Jenebora was one of the areas directly affected by the oil spill in the waters of Balikpapan Bay in 2018. It is estimated that almost 80% of the mangroves in the area were damaged. Oil spills into the sea have the potential to have a negative impact on the survival of the flora and fauna in it. This study aimed to measure the economic impact of the oil spill in Balikpapan Bay on the utilization and management of mangrove resources in Jenebora Village, Penajam Paser Utara. Economic valuation is a form of analytical approach used to assess the economic impact of mangrove damage. The results showed that the damage caused by the oil spill on the mangrove ecosystem was estimated a Rp. 41,082,027,068/year or Rp. 2,334,206,083ha/year. This value is estimated from the loss of fish resources that have economic value, as well as the damage to the function of the mangrove ecosystem as archery abrasion, reducing pollution and producing carbon. The policy recommendations in this study are the need for actions and rules related to the management and control of marine pollution that are integrated with other regulations, the need for Pertamina to improve equipment maintenance and immediately carry out post-event environmental restoration and ensure the allocation of fishing areas for traditional fishermen and continuous assistance to environmental recovery.

The Mangrove ecosystem in Tanjung Batu village subdistric of Derawan Island had the natural resources potency that must be managed to gain ecology and economy benefits for the society. The purpose of research was 1) to identify the mangrove utilization by the society in Tanjung Batu village, 2) to analyze mangrove ecosystem economic value based on its use value and 3) to know society perception to mangrove ecosystem utilization pattern. The research was conducted from December 2017 to June 2018. The number of respondents was 65 persons that selected purposively, consisted of 35 fishermen and 30 community members. The use value of ecosystem mangrove was analyzed by consumer surplus and productivity methods, while the community perception analyzed descriptively. The result of study showed that the value of direct utilization of the mangrove ecosystem as a producer of fish and crab resources was Rp. 8.470.764.106/year.

Kawasan perairan Labuan Cermin adalah salah satu tujuan wisata unik di  Kabupaten Berau, Kalimantan Timur, yang terletak di daerah pesisir dan memiliki pemandangan yang indah.  Penelitian ini bertujuan untuk : 1) mengidentifikasi kesesuaian lahan dan menentukan daya dukung kawasan Labuan Cermin untuk mengembangkan model ekowisata berkelanjutan; 2) menganalisis nilai manfaat ekonomi dari kegiatan ekowisata dan 3) menetapkan prioritas strategi dalam mengelola ekowisata berkelanjutan. Penelitian ini dilakukan dari bulan Januari sampai Mei, 2016. Pengumpulan data menggunakan metode survei dan 60 wisatawan diwawancarai dengan menggunakan metode accidental sampling. Metode analisis data terdiri dari matriks kesesuaian lahan, analisis daya dukung, analisis nilai ekonomi pariwisata dengan menggunakan metode biaya perjalanan dan penetapan prioritas strategi pengelolaan ekowisata berkelanjutan menggunakan SWOT dan QSPM. Hasil penelitian menunjukkan bahwa Labuan Cermin sesuai/cocok untuk kegiatan ekowisata di mana indeks kesesuaiannya adalah 78%. Penelitian ini juga menemukan bahwa jumlah ideal turis yang diperbolehkan beraktivitas sebanyak 46 orang / hari. Rata-rata jumlah wisatawan yang berkunjung adalah sebanyak 12.000 orang turis / tahun, jumlah ini tidak melebihi dari daya dukung diizinkan yaitu sebanyak  16.576.000 orang turis / tahun. Selanjutnya, nilai manfaat ekonomi ekowisata dari kawasan Labuan Cermin berdasarkan metode biaya perjalanan adalah sebesar Rp 1.656.780.274,11 / tahun. Prioritas strategi pertama dalam mengembangkan ekowisata berkelanjutan di perairan Labuan Cermin adalah merevitalisasi peran lembaga lokal (Lekmalamin) dengan meningkatkan kapasitas teknis, manajerial dan sosial ekonominya.Title: Policy Analysis Of Sustainable Ecotourism DevelopmentIn Labuan Cermin Waters - Berau Regency, East KalimantanLabuan Cermin waters is one of unique tourist destinations in Berau, East Kalimantan, that is located in coastal area and has a beautiful landscape. The research objectives were: 1) identifying the land suitability and determining the carrying capacity of Labuan Cermin for sustainable ecotourism modelling; 2) analysing the ecotourism value and 3) establishing priority strategies for managing sustainable ecotourism. This research was conducted from January to May – 2015. Data collection applied survey method and 60 tourists were interviewed using accidental sampling method. Data analysis methods consisted of land suitability matrix, carrying capacity analysis, tourism economic value analysis using travel cost method and priority strategies of sustainable ecotourism management using SWOT and QSPM methods. The results showed that Labuan Cermin was suitable for ecotourism in which the index of suitability was 78%. This study also determined the number of allowed tourist were 46/day. The average number of tourists were 12.000 tourists/year, while not exceeding from allowed carrying capacity were 16.576.000 tourists/year. Furthermore, the ecotourism economic benefit value of Labuan Cermin based on travel cost method were IDR 1.656.780.274,11/year. The first priority strategy in developing sustainable ecotourism in Labuan Cermin waters was to revitalize the role of local institution (Lekmalamin) by improving its technical and socioecomic  capacity.

