Nurfadillah Nurfadillah, Desrita Desrita, Irma Dewiyanti, Sri Riska Rahayu, Seri Maulidawati, Siswani Sari, Surikawati Surikawati, Indri Karina
The role of plankton as natural food affects the potential of fish in the waters. The structure of the plankton community in the Aneuk Laot Lake can provide an overview of the stability of these waters. This study aims to determine the plankton biomass and the structure of the plankton community of Aneuk Laot Lake Sabang. This research was conducted in September 2019 in the waters of Aneuk Laot Lake. Determination of observation stations using the stratified random sampling method, identification of plankton using the census method and analysis of chlorophyll-a using the Trichomatic method. The results showed that the plankton composition consisted of 27 phytoplankton and 4 zooplankton genera which were divided into Bacillarophyceae (36%), Chlorophyceae (19%), Cyanophyceae (16%), Zygnematophyceae (10%), Dinophyceae (3%), Euglenophyceae (3%) and Crustacean class (13%). The abundance of plankton was 21,333 ind/l, the most abundant type is Navicula sp. Diversity index value (2.97) is category high, eveness index (0.87) and low dominance index (0.07). Chlorophyll-a values ranged from 2.84 to 4.84 mg/l including the medium nutrient category. Aneuk Laot Lake has a high level of community stability with trophic status of mesotrophic-eutrophic. © The Authors, published by EDP Sciences.
Department of Aquaculture, Faculty of Marine and Fisheries Universitas Syiah Kuala, Banda Aceh, Indonesia; Department of Marine Science, Faculty of Marine and Fisheries Universitas Syiah Kuala, Banda Aceh, Indonesia; Laboratory of Marine Biology, Faculty of Marine and Fisheries, Universitas Syiah Kuala, Banda Aceh, Indonesia; Marine and Fishery Research Center, Universitas Syiah Kuala, Banda Aceh, Indonesia; Aquatic Resources Management Study Program, Agriculture Faculty, Universitas Sumatera Utara, Medan, Indonesia; Local environmental agency, Sabang, Indonesia
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