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"Telah dilakukan penilaian kualitas air menggunakan ikan sebagai indikator di Situ Salam Kampus Universitas Indonesia Depok, Jawa Barat. Pengambilan sampel dilakukan pada titik inlet, midlet dan outlet dengan dua stasiun pada masing-masing titik. Dari hasil pengamatan didapatkan 5 suku ikan dengan 10 jenis yaitu Channa striata, Amphilophus labiatus, Oreochromis mossambicus, Oreochromis niloticus, Tilapia buttikoferi, Hypostomus plecostomus, Betta splendens, Trichopodus trichopterus, Trichopodus pectoralis, Poecilia reticulata. Berdasarkan hasil pengamatan didapatkan indeks keanekaragaman (H’) pada titik inlet, midlet dan outlet berturut-turut 1,66; 1,88 dan 1,84 yang dikategorikan sedang; hasil indeks dominansi (C) pada titik inlet, midlet dan outlet berturut-turut 0,21; 0,2 dan 0,18 yang juga dikategorikan sedang. Berdasarkan skoring total IBI yang berkisar antara 31-33, mengindikasikan bahwa kesehatan Situ Salam Universitas Indonesia termasuk dalam kategori sedang. Hal ini menggambarkan bahwa Situ Salam Universitas Indonesia telah mengalami perubahan yang disebabkan oleh banyak faktor, terutama aktivitas manusia.

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An assessment of water quality has been carried out using fish as an indicator at Situ Salam University of Indonesia, Depok, West Java. Sampling was conducted at three areas which are inlet, midlet and outlet with two stations at each point. From the observations, it has been obtained 5 families with 10 species, namely Channa striata, Amphilophus labiatus, Oreochromis mossambicus, Oreochromis niloticus, Tilapia buttikoferi, Hypostomus plecostomus, Betta splendens, Trichopodus trichopterus, Trichopodus pectoralis, dan Poecilia reticulata. Based on the observations, the diversity index (H”) at inlet, midlet and outlet was 1.66; 1.88 and 1.84, which were categorized as moderate; The results of the dominance index (C) at inlet, midlet and outlet was 0.21; 0.2 and 0.18 which are also categorized as moderate. Based on the total IBI score, which ranges from 31-33, it shows that the health of Situ Salam University of Indonesia is in the moderate category. This illustrates that the University of Indonesia's Situ Salam has undergone changes caused by many factors, especially human activities."

"Telah dilakukan penelitian penilaian terhadap kualitas perairan menggunakan makrozoobentos pada eceng gondok (Eichhornia crassipes) dengan Family Biotic Index (FBI) dan mengetahui struktur komunitas makrozoobentos di Situ Salam Universitas Indonesia. Situ Salam berada di bagian utara kampus UI. Berdasarkan parameter fisika-kimia yang dilakukan yaitu hasil suhu yaitu 28,66—30⁰C, hasil turbiditas yaitu 6,9—8 NTU, hasil kecepatan arus yaitu 0,012—0,071 m/s,hasil dissolved oxygen (DO) yaitu 6,58—9,87 mg/L, hasil derajat keasaman (pH) yaitu 6,79—7,11, hasil kecerahan air yaitu 82—93,66 cm, hasil kedalaman yaitu 179—318,33 cm, hasil nitrat yaitu 0,58—2 mg/L, dan hasil fosfat yaitu 0,47—1,48 mg/L. Berdasarkan hasil FBI, kualitas perairan Situ Salam tergolong kategori buruk dengan nilai FBI berkisar 6,42—6,64. Berdasarkan hasil struktur komunitas makrozoobentos, indeks keanekaragaman tergolong tinggi dengan nilai < 2,50, indeks dominansi tergolong rendah dengan nilai < 0,26 yang menandakan jenis makrozoobentos tidak ada yang mendominansi, indeks Evenness tergolong merata dengan nilai < 0,90 dan indeks kelimpahan berkisar antara 0,2—34,4 ind/tanaman. Berdasarkan hasil dilakukan di Situ Salam parameter fisika-kimia tergolong dalam perairan yang masih dapat ditoleransi oleh makrozoobentos.

