Mangroves are flora which grow in coastal area and have high tolerance on salinity. Mangroves have an important role in nutrient cycle because it produces nutrient for surriunding ecosystem.Indonesia has wide mangroves,one of them was in Riau provincy.This Research was conducted in September 2022 in Mengkapan Village,Sungai Apit District,Siak Regency,Riau Province. The purpose of this research …