Relationships Between Distributions of Corals and Physical Environments in Amitori Bay, Iriomote Island, Japan

Amitori Bay, located on Iriomote Island in Japan, exhibits significant variability in coral distribution influenced by local physical environments. Research reveals that wave exposure plays a critical role in shaping coral community structure: tabulate corals thrive in areas with high wave energy, while branching corals are less abundant there. This pattern emerges despite the bay's small size, as sediment input from two rivers and varying wave conditions create distinct microenvironments. The study employed comprehensive field surveys at 26 sites, combined with CTD measurements, river flow observations, and numerical simulations to analyze hydrodynamics, temperature, waves, and sediment transport. These findings underscore the complex interplay between physical factors and coral ecology in this UNESCO World Heritage Site.

MURAKAMI, T., UKAI, A., KOHNO, H., MIZUTANI, A., SHIMOKAWA, S., NAKASE, K., NOGUCHI, K., & YASUDA, T. (2012). RELATIONSHIPS BETWEEN DISTRIBUTIONS OF CORALS AND PHYSICAL ENVIRONMENTS IN AMITORI BAY, IRIOMOTE ISLAND, JAPAN. Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering), 68(2), I. https://doi.org/10.2208/jscejoe.68.i_1133