KOMPOSISI FITOPLANKTON YANG TERDAPAT DI PERAIRAN BATANG PALANGKI KABUPATEN SIJUNJUNG

Abstract

Phytoplankton is water plant which floats freely and float away in water and able to photosynthesis. Phytoplankton has important role since it become food for animals are life in that water, such as fish and insect. Morever, phytoplankton is able to influence the quality of water. There are some houses, livestock market and farmland. Water of Batang Palangki river is used to fulfill daily needs, means of gold mining, sand, bathing place for livestock and fish catching. A research has been done in Batang Palangki river. Its purpose is to know the phytoplankton composition in Batang Palangki river. This research was conducted by using descriptive survey method which chose four research stations that is station I settlement area, station II farm, station III gold mining area and station IV post area of gold mining. Sample was selected in 3 spots for each station, namely left, right and center of river. Parameter which was measured was abundance, relative density, frequency and relative frequency, and quality parameter of water which was measured was temperature, pH, the flow of speed, DO, and CO2. From the result of this research, it was found that the phyotoplankton composition was 4 classes, 4 ordo, 9 families and 13 genus. Total abundance was 24,68 individu/l, abundance is highest in station II was 8,34 individu/l, and then station I was 7,98 individu/l, station IV was 4,93 individu/l and station III was 3,43 individu/l. Class that highest abundance was Bacillariophyceae, was 16,55 individu/l and minimal low was Euglenophyceae, was 0,46 individu/l. Genus that highest abundance was Navicula, was 4,78 individu/l and minimal low was Phacus was 0,46 individu/,.