Primary Productivity of Tanjung Balam Lake, Buluh Cina Village, Siak Hulu Sub-Regency, Kampar Regency, Riau Province Based on Oxygen Method

Abstract

ABSTRACT 

Tanjung Balam lake is an oxbow lake located beside the Kampar River and receive water from that river. A research aims to understand the primary productivity based on oxygen method and the thropic statebased on carbon concentration (gC/m³/day) was conducted in June-July 2019.  There were three sampling stations, station 1 (inlet), station 2 (middle) and station 3 (outlet). In each station there was 2 sampling points, in the surfase (15 cm) and in the water column (90 cm). Water quality parametersmeasurd were transparency, temperature, pH, dissolved oxygen, CO₂ free, nitrate, phospate concentration and phytoplankton abundance. Results shown that the primary productivity was 488.8889-681.9444 gC/m³/day, transparency was 49-54 cm, temperature was 28-30⁰C, pH was 5, dissolved oxygen was 4.03-6.56 mg/L, CO₂ free was 7,92-14,59 mg/L, nitrate was 0.015-0.029 mg/L, phospate was 0.082-0.107 mg/L and phytoplankton abundance was 845,502-1,037,218 cells/L. Based on primary productivity concentration, this lake can be categorize as mesothropic condition.

 Keywords:Oxbow Lake, Water Quality, Phytoplankton, Mesothropic