Pigments, elemental composition (C, N, P, and Si), and stoichiometry of particulate matter in the naturally iron fertilized region of Kerguelen in the Southern Ocean
The particulate matter distribution and phytoplankton community structure of the iron-fertilized Kerguelen region were investigated in early austral spring (October-November 2011) during the KEOPS2 cruise. The iron-fertilized region was characterized by a complex mesoscale circulation resulting in a...
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Copernicus Gesellschaft Mbh
2014
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fttriple:oai:gotriple.eu:10670/1.h8cbkv 2023-05-15T17:02:07+02:00 Pigments, elemental composition (C, N, P, and Si), and stoichiometry of particulate matter in the naturally iron fertilized region of Kerguelen in the Southern Ocean Lasbleiz, M. Leblanc, K. Blain, S. Ras, J. Cornet-barthaux, V. Nunige, S. Helias Queguiner, B. 2014-10-30 https://doi.org/10.5194/bg-11-5931-2014 https://archimer.ifremer.fr/doc/00291/40222/39345.pdf https://archimer.ifremer.fr/doc/00291/40222/71288.pdf https://archimer.ifremer.fr/doc/00291/40222/ en eng Copernicus Gesellschaft Mbh doi:10.5194/bg-11-5931-2014 10670/1.h8cbkv https://archimer.ifremer.fr/doc/00291/40222/39345.pdf https://archimer.ifremer.fr/doc/00291/40222/71288.pdf https://archimer.ifremer.fr/doc/00291/40222/ lic_creative-commons other Archimer, archive institutionnelle de l'Ifremer Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2014-10-30 , Vol. 11 , N. 20 , P. 5931-5955 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2014 fttriple https://doi.org/10.5194/bg-11-5931-2014 2023-01-22T18:20:29Z The particulate matter distribution and phytoplankton community structure of the iron-fertilized Kerguelen region were investigated in early austral spring (October-November 2011) during the KEOPS2 cruise. The iron-fertilized region was characterized by a complex mesoscale circulation resulting in a patchy distribution of particulate matter. Integrated concentrations over 200 m ranged from 72.2 to 317.7 mg m(-2) for chlorophyll a 314 to 744 mmol m(-2) for biogenic silica (BSi), 1106 to 2268 mmol m(-2) for particulate organic carbon, 215 to 436 mmol m(-2) for particulate organic nitrogen, and 29.3 to 39.0 mmol m(-2) for particulate organic phosphorus. Three distinct high biomass areas were identified: the coastal waters of Kerguelen Islands, the easternmost part of the study area in the polar front zone, and the southeastern Kerguelen Plateau. As expected from previous artificial and natural iron-fertilization experiments, the iron-fertilized areas were characterized by the development of large diatoms revealed by BSi size-fractionation and high performance liquid chromatography (HPLC) pigment signatures, whereas the iron-limited reference area was associated with a low biomass dominated by a mixed (nanoflagellates and diatoms) phytoplankton assemblage. A major difference from most previous artificial iron fertilization studies was the observation of much higher Si : C, Si : N, and Si : P ratios (0.31 +/- 0.16, 1.6 +/- 0.7 and 20.5 +/- 7.9, respectively) in the iron-fertilized areas compared to the iron-limited reference station (0.13, 1.1, and 5.8, respectively). A second difference is the patchy response of the elemental composition of phytoplankton communities to large scale natural iron fertilization. Comparison to the previous KEOPS1 cruise also allowed to address the seasonal dynamics of phytoplankton bloom over the southeastern plateau. From particulate organic carbon (POC), particulate organic nitrogen (PON), and BSi evolutions, we showed that the elemental composition of the particulate matter also ... Text Kerguelen Islands Southern Ocean Unknown Austral Kerguelen Kerguelen Islands Southern Ocean Biogeosciences 11 20 5931 5955 |
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envir geo Lasbleiz, M. Leblanc, K. Blain, S. Ras, J. Cornet-barthaux, V. Nunige, S. Helias Queguiner, B. Pigments, elemental composition (C, N, P, and Si), and stoichiometry of particulate matter in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
topic_facet |
envir geo |
description |
