DOI: 10.36347/sajb.2017.v05i06.001

Pages: 393-401

Seagrass Ecosystem is the one coastal region that important for coastal communities in Kupang Bay, West Timor, Indonesia. This study aims to determine the effect of human activity on the ecological and economic role of the seagrass ecosystem in the coastal area of Kupang Bay. The method used in this research is a direct observation method in the field. The result of this research is to find an activity which often done in the coastal area of Tablolong Village, Bolok Village and Namosain Village that influence seagrass resources are settlement activity such as waste disposal and waste that leads to the sea, industrial activity, shipping activity, sea transportation activity, seaweed cultivation activity and catching biota in intertidal (makameting). Furthermore, community activities in coastal areas of Kupang Bay affect the ecological role of seagrass ecosystems. According to diversity index, index of uniformity and index of dominance, known that the condition of the seagrass community structure in Bolok Village and Tablolong Village has been under moderate to severe pressure condition, while in Namosain Village has been under heavy pressure. In addition, community activities in Kupang Bay, affect the economic role of seagrass ecosystems, seen from the decline in economic value of seagrass ecosystems in 2010 until 2014.