Keanekaragaman Makrozoobentos Sebagai Bioindikator Kualitas Air di Aliran Sungai Bilah Rantauprapat

Abstract

Sungai bilah is lhe largest river is of rantauprapat labuhanbatu North Sumatra Province and is located right in the densely populated urban areas. There are so many community activities that take place such as the Baths, Water supplay Comparry (PAM), san Mining, Agriculture, Transportation and Fisheries. The purpose of this study was to determine the diversity mobozoobentos as an bioindicator of water quality in Rantauprapat blades, as well at determining the quality of the river flow by the blades Rantauprapat physical properties, chemistry and biology has. This study was conducted from January 2012 to March 2012, samples taken from the research stations. Decision point is determined by the method of purposive random sampling- Samples were taken by using a mesh surberner and then in the identification in the laboratory PSDAL Department of Biology, Faculty of Mathematics and Natural sciences, University of North Sumatra, Medan From the research results obtained malsozoobbentos which consisting of4 grades 7 orders, 11 families and 12 genera. The highest density value is a genus of Neanthes sp 18.519 individu/m2 found at station 4 and genus of 18.519 individu/m2 sp tubifex were found at station. I while the genus with the lowest density of 1.235 sp Pleurocera individu/m2 found at station 4 . The value of diversity index (H’) highest mabozoobentos I found the station 1 at 2.052 at the lowest at station 5 at 0.965. Person correlation analysis of the results showed that the DO, BOD5, Nitrate, Phosphate, COD, Substrare, Light Penetration, The solubilty of oxygen, TSS, and TDS mabozoobentos diversity was positively correlated with pH and temperature while negatively correlated.