Keanekaragaman dan Distribusi Plankton di Perairan Muara Desa Belawan I Kecamatan Medan Belawan

Abstract

The diversity and distribution of plankton and its correlation to the physical and chemical parameter of water in the estuary of the village of Belawan I, sub-district of Medan Belawan was studied from September to October 2013. Sample was collectied from three stations which were settled by using purposive random sampling method. There were nine classes of plankton consisted of 21 families and 22 genera. Of all genera found from this study, 5 genera namely, Peridinium, Gonatozygon, Diacyclops, Closteriopsis and Ulothrix performed the highest distribution in every stations. The highest diversity index recorded in the third station with the number was 2,34 and the lowest in the first station with the number was 2,16. The highest equitability index recorded in the third station with the number was 0,81 and the lowest in the first station with the number was 0,76. The highest distribution index recorded in the second station with the number was 1,69 and the lowest in the third station with the number was 1,38. Physical and chemical parameter of water such as light intensity, salinity, dissolved oxygen, biochemical oxygen demand and oxygen saturation were strongly correlated with the diversity of plankton.