DescriptionWe propose to test community level population genetic patterns of coral reef fishes as they pertain to the Depth Refuge Hypothesis (DRH) of coral reefs by applying a statistical framework for multi-species analyses using hierarchical Approximate Bayesian Computation (hABC). The DRH specifies that deep reefs are protected from disturbances that effect shallow habitat and can provide a viable reproductive source for shallow reef areas following disturbance. It has been proposed that these foundation reefs may provide refuge not only from local disturbances such as storms or pollution, but can act as a refuge for geographically broad scale major disturbances such as the glaceoeustatic sea-level fluctuations that occur on the order of approximately 100k years at an amplitude of over 100m. During the Last Glacial Maximum (LGM) sea level was thought to have reduced shallow habitat by as much as 90% in the tropical Pacific possibly resulting in increased habitat fragmentation, local extinction, or bottlenecks. We will combine multi-taxa population genetic datasets into a single analysis to determine the proportion of the current community that historically expanded in a temporally clustered pulse, when the pulse occurred, and in what direction (i.e. from shallow water to shallow water across locations, deep water to adjacent shallow water, from shallow water to adjacent deep water, or deep water to deep water across locations.) across the Hawaiian archipelago.
OrganizationUniversity of Hawaii, Manoa
Sponsor Campus GridOSG-XSEDE
Principal Investigator
Robert Toonen
Field Of ScienceBiological Sciences