@article{fdi:010072408, title = {{F}rom population connectivity to the art of striping {R}ussian dolls : the lessons from {P}ocillopora corals}, author = {{G}{\'e}lin, {P}auline and {F}auvelot, {C}{\'e}cile and {B}igot, {L}. and {B}aly, {J}oseph and {M}agalon, {H}.}, editor = {}, language = {{ENG}}, abstract = {{H}ere, we examined the genetic variability in the coral genus {P}ocillopora, in particular within the {P}rimary {S}pecies {H}ypothesis {PSH}09, identified by {G}elin, {P}ostaire, {F}auvelot and {M}agalon (2017) using species delimitation methods [also named {P}ocillopora eydouxi/meandrina complex sensu, {S}chmidt-{R}oach, {M}iller, {L}undgren, & {A}ndreakis (2014)] and which was found to split into three secondary species hypotheses ({SSH}09a, {SSH}09b, and {SSH}09c) according to assignment tests using multi-locus genotypes (13 microsatellites). {F}rom a large sampling (2,507 colonies) achieved in three marine provinces [{W}estern {I}ndian {O}cean ({WIO}), {T}ropical {S}outhwestern {P}acific ({TSP}), and {S}outheast {P}olynesia ({SEP})], genetic structuring analysis conducted with two clustering analyses ({S}tructure and {DAPC}) using 13 microsatellites revealed that {SSH}09a was restricted to the {WIO} while {SSH}09b and {SSH}09c were almost exclusively in the {TSP} and {SEP}. {M}ore 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. {T}hus, rather than structured populations within a single species, these three {SSH}s, and even the eight clusters, likely represent distinct genetic lineages engaged in a speciation process or real species. {T}he issue is now to understand which hierarchical level ({SSH}, cluster, or even below) corresponds to the species one. {S}everal 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.}, keywords = {{B}ayesian assignments ; cluster ; {DAPC} ; microsatellites ; {P}ocillopora scleractinian ; {OCEAN} {INDIEN} ; {PACIFIQUE} ; {POLYNESIE} ; {ZONE} {TROPICALE}}, booktitle = {}, journal = {{E}cology and {E}volution}, volume = {8}, numero = {2}, pages = {1411--1426}, ISSN = {2045-7758}, year = {2018}, DOI = {10.1002/ece3.3747}, URL = {https://www.documentation.ird.fr/hor/fdi:010072408}, }