Figure 5.

Connectivity indices. The maps show the potential connectivity to (a) and from (b) every reef of the Ryukyu Archipelago. In (a), the inbound connectivity index (ICI) represents the total area (in km²) of the reefs that are connected to the focal reef with a dF_ST < 0.02 (dF_ST towards the focal reef). Reefs with a high ICI are expected to receive recruits from a larger neighbourhood. In (b), the outbound connectivity index (OCI) displays the total area of the reefs that are connected from the focal reef with a dF_ST < 0.02 (dF_ST from the focal reef). Reefs with a high OCI are expected to disperse towards a larger neighbourhood