Water Quality Analysis Based on Plankton Community Structure in Kampar River, Riau Province

Abstract

It is suspected that there has been pollution in the Kampar River as a result of land conversion. To determine the quality of Kampar River water, one of the parameters that can be used is a biological indicator, namely plankton. The research was conducted in July 2017 - July 2018 with the purposive sampling method at 3 observation stations. Plankton samples were analyzed using the Diversity Index (H ′), Dominance (C), and Uniformity (E). From the results, it is known there are 13 types of plankton consisting of 2 classes: Bacillariophyceae (5 types) and Chlorophyceae (8 types). Abundance ranges from 7250-11500 cells/L with the genus Scenedesmus sp. has the greatest abundance. The diversity index value is included in the low to the medium category (1.9306-2.4574). The population dominance obtained from all stations is in a low category (<0.4). The population uniformity of the three stations shows a value that falls into the high category (>0.6), so it can be said that the uniformity of the plankton population in the Kampar River is high. From these results, it can be concluded that the Kampar River water body in this study belongs to the polluted category. This is also supported by the findings of the genus Synedra sp. at Station 2. This genus can live in a low DO condition and serve as an indicator of pollution. Although the abundance is low, the presence of this genus indicates that this area has experienced a decrease in water quality or pollution.