| dc.description.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. | en_US |
