Habitats of larger foraminifera on the upper reef slope of Sesoko Island, Okinawa, Japan

摘要: Larger foraminifera living in the upper 50 m front of fringing coral reef northwest off Sesoko Island, Japan show strong habitat differences. This study closely examines distributions larger foraminifers and relates these to a number key environmental factors using rigorous statistical methods. Since all house symbiotic algae, light attenuation by water column is most important limiting factor that must be dealt with wall structures. Water energy also countered test structure. The local topography responsible for different intensities hydrodynamic forces, which are expressed various substrates, mostly rubble coarse-grained sand. genus Peneroplis, very common on flat, clearly prefers hardgrounds shallowest slope parts down 30 m, while Dendritina restricted sandy bottoms avoids uppermost meters slope. It can found at least. Alveolinella shows similar depth distribution Dendritina, but hard bottom. Parasorites, starts 20 extends 80 m. Sorites, other hand, was only firm substrates between edge same recorded Amphisorus, this not correlated specific substrates. Most Amphistegina species prefer hardgrounds, radiata calcarinids, capable withstanding high energy, abundant close edge. Only Baculogypsinoides inhabits deeper bottom parts. Sections settled Heterostegina, even although occasionally bottoms. Nummulites, contrast, sands 70 Operculina, starting rare individuals were detected macroids.