DOI: 10.36347/sajb.2019.v07i09.001

Pages: 355-360

Seagrass is the one of important coastal ecosystem in Siput Island, Lembata, East Nusa Tenggara, Indonesia. The study aims were to determine the composition of seagrass species and the physicochemical of waters are important for design sustainable management resource of Siput Island. The method used in this study is field observation using line transect. The results of this study have found three species of seagrass around the waters of Siput Island i.e. Enhalus acroides, Thalassia hemprichii and Halophila ovalis, with the composition were 73.33 %, 46.67%, and 66,67% respectively.. While the range of the waters physicochemical i.e. temperatures: 30−33 ᵒC, salinity 32−33 ppt, and pH 7.3−8.5, whereas the species of substrate was muddy sand. The condition of the waters physicochemical and type of substrate are supporting the life and development of seagrass communities and other organisms associated in this ecosystem.