Mangrove forest in Sungai Apit Subdistrict is the largest forest in Siak District, Riau Province, but since 2000 there has been a decrease in mangrove area. Mangrove rehabilitation efforts have been carried out since 2002. To reduce the level of damage to mangroves, it is necessary to protect and manage mangroves. In order to optimize efforts to protect and manage mangroves, it is necessary…