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An assessment of water quality has been carried out using macrozoobenthos on water hyacinth (Eichhornia crassipes) with the Family Biotic Index (FBI) and to determine the structure of the macrozoobenthos community in Situ Salam, Depok, West Java. Situ Salam is a lake that has a parallel flow from south to north which has a series with Situ Puspa and Situ Ulin. Situ Salam is located in the northern part of the UI campus near the Makara Dormitory, University of Indonesia and comes from the water input of Situ Agathis. Measurements of physico-chemical environmental parameters were carried out namely, temperature with a yield of 28.66—30⁰C, turbidity with a yield of 6.9—8 NTU, current velocity with a yield of 0.012—0.071 m/s, dissolved oxygen (DO) with a yield of 6.58—9,87 mg/L, degree of acidity (pH) with a yield of 6.79—7.11, water brightness with a yield of 82—93.66 cm, depth with a yield of 179—318.33 cm, the nitrate with a yield of 0.58—2 mg/L, and phosphate with a yield of 0.47—1.48 mg/L. Based on the results of the FBI, the water quality of Situ Salam is classified as poor with an FBI value ranging from 6.42—6.64. The diversity index is low with a value of < 2.50, the dominance index is low with a value of < 0.26 which indicates that no macrozoobenthos species dominates, the Evenness index is evenly distributed with a value of < 0.90 and abundance index ranged from 0.2-34.4 ind/plant. Based on the results of measurements of physico-chemical parameters that have been carried out, Situ Salam is classified in waters that can still be tolerated by macrozoobenthos."

"Situ Agathis dan Situ Salam merupakan dua dari enam situ yang berada di dalam wilayah Kampus Universitas Indonesia. Penelitian yang telah dilakukan terdahulu menunjukan bahwa kualitas air di situ-situ UI sudah menurun disebabkan oleh masuknya pencemaran air dari aktivitas manusia sekitar. Limbah air berupa nitrat dan fosfat dari Situ Agathis dapat terbawa hingga Situ Salam, dan berdampak menurunnya kualitas air pada situ tersebut. Penurunan kualitas air akan berdampak pada keberadaan burung air dan sumber pakannya. Penelitian ini bertujuan menilai kualitas air Situ Agathis dan Situ Salam berdasarkan Index Waterbird Community Intergrity (IWCI) dan mengaitkan jenis burung air yang ada pada kedua situ dengan sumber pakannya dan parameter fisika dan kimia perairan. Penelitan dilakukan pada Bulan Agustus-September tahun 2020. Ada 3 spesies burung air yang ditemukan pada kedua situ, yaitu Amaurornis phoenicurus, Alcedo meninting, dan Todirhamphus chloris. Hasil penilaian Index Waterbird Community Integrity (IWCI) pada Situ Agathis adalah 11,14, sedangkan pada Situ Salam adalah 16,29. Nilai tersebut menunjukan bahwa kondisi perairan pada Situ Agathis dan Situ Salam sudah tidak baik untuk menopang kehidupan burung air. Rendahnya nilai IWCI pada kedua situ didukung oleh rendahnya penilaian kualitas air berdasarkan sumber pakan burung air dan kondisi fisika dan kimia perairan tersebut.

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Situ Agathis and Situ Salam are two of the six ponds within Kampus Universitas Indonesia. Studies have shown that the water quality within those ponds has slowly declined over the years due to the intake of water pollution from human activities nearby. Water wastes in the form of nitrate and phosphate can be brought all the way from Situ Agathis to Situ Salam, thus declining the water quality in that pond too. This decline will have an impact on waterbird diversity and its source of food. The purpose of this research is to assess the water quality of Situ Agathis and Situ Salam based on the Index of Waterbird Community Integrity (IWCI) and to link the existence of waterbird species in those two ponds to its source of food, and also to the physical and chemical parameters of the water itself. This research was done during the month of August to September 2020. Three species of waterbirds were found, which are: Amaurornis phoenicurus, Alcedo meninting, dan Todirhamphus chloris. The results of the Index of Waterbird Community Integrity (IWCI) assessment show that Situ Agathis has the score of 11,14, while Situ Salam has the score of 16,29. Those results show that the water condition in both ponds is not good enough to support the life of waterbirds. The low IWCI scores in those two ponds are supported by the similar low scores for water quality assessment based on waterbird’s source of food. It is also supported by the physical and chemical parameters of the water itself."

