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KEANEKARAGAMAN PLANKTON DI PANTAI SUJONO DESA LALANG, KECAMATAN MEDANG DERAS, KABUPATEN BATUBARA,
SUMATERA UTARA
ABSTRAK
Keanekaragaman plankton dapat digunakan sebagai data dasar dalam menilai kualitas suatu perairan. Penelitian ini bertujuan untuk mengetahui keanekaragaman plankton di Pantai Sujono, Desa lalang, Kecamatan Medang Deras, Kabupaten Batubara, Sumatera Utara. Metode penentuan titik sampel dengan purposive random sampling. Pengambilan sampel dengan menyaring air sebanyak 25 liter ke dalam plankton net kemudian dipindahkan ke dalam botol sampel. Spesimen kemudian diidentifikasi di Laboratorium Ilmu Dasar, Universitas Sumatera Utara. Plankton yang ditemukan termasuk kedalam 11 kelas, 19 ordo, 20 famili dan 26 spesies. Keanekaragaman plankton berkisar antara 1,78 - 2,33 tergolong relatif sedang. Penetrasi cahaya, salinitas, DO, pH, intensitas cahaya, temperatur air dan BOD5 menunjukkan hubungan korelasi paling kuat terhadap keanekaragaman plankton.
Kata kunci: Plankton, Keanekaragaman, Pantai Sujono, Kualitas air.
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DIVERSITY OF PLANKTON IN THE BEACH SUJONO, LALANG VILLAGE, MEDANG DERAS COUNTRY DISTRICT, OF NORTH
SUMATRA
ABSTRACT
Plankton diversity can be used as a baseline data to evaluate quality of water. This study was aimed to determine the plankton diversity in Sujono Beach, Lalang village, Medang Deras District of North Sumatra. The method of determining sampling points was purposive random sampling. Sampling was done by filtering as much as 25 litre of water into a plankton net then was transferred into the sample bottles. The specimen were identified in the Basic Science Laboratory, University of North Sumatra. Plankton that were found were belonged to the 11 classes, 19 orders, 20 families and 26 species. Plankton diversity ranged from 1.78 to 2.33 and classified as relatively moderate. The light penetration, salinity, dissolve oxygen, pH, light intensity, water temperature and BOD5 were strongly correlated to the diversity of plankton.
Keywords: Plankton, diversity, Sujono Beach, Water quality.
