Zubia M. auteur aut IRD De Clerck O. auteur aut IRD Leliaert F. auteur aut IRD Payri Claude auteur aut IRD Mattio L. auteur aut IRD Vieira C. auteur aut IRD Cambert H. auteur aut IRD Quod J. P. auteur aut IRD Loiseau N. auteur aut IRD Golubic S. auteur aut IRD Lin S. M. auteur aut IRD Liu S. L. auteur aut IRD Pinault M. auteur aut IRD text journalArticle eng text/pdf born digital access Recent volcanic lava flows extending into the ocean represent an ideal opportunity to study the long-term successional development of marine floral assemblages on the bare new substratum. We describe the floral assemblages of nine lava flows of different ages (prehistoric to 2007) at Piton de la Fournaise (Reunion Island, Indian Ocean) based on a survey of 37 stations. We identified 159 species including 148 macroalgae, 1 seagrass, and 10 cyanobacteria. Fifty-one of those represent new records for Reunion Island, and at least 9 taxa were identified as new to science. Recent lava flows were characterized by the dominance of ephemeral, opportunistic species, such as Pseudobryopsis hainanensis and Acrocladus dotyanus, while prehistoric lava flows were mainly characterized by perennial species, particularly Sargassum portiericuzum and Turbinaria ornata. A canonical correspondence analysis revealed that the environmental factor that most significantly correlated to the variation in floral assemblages was the distance to the most recent lava flow (2007). This factor was also highly correlated to coral cover. The composition of the different floral assemblages is discussed in relation to abiotic and biotic factors to explain ecological succession in a tropical environment. specialized Cyanobacteria Ecological succession Macroalgae Piton de la fournaise Reunion island REUNION OCEAN INDIEN PITON DE LA FOURNAISE VOLCAN 036 144 20-30 2018 0304-3770 https://www.documentation.ird.fr/hor/fdi:010071897 10.1016/j.aquabot.2017.10.005 0304-3770 [F B010071897] https://www.documentation.ird.fr/hor/fdi:010071897 https://www.documentation.ird.fr/intranet/publi/2018/01/010071897.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2018-02-05 2023-07-11 fdi:010071897 fre