The coastal is frequently impacted by marine litter that damages marine wildlife and causes economic loss to fishing and maritime industries. In this study, we described the quantity of marine litter in the inner and outer of Ambon Bay. The Sampling was carried out in September 2017. The beach litter sampling was handled by the line transect method combined with the quadrant method in 8 sites; the observation of floating litter was conducted manually with boat sampling and visual observation in a seven-line trajectory. About 2359 items of coastal litter were found in seven sites in Ambon Bay with a mean density of 18.87 items.m -2. These beach litter belonging to five categories were counted (plastic, glass, metal, cloth, paper). The highest abundance of beach litter was found in the inner Ambon Bay with a mean density of 68.74 items per m2. Plastic was the most abundant beach litter observed. Based on Clean Coast Index (CCI) evaluation, all coastal sites in Ambon Bay were identified as Very Dirty, that is most of the coastal is covered with litter. The highest floating litter was found near the market. The abundance and distribution of litter through Ambon Bay seem to be influenced by the local human population, anthropogenic activities, and seawater circulation in inner and outer Ambon Bay.

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<p>Weda Bay located  at Halmahera Island, North Maluku was rich in fishes, sea cucumbers, crabs, shrimp, and alge resources. Research on diversity and density of echinoderms at Weda Bay, North Maluku was limited and therefore it was lack on data and information of the biota. The purpose of this study was to determine the diversity and density of echinoderms at Weda Bay, North Maluku. This research was conducted in March 2013 including transects and free collection of 6 stations contained echinoderms. The results showed that the overall echinoderms were found 23 species of 17 generas, 12 families, 10 orders, and 5 classes. Based on classes, the highest density of echinoderms was Asteroidea of 0.0456 ind/m² (43.76 %) foundin the seagrass sand  habitat.  Meanwhile,  the  lowest  density was  Crinoidea  of 0.0002 ind/m²(0.19%) found in corals habitats.</p> <p>Keywords: diversity, density, echinoderms, Weda bay, North Maluku.</p>

Perairan pulau Keffing memiliki ekosistem mangrove, ekosistem lamun, maupun ekosistem karang yang masih relatif baik, perairan pantai pulau Keffing didominasi oleh habitat pasir, pasir kasar dan lumpur yang sangat menunjang kehidupan fauna ekinodermata. Penelitian tentang ekinodermata di perairan pulau Keffing perlu dilakukan mengingat akhir-akhir ini kurangnya data dan informasi tentang biota tersebut. Tujuan dari penelitian ini adalah untuk mengetahui keberadaan, dominasi dan kepadatan ekinodermata di perairan pulau Keffing. Penelitian ini dilakukan pada bulan Nopember-Desember 2018, pengambilan sampel dilakukan dengan metoda transek kuadrat dan koleksi bebas pada 3 lokasi di perairan pulau Keffing.  Hasil penelitian menunjukan bahwa ekinodermata yang dijumpai berjumlah 7 jenis, 7 famili, dan 4 kelas. Nilai dominasi tertinggi sebesar 0.003 yang menunjukan bahwa terdapat dominasi spesies tertentu yaitu Holothuroidea. Sedangkan kepadatan ekinodermata berdasarkan kelompok kelas pada perairan pulau Keffing tertinggi pada kelas Holothuroidea, famili Stichopodidae dari jenis Stichopus variegatus sebesar 0,705 ind/m2 yang didominasi oleh habitat pasir yang ditumbuhi lamun.

Ambon City, the capital of Maluku Province, is a coastal city where most of the land is the Ambon Bay coastal area. Along with the increase in population, Ambon City also continues to grow. Global sea-level rise is now likely to receive attention because of the impact it may have on coastal areas. By 2100, it is projected that sea levels will rise to 1.1 meters from the current sea level. As a coastal city, the trend of sea-level rise should be taken into account in the development of Ambon City. Visual analysis of the Ambon Bay satellite imagery from Google Earth and video recordings published on social media and the results of field observations of the Ambon Bay coastal area show that: (1) the coastal lowlands in the Ambon Bay coastal area have developed into densely populated built areas; (2) Ambon City is growing towards hilly areas; (3) along the coast of Ambon Bay, there are efforts to carry out reclamation and build coastal defense structures which are carried out personally by the coastal land authorities. This tendency has implications for (1) the decline in the environmental quality of the coastal area of Ambon Bay in several locations; and (2) increasing the level of vulnerability of coastal areas to hazards that may arise due to sea-level rise along the coast of Ambon Bay if the sea level rise scenario above actually occurs