RELATIONSHIP OF WATER QUALITY WITH PHYTOPLANKTON ABUNDANCE IN KENJERAN COASTAL WATERS, SURABAYA, EAST JAVA, INDONESIAANJANI ARUM MAHENDA, PUTU ANGGA WIRADANA, RADEN JOKO KUNCORONINGRAT SUSILO, AGOES SOEGIANTO, ARIF NUR MUHAMMAD ANSORI AND NOVIA ARINDA PRADISTYAbstract Phytoplankton play an important role as a bioindicator of water quality. Its abundance is also considered a primary source of feed for these aquatic organisms. This study aims to measure the water quality and phytoplankton abundance and to know their relationship in Kenjeran coastal areas, Surabaya, East Java, Indonesia. This study was conducted in 3 stations (Kedung Cowek, Sentra Bulak, and Surabaya Bridge) for sample collection. The water quality parameters of temperature, brightness, salinity, dissolved oxygen (DO), pH, phosphate (PO4 3-), and nitrate (NO3 - ) values were measured. Phytoplankton was collected using plankton net and counted using Sedgwick-Rafter cell. Relationship of water quality with phytoplankton abundance were analyzed using the Pearsonâs correlation test on SPSS 21 software and Principal Component Annalysis (PCA), while images and tables were presented using MS. Excel program. Station 1 showed the highest abundance of phytoplankton and diversity index of 539.2 Ind/L and 2.03 Hâ, respectively. Meanwhile, the highest phytoplankton population was found in the Bacillariophyaceae group. The correlation analysis results showed a significant correlation between the Dinobryaceae group and pH parameters. It can be concluded that Station 1 has the good water quality compared to the other two stations based on the results of monitoring conducted. |