Jurnal Nasional Sinta 4

Abstract

ABSTRACT Water quality, natural feed in the form of phytoplankton, and zooplankton were used as indicators of water fertility that affect the cultivation activity. The study aims to determine the quantity, quality of phytoplankton and zooplankton in post coal mining ponds. The research method was done by observing the water quality in situ and ex situ in the post-coal pond at Loa Bahu coal mining. Plankton sampling was taken in every 3 days for 10 timesand analyzed at laboratory to identify their species, calculate their abundance, diversity index, uniformity and dominance. The analysis shows that the number of phytoplankton was 3,039–3,379 indv / liter; zooplankton was 4,508–5,146 indv / liter. Phytoplankton dominated by Chlorophycea, which reflects the quality of clean water. Plankton diversity index was 2.718-2.684, including moderate category. Uniformity index of plankton was 0.8419-0.8618, including stable category. The results of water quality analysis such as temperature, dissolved oxygen, pH, NO2, H2S were still reasonable for cultivation while NH3 exceeds of the standard. Keywords: Phytoplankton, Zooplankton, Natural Feeds, Water Quality, Post Coal Mining Pond ABSTRA