Fig 1.
Map of the sampling sites of Pocillopora damicornis type β in Reunion Island.
Lagoons are represented in dark grey. The channel between REU1 and REU2 is symbolized with a dash line and the direction of the South Equatorial Current around Reunion Island is symbolized with black arrows (from [37]). (Open access data: http://sextant.ifremer.fr/fr/web/ocean_indien/geoportail/sextant#/metadata/f3587329-b5b7-4ee1-822d-5cda9cef4d09).
Fig 2.
Spatial representation of Pocillopora damicornis type β colonies sampled in (a) REU1 (N = 158) and (b) REU2 (N = 264).
Each symbol represents a colony. Multi-locus genotypes (MLG) occurring only once are represented with “+”. Colonies sharing the same MLG are represented with the same color and each repeated MLG is represented by a different color. MLGs shared by both sites are represented with circles (MLG01: red, MLG02: blue, MLG03: white, MLG04: green, MLG05: black) and MLGs specific to a unique site with squares.
Fig 3.
Network of multi-locus genotypes (MLG) based on shared allele distance.
The number of colonies sharing each MLG is indicated inside each node and the geographic origin of the colonies is represented by colors. The node shape represents the result of the clustering analysis: circles, MLGs assigned to cluster 1 (see Fig 4) with a probability ≥ 0.90; squares, MLGs assigned to cluster 2 (see Fig 4) with a probability ≥ 0.90; triangles, MLGs assigned to one cluster or the other with a probability ≤ 0.90.
Table 1.
Summary statistics for the four Pocillopora damicornis type β populations.
Table 2.
Genetic differentiation between Pocillopora damicornis type β populations estimated with Weir and Cockerham’s FST [58] and with Jost’s Dest (in parentheses, [59]).
Fig 4.
Results of the clustering analysis for K = 2, (a) for the entire dataset (N = 510) and (b) for the truncated dataset containing one representative per multi-locus genotype and per site (N = 109). For each plot, populations are separated with dash lines. (c) Principal Component Analysis estimated on the truncated dataset (based on 13 microsatellites). Axes 1 (horizontal) and 2 (vertical) represent 31.56% and 10.88% of the total variance, respectively. Symbols are the same than in Fig 3.