ANALISIS KERAGAMAN FITOPLANKTON DI SUNGAI BARUMUN KECAMATAN PANAI TENGAH KABUPATEN LABUHANBATU

SARI MAWADDAH HARAHAP, NPM 1904300084 (2023) ANALISIS KERAGAMAN FITOPLANKTON DI SUNGAI BARUMUN KECAMATAN PANAI TENGAH KABUPATEN LABUHANBATU. Tugas_Akhir (Artikel) Bioscientist : Jurnal Ilmiah Biologi, 11 (1). pp. 64-74. ISSN 2338-5006 (p-ISSN)/ 2654-4571 (e-ISSN)

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Abstract

Penelitian tentang analisis keragaman fitoplankton telah dilakukan di Perairan Sungai Barumun, Kecamatan Panai Tengah, Kabupaten Labuhanbatu. Sungai Barumun banyak digunakan oleh masyarakat sekitar untuk berbagai aktivitas, misalnya: pembuangan limbah industri, limbah rumah tangga, tempat pelelangan ikan, pelabuhan, dan penangkapan ikan. Aktivitas tersebut mengakibatkan Sungai Barumun tercemar dengan warna air yang semakin keruh. Tujuan penelitian ini adalah untuk mengetahui keanekaragaman fitoplankton di Sungai Barumun. Jenis penelitian ini merupakan penelitian deskriptif dengan pendekatan kuantitatif. Pengambilan sampel menggunakan Plankton Net mesh size 30 μm dari 3 stasiun dengan 10 kali ulangan, pengamatan menggunakan mikroskop, diidentifikasi menggunakan buku “Marine and Fresh Plankton“, dihitung dan dianalisis indeks keanekaragaman plankton di Laboratorium Zoologi, Program Studi Pendidikan Biologi, FKIP, Universitas Labuhanbatu. Plankton kelimpahan dihitung dengan menggunakan metode perhitungan mikro transek Lackey Drop dan keragaman plankton dihitung menggunakan rumus Shannon-Wiener. Hasil penelitian menunjukkan bahwa fitoplankton yang ditemukan didominansi oleh Diatom dan Dinoflagellata, dengan kelimpahan rata-rata paling tinggi ialah dari genus Cerratulina (1015 ind/L), dan nilai kelimpahan yang paling rendah ialah genus Protoperidiun (5 ind/L). Indeks keanekaragaman termasuk kategori keanekaragaman sedang (1,48- 1,90), dan indeks dominansinya berada di kisaran antara 0,24-0,28 dengan kategori rendah. Kata Kunci : Fitoplankton, Indeks Keanekaragaman, Indeks Dominansi ==================================================================== Research on the analysis of the diversity of phytoplankton has been carried out in the Barumun River, Panai Tengah District, Labuhanbatu Regency. The Barumun River is widely used by the surrounding community for various activities, for example: disposal of industrial waste, household waste, fish auctions, ports, and fishing. This activity resulted in the Barumun River being polluted with increasingly turbid water color. The purpose of this study was to determine the diversity of phytoplankton in the Barumun River. This type of research is a descriptive research with a quantitative approach. Sampling used Plankton Net mesh size 30 μm from 3 stations with 10 repetition, observed using a microscope, identified using the book "Marine and Fresh Plankton", counted, and analyzed the diversity index of plankton in the Zoology Laboratory, Biology Education Department, FKIP, University Labuhanbatu. Plankton abundance was calculated using the Lackey Drop micro-count method and Plankton diversity was calculated using the Shannon-Wiener formula. The results showed that the phytoplankton found were dominated by Diatoms and Dinoflagellates, with the highest average abundance being from the genus Cerratulina (1015 ind/L), and the lowest abundance value was from the Protoperidiun genus (5 ind/L). The diversity index is included in the moderate diversity category (1.48-1.90), and the dominance index is in the range of 0.24-0.28 with a low category. Keywords : Phytoplankton, Diversity Index, Dominance Index

Item Type: Article
Uncontrolled Keywords: Fitoplankton, Indeks Keanekaragaman, Indeks Dominansi ================================= Phytoplankton, Diversity Index, Dominance Index
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history > QH301 Biology
Divisions: Fakultas keguruan dan Ilmu Pendidikan > Pendidikan Biologi
Depositing User: Unnamed user with email repository@ulb.ac.id
Date Deposited: 14 Apr 2025 02:58
Last Modified: 14 Apr 2025 02:58
URI: http://repository.ulb.ac.id/id/eprint/1240

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