CD Disertasi
Model Pengelolaan Hutan Mangrove Berkelanjutan Di Kabupaten Bengkalis
Mangrove forest is a typical forest type and grows along the coast or river estuaries which is influenced by tides and is often found in coastal areas and sloping areas in the tropics and sub-tropics. The mangrove ecosystem is the boundary that connects land and sea ecosystems. The combination of terrestrial and aquatic ecosystems makes the mangrove ecosystem full of productive resources. As a community that forms an aquatic ecosystem, mangrove forests have multiple functions that cannot be replaced by other ecosystems, namely social, economic and environmental functions. Ecologically, the mangrove forest functions as a habitat for fish, shrimp, shellfish and other types of biota for spawning and nursery areas for shrimp species. Mangrove forests also function to maintain shoreline stability, protect beaches and riverbanks from waves, reduce the impact of hurricanes, tsunamis, and storm surges. Economically, mangrove forests provide fishery resources of commercial value, producing firewood, building materials, raw materials for charcoal, and other products of economic value. Social benefits such as places for social interaction and tourism services.
Problems that threaten the sustainability of ecosystems and the function of mangrove forests have been felt in most coastal areas of Indonesia, including in Bengkalis Regency which is one of the areas with the second largest mangrove forest in Riau Province after Indragiri Hilir. The area of mangrove forest in Bengkalis Regency is about 29.330 ha. Of the total area, about 9.973 ha or 34% are in a severely damaged condition and around 19.357 ha or 66% are in moderately damaged condition. The condition of mangrove forests in Bengkalis Regency is currently experiencing degradation, which is caused by changes in the surrounding environment and direct and indirect pressure on the existence of mangrove forests. Where the use of mangrove forests by the community does not pay attention to sustainability aspects.
This research was conducted in a mangrove forest area located on Bengkalis Island, Bengkalis Regency. The observation station consists of six villages, namely: Station 1 Desa Deluk, Station 2 Desa Selat Baru, Station 3 Desa Teluk Pambang, Station 4 Perapat Tunggal, Station 5 Pematang Duku Village and Station 6 Ketam Putih Village. This research was conducted from October 2020 to March 2021. The objective of this study are : 1) identify ecology, economic and social condition of the community around mangrove area, 2) estimate the value of economic benefits of mangrove forest; 3) analyze sustainability status of
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mangrove forest management 4) establish a suitable model of sustainable mangrove forest management in Bengkalis regency.
Based on field observations were found 16 families and 26 species of mangroves, consisting of 16 true mangrove species and 10 associated mangroves. Meanwhile the results of the research showed that the water quality parameters of mangrove forest were : average temperature ranges from 30.3°C–32.7°, average salinity ranges from 25.0 – 33.0 ‰, average pH ranges from 7.08 – 7.62, average DO ranges from 4.05 – 8.2 mg/l, average BOD ranges from 2.5– 11.55 mg/l, average Nitrate ranges from 0.57–1.45 mg/l, and average Phosphate ranges from 0.11–1.24 mg/L. The level of education and income from the communities are lower, where the level of income is below the minimum wage of Bengkalis Regency. The community already understood the benefits of the existence of mangrove forests, but it is not followed by management participation.
The results showed that the total economic value of mangrove forests was Rp84.570.119.078 per year. Consists of the indirect use value of mangrove forests obtained through direct use of mangroves of Rp73.035.931.339 per year. The indirect use value is calculated through the use of mangrove services with a value of USD 5.085.689.10 per year, the presence value is obtained through the Contingent Valuation Method (CVM) of USD 463.033.71 per year and the preferred value is calculated from the value of biodiversity with a value of USD 142.838.87 per year.
Based on Rap-BengkalisMF analysis, multidimensional index of mangrove forest management was categorized less sustainable with a sustainability index of 44.18%. Meanwhile, the result of the analysis of each dimension shows that the ecological dimension sustainability index is 40.43% (less sustainable), the economic dimension is 35.81% (less sustainable), the sustainability index of social dimension is 49.90% (less sustainable), sustainability dimension of Law-legal institution is 46.49% (less sustainable) and sustainability index of technology dimension is 48.26% (less sustainable).
Sustainable mangrove forest management model in Bengkalis Regency (M) is the result of the interaction between factors: rehabilitation and preservation of mangrove ecosystems (r), mangrove forest tourism potential (w), community participation in mangrove management (p), coordination between stakeholders (k) , and coastal abrasion prevention technology (t), which can be described in terms of the function as follows: M = f (r, w, p, k, t). Management strategies that can be carried out to increase the value of sustainability are : 1) conservation of mangrove forests into ecotourism, 2) strengthening institutional capacity through community participation and coordination between stakeholders, and 3) Abrasion countermeasures
Keywords : mangrove forest ecosystem, management model, sustainable status
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