Surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the Kerguelen region in the Southern Ocean (KEOPS 2 program)
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 (October-November 2011,...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.860296 https://doi.org/10.1594/PANGAEA.860296 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.860296 2023-05-15T18:25:17+02:00 Surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the Kerguelen region in the Southern Ocean (KEOPS 2 program) Lasbleiz, Marine Leblanc, Karine Armand, Leanne K Quéguiner, Bernard MEDIAN LATITUDE: -49.070625 * MEDIAN LONGITUDE: 71.684250 * SOUTH-BOUND LATITUDE: -50.624000 * WEST-BOUND LONGITUDE: 66.717000 * NORTH-BOUND LATITUDE: -48.412000 * EAST-BOUND LONGITUDE: 74.658000 * DATE/TIME START: 2011-10-25T21:00:00 * DATE/TIME END: 2011-11-19T20:47:13 * MINIMUM DEPTH, water: 2 m * MAXIMUM DEPTH, water: 150 m 2016-05-10 text/tab-separated-values, 11715 data points https://doi.pangaea.de/10.1594/PANGAEA.860296 https://doi.org/10.1594/PANGAEA.860296 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.860296 https://doi.org/10.1594/PANGAEA.860296 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Lasbleiz, Marine; Leblanc, Karine; Armand, Leanne K; Christaki, Urania; Georges, Clément; Obernosterer, Ingrid; Quéguiner, Bernard; King, Gary M (2016): Composition of diatom communities and their contribution to plankton biomass in the naturally iron-fertilized region of Kerguelen in the Southern Ocean. FEMS Microbiology Ecology, 92(11), fiw171, https://doi.org/10.1093/femsec/fiw171 Actinocyclus curvatulus biomass as carbon Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus Azpeitia tabularis Biomass estimation after Cornet-Barthaux et al. (2007) Bottle number Chaetoceros aequatoriale Chaetoceros aequatorialis Chaetoceros atlanticus Chaetoceros atlanticus var. neapolitanus Chaetoceros bulbosus Chaetoceros concavicornis Chaetoceros convolutus Chaetoceros criophilus Chaetoceros decipiens Chaetoceros dichaeta Chaetoceros flexuosus Chaetoceros mitra Dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.860296 https://doi.org/10.1093/femsec/fiw171 2023-01-20T09:07:13Z 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 (October-November 2011, KEOPS 2). 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. Comparison with the diatom assemblage composition of a sediment trap deployed in the iron-fertilized area suggests that 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. Dataset Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean Kerguelen Mitra ENVELOPE(11.333,11.333,79.150,79.150) Cornet ENVELOPE(-64.963,-64.963,-65.570,-65.570) ENVELOPE(66.717000,74.658000,-48.412000,-50.624000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Actinocyclus curvatulus biomass as carbon Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus Azpeitia tabularis Biomass estimation after Cornet-Barthaux et al. (2007) Bottle number Chaetoceros aequatoriale Chaetoceros aequatorialis Chaetoceros atlanticus Chaetoceros atlanticus var. neapolitanus Chaetoceros bulbosus Chaetoceros concavicornis Chaetoceros convolutus Chaetoceros criophilus Chaetoceros decipiens Chaetoceros dichaeta Chaetoceros flexuosus Chaetoceros mitra |
spellingShingle |
Actinocyclus curvatulus biomass as carbon Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus Azpeitia tabularis Biomass estimation after Cornet-Barthaux et al. (2007) Bottle number Chaetoceros aequatoriale Chaetoceros aequatorialis Chaetoceros atlanticus Chaetoceros atlanticus var. neapolitanus Chaetoceros bulbosus Chaetoceros concavicornis Chaetoceros convolutus Chaetoceros criophilus Chaetoceros decipiens Chaetoceros dichaeta Chaetoceros flexuosus Chaetoceros mitra Lasbleiz, Marine Leblanc, Karine Armand, Leanne K Quéguiner, Bernard Surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the Kerguelen region in the Southern Ocean (KEOPS 2 program) |
topic_facet |
Actinocyclus curvatulus biomass as carbon Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus Azpeitia tabularis Biomass estimation after Cornet-Barthaux et al. (2007) Bottle number Chaetoceros aequatoriale Chaetoceros aequatorialis Chaetoceros atlanticus Chaetoceros atlanticus var. neapolitanus Chaetoceros bulbosus Chaetoceros concavicornis Chaetoceros convolutus Chaetoceros criophilus Chaetoceros decipiens Chaetoceros dichaeta Chaetoceros flexuosus Chaetoceros mitra |
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 (October-November 2011, KEOPS 2). 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. Comparison with the diatom assemblage composition of a sediment trap deployed in the iron-fertilized area suggests that 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 |
Dataset |
author |
Lasbleiz, Marine Leblanc, Karine Armand, Leanne K Quéguiner, Bernard |
author_facet |
Lasbleiz, Marine Leblanc, Karine Armand, Leanne K Quéguiner, Bernard |
author_sort |
Lasbleiz, Marine |
title |
Surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the Kerguelen region in the Southern Ocean (KEOPS 2 program) |
title_short |
Surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the Kerguelen region in the Southern Ocean (KEOPS 2 program) |
title_full |
Surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the Kerguelen region in the Southern Ocean (KEOPS 2 program) |
title_fullStr |
Surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the Kerguelen region in the Southern Ocean (KEOPS 2 program) |
title_full_unstemmed |
Surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the Kerguelen region in the Southern Ocean (KEOPS 2 program) |
title_sort |
surface diatom community composition and species-specific contribution to carbon biomass, live and empty cell abundances over the kerguelen region in the southern ocean (keops 2 program) |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.860296 https://doi.org/10.1594/PANGAEA.860296 |
op_coverage |
MEDIAN LATITUDE: -49.070625 * MEDIAN LONGITUDE: 71.684250 * SOUTH-BOUND LATITUDE: -50.624000 * WEST-BOUND LONGITUDE: 66.717000 * NORTH-BOUND LATITUDE: -48.412000 * EAST-BOUND LONGITUDE: 74.658000 * DATE/TIME START: 2011-10-25T21:00:00 * DATE/TIME END: 2011-11-19T20:47:13 * MINIMUM DEPTH, water: 2 m * MAXIMUM DEPTH, water: 150 m |
long_lat |
ENVELOPE(11.333,11.333,79.150,79.150) ENVELOPE(-64.963,-64.963,-65.570,-65.570) ENVELOPE(66.717000,74.658000,-48.412000,-50.624000) |
geographic |
Southern Ocean Kerguelen Mitra Cornet |
geographic_facet |
Southern Ocean Kerguelen Mitra Cornet |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Supplement to: Lasbleiz, Marine; Leblanc, Karine; Armand, Leanne K; Christaki, Urania; Georges, Clément; Obernosterer, Ingrid; Quéguiner, Bernard; King, Gary M (2016): Composition of diatom communities and their contribution to plankton biomass in the naturally iron-fertilized region of Kerguelen in the Southern Ocean. FEMS Microbiology Ecology, 92(11), fiw171, https://doi.org/10.1093/femsec/fiw171 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.860296 https://doi.org/10.1594/PANGAEA.860296 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.860296 https://doi.org/10.1093/femsec/fiw171 |
_version_ |
1766206624074039296 |