"Penelitian mengenai Struktur Komunitas Epifiton dan Fitoplankton pada Eceng Gondok (Eichhornia crassipes) sebagai Indikator Pencemaran Perairan di Situ Salam, Universitas Indonesia, Depok, Jawa Barat telah dilakukan pada bulan Agustus hingga November 2021. Penelitian ini bertujuan untuk mengetahui struktur komunitas epifiton dan fitoplankton yang dapat digunakan sebagai indikator pencemaran perairan di Situ Salam UI. Dua macam sampel yang diambil, yaitu mikroalga epifitik dan planktonik. Hasil penelitian menunjukkan bahwa komposisi jenis epifiton yang diambil dari batang eceng gondok ditemukan 11 kelas dari 30 marga dengan kelimpahan berkisar 181-6.716 plankter/ sedangkan komposisi fitoplankton yang hidup di perairan bagian bawah tanaman eceng gondok ditemukan 5 kelas dari 22 marga dengan kelimpahan berkisar 35.519-241.538 plankter/liter. Jenis epifiton dan fitoplankton pada eceng gondok di Situ Salam yang dapat menjadi indikator pencemaran perairan terdiri atas Synedra, Phacus, Gomphonema, Pinnularia, Pediastrum, Oscillatoria, Closterium, Merismopedia, Planktothrix, Tabellaria, Ankistrodesmus, Nitzschia, Spirogyra, Fragillaria, Melosira, Euglena, Scenedesmus, Chlorella, Navicula, Eudorina, Pandorina, Trachelomonas, Cymbella, dan Coelastrum. Mikroalga yang dapat hidup secara epifitik dan planktonik pada eceng gondok di Situ Salam terdiri atas Pediastrum, Planktothrix, Oscillatoria, Merismopedia, Euglena, dan Phacus sebagai indikator pencemaran perairan. Epifiton dan fitoplankton yang hidup pada eceng gondok di Situ Salam memiliki keanekaragaman sedang, tidak ada jenis yang mendominasi, Evenness cukup dan hampir merata, serta Situ Salam tercemar sedang. Parameter fisika-kimia perairan tidak memiliki korelasi yang kuat terhadap kelimpahan epifiton dan fitoplankton pada eceng gondok di Situ Salam.

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Research on the Structure of Epiphyton and Phytoplankton Communities on Water Hyacinth (Eichhornia crassipes) as Indicators of Water Pollution in Situ Salam, Universitas Indonesia, Depok, West Java has been carried out from August to November 2021. This study aims to determine the structure of epiphyton and phytoplankton communities that can be used as indicators of water pollution in Situ Salam UI. Two kinds of samples were taken namely epiphytic and planktonic microalgae. The results showed that the composition of the epiphyton species in water hyacinth were found in 11 classes from 30 genera with abundances ranged from 181-6.716 plankter/ , while the composition of phytoplankton lived in the lower waters of the water hyacinth plant were found in 5 classes from 22 generas with abundances ranged from 35.519-241.538 plankter/liter. Types of epiphyton and phytoplankton on water hyacinth in Situ Salam that were tolerant of polluted waters consisted of Synedra, Phacus, Gomphonema, Pinnularia, Pediastrum, Oscillatoria, Closterium, Merismopedia, Planktothrix, Tabellaria, Ankistrodesmus, Nitzschia, Spirogyra, Fragillaria, Melosira, Scenedesmus, Chlorella, Navicula, Eudorina, Pandorina, Trachelomonas, Cymbella, and Coelastrum. Microalgae that can lived epiphytically and planktonically on water hyacinth in Situ Salam consisted of Pediastrum, Planktothrix, Oscillatoria, Merismopedia, Euglena, and Phacus as indicators of water pollution. Epiphyton and phytoplankton that lived on water hyacinth in Situ Salam have moderate diversity, no species dominates, Evenness were sufficient and almost evenly distributed, and Situ Salam was moderately polluted. Water physico-chemical parameters did not have a strong correlation with the abundance of epiphyton and phytoplankton on water hyacinth in Situ Salam."

