File:Campagne BIOZAIRE 2 - Holothurie lie de vin (Ifremer 00573-68537).jpg
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Français : Sur cette photo sous-marine prise pendant la campagne Biozaïre 2 : une holothurie lie de vin de la famille des Elasipodes, plus communément appelée concombre des mers.
Le programme Environnement Profond/Golfe de Guinée (ou BIOZAIRE) a été développé par l'Ifremer dans le cadre de l'étude du Golfe de Guinée en collaboration avec Total Exploration. L'objectif de ce programme était l'étude de la diversité et du fonctionnement des communautés benthiques en relation avec les principales caractéristiques de l'environnement profond sur des sites de la marge Congo-Gabon-Angola. La particularité essentielle de la marge Gabon-Angola est la coexistence de plusieurs sources de matière que sont les particules d'origine marine, les apports terrestres transportés sur le plateau continental et par le canyon/chenal du Zaïre jusqu'à 5000m de profondeur et enfin la présence de zones très actives d'émissions de fluides froids riches en méthane en relation avec la dissociation d'hydrates de gaz. Ces différentes sources énergétiques conditionnent le développement d'écosystèmes benthiques particuliers à base détritique et chimiosynthétique et décrivent une mosaïque d'habitats dont la première caractérisation constituait l'objectif principal du programme Biozaire. English: In this underwater photo taken during the Biozaire 2 campaign: a wine-coloured sea cucumber from the Elasipoda family, more commonly known as a sea cucumber. The Deep Environment/Gulf of Guinea (or BIOZAIRE) program was developed by Ifremer as part of the Gulf of Guinea study in collaboration with Total Exploration. The objective of this program was to study the diversity and functioning of benthic communities in relation to the main characteristics of the deep environment on sites of the Congo-Gabon-Angola margin. The essential particularity of the Gabon-Angola margin is the coexistence of several sources of matter, namely particles of marine origin, terrestrial inputs transported on the continental shelf and by the Zaire canyon/channel up to 5000m depth and finally the presence of very active zones of emissions of cold fluids rich in methane in relation to the dissociation of gas hydrates. These different energy sources condition the development of particular benthic ecosystems based on detrital and chemosynthetic matter and describe a mosaic of habitats whose first characterization constituted the main objective of the Biozaire program. |
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| Date | 18 November 2001 (upload date) | |||||||||
| Source | Campagne BIOZAIRE 2 - Holothurie lie de vin | |||||||||
| Author | null | |||||||||
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| Keywords | Echinoderm; Sea cucumbers; Abyssal species; Abysses; Biodiversity; Deep environments | |||||||||
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