Analisis Kulaitas Air dan Daya  Serap Karbon oleh Fitoplankton di Danau Maninjau  Sumbar.

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Analisis Kulaitas Air dan Daya Serap Karbon oleh Fitoplankton di Danau Maninjau Sumbar.

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Oleh : Muhammad Arif Salsabil

Info Katalog

Penerbit : FALTL - Usakti

Kota Terbit : Jakarta

Tahun Terbit : 2018

Pembimbing 1 : Melati Ferianita Fachrul

Pembimbing 2 : Astri Rinanti Nugroho

Subyek : Water quality

Kata Kunci : bioinbioindicators, phytoplankton, water quality, chlorophyll-a, carbon absorption rate, maninjau la

Status Posting : Published

Status : Lengkap

File Repositori

No.	Nama File	Hal.
1.	2018_TA_TL_082001300027_halaman-judul.pdf
2.	2018_TA_TL_082001300027_Bab-1.pdf	3
3.	2018_TA_TL_082001300027_Bab-2.pdf
4.	2018_TA_TL_082001300027_Bab-3.pdf
5.	2018_TA_TL_082001300027_Bab-4.pdf
6.	2018_TA_TL_082001300027_Bab-5.pdf
7.	2018_TA_TL_082001300027_Daftar-pustaka.pdf
8.	2018_TA_TL_082001300027_Lampiran.pdf

Abstrak
Abstract

D anau Maninjau terletak di Kecamatan Tanjung Raya, Kabupaten Agam, Sumatera Barat, dengan luas 99,5 Km2 dan kedalaman rata-rata 105 meter. Untuk mengetahui kondisi perairan Danau Maninjau dilakukan penelitian kualitas air dengan menggunakan fitoplankton sebagai bioindikator pencemaran. Penelitian ini bertujuan untuk menganalisis kualitas air, menganalisis struktur komunitas fitoplankton, menganalisis hubungan kelimpahan fitoplankton dengan sebaran nitrat dan fosfat, serta menganalisis hubungan kandungan klorofil-a dan kemampuan laju serapan karbon. Penelitian dilakukan pada bulan Mei-Juli 2017 di 11 titik pengambilan sampel, yang ditentukan berdasarkan inlet, zona tengah dan outlet danau. Pengukuran kualitas air untuk parameter fisika dan kimia di perairan Danau Maninjau mengacu pada Peraturan Pemerintah No. 82 Tahun 2001.Parameter yang melebihi baku mutu adalah DO(3,2 mg/L), dan Fosfat (0,120,54 mg/L). Kelimpahan fitoplankton yang ditemukan selama 3 kali pengambilan sampel berkisar 78â€“273 sel/liter yang terdiri dari 3 filum yaitu Cyanophyta, Chrysophyta, dan Chlorophyta. Indeks Keanekaragaman (Hâ€™) rata-rata 3,52 ini tergolong sedang atau mengindikasikan perairan tercemar rendah, Indeks Keseragaman (E) rata-rata pada perairan didapat 0,92 yang mengindikasikan bahwa keseragaman antara spesies relatif merata, Indeks Dominansi (C) berkisar antara 0,1-0,13 yang mengindikasikan tidak ada jenis fitoplankton yang mendominasi, sedangkan jika dilihat dari Indeks Saprobitas (X) rata-rata perairan didapat nilai 1,34 dimana perairan diklasifikasikan tingkat pencemaran rendah pada pencemaran bahan organik dan anorganik. Fitoplankton yang sering ditemukan di perairan Danau Maninjauadalah jenis Nitzchia sp yang masuk kedalam filum Chrysophyta dengan kelimpahan mencapai 87 sel/liter. Fitoplankton jenis ini memiliki sifat resisten terhadap bahan pencemar. Sumber pencemaran di Danau Maninjau disebabkan oleh buangan organik dan anorganik dari aktivitas di sekitar Danau Maninjau terutama aktivitas rumah tangga dan keramba. Nilai klorofil-a rata-rata Danau Maninjau sebesar 0,09 mg/l hal ini mengindikasikan perairan tergolong oligotrofik. Besarnya daya serap karbon rata-rata oleh fitoplankton mencapai 68410,13ton/hari. Hal ini membuktikan bahwa keberadaan dan kondisi ekosistem perairan Danau Maninjau sangat penting dalam pengendalian gas CO2

M aninjau Lake located at Tanjung Raya Sub District, Agam District, West Sumatera with an area of 99,5 Km2 and with average depth of 105 meters. To determine the condition of water quality of Maninjau Lake can be done by using phytoplankton as bioindicator of pollution. This study aimed to analyze the quality of water, analyzing the phytoplankton community structure, analyze the relationship between phytoplankton abundance and dispersion of nitrates and phosphates, as well as analyze the relationship between chlorophyll-a and the ability of the carbon rate. This research was conducted on May until July 2017 with 11 points of sampling location, which is determined based on the inlet, the middle zone and the outlet of the lake. Water quality measurements for physical and chemical parameters in Maninjau Lake waters based on Government Regulation No. 82 of 2001, it was found that some exceeded the standard quality parameters including the DO (3,2 mg/l), and Phosphate (0,12-0,54 mg/l). The Abundance of phytoplankton were found during sampling 3 times were ranged 78-273 cells/liter which consists of 3 phylum of Cyanophyta, Chrysophyta, and Chlorophyta. With a range of Diversity Index (H') reached an average of 3.52 which is diversity in these waters classified as moderate or indicate half polluted waters, to the value of Uniformity Index (E) on average in waters gained 0.92 indicating that the diversity of species is medium, Dominance Index (C) were ranged 0,1-0,13 which indicates there was not any phytoplankton that dominates others, whereas, if considered from the saprobity index(X) the average value obtained is 1,34 where waters were classified with low level of pollution in the pollution of organic and inorganic materials. Phytoplankton which is often found in Maninjau Lake is from Chrysophyta phylum with an abundance reached 87 cells / liter. This is because in this phylum There are phytoplankton types of Nitzchia sp. Phytoplankton is resistant to contaminants. Sources of pollution in Maninjau lake caused by discharges of organic and inorganic activities around Maninjau Lake mainly household activities and fish cultivation (Keramba). The value of chlorophyll-a in Maninjau Lake average of 0.09 mg/l indicating oligotrophic waters. The amount of carbon absorption capacity on average by phytoplankton reached 68410,13 tons/dear. It is proven that the presence and condition of aquatic ecosystems of Maninjau Lake is very important in the control of CO2