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Coastal of Banyuasin is one of the centers of capture fisheries in South Sumatra Province. This area had the potential of fisheries resources that must be preserved. Many fishermen are depend their lives on this area, but some activity along Banyuasin River such as settlement, industry, agriculture and transportation has affected the quality of water. This study aims to examine the conditions of nitrate, nitrite, ammonia, phosphate and BOD in the Coastal of Banyuasin. Sampling was conducted in September 2017 covering 22 research stations, sample analysis conducted at Palembang Institute for Industrial Research and Standaritation Laboratory refers to SNI. The results showed that the concentration of nitrate during the study ranged from 0.025-3.21 mg.L -1 , nitrite 0.002-0.093 mg.L -1 , ammonia 0.002-0.031 mg.L -1 , phosphate 0.011-0.231 mg.L -1 and BOD 2.14-8.73 mg.L -1 . The concentration of nitrate and phosphate in Banyuasin River estuary were exceeded quality standards while nitrite, ammonia and BOD were still below specified quality standards. ABSTRAKPesisir Banyuasin merupakan salah satu sentra perikanan tangkap di Provinsi Sumatera Selatan. Kawasan ini menyimpan potensi sumber daya perikanan yang harus dijaga kelestariannya. Banyak nelayan yang menggantungkan hidupnya di kawasan ini, hanya saja ragam pemanfaatan di sepanjang aliran Sungai Banyuasin seperti pemukiman, industri, pertanian dan transportasi telah mempengaruhi kualitas perairan. Penelitian ini bertujuan untuk mengkaji bagaimana kondisi nitrat, nitrit, amonia, fosfat dan BOD di Pesisir Banyuasin. Pengambilan sampel dilakukan pada bulan September 2017 meliputi 22 stasiun penelitian, analisa sampel dilakukan di Laboratorium Balai Riset dan Standardisasi Industri (Baristand) Palembang merujuk pada SNI. Hasil penelitian menunjukkan konsentrasi nitrat selama penelitian berkisar antara 0,025-3,21 mg/L, nitrit 0,002-0,093 mg/L, amonia 0,002-0,031 mg/L, fosfat 0,011-0,231 mg/L dan BOD 2,14-8,73 mg/L. Konsentrasi nitrat dan fosfat telah melebihi baku mutu yang ditetapkan, adapun untuk parameter nitrit, amonia dan BOD masih dibawah baku mutu.

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The mangrove forest of TAHURA Ngurah Rai is one of the mangrove ecosystems in Bali that suffered damages and density changes due to natural factors and human activities. Remote sensing is one of the technology that can be used to estimate the density of mangrove canopy in TAHURA Ngurah Rai. The purpose of this study was to find the best vegetation index for estimating mangrove canopy density out and map it spatially using Sentinel-2A image. The method of this research is using vegetation index NDVI, EVI and mRE-SR to estimate mangrove canopy density. Field data was collected using Stratified Random and Proportional Sampling method by taking photo of the density of canopy using camera with Fish Eye lens on 34 plot. The results of this study show the satistic test of the linear model of the vegetation index with the mangrove canopy density value on the NDVI index (r = 0.8165, R2 = 0.6667, RMSE = ± 8.1508), EVI (r = 0.8597, R2 = 0.7390, RMSE = ± 7.8117), and mRE-SR (r = 0.9277, R2 = 0.8607, RMSE = ± 4.9571). The conclusion of this research is mRE-SR vegetation index able to map mangrove canopy density better than NDVI and EVI vegetation index with 86.07% accuracy. The mangrove spatial distribution generated from the mRE-SR model is 1002.22 Ha with 3.24 Ha categorized as very high density, 94.82 Ha categorized as high density, 333 Ha categorized as medium density, 402.38 Ha categorized as low density, and categorized as very low density is up to 168.76 Ha.

The purpose of this study was to assess the fish biodiversity of Sungsang estuaries in South Sumatra. The species diversity, evenness, dominance, degree of similarity, and composition of fish communities as well as some physicochemical conditions were analyzed in order to establish the baseline data inventory of Sungsang estuaries. The results show that all of the physico-chemical parameters were in good condition for fish sustainability. Forty-eight (48) species of fish belonging to 29 families of freshwater, brackish water and marine sources were encountered in the water bodies. Johnius belangerii, Johnius amblycephalus and Setipinna taty were species with a relatively high abundance, but the appearance frequency of these species was high, medium and low, respectively. The value of the Shannon’s diversity index for fish resources was classified as moderate (H’=1.477-2.708). The index value of evenness was classified as high (J’= 0.616 – 0.876), while the index value of dominance was classified as low (D = 0.097 – 0.382). This result indicate that the species diversity was good enough, the species spread was evenly distributed, that there was a stable community structure and no domination.

Human activity is the most contributor of carbon dioxide gas (CO2) to the air. The oceans have an important role in the carbon cycle, about 93% of the Earth's CO2 is stored in the oceans. Seagrass is one of sea plants that has a role as carbon sinks in ocean. Seagrass beds are able to absorb carbon by an average 0.21 tons/ha and the important species are Enhalus acoroide. The aim of this study is determine the carbon storage in seagrass at aboveground (leaf), belowground (roots and rhizomes) and carbon storage on each species of seagrass obtained at Mengiat coastal area. Determination of sampling point refer to seagrass density that used by purposive sampling. This method was assumed to represent or describe the condition of this area. This research used dry dyeing method which components sample was destruction with 500oC inside the furnace. The results showed that carbon storage of seagrass at belowground (root and rhizoma) is 25.70 gC/m2, and aboveground (leaf) is 17.18 gC/m2. Carbon storage at belowground is higher than aboveground because carbon will accumulate in the sediment. The type of seagrass that is obtained at Mengiat coastal area is Thalassodendron ciliatum, Thalassia hemprichii, Cymodocea serrulata, Halodule uninervis, Cymodocea rotundata, and Syringodium isoetifolium, the highest carbon storage are 62.46 gC/m2 is owned by Thalassodendron ciliatum, and the lowest carbon storages are 17.25 gC/m2 is owned by Syringodium isoetifolium.