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Lingering Impacts Of Hurricane Hugo On Rhizophora Mangle (Red Mangrove) Population Genetics On St. John, Usvi, Paul Ax Bologna, James J. Campanella, Dena J. Restaino, Zachary A. Fetske, Matthew Lourenco, John V. Smalley

Marine Biology and Coastal Sciences Faculty Scholarship and Creative Works

Stochastic events can have catastrophic effects on island populations through a series of genetic stressors from reduced population size. We investigated five populations of red mangrove (Rhizophora mangle) from St. John, USVI, an UNESCO Biosphere Reserve, which were impacted by Hurricane Hugo in 1989. Our goal was to determine diversity and to ascertain potential population bottlenecks two decades after the event. With the lowest observed heterozygosity, highest inbreeding coefficient, and evidence of a major bottleneck, our results demonstrated that the Great Lameshur mangroves, devastated by Hurricane Hugo, were the least diverse stand of trees. The other four populations from St. …