TYPE AND ABUNDANCE OF PERIPHYTON IN THE KOTO PANJANG DAM, XIII KOTO KAMPAR DISTRICT, KAMPAR REGENCY, RIAU PROVINCE

Abstract

Periphyton is a type of algae that commonly inhabit the surface of any immersed objects. A research aims to understand types and abundant of periphyton in the Koto Panjang Dam has been conducted in Oktober to November 2012. Sampling were conducted 3 times, once/week, at 4 stations, namely St I, (riverine), St II (transitions) and St III (lakustrine) and St IV (lacustrine). Periphyton samples were taken by scraping the surface of the immersed wood using a tooth brush ( 5x5 cm2 ). Periphyton collected were then preserved using lugol 1% and then identified based on Hiroyuki et al., (1977) and Yunfang (1995). Result shown that the periphyton obtained were consisted of 38 species, they are belonged to 4 classes, namely Cyanophyceae (12 species), Chlorophyceae (12 species), Bacillariophyceae (11 species) dan Xanthophyceae (3 species). The most common periphyton in each sampling site was Rivularia globiceps. Based on periphyton abundance (21,775 - 42,792 cell/cm2), the Koto Panjang dam can be categorized as eutrophic . In general, the H’ was 1,96 - 2,23; E was 0.82 - 0.89 and C was 0.13 - 0.20. Water quality in the the dam was good, as the temperature was 25-35 0C; brightness was 26.5-118.5 cm, current speed was 0.01-0.29 m/sec, pH was 6, free Carbon Dioxide was 2.11-10.56 mg/l, nitrate was 0.02-0.08 mg/l and Phosphate was 0.02-0.05 mg/l. Based on data obtained, it can be concluded that the periphyton in the dam is growing well and the water quality is suitable for the life of that organism.