Keanekaragaman Plankton Danau Siombak Kecamatan Medan Marelan Kota Medan

Abstract

Siombak Lake is an artificial lake located in KelurahanRengasPulau, Medan Marelan, is 18 km north of the center of Medan. Plankton is one of the main components in the food chain and food web. The purpose of this research is to know the diversity of plankton community, the value of water chemistry physics parameters, and the correlation between water chemical physics factor with plankton at Lake Siombak Medan Marelan Sub-district Medan City. The research was conducted at Siombak Lake in September 2015. Plankton and plankton water quality data including temperature, pH, brightness, dissolved oxygen (DO), BOD5, NH3, and phosphor grades were obtained from the field and analyzed in the laboratory. The method used in determining the sampling location for plankton sampling is "Purposive Sampling" at 5 (five) observation stations. The value of plankton diversity index obtained at Lake Siombak is Station 1: 3.05145, Station 2: 3.14593, Station 3: 3.10679, Station 4: 3.07244 and Station 5: 3.1212. Temperature, pH, BOD, Salinity, DO, Brightness are in the range of quality standards, while nitrate and phosphate exceed the quality standard.