Composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of Kerguelen in the Southern Ocean
In the naturally iron-fertilized surface waters of the northern Kerguelen Plateau region, the early spring diatom community composition and contribution to plankton carbon biomass were investigated and compared with the High Nutrient Low Chlorophyll (HNLC) surrounding waters. The large iron-induced...
Published in: | FEMS Microbiology Ecology |
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Online Access: | https://doi.org/10.1093/femsec/fiw171 https://archimer.ifremer.fr/doc/00347/45850/45512.pdf https://archimer.ifremer.fr/doc/00347/45850/45513.pdf https://archimer.ifremer.fr/doc/00347/45850/45514.pdf https://archimer.ifremer.fr/doc/00347/45850/45515.pdf https://archimer.ifremer.fr/doc/00347/45850/ |
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fttriple:oai:gotriple.eu:10670/1.k1vrti 2023-05-15T18:25:04+02:00 Composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of Kerguelen in the Southern Ocean Lasbleiz, Marine Leblanc, Karine Armand, Leanne K. Christaki, Urania Georges, Clement Obernosterer, Ingrid Queguiner, Bernard https://doi.org/10.1093/femsec/fiw171 https://archimer.ifremer.fr/doc/00347/45850/45512.pdf https://archimer.ifremer.fr/doc/00347/45850/45513.pdf https://archimer.ifremer.fr/doc/00347/45850/45514.pdf https://archimer.ifremer.fr/doc/00347/45850/45515.pdf https://archimer.ifremer.fr/doc/00347/45850/ en eng Oxford Univ Press doi:10.1093/femsec/fiw171 10670/1.k1vrti https://archimer.ifremer.fr/doc/00347/45850/45512.pdf https://archimer.ifremer.fr/doc/00347/45850/45513.pdf https://archimer.ifremer.fr/doc/00347/45850/45514.pdf https://archimer.ifremer.fr/doc/00347/45850/45515.pdf https://archimer.ifremer.fr/doc/00347/45850/ Archimer, archive institutionnelle de l'Ifremer Fems Microbiology Ecology (0168-6496) (Oxford Univ Press), 2016-11 , Vol. 92 , N. 11 , P. fix171 (1-6) envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1093/femsec/fiw171 2023-01-22T17:43:49Z In the naturally iron-fertilized surface waters of the northern Kerguelen Plateau region, the early spring diatom community composition and contribution to plankton carbon biomass were investigated and compared with the High Nutrient Low Chlorophyll (HNLC) surrounding waters. The large iron-induced blooms were dominated by small diatom species belonging to the genera Chaetoceros (Hyalochaete) and Thalassiosira, which rapidly responded to the onset of favorable light-conditions in the meander of the Polar Front. In comparison, the iron-limited HNLC area was typically characterized by autotrophic nanoeukaryote-dominated communities and by larger and more heavily silicified diatom species (e.g. Fragilariopsis spp.). Our results support the hypothesis that diatoms are valuable vectors of carbon export to depth in naturally iron-fertilized systems of the Southern Ocean. Furthermore, our results corroborate with observations of the exported diatom assemblage from a sediment trap deployed in the iron-fertilized area, whereby the dominant Chaetoceros (Hyalochaete) cells were less efficiently exported than the less abundant, yet heavily silicified, cells of Thalassionema nitzschioides and Fragilariopsis kerguelensis. Our observations emphasize the strong influence of species-specific diatom cell properties combined with trophic interactions on matter export efficiency, and illustrate the tight link between the specific composition of phytoplankton communities and the biogeochemical properties characterizing the study area. Text Southern Ocean Unknown Kerguelen Southern Ocean FEMS Microbiology Ecology 92 11 fiw171 |
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English |
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envir geo |
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envir geo Lasbleiz, Marine Leblanc, Karine Armand, Leanne K. Christaki, Urania Georges, Clement Obernosterer, Ingrid Queguiner, Bernard Composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
topic_facet |
envir geo |
description |
In the naturally iron-fertilized surface waters of the northern Kerguelen Plateau region, the early spring diatom community composition and contribution to plankton carbon biomass were investigated and compared with the High Nutrient Low Chlorophyll (HNLC) surrounding waters. The large iron-induced blooms were dominated by small diatom species belonging to the genera Chaetoceros (Hyalochaete) and Thalassiosira, which rapidly responded to the onset of favorable light-conditions in the meander of the Polar Front. In comparison, the iron-limited HNLC area was typically characterized by autotrophic nanoeukaryote-dominated communities and by larger and more heavily silicified diatom species (e.g. Fragilariopsis spp.). Our results support the hypothesis that diatoms are valuable vectors of carbon export to depth in naturally iron-fertilized systems of the Southern Ocean. Furthermore, our results corroborate with observations of the exported diatom assemblage from a sediment trap deployed in the iron-fertilized area, whereby the dominant Chaetoceros (Hyalochaete) cells were less efficiently exported than the less abundant, yet heavily silicified, cells of Thalassionema nitzschioides and Fragilariopsis kerguelensis. Our observations emphasize the strong influence of species-specific diatom cell properties combined with trophic interactions on matter export efficiency, and illustrate the tight link between the specific composition of phytoplankton communities and the biogeochemical properties characterizing the study area. |
format |
Text |
author |
Lasbleiz, Marine Leblanc, Karine Armand, Leanne K. Christaki, Urania Georges, Clement Obernosterer, Ingrid Queguiner, Bernard |
author_facet |
Lasbleiz, Marine Leblanc, Karine Armand, Leanne K. Christaki, Urania Georges, Clement Obernosterer, Ingrid Queguiner, Bernard |
author_sort |
Lasbleiz, Marine |
title |
Composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_short |
Composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_full |
Composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_fullStr |
Composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_full_unstemmed |
Composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_sort |
composition of diatom communities and their contribution to plankton biomass in the naturally iron fertilized region of kerguelen in the southern ocean |
publisher |
Oxford Univ Press |
url |
https://doi.org/10.1093/femsec/fiw171 https://archimer.ifremer.fr/doc/00347/45850/45512.pdf https://archimer.ifremer.fr/doc/00347/45850/45513.pdf https://archimer.ifremer.fr/doc/00347/45850/45514.pdf https://archimer.ifremer.fr/doc/00347/45850/45515.pdf https://archimer.ifremer.fr/doc/00347/45850/ |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Archimer, archive institutionnelle de l'Ifremer Fems Microbiology Ecology (0168-6496) (Oxford Univ Press), 2016-11 , Vol. 92 , N. 11 , P. fix171 (1-6) |
op_relation |
doi:10.1093/femsec/fiw171 10670/1.k1vrti https://archimer.ifremer.fr/doc/00347/45850/45512.pdf https://archimer.ifremer.fr/doc/00347/45850/45513.pdf https://archimer.ifremer.fr/doc/00347/45850/45514.pdf https://archimer.ifremer.fr/doc/00347/45850/45515.pdf https://archimer.ifremer.fr/doc/00347/45850/ |
op_doi |
https://doi.org/10.1093/femsec/fiw171 |
container_title |
FEMS Microbiology Ecology |
container_volume |
92 |
container_issue |
11 |
container_start_page |
fiw171 |
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1766206245172150272 |