Proceedings of the Second Mediterranean Symposium on Marine

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This category includes stations situated close to <strong>the</strong> situation <strong>of</strong> <strong>the</strong>se species in <strong>the</strong> Figure 2. The geographical representation <strong>of</strong> <strong>the</strong> 152 sites sampled in 1999 according to <strong>the</strong>se 5 categories <strong>of</strong> environmental quality is represented in Fig. 5. In view <strong>of</strong> <strong>the</strong>se results, it can be concluded that littoral benthic communities are good indicators <strong>of</strong> environmental quality and can be used in water quality assessments. The changes in <strong>the</strong> specific composition and dominance <strong>of</strong> <strong>the</strong> communities are signs <strong>of</strong> alteration. Species with high quality environmental requirements, such as Cystoseira mediterranea, disappear from disturbed sites. But it is <strong>the</strong> presence <strong>of</strong> C. mediterranea <strong>the</strong> most indicative sign <strong>of</strong> good ecological status <strong>of</strong> littoral waters. In contrast, green algae can be considered as indicators <strong>of</strong> pollution and indicate bad ecological status. Species <strong>of</strong> <strong>the</strong> genus Cystoseira, being perennial plants, integrate environmental changes over a long period <strong>of</strong> time. Thus, community replacements and changes in <strong>the</strong> abundance <strong>of</strong> <strong>the</strong> main species can be used to monitor long-term changes. Fig 5. Geographical representation <strong>of</strong> <strong>the</strong> 152 sites sampled in 1999 according to <strong>the</strong> 5 categories <strong>of</strong> environmental quality defined in <strong>the</strong> text. In <strong>the</strong> last 20 years it seems to be an improvement <strong>of</strong> <strong>the</strong> environmental quality along <strong>the</strong> Catalan coast as <strong>the</strong> number <strong>of</strong> stations with species indicators <strong>of</strong> eutrophication has decreased from 1982. Although <strong>the</strong>re is not a recovery <strong>of</strong> Cystoseira mediterranea, <strong>the</strong> proliferation <strong>of</strong> green algae has decreased. This could be related to <strong>the</strong> implementation <strong>of</strong> a new system <strong>of</strong> sewage discharges from urban areas and <strong>the</strong> industry since 1980’s. In conclusion, littoral benthic communities, (1) show a geographic gradient along <strong>the</strong> catalan coast in relation to <strong>the</strong> degree <strong>of</strong> disturbance, (2) could be good indicators <strong>of</strong> <strong>the</strong> environmental quality, and (3) could be used in a monitoring program to study <strong>the</strong> water quality. ACTES DU DEUXIEME SYMPOSIUM MEDITERRANEEN SUR LA VEGETATION MARINE (ATHENES, 12-13 DECEMBRE 2003) 209
PROCEEDINGS OF THE SECOND MEDITERRANEAN SYMPOSIUM ON MARINE VEGETATION (ATHENS, 12-13 DECEMBER 2003) 210 ACKNOWLEDGEMENTS This study has been financed by <strong>the</strong> Water Catalan Agency (ACA) <strong>of</strong> <strong>the</strong> Environmental Department <strong>of</strong> <strong>the</strong> Generalitat <strong>of</strong> Catalonia. REFERENCES Ballesteros E. (1992) - Els vegetals i la zonació litoral: espècies, comunitats i factors que influeixen la seva distribució. Arxius de la Secció de Ciències CI., Institut d’Estudis Catalans, Barcelona : 616 pp. Ballesteros E., Pérez M. and Zabala M. (1984) - Aproximación al conocimiento de las comunidades algales de la zona infralitoral superior en la costa catalana. Collect. Bot., 15 : 69-100. Bellan-Santini D. (1968) - Influence de la pollution sur les peuplements benthiques. Rev. Intern. Oceanogr. Med., 10 : 27-53. Borowitzka M.A. (1972) - Intertidal algal species diversity and <strong>the</strong> effect <strong>of</strong> pollution. Aust. J. Mar. Fresh. Res., 23 : 73-84. Feldmann J. (1937) - Recherches sur la végétation marine de la Méditerranée. La côte des Albères. Rev. Algol., 10 : 73-254. Golubic S. (1970) - Effect <strong>of</strong> organic pollution on benthic communities. Mar. Poll. Bull., 1: 56-57. Levine H.G. (1984) - The use <strong>of</strong> seaweeds for monitoring coastal waters. In: Algae as ecological indicators, L. E. Shubert (ed.), Academic Press, London : 189-210. Pearson T.H. and Rosenberg R. (1978) - Macrobenthic succession in relation to organic enrichment and pollution <strong>of</strong> <strong>the</strong> marine environment. Ocean. Mar. Biol. Ann. Rev., 16 : 229-311. Soltan D., Verlaque M., Boudouresque C.H. and Francour P. (2001) - Changes in macroalgal communities in <strong>the</strong> vicinity <strong>of</strong> <strong>the</strong> mediterranean sewage outfall after <strong>the</strong> setting up <strong>of</strong> a treatment plant. Mar. Poll. Bull., 42 : 59-70. Ter Braak C.J.F. (1988) - CANOCO – a FORTRAN program for canonical community ordination by (partial) (detrended) (canonical) correspondence analysis (version 2.1), T.N.O. Institute <strong>of</strong> Applied Computer Science, Wageningen.
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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 159 and 160: PROCEEDINGS OF THE SECOND MEDITERRA
Page 164 and 165: CARACTERISATION DE L’ETAT DES HER
Page 166 and 167: RESULTATS A- PHENOLOGIE Les princip
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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 188 and 189: Jonge et al., 2002). Nutrient conce
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Page 192 and 193: offs (group B; Fig
Page 194 and 195: PHYTOBENTHOS AS QUALITY ELEMENT FOR
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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
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
Page 248 and 249: Mr Baris AKÇALI D.E.U. Institute <
Page 250 and 251: Mr Francesco Saverio CIVILI MED POL
Page 252 and 253: Mr Jamel KSOURI Laboratoire de Biod
Page 254 and 255: Mr Frédéric PLATINI Accord RAMOGE
Page 256: Ms Eleni TRYFON Natural Environment
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