One of the coastal ecosystems that have experienced a high level of degradation due to its utilization pattern which tends not to pay attention to its sustainability aspects is the mangrove forest in Rangsang District, Meranti Islands Regency, and Riau, Indonesia. Seeing the symptoms of mangrove forest destruction for various purposes, it is necessary to manage mangrove forests sustainably. To be able to carry out sustainable management of mangrove forests, management efforts are needed ber of strategic value and right. Management of community-based marine resources is one management strategy that can improve efficiency and fairness in the utilization and management of natural resources. The research aims to identify and analyze the condition of mangrove forests, reviewing mangrove forest management, and the development of community-based mangrove forest in the district of stimuli. The approach used in this study is an analytical descriptive approach with survey methods. This research was conducted in Rangsang sub-district, Meranti Islands regency, Riau. The results showed that the mangrove vegetation found included 7 species from 3 families, namely Avicenniaceae (Avicennia alba and Avicennia marina), Rhizophoraceae (Rhizophora mucronata, Rhizophora apiculata, Rhizophora stylosa, and Bruguiera gymnorrhiza) families, and Sonneratiaceae family (Sonneratia alba) , with the value of diversity index (H ') of mangrove vegetation in Rangsang sub-district at each station ranged from 0.91 to 1.69 and the environmental parameters of mangrove vegetation in Rangsang sub-district were obtained from clay sand, sandy clay and sandy clay; Soil pH ranges from 6.6-7.1; temperatures range from 29-31˚C; salinity ranges from 27-31 ppt; and organic matter content between 1.09-7.65. At the very least, there are three factors of decision making on community participation in mangrove forest management, namely management factors, knowledge factors and attitude factors. Meanwhile, mangrove forest management carried out by the community in Rangsang District in the form of rehabilitation, care and supervision. Therefore, in an effort to manage community-based mangrove forests active community participation is required by taking into account management factors, knowledge factors and attitude factors.

Meranti Islands Regency is a coastal area located in the cluster of Sumatra, Indonesia, right on the outskirts of the Malak Strait. The coastal area is known as a very good, fertile mangrove habitat, has a high carrying capacity as a living area for various aquatic organisms. The existence of mangrove ecosystems on the coast has a very large and beneficial effect on the life of fisheries resources, as well as beneficial for fishing fisheries due to the high productivity in the region. This study aims to obtain information and a clear picture of the development of fishing, and the correlation between the existence of mangrove ecosystems and productivity of fishing. This research uses the descriptive method based on regression and correlation analysis. Each type of data used in this study is primary data on observation and interviews, as well as secondary data on fishing and mangrove areas from the Ministry of Maritime Affairs and Fisheries, Forestry, and the Environmental Management Agency, Meranti Islands Regency. The Meranti Islands over a 15-year period experienced a completely increase or almost completely. Then, the mangrove ecosystem area has no significance that can influence and are closely related to the productivity of shrimp and shellfish in the area.