The purposes of this study were: (1)to describethe change of mangrove forest cover along the coast of East Lampung Regency using Landsat data for 1973, 1983, 1994, 2004, and 2013; (2)todetermine triggering factors that occur in the coast of East Lampung Regency during the years 1973-2013 related to the mangrove forest change.  The methods used in the study are spatial analysis and qualitative descriptive method.  The study was conducted along the coast of East Lampung Regency over period of  October 2013-March 2014.The result shows that: in 1973-1983 increased by 2.541,22 ha, in 1983-1994 decreased by 4.903,54 ha, in 1994-2004 decreased by 6.377,11 ha, in 2004-2013 decreased by 3.059,23 ha.  The related factors that occur in there werechanges in the status management area is happening in Way Kambas National Park (TNWK), there were people migration into Labuhan Maringgai that cutting mangrove, there were fishermen activity in TNWK, transmigration program in Labuhan Maringgai, and  land clearing into ponds in Pasir Sakti, the local government issued a regulation:Peraturan Daerah Kabupaten Lampung Timur Nomor: 03 Tahun 2002 (Rehabilitation of Coastal, Coastal and Marine in East Lampung regency), and many mangrove conservating program organized by Lampung Mangrove Center (LMC) in Labuhan Maringgai and mangrove conservator group (Mutiara Hijau I) in Pasir Sakti.

The mangrove ecosystem holds a lot of potentials to be utilized by local communities in the Riau Coastline. Therefore, this study was carried out to assess the biodiversity of flora and fauna in the Riau Coastline mangrove ecosystem and its impacts on local communities. The transect was performed to identify soil conditions, distribution, and the dominance of flora species, while field observations and interviews with residents were conducted to determine the presence of fauna and discover the ecosystem’s benefit to the local community's economy. Based on the results, Rhizophora mucronata and Rhizophora apiculata has the highest relative dominance (RDC) and important value index in all observed stations. On the other hand, the fish/water biota species has the highest diversity and have economic that mostly serve as a catch for local fishermen. Ecotourism is also encouraged to boost the community's economy and aid ecological learning for sustainability purposes. The mangrove ecosystem's existence remains sustainable because fisheries are the main commodity, however, logging is less desirable as a source of income.