Tiga spesies tanaman sayur, kangkung darat (Ipomoea reptana), sawi (Brassica juncea), dan kemangi (Ocimum basilicum) dibandingkan guna mengonversi ammonium dan nitrat nitrogen dari sistem akuakultur. Tanaman tersebut ditanam secara hidroponik menggunakan teknik rakit (rafting technique) dengan tata letak rancangan acak kelompok lengkap (RAKL). Hasil percobaan menunjukkan bahwa tingkat konversi nitrogen oleh ketiga jenis tanaman berbeda secara nyata dengan tingkat retensi nitrogen tertinggi pada tanaman kangkung sebesar 0,73±0,28 g; diikuti oleh kemangi (0,30±0,17 g); dan terakhir oleh sawi (0,03±0,07 g). Secara keseluruhan ketiga tanaman mampu menyisihkan limbah nitrogen sebesar 6,70% dari total produksi TAN dari sisa metabolisme ikan yang dibudidayakan.

The purposes of this study were to determine the perceptions of the public and tourists on the Whale Shark ecotourism development project (Rhincodon typus), to identify the costs and benefits of the Whale Shark ecotourism development project (Rhincodontypus), to assess the financial feasibility of Whale Shark ecotourism (Rhincodontypus) based on investment criteria that include Net The Present Value, Internal Rate Of Return, Net BC Ratio and Payback Period, identify the main problems that occur in Whale Shark ecotourism (Rhincodontypus) in Talisayan Subdistrict, Berau District. The sampling method used was a purposive sampling method with 30 respondents. The method of data analysis uses descriptive methods based on graphs and financial feasibility analysis. The results of this study indicated that the perception of the community and tourists towards the development of ecotourism of the whale shark (Rhincodon typus) is that strongly agree with the existence of the project. The costs of infrastructure development projects for the development of ecotourism of the Whale Shark (Rhincodon typus) namely investment and operational costs consist of fixed costs and variable costs, where as the benefit of the project in economic terms can open up new jobs for local communities. In the mean while, the village popularity is becaming more famous around local tourist and foreign tourist. Infrastructure development projects for the development of the Whale Shark (Rhincodon typus) ecotourism with Net Present Value investment criteria of Rp.257,559,474, Internal rate of Return of 13%, Net Benefit Cost Ratio of 1,434 and Payback Period of 3 years are feasible to run. The problems were the access road to the location of the Whale Shark (Rhincodon typus) ecotourism and poor lighting on the road.