The particulate matter distribution and phytoplankton community structure of the iron-fertilized Kerguelen region were investigated in early austral spring (October-November 2011) during the KEOPS2 cruise. The iron-fertilized region was characterized by a complex mesoscale circulation resulting in a patchy distribution of particulate matter. Integrated concentrations over 200 m ranged from 72.2 to 317.7 mg m(-2) for chlorophyll a 314 to 744 mmol m(-2) for biogenic silica (BSi), 1106 to 2268 mmol m(-2) for particulate organic carbon, 215 to 436 mmol m(-2) for particulate organic nitrogen, and 29.3 to 39.0 mmol m(-2) for particulate organic phosphorus. Three distinct high biomass areas were identified: the coastal waters of Kerguelen Islands, the easternmost part of the study area in the polar front zone, and the southeastern Kerguelen Plateau. As expected from previous artificial and natural iron-fertilization experiments, the iron-fertilized areas were characterized by the development of large diatoms revealed by BSi size-fractionation and high performance liquid chromatography (HPLC) pigment signatures, whereas the iron-limited reference area was associated with a low biomass dominated by a mixed (nanoflagellates and diatoms) phytoplankton assemblage. A major difference from most previous artificial iron fertilization studies was the observation of much higher Si : C, Si : N, and Si : P ratios (0.31 +/- 0.16, 1.6 +/- 0.7 and 20.5 +/- 7.9, respectively) in the iron-fertilized areas compared to the iron-limited reference station (0.13, 1.1, and 5.8, respectively). A second difference is the patchy response of the elemental composition of phytoplankton communities to large scale natural iron fertilization. Comparison to the previous KEOPS1 cruise also allowed to address the seasonal dynamics of phytoplankton bloom over the southeastern plateau. From particulate organic carbon (POC), particulate organic nitrogen (PON), and BSi evolutions, we showed that the elemental composition of the particulate matter also ... |
format |
Text |
author |
Lasbleiz, M. Leblanc, K. Blain, S. Ras, J. Cornet-barthaux, V. Nunige, S. Helias Queguiner, B. |
author_facet |
Lasbleiz, M. Leblanc, K. Blain, S. Ras, J. Cornet-barthaux, V. Nunige, S. Helias Queguiner, B. |
author_sort |
Lasbleiz, M. |
title |
Pigments, elemental composition (C, N, P, and Si), and stoichiometry of particulate matter in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_short |
Pigments, elemental composition (C, N, P, and Si), and stoichiometry of particulate matter in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_full |
Pigments, elemental composition (C, N, P, and Si), and stoichiometry of particulate matter in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_fullStr |
Pigments, elemental composition (C, N, P, and Si), and stoichiometry of particulate matter in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_full_unstemmed |
Pigments, elemental composition (C, N, P, and Si), and stoichiometry of particulate matter in the naturally iron fertilized region of Kerguelen in the Southern Ocean |
title_sort |
pigments, elemental composition (c, n, p, and si), and stoichiometry of particulate matter in the naturally iron fertilized region of kerguelen in the southern ocean |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2014 |
url |
https://doi.org/10.5194/bg-11-5931-2014 https://archimer.ifremer.fr/doc/00291/40222/39345.pdf https://archimer.ifremer.fr/doc/00291/40222/71288.pdf https://archimer.ifremer.fr/doc/00291/40222/ |
geographic |
Austral Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Austral Kerguelen Kerguelen Islands Southern Ocean |
genre |
Kerguelen Islands Southern Ocean |
genre_facet |
Kerguelen Islands Southern Ocean |
op_source |
Archimer, archive institutionnelle de l'Ifremer Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2014-10-30 , Vol. 11 , N. 20 , P. 5931-5955 |
op_relation |
doi:10.5194/bg-11-5931-2014 10670/1.h8cbkv https://archimer.ifremer.fr/doc/00291/40222/39345.pdf https://archimer.ifremer.fr/doc/00291/40222/71288.pdf https://archimer.ifremer.fr/doc/00291/40222/ |
op_rights |
lic_creative-commons other |
op_doi |
https://doi.org/10.5194/bg-11-5931-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
20 |
container_start_page |
5931 |
op_container_end_page |
5955 |
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1766055374682587136 |