"ABSTRAKTelah dilakukan penelitian tentang penilaian Kualitas Air Situ Salam diKampus Universitas Indonesia, Depok. Penelitian ini bertujuan untuk mengetakualitas perairan di situ salam berdasarkan pada Nation Sanitation Foundation Water Quality Index (NSF-WQI). Penelitian ini menggunakan metode deskrip yaitu tidak dimaksudkan untuk menguji hipotesis tertentu, tetapi hanya menggambarkan obyek yang diteliti dengan data suatu variabel, gejala atau keadaan. Hasil yang diperoleh adalah kualitas air situ Salam berdasarkan Wate Quality Index (WQI) menunjukkan hasil normal (medium). Hasil normal mengindikasikan bahwa air situ Salam masih dalam kisaran tidak membahayak tingkat pencemarannya, sehingga air situ Salam masih dapat dipergunakan unt berbagai aktivitas. Hal ini berarti bahwa parameter standar penilaian kualitas masih di bawah standar baku mutu air.

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Abstract Research on water quality assessment of water quality in Situ SalamUniversitas Indonesia, Depok. This study aims to determine the quality of wat in situ Salam based on the Nation Sanitation Foundation Water Quality Index (NSF-WQI). This research uses descriptive method that is not intended to test specific hypothesis, but only describes the object under study with the data ofa variable, symptom or condition. The results obtained are based on water quality of situ Salam in Water Quality Index (WQI) were normal (medium). Normal was indicate that the water is still within the range, where situ Salam i not dangerous levels of pollution, thus there can still be used for various activities. This means that the parameters of water quality assessment standard are still below the quality standard"

"Telah dilakukan penelitian mengenai penilaian kualitas air secara biologis menggunakan bioindikator makrozoobentos di Situ Agathis dan Situ Salam Universitas Indonesia, Depok pada bulan Februari 2020 yang mewakili musim hujan. Situ Agathis dan Situ Salam merupakan dua situ yang secara berturut-turut merupakan awal dan akhir dari aliran air di situ KAMPUS UI, Depok. Penelitian bertujuan untuk membandingkan kualitas air dengan menggunakan makrozoobentos sebagai bioindikator dengan Family Biotic Index (FBI) dan mengkaji penggunaan indeks keanekaragaman Shannon Wiener dan indeks dominansi Simpson di Situ Agathis dan Situ Salam Universitas Indonesia, Depok. Pengukuran parameter lingkungan fisik-kimia juga telah dilakukan seperti suhu, turbiditas, arus, TSS, TDS, pH, DO, BOD, fosfat dan nitrat. Berdasarkan hasil yang diperoleh, kualitas air di Situ Agathis termasuk kategori sangat buruk dengan nilai FBI berkisar 7,69—9,47 dan Situ Salam tergolong perairan agak buruk dengan nilai FBI sekitar 6,00—6,41. Indeks keanekaragaman di kedua situ tergolong rendah dengan nilai <2,302 dan nilai indeks dominansi <0,5 yang artinya tidak ada jenis makrozoobentos yang mendominansi walaupun beberapa famili ditemukan dalam jumlah individu yang banyak. Berdasarkan analisis data yang telah dilakukan dengan uji statistik Mann Whitney, terdapat perbedaan kualitas air di Situ Agathis dan Situ Salam Universitas Indonesia, Depok. Kualitas air di Situ Salam cenderung lebih baik dibandingkan di Situ Agathis karena adanya sistem cascade pond. Berdasarkan hasil pengukuran parameter fisik-kimia yang telah dilakukan, Situ Agathis dan Situ Salam tergolong dalam perairan yang masih dapat ditoleransi oleh organisme makrozoobentos.

