Protist community composition during early phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean)
International audience Abstract. Microbial eukaryotic community composition was examined by 18S rRNA gene tag pyrosequencing, during the early phase of spring phytoplankton blooms induced by natural iron fertilization, off Kerguelen Island in the Southern Ocean (KEOPS2 cruise). A total of 999 operat...
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ftunivlcoteopale:oai:HAL:insu-03324647v1 2024-06-23T07:56:55+00:00 Protist community composition during early phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) Georges, C. Monchy, S. Genitsaris, S. Christaki, U. Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) 2014 https://insu.hal.science/insu-03324647 https://insu.hal.science/insu-03324647/document https://insu.hal.science/insu-03324647/file/bg-11-5847-2014.pdf https://doi.org/10.5194/bg-11-5847-2014 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-5847-2014 insu-03324647 https://insu.hal.science/insu-03324647 https://insu.hal.science/insu-03324647/document https://insu.hal.science/insu-03324647/file/bg-11-5847-2014.pdf doi:10.5194/bg-11-5847-2014 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03324647 Biogeosciences, 2014, 11 (20), pp.5847-5863. ⟨10.5194/bg-11-5847-2014⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2014 ftunivlcoteopale https://doi.org/10.5194/bg-11-5847-2014 2024-06-06T23:35:15Z International audience Abstract. Microbial eukaryotic community composition was examined by 18S rRNA gene tag pyrosequencing, during the early phase of spring phytoplankton blooms induced by natural iron fertilization, off Kerguelen Island in the Southern Ocean (KEOPS2 cruise). A total of 999 operational taxonomical units (OTUs), affiliated to 30 known high-level taxonomic groups, were retrieved from 16 samples collected in the upper 300 m water column. The alveolata group was the most abundant in terms of sequence number and diversity (696 OTUs). The majority of alveolata sequences were affiliated to Dinophyceae and to two major groups of marine alveolates (MALV-I and MALV-II). In the upper 180 m, only 13% of the OTUs were shared between of the fertilized stations and the reference site characterized by high-nutrient low-chlorophyll (HNLC) waters. Fungi and Cercozoa were present in iron-fertilized waters, but almost absent in the HNLC samples, while Haptophyta and Chlorophyta characterized the HNLC sample. Finally, the 300 m depth samples of all stations were differentiated by the presence of MALV-II and Radiolaria. Multivariate analysis, examining the level of similarity between different samples, showed that protistan assemblages differed significantly between the HNLC and iron-fertilized stations, but also between the diverse iron-fertilized blooms. Article in Journal/Newspaper Southern Ocean Université du Littoral Côte d'Opale portail Southern Ocean Kerguelen Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) Biogeosciences 11 20 5847 5863 |
institution |
Open Polar |
collection |
Université du Littoral Côte d'Opale portail |
op_collection_id |
ftunivlcoteopale |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Georges, C. Monchy, S. Genitsaris, S. Christaki, U. Protist community composition during early phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Abstract. Microbial eukaryotic community composition was examined by 18S rRNA gene tag pyrosequencing, during the early phase of spring phytoplankton blooms induced by natural iron fertilization, off Kerguelen Island in the Southern Ocean (KEOPS2 cruise). A total of 999 operational taxonomical units (OTUs), affiliated to 30 known high-level taxonomic groups, were retrieved from 16 samples collected in the upper 300 m water column. The alveolata group was the most abundant in terms of sequence number and diversity (696 OTUs). The majority of alveolata sequences were affiliated to Dinophyceae and to two major groups of marine alveolates (MALV-I and MALV-II). In the upper 180 m, only 13% of the OTUs were shared between of the fertilized stations and the reference site characterized by high-nutrient low-chlorophyll (HNLC) waters. Fungi and Cercozoa were present in iron-fertilized waters, but almost absent in the HNLC samples, while Haptophyta and Chlorophyta characterized the HNLC sample. Finally, the 300 m depth samples of all stations were differentiated by the presence of MALV-II and Radiolaria. Multivariate analysis, examining the level of similarity between different samples, showed that protistan assemblages differed significantly between the HNLC and iron-fertilized stations, but also between the diverse iron-fertilized blooms. |
author2 |
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) |
format |
Article in Journal/Newspaper |
author |
Georges, C. Monchy, S. Genitsaris, S. Christaki, U. |
author_facet |
Georges, C. Monchy, S. Genitsaris, S. Christaki, U. |
author_sort |
Georges, C. |
title |
Protist community composition during early phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_short |
Protist community composition during early phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_full |
Protist community composition during early phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_fullStr |
Protist community composition during early phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_full_unstemmed |
Protist community composition during early phytoplankton blooms in the naturally iron-fertilized Kerguelen area (Southern Ocean) |
title_sort |
protist community composition during early phytoplankton blooms in the naturally iron-fertilized kerguelen area (southern ocean) |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://insu.hal.science/insu-03324647 https://insu.hal.science/insu-03324647/document https://insu.hal.science/insu-03324647/file/bg-11-5847-2014.pdf https://doi.org/10.5194/bg-11-5847-2014 |
long_lat |
ENVELOPE(69.500,69.500,-49.250,-49.250) |
geographic |
Southern Ocean Kerguelen Kerguelen Island |
geographic_facet |
Southern Ocean Kerguelen Kerguelen Island |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03324647 Biogeosciences, 2014, 11 (20), pp.5847-5863. ⟨10.5194/bg-11-5847-2014⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-11-5847-2014 insu-03324647 https://insu.hal.science/insu-03324647 https://insu.hal.science/insu-03324647/document https://insu.hal.science/insu-03324647/file/bg-11-5847-2014.pdf doi:10.5194/bg-11-5847-2014 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-11-5847-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
20 |
container_start_page |
5847 |
op_container_end_page |
5863 |
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1802650304088375296 |