Martinez E. auteur aut IRD Maamaatuaiahutapu K. auteur aut IRD Payri Claude auteur aut IRD Ganachaud Alexandre auteur aut IRD text journalArticle eng text/pdf born digital access This paper focuses on the invasion by Turbinaria ornata (a brown algae) in the Tuamotu archipelago, French Polynesia [(5-35 degrees S)/(200-230 degrees E)]. Prior to 1980, this alga existed only in the Society and Austral archipelagoes. Between 1985 and 1990, it began to appear in the southern and northern parts of the Tuamotu archipelago. Genetic analyses have been shown not to be appropriate in determining the origin of this algae population. This study investigated the possible ocean drift of floating aggregates of algae. Ocean currents were calculated from satellite data from 1993 to 2001. Their spatial variations as well as their seasonal and interannual variations are described along with calculated drift trajectories. While it was found that mean currents cannot directly transport algae from the Society and Austral archipelagoes to the Tuamotu, the large interannual changes during the El Nino-Southern Oscillation phenomenon produce current reversals that are strong enough to create a transport pathway in a short enough time to allow their survival. specialized drift connectivity Turbinaria ornata surface currents French Polynesia 032 126 26 1 79-86 2007 0722-4028 https://www.documentation.ird.fr/hor/fdi:010037914 10.1007/s00338-006-0160-3 0722-4028 [F B010037914] https://www.documentation.ird.fr/hor/fdi:010037914 https://www.documentation.ird.fr/intranet/publi/2007/05/010037914.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2007-06-01 2017-08-23 fdi:010037914 fre