Diversity of gastropoda in the Pepe River Parangtritis, Bantul, D.I. Yogyakarta

\nGastropods are quite abundant in nature and their role in river ecosystems is very important. The Pepe River empties in the middle of Parangtritis Beach so it will be affected by tourism developed in the area. This research aims to identify the types of gastropods in the Pepe Parangtritis River, analyze their level of diversity, and also examine each type of gastropod in their environment. Analysis of environmental parameters was also carried out including DO, dissolved CO2, pH, water salinity and also the type of substrate where the gastropods found lived. The research method used was purposive sampling method. Three research stations were determined. Data collection on gastropod samples at the three stations was carried out using the transect method. Data on gastropod types were then analyzed for the level of gastropod diversity. From the research results, 31 species of Gastropod members were found. The gastropods with the highest abundance are from the genus Tarebia. The Shannon-Wiener diversity index is 2.4, which means the level of gastropod diversity in the Pepe Parangtritis River is moderate. The substrate is mud and a little sand at the end of the Pepe River estuary. Environmental parameters are good in supporting gastropod life.\n