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Research on biological water quality assessment using macrozoobenthos in Situ Agathis and Situ Salam Universitas Indonesia, Depok was conducted on February 2020 which represents the rainy season. The study aimed to compare water quality using macrozoobenthos as bioindicator with the Family Biotic Index and to examine the Shannon Wiener diversity index and the Simpson dominance index in Situ Agathis and Situ Salam Universitas Indonesia, Depok. The measurement of physical and chemical environmental parameters such as temperature, turbidity, flow rate, TSS, TDS, pH, DO, BOD, phosphate and nitrate have also been carried out. Based on the results obtained, the water quality in Situ Agathis was classified as very poor with an average FBI score that ranged between 7.69—9.47 and Situ Salam was classified fairly poor with an average FBI score that ranged between 6.00—6.41. The diversity index in the two locations was classified as low diversity with the score <2.302 while the dominance index score is <0.5 which means there is no dominance even though some families are found in large number of individuals. Based on data analysis that has been carried out with the Mann Whitney statistical test, there are differences in water quality in Situ Agathis and Situ Salam Universitas Indonesia, Depok. The water quality of Situ Salam tends to be better than Situ Agathis due to a cascade pond system. Based on the results of the measurements of physical and chemical environmental parameters that have been carried out, Situ Agathis and Situ Salam are classified as waters that can be tolerated by macrozoobenthos organisms."

"Situ Agathis merupakan situ pertama yang menerima aliran air dari saluran DAS Ciliwung menuju wilayah kampus Universitas Indonesia. Keberadaan Situ Agathis dapat memengaruhi kualitas perairan keempat situ lainnya di Universitas Indonesia. Telah dilakukan penelitian mengenai penilaian kualitas air sebagai penyesuaian penggunaan indeks Singscore di Situ Agathis, Universitas Indonesia, Depok, Jawa Barat pada bulan maret 2022. Berdasarkan hasil perhitungan indeks Singscore, Situ Agathis tergolong kedalam perairan buruk dengan total nilai kriteria sebasar 34,35. Hasil penilaian indeks Singscore berhubungan dengan hasil perhitungan parameter fisika-kimia air yakni mengindikasikan perairan tercemar. Selain itu, berdasarkan jenis dan komposisinya, makrozoobenthos yang menempati perairan Situ Agathis memiliki kemampuan toleransi terhadap perairan tercemar. Korelasi antara indeks Singscore, parameter fisika-kimia air dan makrozoobenthos dapat dilihat melalui hasil analisis PCA. Hasil menunjukkan adanya korelasi negatif antara indeks Singscore dengan makrozoobenthos. Hasil nilai korelasi negatif disebabkan oleh beberapa famili yang memiliki nilai toleransi besar dapat hidup berdampingan dengan famili yang memiliki nilai toleransi kecil serta nilai indeks Singscore yang memiliki perbedaan jauh pada masing-masing stasiun yang dapat memengaruhi nilai korelasi. Selain itu, analisis PCA menunjukkan parameter fisika yang mempengaruhi keberadaan makrozoobenthos di Situ Agathis meliputi suhu, kekeruhan, dan oksigen terlarut (DO).

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Situ Agathis is the first pond to receive water from the Ciliwung watershed to the University of Indonesia campus area. The existence of Situ Agathis can affect the water quality of the other four lakes at the University of Indonesia. Research has been carried out on the assessment of water quality as an adjustment to the use of the Singscore index at Situ Agathis, University of Indonesia, Depok, West Java in March 2022. Based on the results of the Singscore index calculation, Situ Agathis is classified as bad waters with a total criterion value of 34.35. The results of the Singscore index assessment are related to the results of the calculation of the water physico-chemical parameters, which indicate polluted waters. In addition, based on the type and composition, the macrozoobenthos that inhabit the waters of Situ Agathis can tolerate polluted waters. The correlation between Singscore index, water physico-chemical parameters, and macrozoobenthos can be seen through the results of PCA analysis. The results showed a negative correlation between the Singscore index and macrozoobenthos. The results of the negative correlation value are caused by several families having a large tolerance value that can coexist with families that have a small tolerance value and the significant difference in the Singscore index value at each station which can affect the correlation value. In addition, PCA analysis showed that the physical parameters that affect the presence of macrozoobenthos in Situ Agathis include temperature, turbidity, and dissolved oxygen (DO)."

