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"Tumpahan minyak di perairan telah menimbulkan pencemaran di lingkungan laut maupun di daerah pesisir pantai, sehingga perlu dilakukan penelusuran kejadian tumpahan minyak dapat digunakan untuk mitigasi bencana. Penelitian ini bertujuan untuk mengetahui sebaran dan pergerakan tumpahan minyak di perairan Cilacap, Jawa Tengah tahun 2008, serta hubungannya dengan angin, arus, dan pasang surut. Identifikasi tumpahan minyak dilakukan dengan interpretasi citra Modis surface reflectance dengan melihat penurunan nilai spektral dan diikuti oleh peningkatan nilai fluorescence index. Tumpahan minyak menyebar di sekitar pesisir pantai Teluk Penyu Kecamatan Cilacap Selatan, Kecamatan Cilacap Utara, Kecamatan Kesugihan dan Kecamatan Adipala, dengan luas total area yang tercemar sebesar 1.378 ha. Angin merupakan faktor dominan yang berpengaruh terhadap pergerakan minyak dibandingkan dengan arus dan pasang surut. Pergerakan tumpahan minyak menyebar menjauhi lokasi sumber tumpahan dan bergerak searah dengan arah angin menuju ke arah timur. Dari kondisi oseanografis menunjukan bahwa jenis penyebarannya termasuk kedalam jenis difusi gabungan ekspansi dan relokasi.

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The oil spill in the waters has occurred pollution in the marine environment as well as in coastal areas, so needs to do investigation of occurrence oil spill which can use for disaster mitigation. This research is going to describe the distribution and movement of oil spill in Cilacap coastal, Central Java in 2008, and its relation with the wind, currents, and tides. Identification of oil spill conducted by Modis image surface reflectance interpretation by looking at the impairment of spectral and was followed increase in fluorescence index value. Distribution of oil spill spreading around at Teluk Penyu coast of south Cilacap, North Cilacap, Kesugihan, and Adipala, with a total area of 1.378 ha contaminated. Wind is the dominant factor influencing the movement of oil compared with currents and tides. The movement away from the spreading oil spill and the spill source location moves in the direction of the wind toward the east. Of oceanographic conditions indicate that the type of distribution, including the type of diffusion into the combined expansion and relocation."

"ABSTRAKTelah dilakukan penelitian mengenai analisis sebaran kelimpahan kista Dinoflagellatapenyebab HAB di lokasi budidaya kerang hijau (Perna viridis) Kamal Muara, Jakarta Utara,pada bulan Oktober 2014 di 9 titik stasiun. Tujuan dari penelitian ini adalah untukmengetahui keberadaan serta kelimpahan kista Dinoflagellata penyebab HAB, memetakansebaran spasial kista Dinoflagellata penyebab HAB, dan untuk mengetahui faktor lingkunganyang memengaruhi sebaran kista Dinoflagellata penyebab HAB. Pengambilan sampelsedimen dilakukan menggunakan Eijkman Grab, dan pemisahan kista dari sampel sedimendilakukan menggunakan metode sieving technique. Hasil penelitian menunjukkan bahwaterdapat 8 genus kista Dinoflagellata di lokasi penelitian, yaitu Alexandrium, Cochlodinium,Diplopsalis, Gonyaulax, Gymnodinium, Polykrikos, Protoperidinium, dan Scrippsiella,dimana 5 diantaranya merupakan genus penyebab HAB, yaitu Alexandrium, Cochlodinium,Gonyaulax, Gymnodinium, dan Scrippsiella. Kelimpahan kista di sedimen lokasi penelitianmemiliki kisaran antara 4--324 kista/ml. Kista dengan kelimpahan tertinggi adalah genusAlexandrium (324 kista/ml) dan terendah adalah genus Diplopsalis (4 kista/ml). Pola sebarankista di lokasi penelitian menunjukkan bahwa kista terkonsentrasi pada stasiun-stasiun diwilayah timur. Faktor lingkungan yang paling memengaruhi sebaran kista di lokasipenelitian adalah arus, sedangkan faktor lingkungan yang memengaruhi germinasi kistaadalah DO, cahaya, dan suhu.

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ABSTRACTResearch on the distribution analysis on the cyst abundance of HAB causing Dinoflagellatesat green mussel (Perna viridis) culture area in Kamal Muara, North Jakarta, has beenconducted in October 2014 at 9 sampling stations. The objectives of the research were todetermine the presence and abundance, mapping the spatial distribution, and to determine theenvironmental factors that influence the distribution of cysts from HAB causingDinoflagellates. Sediment sampling was carried out using Eijkman Grab. Cyst samplepreparation was carried out using the sieving technique. The results showed 8 genus ofDinoflagellate cysts, which were Alexandrium, Cochlodinium, Diplopsalis, Gonyaulax,Gymnodinium, Polykrikos, Protoperidinium, and Scrippsiella, in which 5 of them were HABcausing, namely Alexandrium, Cochlodinium, Gonyaulax, Gymnodinium, dan Scrippsiella.The abundance of cyst at sediments were ranged between 4--324 cysts/ml. Cyst with highestabundance was genus Alexandrium (324 cysts/ml) and the lowest was genus Diplopsalis (4cysts/ml). Cyst distribution pattern at the study site showed that cysts were concentrated atstations located in the eastern region. Environmental factors that mostly influence thedistribution of cysts in the study site was water current, whereas environmental factors thataffect the germination of cysts was DO, light, and temperature."

"The purpose of this study is to clarify the ecosystem quality of Bayur Bay based on heavy metallic elements in surface sediment. Samples were collected using grab sampler from four stations in Bayur Bay. Concentration of heavy metallic elements were determined using ASS. Results of linier regression analysis show negative correlation between Cd concentration and mean size diameter. COntrastingly, Pb has correlation with size diameter. Cd and Pb concentrations in surface sediment of Bauyr Bay are lower than the ERL and ERM indicating it is not yet polluted."