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STATUS TROFIK PERAIRAN BERDASARKAN STRUKTUR KOMUNITAS PERIFITON, KLOROFIL-a, NITRAT DAN FOSFAT DI SUNGAI KALIGARANG, SEMARANG (22m548)

DWI PUTRA, MUHAMAD REZA (2022) STATUS TROFIK PERAIRAN BERDASARKAN STRUKTUR KOMUNITAS PERIFITON, KLOROFIL-a, NITRAT DAN FOSFAT DI SUNGAI KALIGARANG, SEMARANG (22m548). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
Muhamad Reza Dwi Putra. 26010116140067. Status Trofik Perairan Berdasarkan
Struktur Komunitas Perifiton, Klorofil-a, Nitrat dan Fosfat di Sungai Kaligarang,
Semarang (Suryanti dan Sigit Febrianto)
Sungai Kaligarang merupakan sungai yang melintasi Kota Semarang dan
memegang peranan penting bagi masyarakat. Aktivitas manusia dapat
mengakibatkan permasalahan, yaitu: eutrofikasi dan sedimentasi. Hal ini
berpengaruh terhadap kualitas perairan dan komunitas biota. Salah satunya
perifiton. Keberadaan perifiton dapat menggambarkan informasi dalam pendugaan
status trofik perairan berdasarkan komponen biologis yang berkaitan dengan
kondisi parameter fisika dan kimia. Tujuan penelitian ini untuk mengetahui status
trofik perairan dan mengkaji hubungan antara kepadatan perifiton dengan
kandungan klorofil-a, nitrat dan fosfat di Sungai Kaligarang. Penelitian ini
dilakukan pada bulan Maret - April 2021. Penelitian ini menggunakan metode
purposive sampling yang dilakukan di 3 stasiun. Analisis untuk mengetahui status
trofik perairan menggunakan Trophic State Index (TSI) Carlson, sedangkan untuk
analisis data menggunakan regresi linier berganda. Hasil yang diperoleh yaitu 9
genera perifiton dari kelas Bacillariophyceae 7 genera, kelas Chlorophyceae 1
genera, dan kelas Cyanophyceae 1 genera. Rata-rata kepadatan perifiton adalah
141.447 individu/cm2
. Kandungan klorofil-a sebesar 1,952-2,196 mg/L,
Kandungan nitrat sebesar 0,757-1,917 mg/L dan fosfat sebesar 0,026-0,110 mg/L.
Analisis regresi linier berganda didapatkan nilai korelasi 0,667 menunjukkan
terdapat hubungan sedang antara kepadatan perifiton dengan klorofil-a, nitrat dan
fosfat. Tingkat kesuburan perairan berdasarkan TSI adalah eutrofik ringan. Tingkat
kesuburan perairan berdasarkan kepadatan perifiton adalah eutrofik, lalu
berdasarkan klorofil-a adalah oligotrofik, meso-oligotrofik sedangkan berdasarkan
nitrat dan fosfat adalah oligotrofik-mesotrofik dan sedang-tinggi.
Kata kunci : Fosfat, Klorofil-a, Kesuburan Perairan, Nitrat, Perifiton, Sungai
Kaligarang.

ABSTRACT
Muhamad Reza Dwi Putra. 26010116140067. Trophic Status of Waters Based on
Periphyton Community Structure, Chlorophyll-a, Nitrate and Phosphate in
Kaligarang River, Semarang (Suryanti dan Sigit Febrianto)
Semarang's Kaligarang River is a river that runs through the city and is significant
to the locals. Eutrophication and sedimentation are two issues that can be brought
on by human activity. The biota community and the water quality are impacted by
this. The periphyton is one of them. Periphyton can provide data that can be used
to estimate the trophic status of waters using biological components connected to
the state of physical and chemical parameters. This study's objectives included
determining the trophic state of the waters and examining the correlation between
periphyton density and levels of nitrate, phosphate, and chlorophyll-a in the
Kaligarang River. This study was carried out in March and April of 2021.
Purposive sampling was used in this investigation, which was conducted at 3
locations. Multiple linear regression is used for data analysis while the Trophic
State Index (TSI) Carlson is used to determine the trophic status of the waterways.
Nine periphyton genera were found, with seven of them belonging to the
Bacillariophyceae class, one to the Chlorophyceae class, and one to the
Cyanophyceae class. Periphyton has an average density of 141,447 persons per
cm2
. Chlorophyll-a concentrations are 1.952-2.196 mg/L, nitrate concentrations
are 0.757-1.917 mg/L, and phosphate concentrations are 0.026-0.110 mg/L.
According to multiple linear regression analysis, there was a moderate association
between periphyton density and chlorophyll-a, nitrate, and phosphate with a
correlation value of 0.667. Based on the TSI, the waterfertility rate isjustsomewhat
eutrophic. Eutrophic is the water fertility rate based on periphyton density, followed
by oligotrophic, meso-oligotrophic, and high levels of oligotrophic-mesotrophic
conditions based on chlorophyll-a, nitrate, and phosphate.
Keywords: Phosphate Chlorophyll-a Water Fertility, Nitrate, Periphyton,
Kaligarang River.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Fosfat, Klorofil-a, Kesuburan Perairan, Nitrat, Perifiton, Sungai Kaligarang, Phosphate Chlorophyll-a Water Fertility, Nitrate, Periphyton, Kaligarang River
Subjects: Fisheries And Marine Sciences
Divisions: Faculty of Fisheries and Marine Sciences > Department of Aquatic Resources
Depositing User: pancasila wati
Date Deposited: 09 Oct 2023 06:41
Last Modified: 09 Oct 2023 06:41
URI: https://eprints2.undip.ac.id/id/eprint/17025

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