diversity and contribution of each taxon to the picoeukaryotic community, prasinophytes were well represented at more coastal stations with the genus Micromonas reaching densities up to 750 cell mL−1 in coastal waters and less than 100 cell mL−1 at open ocean stations. Haptophytes (56% and 45% of picoeukaryotic pigments at surface and DCM, respectively) and possibly pelagophytes (28% and 40% of picoeukaryotic pigments at surface and DCM, respectively) appeared to be dominant at open ocean stations. Other groups and in particular organisms affiliated to chrysophytes, and to a lesser extent to cryptophytes, appear as clear targets for future qualitative and quantitative studies. Moreover, the occurrence of many sequences related to radiolarians (5% and 27% at surface and DCM, respectively) will require further investigation This work was funded by projects TRANSINDICO (REN2002-10951-E/MAR, MCyT) to R.M. and PicOcean to D.V., and NSF Grant OCE02-21063 to E.G. and M.D. Ohman funded the ship time. F.N. was supported by a doctoral fellowship from the French Research Ministry Peer reviewed 2009-06-11T10:41:43Z 2009-06-11T10:41:43Z 2008-11 artículo http://purl.org/coar/resource_type/c_6501 Deep Sea Research Part I: Oceanographic Research Papers 55(11): 1456-1473 (2008) 0967-0637 http://hdl.handle.net/10261/13605 10.1016/j.dsr.2008.06.007 en https://doi.org/10.1016/j.dsr.2008.06.007 none 22195 bytes application/pdf Elsevier
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
topic Protist
Phytoplankton
Picoplankton
Diversity
Indian Ocean
Protist
Phytoplankton
Picoplankton
Diversity
Indian Ocean
spellingShingle Protist
Phytoplankton
Picoplankton
Diversity
Indian Ocean
Protist
Phytoplankton
Picoplankton
Diversity
Indian Ocean
Not, Fabrice
Latasa, Mikel
Scharek, Renate
Viprey, Manon
Karleskind, Pierre
Balagué, Vanessa
Ontoria-Oviedo, Imelda
Cumino, Andrea
Goetze, Erica
Vaulot, Daniel
Massana, Ramon
Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes
description 18 pages, 9 figures, 3 tables.-- Supporting information (Suppl. tables S1-S7, 20 pages) available at: https://doi.org/10.1016/j.dsr.2008.06.007
format artículo
topic_facet Protist
Phytoplankton
Picoplankton
Diversity
Indian Ocean
author Not, Fabrice
Latasa, Mikel
Scharek, Renate
Viprey, Manon
Karleskind, Pierre
Balagué, Vanessa
Ontoria-Oviedo, Imelda
Cumino, Andrea
Goetze, Erica
Vaulot, Daniel
Massana, Ramon
author_facet Not, Fabrice
Latasa, Mikel
Scharek, Renate
Viprey, Manon
Karleskind, Pierre
Balagué, Vanessa
Ontoria-Oviedo, Imelda
Cumino, Andrea
Goetze, Erica
Vaulot, Daniel
Massana, Ramon
author_sort Not, Fabrice
title Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes
title_short Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes
title_full Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes
title_fullStr Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes
title_full_unstemmed Protistan assemblages across the Indian Ocean, with a specific emphasis on the picoeukaryotes
title_sort protistan assemblages across the indian ocean, with a specific emphasis on the picoeukaryotes
publisher Elsevier
publishDate 2008-11
url http://hdl.handle.net/10261/13605
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