Primary productivity analysis of phytoplankton and community structure of macrobenthos based on mangrove density in the conservation area of Tarakan City, East Kalimantan

Abstract

Abstract. Taqwa A, Supriharyono, Ruswahyuni. 2013. Primary productivity analysis of phytoplankton and community structure of macrobenthos based on mangrove density in the conservation area of Tarakan City, East Kalimantan. Bonorowo Wetlands 3: 30-40. The studies of primary phytoplankton productivity and macrobenthic fauna community structure in different densities of mangrove were carried out from May to June 2009 in the mangrove conservation area in Tarakan East-Kalimantan, Indonesia. Content of chlorophyll-a converted to phytoplankton primary productivity, estimated with Strickland formula. Diversity of macrozoobenthos calculated with Shannon’s Index. Phytoplankton primary productivity in high, middle, and low mangrove density ranges between 50.13±5.53 mgC/m³/d; 45.32±6.48 mgC/m³/d, and 41.48±6.48 mgC/m³/d, respectively. Shannon’s low, middle, and high mangrove density index values are 2.24-2.61, 1.33-2.51, and 1.35-2.51, respectively. This study showed a strong correlation between the diversity of macrozoobenthos and the density of mangroves.