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"The concept of periphyton growth is globally regarded as a functional unit, without considering the dynamics of various components as have been reported by earlier scholars, and is used as references to the algal periphyton growth modelling conducted in this study. Experimental data on the growth of periphyton biomass versus time was used to test two basic hypotheses to account for feedback effects on periphyton growth."

"Mikrobiota akuatik yang hidup menempel di berbagai substrat dan sangat sensitif terhadap pencemaran yang terjadi di perairan dapat menggambarkan kondisi perairan, yaitu perifiton. Penelitian bertujuan untuk menganalisis struktur komunitas perifiton dan parameter fisika-kimia air yang memengaruhi komponen perifiton. Penelitian berlokasi di Situ Rawa Besar, Depok, Jawa Barat yang dilakukan pada bulan Februari—Mei 2023. Parameter fisika-kimia yang diukur terdiri dari suhu, intensitas cahaya, kecerahan, derajat keasaman (pH), oksigen terlarut (DO), nitrat, dan fosfat. Sampel perifiton diambil dengan menyikat cangkang Pomacea canaliculata. Pencacahan perifiton menggunakan Sedgewick Rafter Counting Chamber di bawah mikroskop dengan pembesaran 100x dan diidentifikasi sampai tingkat marga. Data perifiton dihitung struktur komunitas dan dianalisis ada atau tidak ada perbedaan indeks keanekaragaman antarstasiun dengan uji T Independen menggunakan Microsoft Excel 365. Hasil penelitian ditemukan 26 marga perifiton dengan kepadatan perifiton tertinggi berasal dari kelas Cyanophyceae sebesar 103.752,5 plankter/cm2 dan terendah dari kelas Monogononta sebesar 32,50 plankter/cm2. Indeks keanekaragaman perifiton tergolong rendah (H’<1) dan menggambarkan kondisi perairan Situ Rawa Besar telah tercemar. Indeks kemerataan dan indeks dominansi perifiton menunjukkan penyebaran individu antar jenis tidak merata dan terdapat sekelompok jenis tertentu yang mendominasi di Situ Rawa Besar. Marga perifiton yang mendominansi Situ Rawa Besar adalah Planktothrix dan Arthrospira. Hasil analisis uji T Independen tidak terdapat perbedaan yang signifikan (thitung < ttabel dan p >0,05) terhadap nilai indeks keanekaragaman perifiton antarstasiun di Situ Rawa Besar, Depok, Jawa Barat.

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Aquatic microbiota that live attached to various substrates and are susceptible to pollution in the water can describe the condition of the water, namely periphyton. The study aimed to analyze the structure of the periphyton community and the physico-chemical parameters of water that affect the periphyton component. The research was done in Situ Rawa Besar, Depok, West Java, from February to May 2023. The physico-chemical parameters measured consisted of temperature, light intensity, brightness, acidity (pH), dissolved oxygen (DO), nitrate, and phosphate. Periphyton samples were taken by brushing the shell of Pomacea canaliculata. The counting of periphyton used Sedgewick Rafter Counting Chamber under a microscope with 100x magnification and identified to the genera level. Periphyton data calculated community structure and analyzed whether or not there is a difference in diversity index between stations with Independent T test using Microsoft Excel 365. The results of the study found 26 genera of periphyton with the highest periphyton density coming from the Cyanophyceae class of 103,752.5 plankter/cm2 and the lowest from the Monogononta class of 32.50 plankter/cm2. The periphyton diversity index is low (H'<1) and illustrates that the waters of Situ Rawa Besar were polluted. The evenness index and dominance index of periphyton show that the distribution of individuals between species is uneven and there is a certain group of species that dominate in Situ Rawa Besar. Periphyton genera that dominate Situ Rawa Besar are Planktothrix and Arthospira. The results of the Independent T test analysis showed no significant difference (tcount < ttable and p>0.05) in the value of the periphyton diversity index of inter-station in Situ Rawa Besar, Depok, West Java."

