Produktivitas Primer Perairan di Estuari Kecamatan Talawi Kabupaten Batu Bara

Abstract

Primary Productivity is the formation process of organic compounds through photosynthesis. This research aimed to know primary productivity based on the concentration of chlorophyll-a, phytoplankton identification and it’s abundance at the estuarine of Kecamatan Talawi Kabupaten Batu Bara. The identification of phytoplankton is known by an observation using Sedgewick Rafter. The water sampling is conducted three times in two weeks interval during April until Mei 2014. The location determination used the Purposive Sampling method and the water sampling used Space Composite Sampling method for chlorophyll-a, phytoplankton, salinity, total suspended solid, nitrate and phosphate. From the research results there are 5 class of phytoplankton were 17 families and 25 species. Most of phytoplankton are contain in Bacillariophyceae. The highest species abundance is 1073,889 ind/l found at station 3, and the species that have the highest abundance is Skeletonema sp. The highest chlorophyll-a value is 0,89 mg/m3 at station 3.