Communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des Kerguelen et la mer Méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème.
Mesozooplankton from the epipelagic layer (0-200 m) was studied in two contrasted ecosystems: the first one is located in the Austral Ocean, around the Southern part of the Kerguelen shelf and over the HNLC (High Nutrient Low Chlorophyll) area, at the end of summer bloom period supported by natural...
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Language: | French |
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2011
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Online Access: | https://theses.hal.science/tel-00745294 https://theses.hal.science/tel-00745294/document https://theses.hal.science/tel-00745294/file/Nowaczyk_2011.pdf |
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ftunivaixmarseil:oai:HAL:tel-00745294v1 2024-06-16T07:38:52+00:00 Communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des Kerguelen et la mer Méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème. Nowaczyk, Antoine LOPB Centre d'océanologie de Marseille (COM) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Aix-Marseille Université Carlotti, François 2011-12-19 https://theses.hal.science/tel-00745294 https://theses.hal.science/tel-00745294/document https://theses.hal.science/tel-00745294/file/Nowaczyk_2011.pdf fr fre HAL CCSD tel-00745294 https://theses.hal.science/tel-00745294 https://theses.hal.science/tel-00745294/document https://theses.hal.science/tel-00745294/file/Nowaczyk_2011.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00745294 Biodiversité et Ecologie. Aix-Marseille Université, 2011. Français. ⟨NNT : ⟩ Zooplancton biogeochimie océan austral méditerranée copépode écosystème pélagique [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems info:eu-repo/semantics/doctoralThesis Theses 2011 ftunivaixmarseil 2024-05-22T04:25:23Z Mesozooplankton from the epipelagic layer (0-200 m) was studied in two contrasted ecosystems: the first one is located in the Austral Ocean, around the Southern part of the Kerguelen shelf and over the HNLC (High Nutrient Low Chlorophyll) area, at the end of summer bloom period supported by natural iron enrichment (KEOPS, January-February 2005). The second study focused on the whole Mediterranean Sea, along a 3 000 km transect characterized by an oligotrophy gradient decrease from West to East (BOUM, June-July 2008) with low phosphorus concentration. Mesozooplanktonic community was characterized by both its stock composition (abundance and biomass) and its structure (taxonomic composition and size spectrum). Spatial distribution at the regional scale was studied and linked to different environmental and trophic parameters. The community impact on primary production was also estimated from different physiological process analyses (ingestion, respiration and excretion). Mesozooplanktonic community showed higher abundance and biomass over the Kerguelen shelf than in HNLC area. The community was essentially composed by copepodite stages, large quantity of exuviae and high respiration rates suggesting active growth. However, phytoplankton based ingestion rates were low implying the use of other food source such as microzooplankton. In the Mediterranean, abundance showed an increasing westward gradient with a southward decreasing gradient in the Occidental Basin. This distribution was strongly linked to the chlorophyll concentration. Mesozooplankton grazing on primary producers was important. Biogeochemical flux associated with the metabolic activities supported in excess of 100 % of the primary production needs in term of carbon, nitrogen and phosphorus. Relationships between the specific diversity and the environmental variables (physical, chemical and biological) showed a high regionalization in the Mediterranean Sea whereas in the Kerguelen shelf these relations are weak. Le mésozooplancton de la couche ... Doctoral or Postdoctoral Thesis Austral Ocean Aix-Marseille Université: HAL Austral Austral Ocean ENVELOPE(90.000,90.000,-60.000,-60.000) Kerguelen Le Plateau ENVELOPE(70.250,70.250,-49.350,-49.350) |
institution |
Open Polar |
collection |
Aix-Marseille Université: HAL |
op_collection_id |
ftunivaixmarseil |
language |
French |
topic |
Zooplancton biogeochimie océan austral méditerranée copépode écosystème pélagique [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
spellingShingle |
Zooplancton biogeochimie océan austral méditerranée copépode écosystème pélagique [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Nowaczyk, Antoine Communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des Kerguelen et la mer Méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème. |
topic_facet |
Zooplancton biogeochimie océan austral méditerranée copépode écosystème pélagique [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
description |
Mesozooplankton from the epipelagic layer (0-200 m) was studied in two contrasted ecosystems: the first one is located in the Austral Ocean, around the Southern part of the Kerguelen shelf and over the HNLC (High Nutrient Low Chlorophyll) area, at the end of summer bloom period supported by natural iron enrichment (KEOPS, January-February 2005). The second study focused on the whole Mediterranean Sea, along a 3 000 km transect characterized by an oligotrophy gradient decrease from West to East (BOUM, June-July 2008) with low phosphorus concentration. Mesozooplanktonic community was characterized by both its stock composition (abundance and biomass) and its structure (taxonomic composition and size spectrum). Spatial distribution at the regional scale was studied and linked to different environmental and trophic parameters. The community impact on primary production was also estimated from different physiological process analyses (ingestion, respiration and excretion). Mesozooplanktonic community showed higher abundance and biomass over the Kerguelen shelf than in HNLC area. The community was essentially composed by copepodite stages, large quantity of exuviae and high respiration rates suggesting active growth. However, phytoplankton based ingestion rates were low implying the use of other food source such as microzooplankton. In the Mediterranean, abundance showed an increasing westward gradient with a southward decreasing gradient in the Occidental Basin. This distribution was strongly linked to the chlorophyll concentration. Mesozooplankton grazing on primary producers was important. Biogeochemical flux associated with the metabolic activities supported in excess of 100 % of the primary production needs in term of carbon, nitrogen and phosphorus. Relationships between the specific diversity and the environmental variables (physical, chemical and biological) showed a high regionalization in the Mediterranean Sea whereas in the Kerguelen shelf these relations are weak. Le mésozooplancton de la couche ... |
author2 |
LOPB Centre d'océanologie de Marseille (COM) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Aix-Marseille Université Carlotti, François |
format |
Doctoral or Postdoctoral Thesis |
author |
Nowaczyk, Antoine |
author_facet |
Nowaczyk, Antoine |
author_sort |
Nowaczyk, Antoine |
title |
Communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des Kerguelen et la mer Méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème. |
title_short |
Communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des Kerguelen et la mer Méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème. |
title_full |
Communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des Kerguelen et la mer Méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème. |
title_fullStr |
Communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des Kerguelen et la mer Méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème. |
title_full_unstemmed |
Communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des Kerguelen et la mer Méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème. |
title_sort |
communautés métazooplanctoniques de la zone épipélagique de deux environnements contrastés, le plateau des kerguelen et la mer méditerranée : caractérisation, distribution spatiale et rôle dans l'écosystème. |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://theses.hal.science/tel-00745294 https://theses.hal.science/tel-00745294/document https://theses.hal.science/tel-00745294/file/Nowaczyk_2011.pdf |
long_lat |
ENVELOPE(90.000,90.000,-60.000,-60.000) ENVELOPE(70.250,70.250,-49.350,-49.350) |
geographic |
Austral Austral Ocean Kerguelen Le Plateau |
geographic_facet |
Austral Austral Ocean Kerguelen Le Plateau |
genre |
Austral Ocean |
genre_facet |
Austral Ocean |
op_source |
https://theses.hal.science/tel-00745294 Biodiversité et Ecologie. Aix-Marseille Université, 2011. Français. ⟨NNT : ⟩ |
op_relation |
tel-00745294 https://theses.hal.science/tel-00745294 https://theses.hal.science/tel-00745294/document https://theses.hal.science/tel-00745294/file/Nowaczyk_2011.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1802005600540819456 |