Proceedings of the Second Mediterranean Symposium on Marine

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4 (1.6%) and 2 (1.1%) at Spain; 5 (1.9%), 11 (4.5%) and 6 (3.3%) at France; 2 (0.7%), 2 (0.8%) and 2 (1.1%) at GTR; 4 (1.5%), 3 (1.2%) and 5 (2.8%) at LEL; 1 (0.3%), 3 (1.2%) and 2 (1.1%) at MAT <strong>of</strong> Ceramiales, Fucophyceae and Chlorophyceae, respectively (Table 4). The lists <strong>of</strong> each systematic group (Ceramiales, Fucophyceae and Chlorophyceae) <strong>of</strong> <strong>the</strong> above areas have been compared so as to establish <strong>the</strong> degree <strong>of</strong> floristic similarity between each pair <strong>of</strong> <strong>the</strong> six areas, using <strong>the</strong> same methodology as for comparisons within <strong>the</strong> Italian flora. The results dealing with <strong>the</strong> Ceramiales are expressed in <strong>the</strong> dendrogram <strong>of</strong> Fig. 5. The following groups can be identified: that including SPA and FRA to which ITA is linked at a level <strong>of</strong> importance higher than 70% and that including GTR and MAT, linked to <strong>the</strong> previous one at a level slightly higher than 60%, to which LEL is linked at a level <strong>of</strong> 50%. From <strong>the</strong> dendrogram, <strong>the</strong> following conclusions can be drawn: <strong>the</strong> floristic similarity among areas is remarkable being all linked to a level <strong>of</strong> importance higher than 60%, except <strong>the</strong> LEL one (50%). Table 3. Composition <strong>of</strong> <strong>the</strong> six <strong>Mediterranean</strong> macroalgal floras investigated. ITA (Italy), SPA (Spain), FRA (France), GTR (Greece and Turkey) LEL (Libya, Egypt and Levant States), MAT (Morocco, Algeria and Tunisia). In brackets <strong>the</strong> total number <strong>of</strong> species recorded from <strong>the</strong> <strong>Mediterranean</strong> Sea. ITA SPA FRA GTR LEL MAT Ceramiales (260) 215 205 214 175 128 174 82.7% 78.8% 82.3% 67.3% 49.2% 66.9% Fucophyceae (243) 205 134 157 120 74 119 84.3% 55.1% 64.6% 49.3% 30.4% 48.9% Chlorophyceae (178) 154 120 122 95 72 90 86.5% 67.4% 68.5% 53.3% 40.4% 50.5% Table 4. Number <strong>of</strong> common species to all <strong>Mediterranean</strong> floras investigated as well as <strong>of</strong> sole species <strong>of</strong> each flora. In <strong>the</strong> second line per cent values. Common Sole species per flora species to all floras ITA SPA FRA GTR LEL MAT Ceramiales 90 12 3 5 2 4 1 34.6% 4.6% 1.1% 1.9% 0.7% 1.5% 0.3% Fucophyceae 54 30 4 11 2 3 3 22.2% 12.3% 1.6% 4.5% 0.8% 1.2% 1.2% Chlorophyceae 48 21 2 6 2 5 2 29.9% 11.7% 1.1% 3.3% 1.1% 2.8% 1.1% ACTES DU DEUXIEME SYMPOSIUM MEDITERRANEEN SUR LA VEGETATION MARINE (ATHENES, 12-13 DECEMBRE 2003) 61
PROCEEDINGS OF THE SECOND MEDITERRANEAN SYMPOSIUM ON MARINE VEGETATION (ATHENS, 12-13 DECEMBER 2003) 62 Fig. 5. Dendrogram depicting mutual floristic similarities <strong>of</strong> Ceramiales <strong>of</strong> <strong>the</strong> six floras investigated. A ra<strong>the</strong>r similar dendrogram is that <strong>of</strong> Chlorophyceae (Fig. 6) in which <strong>the</strong> following groups can be identified: that including SPA and FRA to which ITA is linked at a level higher than 70% and that including GTR and MAT linked to <strong>the</strong> previous one at a level slightly superior to 50%. Also in this dendrogram LEL seems ra<strong>the</strong>r isolated being linked to <strong>the</strong> last group at a level <strong>of</strong> about 40%. Fig. 6. Dendrogram depicting mutual floristic similarities <strong>of</strong> Chlorophyceae <strong>of</strong> <strong>the</strong> six floras investigated. The dendrogram <strong>of</strong> Fucophyceae (Fig. 7) shows a lower floristic similarity among areas since only <strong>the</strong> group SPA and FRA can be identified linked at a level lower than 70%. To this group is linked ITA at a level lower than 60%. As in previous dendrograms LEL is <strong>the</strong> area with <strong>the</strong> lowest value <strong>of</strong> linkage (about 30%). The discontinuity showed in <strong>the</strong> above three dendrograms by LEL area, due to <strong>the</strong> low number <strong>of</strong> species in each systematic group, could depend besides on <strong>the</strong> insufficient floristic knowledge <strong>of</strong> that area, also on both geomorphologic
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United Nations Environment Programm
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PROCEEDINGS OF THE SECOND MEDITERRA
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CONTENTS/SOMMAIRE Programme .......
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ORFANIDIS S., TSIAGGA E. & STAMATIS
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Friday 12 December 2003 09:00 Openi
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Page 22 and 23: MAPPING MARINE VEGETATION DISTRIBUT
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Page 70 and 71: REFERENCES Agardh C. A. (1822-1823)
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Page 74 and 75: Langenbach G. (1873) - Die Meeresal
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SESSION ‘MAPPING MARINE VEGETATIO
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CARACTERISATION DE L’ETAT DES HER
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RESULTATS A- PHENOLOGIE Les princip
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Les futures recherches scientifique
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Williamson and Fitter, 1996; Piazzi
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Fig. 2: Spatial patterns of
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vulnerable to invaders. In reality
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BIOMONITORING OF ENVIRONMENTAL METL
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Table 1: Mercury concentration (in
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fraction of <stron
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EFFETS DE L’INCORPORATION DE L’
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Les aliments ont été distribués
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REFERENCES Association of</
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Jonge et al., 2002). Nutrient conce
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to total dissolved inorganic nitrog
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offs (group B; Fig
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PHYTOBENTHOS AS QUALITY ELEMENT FOR
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Padina pavonica and Halopteris scop
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Gelidiella ramellosa II - - - - 5.7
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CARACTERISATION DES HERBIERS A POSI
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une analyse lépidochronologique (P
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La limite de l’herbier à Posidon
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LITTORAL BENTHIC COMMUNITIES AS IND
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Several environmental factors were
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This category includes stations sit
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RAPID ASSESSMENT OF THE ECOLOGICAL
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For a thorough presentation <strong
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The Ecological Evaluation o
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APPLICATION OF ECOLOGICAL INDICES O
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The average taxonomic distinctness
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On Fig. 4 each of
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OVERVIEW OF THE ACTIVITIES AIMED AT
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at the same time f
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POSTERS ACTES DU DEUXIEME SYMPOSIUM
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Mr Baris AKÇALI D.E.U. Institute <
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Mr Francesco Saverio CIVILI MED POL
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Mr Jamel KSOURI Laboratoire de Biod
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Mr Frédéric PLATINI Accord RAMOGE
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Ms Eleni TRYFON Natural Environment
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Proceedings of the Second Mediterranean Symposium on Marine

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