ABSTRACT Mangrove is a natural fence that functions to prevent abrasion and erosion in coastal areas as well as a place to live for marine biota and several other fauna. Indragiri Hilir is one of the regencies in Riau Province which has a fairly extensive mangrove ecosystem in which it is estimated that there are 60 types of mangroves out of a total of 79 types of mangroves found in Indonesia.…