Diversity of Bivalves on the Sowan Coast As a Tourism Object in Tuban Regency

Sowan beach is a beach located north of Java Island in Tuban Regency. Local people take advantage of this beach as a tourist attraction and activities of daily life. Community activity on Sowan beach is currently getting higher so that it affects the quality of the waters and the abundance of biota such as Bivalves (shellfish). Based on this, it is necessary to research to know the diversity of Bivalves on Sowan Beach as a tourist attraction. This type of research is a quantitative descriptive study. The method used in this research is purposive sampling. The research location has 2 stations, namely Karang Beach and White Sand Beach. The results of this study were in the form of data on the types of Bivalves found in the research location as many as 184 consisting of 4 species, namely Perna viridis, Meretrix meretrix, Polymesoda erosa, and Anadara granosa. Based on the results of data analysis, the abundance value of Bivalvia species at station I is 8, and station II is 10.4. The diversity index of Bivalvia species at the station I is 0.61 and station II is 1.28. The dominance index value of Bivalvian species at station 1 is 0.5585 and station II is 0.2687. Based on the abundance value, the diversity index and dominance of Bivalvia in Sowan beach are low. This means that the environmental conditions on the Sowan beach are not good enough to support the breeding of Bivalves