Structure of echinoderm community in Nirwana Beach, used as learning media on the beach ecosystem

Abstract

This study aims to determine the structure of the Echinoderms Community in the Coastal Area of Nirwana Beach, Baubau City, which is used as a media for the distribution of coastal ecosystems. The method used in this study is a survey method. Data were taken using purposive sampling technique and analyzed in quantitative descriptive. Calculations are used in quantitative data processing using the Shanon-Weaver Diversity formula, Simpson dominance and Darrell's abundance. Vodopich is the number of individuals per unit area. Environmental factors measured are temperature, salinity, and pH. The results showed that at the two research sites namely on the Nirwana beach of Baubau City, Echinoderms found consisted of 4 classes, namely Holothuroidea, Ophiuroidea, Echinoidea dan kelas Asteroidea. The diversity index of Echinoderms found in the two research sites shows differences and if based on the diversity index benchmark values, both locations are in the low diversity category (H < 1,0) which means that productivity is very low as an indication of heavy pressure and an unstable ecosystem. The dominance value of Echinoderms indicates that at the Nirwana beach location no one has dominated. While the abundance value of each class in Echinoderms shows that at the beach location is still very low. This is caused by excessive community activities.