Keanekaragaman Plankton di Perairan Pulau Kampai Kecamatan Pangkalan Susu Kabupaten Langkat Sumatera Utara

Abstract

”Plankton Diversity of Sea Kampai Island, Subdistrict Pangkalan Susu, Regency Langkat, North Sumatera”, has been observed. This research was conducted by using Purpossive Random Sampling method to determine 3 stations of research based on activity difference of community around Sea Kampai Island. 9 replications were conducted to each point of sampling. The objectives of research would be to know the diversity of plankton and correlation between psychochemical factors of waters to diversity of plankton. The result of identification produced 9 classes of plankton, 29 families and 45 genus. Rhizosolenia was genus that have the highest K K (4843.54 ind/l), KR (44.67%), and FK (100%) in station I. Eucampia, Coscinodiscus, Thalassiothrix, Melosira, Pyrocystis, Diaptomus, Microstella, Oithona, and Arcella are genus that have the lowest K (13.61 ind/l), KR (0.29%), and FK (11.11%) in station II. The highest diversity index (H’) of plankton was found in station II that is 2.020, while the lowest one was found in stasion III that is 1.737. The highest index of uniformity (E) was found in station II that is 0.606, while the lowest one was found in station III that is 0.487. The result of correlation analysis indicated that temperature, salinity, light penetration, pH, BOD5, oxygen saturation, ammoniak and phosphate have a very strong correlation to diversity index (H’) of plankton.