"Teknologi panel surya terapung yang diterapkan di Danau Mahoni Universitas Indonesia merupakan panel surya bifacial. Namun penutupan badan air oleh solar panel terapung dapat menyebabkan perubahan kualitas air secara temporal. Sejauh ini, belum terdapat penelitian lebih lanjut mengenai pengaruh solar panel terapung di perairan Indonesia. Maka dari itu, penelitian ini bertujuan untuk mencari pengaruh penutupan permukaan danau terutama pada produktivitas primer, COD, dan BOD serta hubungan produktivitas primer dengan BOD dan COD. Pengambilan sampel air dilakukan pada permukaan air, sedangkan perhitungan produktivitas primer menggunakan metode botol terang-gelap dan dilakukan inkubasi selama 3 jam. Secara temporal, nilai BOD, COD, dan produktivitas primer di bawah solar panel terapung, yang selanjutnya akan disebut titik 1, memiliki nilai kosentrasi yang lebih rendah dibandingkan dengan yang berada di lokasi yang terbuka, yang selanjutnya akan disebut titik 2. Rata-rata kosentrasi BOD di titik 1 yaitu 4.25 mg/l dan titik 2 yaitu 1.56 mg/l. Adapun rata-rata kosentrasi COD di titik 1 adalah 31.875 mg/l dan titik 2 adalah 33.125 mg/l. Sementara itu, rata-rata produktivitas primer titik 1 yaitu 36.46 mg C/m3/jam dan titik 2 yaitu 114.58 mg C/m3/jam. Hasil analisis uji independen t menunjukkan adanya penurunan yang signifikan pada nilai BOD dan produktivitas primer di area yang tertutup solar panel. Sedangkan, nilai COD tidak memiliki perbedaan yang signifikan antara kedua titik. Adapun hasil uji korealasi Pearson’s menunjukkan bahwa produktivitas primer tidak memiliki hubungan yang signifikan terhadap parameter BOD dan COD. Maka dari itu penutupan area badan air dengan solar panel terapung menurunkan kualitas air Danau Mahoni terutama pada parameter BOD, COD, dan produktivitas primer.

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The technology of floating photovoltaic applied at Lake of Mahoni, University of Indonesia were bifacial photovoltaic. However, its body of water which was covered by the floating photovoltaic could cause temporal changes in water quality. To date, there had been no further research on the effects of floating photovoltaic in the waters of Indonesia. Therefore, this research aimed to explore the effects of the covered lake surface especially on primary productivity, COD and BOD, also examined how primary productivity was related to BOD and COD. Water sampling was carried out on the surface of the water, meanwhile the primary productivity was calculated utilizing the method of light-dark bottle and incubated for 3 hours. Temporarily, the values of BOD, COD, and primary productivity under the floating photovoltaic, hereinafter referred to as station 1, had lower concentration values compared to those in open areas, hereinafter referred to as station 2. The average BOD concentration at station 1 was 4.25 mg/l and at station 2 was 1.56 mg/l. As for the average COD concentration at station 1 was 31.875 mg/l and at station 2 was 33.125 mg/l. Meanwhile, the average primary productivity at station 1 was 36.46 mg C/m3/hour and at station 2 was 114.58 mg C/m3/hour. The results of independent t test showed a significant decrease in the values of BOD and primary productivity in areas covered by floating photovoltaic. Meanwhile, the values of COD did not show a significant difference between the two stations. As for the results of the Pearson's correlation test suggest that primary productivity did not have a significant relationship with the parameters of BOD and COD. Therefore, covered body of water by floating photovoltaic reduced the water quality at Lake of Mahoni, especially in the parameters of BOD, COD, and primary productivity."

"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."

