Proceedings of the Second Mediterranean Symposium on Marine

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to total dissolved inorganic nitrogen (TDIN) and nitrate-N, which increased from summer (max. TDIN=6.37 µmol/l) to winter (max. TDIN=23.32 µmol/l). Phosphate-P concentrations (August 2.76 µmol/l, December 1.9 µmol/l) and pH values followed inversely seasonal changes. Dissolved oxygen (aver. 110.3 to 163.2 % saturation) and chl-a (aver. 0.13 to 0.36 µg/l) increased from <strong>the</strong> station 2 to 3. Benthic macrophytes: Twenty-one taxa were identified in total. Three Phaeophyceae (most abundant Cystoseira barbata), six Chlorophyceae (most abundant Ulva sp. Cladophora liniformis, Chaetomorpha aerea), ten Rhodophyceae (most abundant Gracilaria bursa-pastoris, Chondria tenuissima, Polysiphonia elongata), and two Liliopsida (Ruppia cirrhosa and Cymodocea nodosa). They belonged into 5 functionalform groups: sheet, filamentous, coarsely branched, thick blades and seagrasses. Table 1: Results <strong>of</strong> two-way Anova using factor scores <strong>of</strong> <strong>the</strong> PCA <strong>of</strong> water parameters (*p
PROCEEDINGS OF THE SECOND MEDITERRANEAN SYMPOSIUM ON MARINE VEGETATION (ATHENS, 12-13 DECEMBER 2003) 190 Two-way Anova <strong>of</strong> diversity indices (unit number, Shannon-Weaver, Pielou) at speciesand functional goup-level showed a similar trend (not shown). Multivariate analysis <strong>of</strong> <strong>the</strong> Vassova seaweed at species- and functional group-level formed one group for site 2 and two and three groups for site 3, respectively (Fig. 3). The EEI changed seasonally in <strong>the</strong> Vassova lagoon and classified both studied sites in bad-ESC (Fig. 4). Using <strong>the</strong> EEI <strong>the</strong> studied lagoons were classified as: Vassova, Eratino and Keramoti-low ESC; Agiasma-moderate; Fanari-high. Fig. 3: MDS plot <strong>of</strong> Bray-Curtis similarity <strong>of</strong> seaweed at species (A) and functional group (B) level (w=winter, sp=spring, s=summer, a=autumn, numbers indicate site). DISCUSSION Fig. 4: Spatial and seasonal variability <strong>of</strong> <strong>the</strong> water quality <strong>of</strong> <strong>the</strong> Vassova lagoon based on <strong>the</strong> Ecological Evaluation index (ESG=Ecological State Group). Taxa can be selected as bioindicators when <strong>the</strong>y are abundant, functional important, sensitive to environmental changes, easily handled, but more importantly, when <strong>the</strong>ir responses to human impact, e.g. changes in abundance, diversity etc, can be reliably interpreted (Anderson 1999). For latter, a consensus <strong>of</strong> predictive modeling, sound ecological <strong>the</strong>ory, and <strong>the</strong> perturbation pattern <strong>of</strong> <strong>the</strong> study area is needed. Marine benthic macrophytes were dominant components <strong>of</strong> <strong>the</strong> studied lagoons benthic vegetation. The angiosperm Ruppia cirrhosa was dominated in <strong>the</strong> Fanari, an uniform in shape lagoon that receives, in comparison to o<strong>the</strong>r lagoons, <strong>the</strong> lowest agricultural run-
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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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Discussion Discussion - Littoral be
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MAPPING MARINE VEGETATION DISTRIBUT
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1984; Boudouresque et al., 1985b; M
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Elbu cove, Scandula nature 1/ 1190
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features of P. oce
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Belsher T., Houlgatte E. (2000) - E
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Gloux B. (1984) - Méthodes acousti
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Pasqualini, V., Pergent-Martini, C.
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Here, we will firstly delineate wha
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Fig. 2. The tree of</strong
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In the same way, "
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While the
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COASTAL DEVELOPMENT The destruction
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invaders, overfishing and climate c
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At the end <strong
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to be built up, this disappearance
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Boudouresque C.F., Ribera M.A. (199
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Marchand M. (1981) - Amoco Cadiz. B
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FLORISTIC SIMILARITY AND DISCONTINU
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871 accepted taxa (Table 1). Howeve
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Fig. 2. Hystogram showing t
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4 (1.6%) and 2 (1.1%) at Spain; 5 (
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characteristics of
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Fig. 9. Hystogram showing t
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Fig. 11. Dendrogram depicting mutua
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REFERENCES Agardh C. A. (1822-1823)
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De Toni G. B. (1905) - Sylloge Alga
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Langenbach G. (1873) - Die Meeresal
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SESSION «BIOLOGY, ECOLOGY AND INVE
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SESSION ‘MAPPING MARINE VEGETATIO
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Page 139 and 140: PROCEEDINGS OF THE SECOND MEDITERRA
Page 164 and 165: CARACTERISATION DE L’ETAT DES HER
Page 166 and 167: RESULTATS A- PHENOLOGIE Les princip
Page 168 and 169: Les futures recherches scientifique
Page 170 and 171: Williamson and Fitter, 1996; Piazzi
Page 172 and 173: Fig. 2: Spatial patterns of
Page 174 and 175: vulnerable to invaders. In reality
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Page 178 and 179: Table 1: Mercury concentration (in
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Page 198 and 199: Gelidiella ramellosa II - - - - 5.7
Page 200 and 201: CARACTERISATION DES HERBIERS A POSI
Page 202 and 203: une analyse lépidochronologique (P
Page 204 and 205: La limite de l’herbier à Posidon
Page 206 and 207: LITTORAL BENTHIC COMMUNITIES AS IND
Page 208 and 209: Several environmental factors were
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Page 212 and 213: RAPID ASSESSMENT OF THE ECOLOGICAL
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Page 216 and 217: The Ecological Evaluation o
Page 218 and 219: APPLICATION OF ECOLOGICAL INDICES O
Page 220 and 221: The average taxonomic distinctness
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Page 224 and 225: OVERVIEW OF THE ACTIVITIES AIMED AT
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Page 228: 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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