Dini Fathia. 08051381722115. Primary Productivity Analysis Based on Measurement of Phytoplankton Abundance and Chlorophyll-a Concentration in the waters of Tangkil Island, Lampung (Supervisors: Tengku Zia Ulqodry, S.T, M.Si, Ph.D and Ellis Nurjuliasti Ningsih, M.Si) The high potential of natural resources in the waters of Tangkil Island is an indication of the fertility level of the waters. The…