Iron fertilization and the structure of planktonic communities in high nutrient regions of the Southern Ocean
International audience In this review article, plankton community structure observations are analyzed both for artificial iron fertilization experiments and also for experiments dedicated to the study of naturally iron-fertilized systems in the Atlantic, Indian and Pacific sectors of the Southern Oc...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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ftunivtoulon:oai:HAL:hal-02086574v1 2023-12-31T10:09:12+01:00 Iron fertilization and the structure of planktonic communities in high nutrient regions of the Southern Ocean Fertilisation par le fer et structure des communautés planctoniques dans les régions riches en nutriments de l'océan Austral Queguiner, Bernard Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) 2013 https://hal.science/hal-02086574 https://hal.science/hal-02086574/document https://hal.science/hal-02086574/file/Queguiner,%202013.pdf https://doi.org/10.1016/j.dsr2.2012.07.024 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2012.07.024 hal-02086574 https://hal.science/hal-02086574 https://hal.science/hal-02086574/document https://hal.science/hal-02086574/file/Queguiner,%202013.pdf doi:10.1016/j.dsr2.2012.07.024 info:eu-repo/semantics/OpenAccess ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.science/hal-02086574 Deep Sea Research Part II: Topical Studies in Oceanography, 2013, 90, pp.43-54. ⟨10.1016/j.dsr2.2012.07.024⟩ Plankton Community composition Trophic relationships Southern Ocean Limiting factors Iron Life cycle Plancton Structure de communauté Trophodynamique Océan Austral Facteurs limitants Fer Cycle biologique [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.IE]Environmental Sciences/Environmental Engineering info:eu-repo/semantics/article Journal articles 2013 ftunivtoulon https://doi.org/10.1016/j.dsr2.2012.07.024 2023-12-05T23:41:51Z International audience In this review article, plankton community structure observations are analyzed both for artificial iron fertilization experiments and also for experiments dedicated to the study of naturally iron-fertilized systems in the Atlantic, Indian and Pacific sectors of the Southern Ocean in the POOZ (Permanently Open Ocean Zone) and the PFZ (Polar Frontal Zone). Observations made in natural systems are combined with those from artificially perturbed systems, in order to evaluate the seasonal evolution of pelagic communities, taking into account controlling factors related to the life cycles and the ecophysiology of dominant organisms. The analysis considers several types of planktonic communities, including both autotrophs and heterotrophs. These communities are spatially segregated owing to different life strategies. A conceptual general scheme is proposed to account for these observations and their variability, regardless of experiment type. Diatoms can be separated into 2 groups: Group 1 has slightly silicified fast growing cells that are homogeneously distributed in the surface mixed layer, and Group 2 has strongly silicified slowly growing cells within discrete layers. During the growth season, Group 1 diatoms show a typical seasonal succession of dominant species, within time windows of development that are conditioned by physical factors (light and temperature) as well as endogenous specific rhythms (internal clock), and biomass accumulation is controlled by the availability of nutrients. Group 1 diatoms are not directly grazed by mesozooplankton which is fed by protozooplankton, linking the microbial food web to higher trophic levels. Instead, successive dominant species of Group 1 are degraded via bacterial activity at the end of their growth season. Organic detritus fragments feed protozooplankton and mesozooplankton. The effective silicon pump leads to the progressive disappearance of silicic acid in surface waters. In contrast, Group 2 is resistant to grazing due to its strong ... Article in Journal/Newspaper Mesozooplankton Southern Ocean Université de Toulon: HAL Deep Sea Research Part II: Topical Studies in Oceanography 90 43 54 |
institution |
Open Polar |
collection |
Université de Toulon: HAL |
op_collection_id |
ftunivtoulon |
language |
English |
topic |
Plankton Community composition Trophic relationships Southern Ocean Limiting factors Iron Life cycle Plancton Structure de communauté Trophodynamique Océan Austral Facteurs limitants Fer Cycle biologique [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.IE]Environmental Sciences/Environmental Engineering |
spellingShingle |
