PADANG LAMUN SEBAGAI EKOSISTEM PENUNJANG KEHIDUPAN BIOTA LAUT DI PULAU PRAMUKA, KEPULAUAN SERIBU, INDONESIA

Abstract

Coastal ecosystems generally consist of 3 constituent components, namely seagrass, coral reefs, and mangroves. These three ecosystems make the area in the coastal area a relatively fertile and productive area. Seagrass are coastal ecosystems that have high biological productivity and play an important role in the ecological and physical functions of the environment in coastal areas. Ecologically, seagrass act as nursery ground, feeding ground for small fish, turtles, sea urchins, and other marine organisms, as well as shelter for various types of marine organisms. Physically, seagrass act as vegetation that maintains stability and holds sedimentation in coastal areas, reduces and slows wave movements, and occurs as a nutrient cycle, and it can be said that seagrass ecosystems are one of the ecosystems in the shallow sea that has high productivity. In addition, seagrass have a function that is no less important and is quite widely studied at this time, namely its function as carbon sinks or Blue Carbon (Karawoe, 2009). Seagrass ecosystems have an important role in supporting the life and development of marine organisms in shallow oceans, for example such as in Pramuka Island. Research on the role of seagrass as a supportive ecosystem for marine organisms in Pramuka Island was carried out with direct research into the field on December 6, 7 and 8, 2019. From the results of the research, we found that there were 4 types of seagrass in Pramuka Island, precisely in the eastern area in Pramuka Island, namely Cymodocea rotundata, Cymodocea serrulate, Enhalus acoroides, and Enhalus hemprichii. The four types of seagrasses have an important role in the seagrass ecosystems, especially in supporting the life of marine organisms in Pramuka Island.