FN Archimer Export Format PT J TI From population connectivity to the art of striping Russian dolls: the lessons from Pocillopora corals BT AF GELIN, Pauline FAUVELOT, Cecile BIGOT, Lionel BALY, Joseph MAGALON, Helene AS 1:1;2:2;3:1;4:2;5:1; FF 1:;2:;3:;4:;5:; C1 Univ La Reunion, ENTROPIE, CNRS, UMR,IRD, St Denis, La Reunion, France. Univ La Reunion, Ctr IRD Noumea, CNRS, UMR,ENTROPIE,IRD, Noumea, New Caledonia. C2 UNIV LA REUNION, FRANCE IRD, FRANCE IN DOAJ IF 2.415 TC 18 UR https://archimer.ifremer.fr/doc/00416/52776/53649.pdf https://archimer.ifremer.fr/doc/00416/52776/53650.pdf https://archimer.ifremer.fr/doc/00416/52776/53651.pdf https://archimer.ifremer.fr/doc/00416/52776/53652.pdf https://archimer.ifremer.fr/doc/00416/52776/53653.pdf https://archimer.ifremer.fr/doc/00416/52776/53654.pdf https://archimer.ifremer.fr/doc/00416/52776/53655.pdf LA English DT Article CR BIBELOT CHEST COBELO MAD BO Alis Antea DE ;Bayesian assignments;cluster;DAPC;microsatellites;Pocillopora;scleractinian AB Here, we examined the genetic variability in the coral genus Pocillopora, in particular within the Primary Species Hypothesis PSH09, identified by Gélin, Postaire, Fauvelot and Magalon (2017) using species delimitation methods [also named Pocillopora eydouxi/meandrina complex sensu, Schmidt-Roach, Miller, Lundgren, & Andreakis (2014)] and which was found to split into three secondary species hypotheses (SSH09a, SSH09b, and SSH09c) according to assignment tests using multi-locus genotypes (13 microsatellites). From a large sampling (2,507 colonies) achieved in three marine provinces [Western Indian Ocean (WIO), Tropical Southwestern Pacific (TSP), and Southeast Polynesia (SEP)], genetic structuring analysis conducted with two clustering analyses (Structure and DAPC) using 13 microsatellites revealed that SSH09a was restricted to the WIO while SSH09b and SSH09c were almost exclusively in the TSP and SEP. More surprisingly, each SSH split into two to three genetically differentiated clusters, found in sympatry at the reef scale, leading to a pattern of nested hierarchical levels (PSH > SSH > cluster), each level hiding highly differentiated genetic groups. Thus, rather than structured populations within a single species, these three SSHs, and even the eight clusters, likely represent distinct genetic lineages engaged in a speciation process or real species. The issue is now to understand which hierarchical level (SSH, cluster, or even below) corresponds to the species one. Several hypotheses are discussed on the processes leading to this pattern of mixed clusters in sympatry, evoking formation of reproductive barriers, either by allopatric speciation or habitat selection. PY 2018 PD JAN SO Ecology And Evolution SN 2045-7758 PU Wiley VL 8 IS 2 UT 000425822800051 BP 1411 EP 1426 DI 10.1002/ece3.3747 ID 52776 ER EF