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Pre-print Volume - Posters BENTHOS COMMITEE n=38); the size differs significantly among the three groups of adults (ANOVA, F=38.99, d.f.=2, p
Pre-print Volume - Posters BENTHOS COMMITEE M. BURGASSI, G. PARDI 1 , I. MALVASO 1 , F.S. RENDE, M.L. GRIPPA 2 , F. CINELLI 1 A.C.S.D.I.S.S.D “Anna Proietti Zolla”, Via Monte Grappa, 28 - 01100 Viterbo, Italia. burgamari@hotmail.com; 1 Department of Biology, Pisa University, Italia. 2 Url CoNISMa, Department of Biology, Pisa University, Italia. PRELIMINARY STUDY ON THE EPIPHYTIC COMMUNITY OF TRANSPLANTED POSIDONIA OCEANICA (L.) DELILE SHOOTS STUDIO PRELIMINARE DELLA COMUNITÀ EPIFITA DI FASCI TRAPIANTATI DI POSIDONIA OCEANICA (L.) DELILE Abstract – In October 2006 an experiment on Posidonia oceanica (Angiospermae) cuttings was undertaken. In March 2009, several transplanted cuttings were removed to study if the epiphytic community of transplanted shoots and autochthonous shoots seemed different. In this paper we show the preliminary results. Key-words: epiphytic community, Posidonia oceanica, restoration. Introduction - In October 2006, an experiment on new materials for marine restoration with Posidonia oceanica (L.) Delile was undertaken. Several transplantation devices were placed in Cavo Bay (Elba Island), for each device about 20 cuttings of P. oceanica were taken away from the nearby natural meadow and placed overtop (Cinelli et al., 2007). Materials and methods – In March 2009, several transplanted cuttings of P. oceanica were removed to study in the laboratory the shoots’ epiphytic community and to verify if the epiphytic community of transplanted shoots and autochthonous shoots were different. In the same site at 7 m deep, 6 areas were selected at random: 3 areas in natural meadow of P. oceanica and 3 areas in the transplantation devices. In each area, 3 vertical shoots were collected at random by SCUBA diving and preserved in 4% formalin seawater until the time of examination in the laboratory. The whole internal and external faces of the two external leaves per shoot were observed utilizing a dissecting microscope and a binocular stereomicroscope. All the organisms (both animal and vegetal ones) were identified at species level where possible and the coverage for each species was expressed as percentage cover. Analysis of variance (2 way ANOVA) was used to test the hypothesis that the percentage cover of the most abundant species (percentage cover >1%) and richness of species differed between transplanted shoots and autochthonous shoots. Multivariate analysis of variance based on permutations (PERMANOVA) (Anderson, 2001) was used to test the hypothesis that epiphytic assemblages differed between transplanted shoots and authocthonous shoots. A graphical representation of multivariate patterns was obtained by non-metric multidimensional scaling (nMDS). Results - A total of 34 macroalgae (7 Heterokontophyta, 3 Clorophyta, 24 Rhodophyta) and 23 sessile animal taxa (3 Anellida, 3 Foraminifera, 7 Cnidaria, 8 Bryozoa, 1 Tunicata, 1 Porifera) were found. 41 st S.I.B.M. CONGRESS Rapallo (GE), 7-11 June 2010 264
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