Plankton Community composition Trophic relationships Southern Ocean Limiting factors Iron Life cycle Plancton Structure de communauté Trophodynamique Océan Austral Facteurs limitants Fer Cycle biologique [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.IE]Environmental Sciences/Environmental Engineering Queguiner, Bernard Iron fertilization and the structure of planktonic communities in high nutrient regions of the Southern Ocean |
topic_facet |
Plankton Community composition Trophic relationships Southern Ocean Limiting factors Iron Life cycle Plancton Structure de communauté Trophodynamique Océan Austral Facteurs limitants Fer Cycle biologique [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.IE]Environmental Sciences/Environmental Engineering |
description |
International audience In this review article, plankton community structure observations are analyzed both for artificial iron fertilization experiments and also for experiments dedicated to the study of naturally iron-fertilized systems in the Atlantic, Indian and Pacific sectors of the Southern Ocean in the POOZ (Permanently Open Ocean Zone) and the PFZ (Polar Frontal Zone). Observations made in natural systems are combined with those from artificially perturbed systems, in order to evaluate the seasonal evolution of pelagic communities, taking into account controlling factors related to the life cycles and the ecophysiology of dominant organisms. The analysis considers several types of planktonic communities, including both autotrophs and heterotrophs. These communities are spatially segregated owing to different life strategies. A conceptual general scheme is proposed to account for these observations and their variability, regardless of experiment type. Diatoms can be separated into 2 groups: Group 1 has slightly silicified fast growing cells that are homogeneously distributed in the surface mixed layer, and Group 2 has strongly silicified slowly growing cells within discrete layers. During the growth season, Group 1 diatoms show a typical seasonal succession of dominant species, within time windows of development that are conditioned by physical factors (light and temperature) as well as endogenous specific rhythms (internal clock), and biomass accumulation is controlled by the availability of nutrients. Group 1 diatoms are not directly grazed by mesozooplankton which is fed by protozooplankton, linking the microbial food web to higher trophic levels. Instead, successive dominant species of Group 1 are degraded via bacterial activity at the end of their growth season. Organic detritus fragments feed protozooplankton and mesozooplankton. The effective silicon pump leads to the progressive disappearance of silicic acid in surface waters. In contrast, Group 2 is resistant to grazing due to its strong ... |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Queguiner, Bernard |
author_facet |
Queguiner, Bernard |
author_sort |
Queguiner, Bernard |
title |
Iron fertilization and the structure of planktonic communities in high nutrient regions of the Southern Ocean |
title_short |
Iron fertilization and the structure of planktonic communities in high nutrient regions of the Southern Ocean |
title_full |
Iron fertilization and the structure of planktonic communities in high nutrient regions of the Southern Ocean |
title_fullStr |
Iron fertilization and the structure of planktonic communities in high nutrient regions of the Southern Ocean |
title_full_unstemmed |
Iron fertilization and the structure of planktonic communities in high nutrient regions of the Southern Ocean |
title_sort |
iron fertilization and the structure of planktonic communities in high nutrient regions of the southern ocean |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-02086574 https://hal.science/hal-02086574/document https://hal.science/hal-02086574/file/Queguiner,%202013.pdf https://doi.org/10.1016/j.dsr2.2012.07.024 |
genre |
Mesozooplankton Southern Ocean |
genre_facet |
Mesozooplankton Southern Ocean |
op_source |
ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.science/hal-02086574 Deep Sea Research Part II: Topical Studies in Oceanography, 2013, 90, pp.43-54. ⟨10.1016/j.dsr2.2012.07.024⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2012.07.024 hal-02086574 https://hal.science/hal-02086574 https://hal.science/hal-02086574/document https://hal.science/hal-02086574/file/Queguiner,%202013.pdf doi:10.1016/j.dsr2.2012.07.024 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2012.07.024 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
90 |
container_start_page |
43 |
op_container_end_page |
54 |
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1786842239133024256 |