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Currents of Connectivity: Genetic Exchange and Ocean Circulation in Dutch Caribbean Scleractinian Corals
LĆ³pez MĆ”rquez, Violeta Scherpereel, Colin Hellemans, Bart Mijts, Eric
Hanert, Emmanuel Volckaert, Filip
Scherpereel, Colin
Hellemans, Bart
Hanert, Emmanuel
Volckaert, Filip
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Location research
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2025-05-26
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Abstract
Marine dispersal dynamics are key to shaping the genetic connectivity and resilience of reef ecosystems. This study investigates the impact of ocean circulation and coral reproductive strategies on the genetic connectivity of Diploria labyrinthiformis (broadcast spawner) and Favia fragum (brooder) across Aruba, Bonaire, and CuraƧao. The reproductive mode plays a critical role in population genetic structuring: brooders exhibit higher genetic differentiation due to limited larval dispersal, while broadcast spawners disperse more extensively, aided by longer pelagic larval durations.
Using 3D hydrodynamic simulations of the Caribbean Current coupled with an individual-based model, we explored abiotic connectivity patterns for these two species. Microsatellite genotyping reveals pronounced genetic structuring in F. fragum, occasional long-distance dispersal events, and evidence of source-sink dynamics. In contrast, D. labyrinthiformis exhibits lower genetic differentiation, consistent with its broader dispersal potential.
These findings underscore the complex interplay between ocean currents and reproductive strategies in driving genetic connectivity. By advancing our understanding of population dynamics in reef-building corals, this research provides valuable insights for conservation planning and the long-term sustainability of coral reef ecosystems in the Dutch Caribbean.
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LĆ³pez-MĆ”rquez, V., Scherpereel, C. Hellemans, B. Mijts, E.N., Hanert, Emmanuel & Volckaert F.A.M. (2025, May 26). Currents of Connectivity: Genetic Exchange and Ocean Circulation in Dutch Caribbean Scleractinian Corals. ICMS Conference. Aruba.
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