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Posidonia oceanica L. (Delile) Meadow from Messioua

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Author
Sammari, Ch.
Hattour, A.
Komatsu, T.
Zarrouk, S
Ben Mustapha, K.
El Abed, A.
Date
2002

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Alternative Title
L’herbier de Posidonia oceanica l. (delile) du banc Messioua (Tunisie)
Abstract
In order to study the benthic ecology of the “Messioua banc” (30 NM east off Zarzis, Southern Tunisia), a traditional Tunisian sponge fishing ground, four marine campaigns were conducted with the R/V “Hannibal” from October 2000 to August 2001. The objectives of three of these campaigns were field validation, focusing on the sampling of the Posidonia oceanica meadow and of the sponge population. However the goal of the fourth one, with the use of a multi-beam sonar SEABAT 9001 (Reson Co.), was the mapping of bottom of the surveyed area and the scanning of the Posidonia meadow and its sponge population. The field work allowed the study of sixteen stations covered by a dense meadow extending from 21 to 33 m depth, which present the highest density of shots/m² and the biggest Leaf Area Index in the Mediterranean region.
Cette étude intéresse l’écologie benthique du « banc Messioua » (30 MN à l’Est de Zarzis, au Sud de la Tunisie), zone traditionnelle de la pêche aux éponges. Quatre campagnes marines ont été conduites à bord du NRO « Hannibal » d’octobre 2000 à août 2001. Les trois premières avaient pour objectif de valider, par des prospections dites de « réalité » terrain, les données obtenues lors de la quatrième campagne. Ces données traitent de l’herbier de Posidonia oceanica L. (Delile) et de la population d’éponges associée. Lors de la dernière campagne, le travail a été effectué à l’aide d’un sonar multi-faisceaux SEABAT 9001(Reason Co). Cette étude a permis la prospection de seize stations s’étendant entre 21 et 33 m de profondeur et l’analyse phénologique de l’herbier méditerranéen ayant la plus haute densité de faisceaux/m2 et l’Indice Foliaire Global (IFG) le plus élevé.
Journal
Bull. INSTM Salammbô
Volume
29
Publisher or University
INSTM
URI
http://hdl.handle.net/1834/226
Collections
Articles - Bulletin de l'INSTM
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