Status Trofik Danau Lubuk Siam Berdasarkan Indeks Nygaard

Nygaard Index can be used to determine the trophic state of waters. Calculation of this index is based on the number of phytoplankton species in these following groups, namely Desmidiaceae, Myxophyceae, Chlorococcales, Centric diatom, Pennate diatom and Euglenophyceae. To understand the trophic state of the Lubuk Siam lake, a research has been conducted in February - March 2017. There were thre…