Mou-Tham Gérard auteur aut IRD Kulbicki Michel auteur aut IRD Gilbert A. auteur aut IRD Tuahine J. auteur aut IRD Andréfouët Serge auteur aut IRD text journalArticle eng text/pdf born digital access Assembly rules of fish communities in Tuamotu Archipelago lagoons have been previously investigated but without considering lagoons where shallow habitats are dominated by giant clam populations. We tested if assembly rules for 14 atolls were challenged by such an atoll (Fangatau), and in doing so investigated the robustness of inter-island population patterns to specialized habitats. Fangatau had significantly higher proportions of Pomacentridae and Scaridae, but lower proportions of Labridae, Acanthuridae, Balistidae and Serranidae. Functionally, herbivores, omnivores, species <7cm or between 50 and 80cm, and species forming schools were found in higher proportions, while sessile invertebrate feeders, medium-size species (30-50cm) and solitary species were lower. These differences were rather related to Fangatau isolation, as no other physical or ecological feature could explain them. Total richness, functional richness, and functional redundancy remained correlated mainly to atoll size, without outliers related to high clam abundance and presence of peculiar habitats. specialized Coral reef fish Pacific Ocean Geomorphology Functional and taxonomic diversity Atoll Tridacna maxima PACIFIQUE TUAMOTU FANGATAU 036 064 48 4 2215-2224 2018 1867-1616 https://www.documentation.ird.fr/hor/fdi:010074491 10.1007/s12526-017-0708-1 1867-1616 [F B010074491] https://www.documentation.ird.fr/hor/fdi:010074491 https://www.documentation.ird.fr/intranet/publi/2018/12/010074491.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2019-01-10 2019-01-10 fdi:010074491 fre