Natural mangrove associated gastropods at Bengkalis island, Riau Province, Indonesia: prelimanary survey

Abstract

Abstract Mangroves have different natural and unnatural conditions and are known as marine habitats. The aim of this research was to determine the relationship between gastropods and environmental conditions for monitoring mangrove rehabilitation. The research was conducted from 8th to 16th October 2023 at Bengkalis Island, Riau Province, Indonesia. This research used a survey method with observation of mangroves, marine biota, and environmental parameters on landward, mid ward and seaward. The measurement of marine biota was conducted using a transect of 25 cm x 25 cm and environmental parameters included pH using a pH meter, salinity using a refractometer, and sediment type analysis. pH and salinity values ranged from 5-8 and 14-35 psu. The number of gastropods found was 5 (five) specimens in Bengkalis Island. In general, based on morphology, the weight of each of the largest showed T. telescopium > L. angulifera > C. cingulata > C. obtusa > C. angulifera. The results showed that natural mangroves described more various gastropods. Salinity and pH can also be used as a major limiting factor for mangrove rehabilitation monitoring.