KELIMPAHAN DAN KEANEKARAGAMAN MAKROZOOBENTOS DI SUNGAI AIR TERJUN TUNAN, TALAWAAN, MINAHASA UTARA, SULAWESI UTARAABSTRAKMakrozoobentos merupakan organisme akuatik yang hidup di dasar perairan dengan pergerakan relatif lambat yang sangat dipengaruhi oleh substrat dasar serta kualitas perairan. Penelitian ini bertujuan untuk menganalisis keanekaragaman makrozoobentos yang terdapat di sungai air terjun Tunan, Desa Talawaan, Minahasa Utara, Sulawesi Utara. Pengambilan sampel dilakukan pada tiga stasiun. Stasiun 1 (Air Terjun Tunan), Stasiun 2 (Pintu masuk wisata), dan Stasiun 3 (Perkebunan). Pengambilan sampel makrozoobentos menggunakan metode purposive random sampling. Pengambilan sampel makrozoobentos di dasar perairan dengan menggunakan jaring surber yang berukuran ukuran 25 cm x 40 cm. Hasil penelitian menunjukan makrozoobentos yang ditemukan di sungai air terjun Tunan terdiri dari 3 filum, 3 kelas, 10 bangsa, 20 suku, dan 23 marga serta 379 individu. Marga makrozoobentos yang sering di jumpai yaitu Hydropsyche dan Suku makrozoobentos yang paling sering dijumpai yaitu suku Heptageniidae. Indeks keanekaragaman makrozoobentos tertinggi pada stasiun 1 (2,69), kemudian diikuti oleh stasiun 2 (2,31) dan terendah pada stasiun 3 (1,94).Kata kunci: Air terjun Tunan, Indeks Keanekaragaman, Makrozoobentos ABUNDANCE AND DIVERSITY OF MACROZOOBENTOS IN TUNAN WATERFALL RIVER, TALAWAAN, NORTH MINAHASA, NORTH SULAWESI ABSTRACTMacrozoobenthos are aquatic organisms that live at the bottom of the waters with relatively slow movements that are strongly influenced by the basic substrate and the quality of the waters. This study aims to analyze the diversity of macrozoobenthos in the Tunan waterfall river, Talawaan Village, North Minahasa, North Sulawesi. Sampling was carried out at three stations. Station 1 (Tunan Waterfall), Station 2 (tourist entrance), and Station 3 (Plantation). Macrozoobenthos samples were taken using purposive random sampling method. Taking macrozoobenthos samples at the bottom of the water using a surber net measuring 25 cm x 40 cm. The results showed that macrozoobenthos found in the Tunan waterfall river consist of 3 phylum, 3 classes, 10 ordo, 20 familia, and 23 genus and 379 individuals. Macrozoobenthic genus that are often encountered are Hydropsyche and the most common macrozoobenthic classis, the Heptageniidae classis. The highest macrozoobenthos diversity index at station 1 (2.69), followed by station 2 (2.31) and the lowest at station 3 (1.94). Keywords: Tunan Waterfall, Diversity Index, Macrozoobentos
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