KAJIAN STRUKTUR KOMUNITAS MOLUSKA DI PANTAI REKLAMASI TELUK MANADO

Abstract

This study aims to determine the increase or decrease in mollusk species on the reclamation coast and also to determine the development of the mollusk community structure and its activities in the intertidal zone of the reclamation coast of Manado Bay. Based on the results of sampling obtained 15 species from 7 families. The mollusk density value is 58.30 Ind/m2. The diversity index obtained from the results of the analysis is classified as low, namely H' = 1.684. The dominance value obtained from the results of data analysis is low, namely C = 0.37. The highest species frequency value was found in the Cellana radiata species with a value of 0.60 and the lowest in the Menathais tuberosa species, Drupa rubusidaeus, Drupa ricinus, Nerita polita, with a 0.03 value. The relatively high significance index was found in the species Saccostrea cuccullata with a value of 106.28%, while the lowest value was found in the species Menathais tuberosa and Drupa ricinus with a value of 1.24%. The response and adaptation ability of mollusks in the intertidal zone varies based on the size of the species and their adaptability. The reclamation beach of Manado Bay has a temperature of 29.5 °C, salinity of 30 0 /00, and the obtained pH is 8. Based on these results, the reclamation coastal waters of Manado Bay are classified as good for mollusk life.

Keywords: Community Structure, Mollusk, Reclamation.