Struktur Komunitas Plankton di Danau Pondok Lapan Desa Naman Jahe Kecamatan Salapian Kabupaten Langkat

Abstract

Plankton in aquatic ecosystems play a major role in the food chain. This is because the role of plankton as producers (phytoplankton) and consumer level I (zooplankton) in the waters of other organisms that can be used include fish. This research focused on plankton community structure and measurement of physical and chemical factors. This research was conducted in January-March 2015. Metoode research is purposive random sampling to determine the station's intent and purpose. Intake of plankton carried out by using a modified water sampling Van Dorn water sampler and then filtered with a plankton net no. 25. Diversity of plankton in these waters including the medium category with a value H '2.121. Types of plankton are found in high abundance is Scenedesmus sp., Chodatella sp. and Ankistrodesmus sp. Of the types of zooplankton are Cyclops sp. Branchionus sp. and Nauplius sp. Based saprobiknya coefficient is known that these waters classified as moderately polluted 1,158 value and included into the β phase of meso / oligosaprobik.