Sea urchins in the intertidal zone on Karanrang Island, Pangkep Regency; Density, abundance, community structure, and distribution patterns

Sea urchins were ecologically and economically important biota, but scientific information on sea is still very minimal there no ongoing monitoring. The purpose of this study was to determine the density, abundance, community structure, distribution patterns in intertidal zone Karanrang Island, Pangkep Regency. research June-July 2022 carried out at high low tide using three transects measuring 1 x m consisting four plots 50 cm. Determination stations based from local residents get observation tidal conditions. results showed that species two families found, namely Diadema setosum, Echinothrix calamaris, Tripneustes gratilla. D. setosum found be abundant (97.3-97.6%) tended more during than tide. index diversity uniformity porcupine (H' = 0.130-0.142 E 0.118-0.129). dominance range 0.946-0.953 indicating setosum. Spatially, had a uniform pattern, whereas E. calamaris T. gratilla distributed clusters. Further spatial temporal needed comprehensively determinant conditions urchin population