This research in coastal area of Dumai has been completed in September untill Desember 2003. The aim of this research was to collect basic data of mangrove ecosystem which covered inventory of biodiversity and ecology structure by using primary and secondary data. Primary data of mangrove forest ecosystem has been collected by line transect method while secondary data was collected by study literature and previous study report. The result showed that there were 17 types of primary mangrove and 18 types of secondary mangrove. The main value indeks in every study area indicated that in the study area I and IV, Xylocarpus granatum had high value as 104,53 and 104,22 subsequently. In the study area II, III and V, Rhizophora apiculata had the high value which subsequently were 114,39, 108,81 and 110,19. There were two main extinct spesies of mangrove, which are Scyphiphora hydrophyllaceae (Cingam/Perepat Lanang) and Sonneratia ovata (Kedabu), in which exceptional management is needed for sustainability of these species.
The need for data and information is an essential issue in sustainable mangrove management. The availability of data from authorized institutions is essential considering the reliability and consistency of the data, both to process techniques and data availability. This study used national mangrove and landcover data produced by the Ministry of Environment and Forestry through online services. 11 data series (2000 – 2019) obtained through the Representational State Transfer (REST) Application Programming Interface (API) service. Application of spatial analysis of vector data through geoprocessing tools and attribute data management to determine the distribution and changes in mangrove cover and the factors that trigger changes. Estimated data indicate a 13.4% decline in mangroves in Riau Province, with an average decline of 2,495.9 hectares/year. Over 98% of mangrove changes into other functions are caused by human behavior towards mangroves; we need a genuine attitude to preserve the mangroves of Riau Province for the future
The breakwater construction to overcome abrasion at Pambang Pesisir has resulted in the formation of land accretion, which expanded the coastal land and giving rises to issues in public management. This research was aimed to formulate the alternative management of land accretion. A field survey and light unmanned aerial vehicle (drone) data acquisition were used to observe the accretion formed. Furthermore, Analytical Hierarchy Process (AHP) was used to generate the alternative managements of land accretion.The accretion land was estimated around 80,359.4 m2and based on coastal area protection, living creature's habitat, fisheries resources, tourism and business development benefit, social community supporting and sustainability of social interaction criteria's, this area had great potential to be managed with use it for mangrove planting or rehabilitation sites in ecological land-based management.
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