Studi Keanekaragaman Plankton di Perairan Danau Lau Kawar Desa Kuta Gugung Kecamatan Simpang Empat Kabupaten Karo

Abstract

The aimed of this research were to investigate the plankton diversity in Lau Kawar Lake and to find the relation among the values of physics and chemical factors of water with plankton diversity index. This research had been done on April 2008 at 4 sampling stations. The sampling was done from 3 different depths, which are 0 m, 1,5 m and 3 m for each station. Plankton net was used to filter water samples which was containing planktons. The identification result showed that from all station the highest density index is goes to genus Sphaerocystis at station I with value 717,18 ind/l. The lowest density index is genus Arcella at station II with value 1,27 ind/l.The highest value of index diversity is 2,20 at station II, and the lowest one is 1,82 at station IV. From all depths the highest density index is goes to genus Glenodium with value 915,91 ind/l. in 0 m depth and the lowest density index is taken hold by some genus, which are Trachelomonas in 0 m depth, Metis, Pediastrum, Bumilleriopsis in 1,5m depth, Metis and Spirogyra in 3 m depht with value 1,27 ind/l for each genus. The highest value of index diversity is 2,04 in 1,5 m and the lowest one is 1,86 in 0 m depth. According to the analysis of Pearson Correlation, Dissolved Oxygen and Oxygen Saturation have significant correlation to the diversity of plankton. While according to statistical test-Anava (Variance Analysis) there’s no significant difference of plankton diversity among each station, and among depth are not either.