"Keberadaan mikroplastik di perairan dapat mengancam biota di dalamnya. Penelitian dilakukan dengan tujuan menganalisis kelimpahan, bentuk, dan warna mikroplastik pada air, sedimen, insang dan saluran pencernaan ikan sapu-sapu Pterygoplichthys pardalis dari Situ Kenanga dan Situ Mahoni, Kampus Universitas Indonesia, Depok. Pengambilan sampel air dan sedimen dilakukan pada inlet, midlet, dan outlet kedua situ. Sampel air disaring menggunakan plankton net, sampel sedimen diambil menggunakan Ekman grab kemudian dikeringkan menggunakan oven, sampel P. pardalis sebanyak 15 individu diambil menggunakan cast net dari masing-masing situ, kemudian insang dan saluran pencernaannya diisolasi dan didestruksi menggunakan HNO3 65%. Tiap sampel yang diperoleh dilarutkan dengan larutan NaCl jenuh agar terjadi flotasi. Pengamatan dilakukan menggunakan mikroskop cahaya dan Sedgwick Rafter Chamber untuk meletakkan sampel, dengan mengamati bentuk, warna, dan jumlah partikel mikroplastik. Hasil penelitian menunjukkan bahwa bentuk fiber, film, fragmen, granula, serta warna transparan, hitam, biru, dan merah muda ditemukan pada semua sampel. Kelimpahan mikroplastik di Situ Kenanga pada air sebanyak 48,26 ± 23,51 partikel L-1, sedimen 45837,04 ± 36305,97 partikel Kg-1, insang 290,48 ± 154,58 partikel g-1 atau 1156,44 ± 378,69 partikel ind-1, saluran pencernaan 134,37 ± 55,72 partikel g-1 atau 1364,89 ± 339,54 partikel ind-1. Kelimpahan mikroplastik di Situ Mahoni pada air sebanyak 48,63 ± 30,21 partikel L-1, sedimen 36237,04 ± 16702,60 partikel Kg-1, insang 287,23 ± 109,40 partikel g-1 atau 1153,78 ± 324,32 partikel ind-1, saluran pencernaan 123,77 ± 34,35 partikel g-1 atau 1304,44 ± 270,90 partikel ind-1. Tidak terdapat perbedaan signifikan antara kelimpahan mikroplastik di Situ Kenanga dan Situ Mahoni pada semua sampel.

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The presence of microplastics in the water could threaten the biota there. This study was conducted to analyze the abundance, shapes, and colors of microplastics in water, sediment, gills and digestive tract of amazon sailfin catfish Pterygoplichthys pardalis from Situ Kenanga and Situ Mahoni, Universitas Indonesia Campus, Depok. Sampling of water and sediment were carried out at the inlet, midlet, and outlet of both situ. Water samples were filtered using plankton net, sediment samples were taken using Ekman grab and dried using an oven, as many as 15 individual P. pardalis samples were taken using cast net from each situ, then their gills and digestive tract were isolated and pulverized using 65% HNO3. Each sample obtained was dissolved with saturated NaCl solution for flotation to occur. Observations were made using a light microscope and Sedgwick Rafter Chamber to place each sample, by observing the shape, color, and number of microplastic particles. The results showed that the shapes of fibers, films, fragments, granules, as well as transparent, black, blue, and pink colors were found in all samples. The abundance of microplastics in Situ Kenanga water was 48.26 ± 23.51 particles L-1, sediment 45837.04 ± 36305.97 particles Kg-1, gills 290.48 ± 154.58 particles g-1 or 1156, 44 ± 378.69 ind-1 particles, digestive tract 134.37 ± 55.72 particles g-1 or 1364.89 ± 339.54 ind-1 particles. The abundance of microplastics in Situ Mahoni water was 48.63 ± 30.21 particles L-1, sediment 36237.04 ± 16702.60 particles Kg-1, gills 287.23 ± 109.40 particles g-1 or 1153, 78 ± 324.32 ind-1 particles, digestive tract 123.77 ± 34.35 particles g-1 or 1304.44 ± 270.90 ind-1 particles. There was no significant difference between the abundance of microplastics in Situ Kenanga and Situ Mahoni in all samples."