"Penelitian ini bertujuan untuk mengkaji jenis dan kelimpahan perifiton pada substrat plastik di Situ Agathis dan Situ Mahoni, menganalisis perbandingan kelimpahan perifiton pada substrat plastik di Situ Agathis dan Mahoni, dan menganalisis kualitas perairan melalui keanekaragaman perifiton pada substrat plastik padat di Situ Agathis dan Situ Mahoni. Penelitian ini menggunakan beberapa parameter diantaranya pH, suhu, oksigen terlarut (dissolved oxygen), kekeruhan (turbidity), kecerahan, arus, dan nitrat (NO3-). Penelitian dilakukan pada bulan September 2022 – Maret 2023 pada 3 stasiun pengambilan sampel di Situ Agathis dan Situ Mahoni. Sampel yang diperoleh dianalisis menggunakan indeks keanekaragaman Shannon-Wiener, Indeks kemerataan, dan indeks Dominansi Simpson. Berdasarkan hasil pengukuran parameter fisika kimia di Situ Agathis dan Situ Mahoni didapatkan kisaran pH, suhu, oksigen terlarut, kekeruhan, kecerahan, arus, nitrat (NO3-) secara berturut-turut yaitu 7,05-7,49; 22,9-30,7 ⁰C; 4,7-10,5 mg/l; 3,06-16,2 NTU; 31,8-44 cm; 0,003-0,015 m/s; 2,3-16,8 mg/l. Berdasarkan hasil identifikasi didapatkan 11 kelas perifiton di Situ Agathis dan Situ Mahoni yaitu Bacillariophyceae (13 genus), Chlorophyceae (11 genus), Conjugatophyceae (4 genus), Cyanophyceae (6 genus), Euglenophyceae (3 genus), Klebsormidiophyceae (1 genus), Monogononta (1 genus), Oligohymenophorea (1 genus), Trebouxiophyceae (1 genus), Tubulinea (1 genus), dan Xanthophyceae (1 genus) dengan total 44 genus. Situ Agathis memiliki total kelimpahan perifiton yang lebih tinggi dibandingkan Situ Mahoni dengan niilai berturut-turut 6.219,8 sel/cm2 dan 2.025 sel/cm2. Kelas Bacillariophyceae menjadi kelas dengan nilai kelimpahan perifiton tertinggi di kedua situ. Nilai keaneragaman perifiton di kedua situ menunjukkan bahwa kualitas air Situ Agathis dan Mahoni termasuk dalam kualitas air tercemar sedang.

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This study aims to examine the types and abundance of periphyton on plastic substrates in Situ Agathis and Situ Mahoni, analyze the comparison of periphyton abundance on plastic substrates in Agathis and Mahoni Situ, and analyze water quality through periphyton diversity on solid plastic substrates in Agathis and Mahoni Situ. This study used several parameters including pH, temperature, dissolved oxygen, turbidity, brightness, current flow, and nitrate (NO3-). The research was conducted in September 2022 – March 2023 at 3 sampling stations in Situ Agathis and Situ Mahoni. The samples obtained were analyzed using the Shannon-Wiener diversity index, evenness index, and Simpson dominance index.

Based on the results of measurements of physico-chemical parameters in the Agathis and Mahoni Situ, the range of pH, temperature, dissolved oxygen, turbidity, brightness, nitrate (NO3-) was obtained, respectively, namely 7.05-7.49; 22.9-30.7 ⁰C; 4.7-10.5 mg/l; 3.06-16.2 NTUs; 31.8-44cm; 0.003-0.015 m/s; 2.3-16.8 mg/l. Based on the identification results, 11 classes of periphyton were found in Situ Agathis and Situ Mahoni, namely Bacillariophyceae (13 genera), Chlorophyceae (11 genera), Conjugatophyceae (4 genera), Cyanophyceae (6 genera), Euglenophyceae (3 genera), Klebsormidiophyceae (1 genus), Monogononta (1 genus), Oligohymenophorea (1 genus), Trebouxiophyceae (1 genus), Tubulinea (1 genus), and Xanthophyceae (1 genus) with a total of 44 genera. Agathis Lake has a higher total periphyton abundance than Mahoni Lake with values of 6,219.8 cells/cm2 and 2,025 cells/cm2, respectively. The Bacillariophyceae class was the class with the highest periphyton abundance in both sites. The value of periphyton diversity in both lakes shows that the water quality of Agathis and Mahoni Lakes is classified as moderately polluted water quality."