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"Penelitian mengenai struktur komunitas gastropoda di Situ Agathis Universitas Indonesia telah dilakukan untuk menganalisis struktur komunitas gastropoda berdasarkan kepadatan individu tiap jenis, indeks keanekaragaman Shannon Wiener, indeks dominansi, dan indeks kemerataan. Pengambilan sampel gastropoda dilakukan dengan alat Ekman grab dan hand net di stasiun inlet, midlet, dan outlet Situ Agathis. Hasil penelitian menunjukkan bahwa kepadatan jenis gastropoda tertinggi dengan nilai 800 ind/m2 yaitu spesies Tarebia granifera dan kepadatan terendah dengan nilai 11,42 ind/m2 yaitu spesies Lymnaea rubiginosa. Sementara, hasil penghitungan indeks keanekaragaman jenis tergolong rendah dengan nilai berkisar antara 0,3–0,62, nilai indeks kemerataan tergolong rendah dan tidak merata dengan nilai berkisar antara 0,19–0,38, dan nilai indeks dominansi dengan nilai berkisar antara 0,56–0,86 yang menunjukkan adanya spesies yang mendominansi. Berdasarkan hasil pengukuran parameter fisika-kimia, kondisi perairan Situ Agathis buruk dan hanya spesies gastropoda tertentu saja seperti Pomacea canaliculata, Tarebia granifera, dan Melanoides tuberculata yang dapat menoleransi.

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Research on the structure of the gastropod community at Situ Agathis University of Indonesia has been carried out to analyze the structure of the gastropod community based on individual density each species, Shannon Wiener diversity index, dominance index, and evenness index. Sampling of gastropods was carried out using Ekman grab and hand net at the inlet, midlet, and outlet stations of Situ Agathis. The results showed that the highest density of gastropod species with a value of 800 ind/m2 was the species Tarebia granifera and the lowest density with a value of 11.42 ind/m2 was the species Lymnaea rubiginosa. Meanwhile, the results of the calculation of the species diversity index are classified as low with a values ranged from 0.3–0.62, the evenness index value is low with a values ranging from 0.19–0.38, and the dominance index values ranging from 0.56–0.86 which indicates the presence of a dominant species. Based on the result of measurment physic-chemical parameters, the water conditions of Situ Agathis are poor and only certain gastropod species such as Pomacea canaliculata, Tarebia granifera, and Melanoides tuberculata can tolerate it."

"Perifiton merupakan kumpulan mikroalga yang hidup menempel pada berbagai jenis substrat. Perifiton responsif terhadap gangguan faktor fisika-kimia perairan sehingga dapat dijadikan sebagai bioindikator. Penelitian bertujuan untuk mengetahui struktur komunitas perifiton sebagai bioindikator pencemaran air. Penelitian berlokasi di Situ Agathis UI yang terbagi menjadi 9 substasiun. Parameter fisika-kimia yang diukur terdiri dari suhu, turbiditas, arus, kecerahan, pH, oksigen terlarut, dan nitrat. Sampel perifiton diambil dengan mengerik cangkang M. tuberculata. Pencacahan perifiton dilakukan dengan metode subsampel. Identifikasi perifiton dilakukan sampai tingkat marga. Data yang diperoleh dianalisis secara statistik dengan Spearman Rank’s Correlation menggunakan STATCAL. Hasil penelitian menunjukkan perifiton yang ditemukan terdiri dari 16 marga yang berasal dari 6 kelas dan 5 divisi dengan rata-rata kepadatan sebesar 1.517-22.475 ind/mm². Indeks keanekaragaman perifiton tergolong sedang dan menunjukkan kondisi perairan Situ Agathis UI tergolong tercemar sedang (1 < H’ < 3). Indeks dominansi menunjukkan tidak adanya marga perifiton yang dominan dan persebaran individu tiap marga merata. Hasil uji statistik menunjukkan parameter suhu, turbiditas, dan arus berkorelasi signifikan (P-Value <0,05) terhadap kerapatan perifiton pada substrat cangkang M. tuberculata.

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Periphyton is an assembly of microalgae that live attached to various types of substrate. Periphyton is responsive to disturbances of water physico-chemical factors so that it can be used as a bioindicator. The aim of the study was to determine the periphyton community structure as a bioindicator of water pollution. The research is located at Agathis Small Lake UI which is divided into 9 substations. The physico-chemical parameters measured consisted of temperature, turbidity, current, brightness, pH, dissolved oxygen, and nitrate. Periphyton samples were taken by scraping the shells of M. tuberculata. Periphyton count was carried out using the subsample method. Periphyton identification was carried out up to the genera level. The Data obtained were analyzed statistically by Spearman Rank’s Correlation using STATCAL. The results showed that the periphyton found consisted of 16 genera from 6 classes and 5 divisions with an average of density of 1.517-22.475 ind/mm². The periphyton diversity index is classified as moderate and shows that the water conditions of Agathis Small Lake are classified as moderately polluted (1 < H’ < 3). The dominance index indicates the absence of dominant periphyton genus and the distribution of individuals for each genera is evenly distributed. The result of statistical tests showed that the parameters of temperature, turbidity, and current were significanly correlated (P-Value <0,05) with the density of periphyton on the shell substrate of M. tuberculata.

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"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."

"Telah dilakukan penelitian mengenai struktur komunitas Gastropoda di Situ Agathis Kampus UI, Depok. Penelitian tersebut bertujuan untuk mengetahui kepadatan, keanekaragaman, kemerataan, dan dominansi Gastropoda antara bulan November 2009 dan Januari 2010. Pengambilan sampel Gastropoda serta pengukuran parameter fisika dan kimia lingkungan dilakukan di 27 titik di Situ Agathis, yang terbagi atas tiga stasiun, masing-masing memiliki sembilan substasiun. Sampel Gastropoda yang berhasil didapatkan diidentifikasi dan dianalisis menggunakan indeks keanekaragaman Shannon-Wiener, indeks kemerataan, dan indeks dominansi Simpson. Pengambilan sampel di stasiun a (pinggir barat situ) dan c (tengah situ) dilakukan sebanyak satu kali pengulangan menggunakan Petersen grab, sedangkan pengambilan sampel di stasiun b (pinggir timur situ) dilakukan sebanyak dua kali pengulangan menggunakan serokan. Hasil penelitian menunjukkan terdapat delapan jenis Gastropoda yang ditemukan di Situ Agathis, yaitu: Bellamya javanica, Brotia costula, Brotia testudinaria, Indoplanorbis exustus, Melanoides granifera, Melanoides tuberculata, Pomacea canaliculata, dan Thiara scabra. Kepadatan Gastropoda tertinggi di Situ Agathis ditempati oleh Melanoides tuberculata, sebesar 3541 individu/m2. Tingkat keanekaragaman Gastropoda di Situ Agathis tergolong sedang, sebesar 1,669. Tingkat kemerataan Gastropoda di Situ Agathis tergolong hampir merata yaitu sebesar 0,802, dan tidak ada jenis Gastropoda yang mendominansi di Situ Agathis.

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A study of community structure of Gastropods have been done at Situ Agathis Kampus UI, Depok. The purpose of this study is to know density, diversity, evenness, and dominance of Gastropods, between November 2009 and January 2010. Gastropods sampling and measurement of environmental physical and chemical parameters carried out at 27 point in Situ Agathis, which is divided into three stations of each with nine substations. Gastropods sample were identified and analyzed using Shannon-Wiener diversity index, evenness index, and Simpson's dominance index. The samples at station a (west edge situ) and station c (middle situ) were grabed using a one-time repetition Petersen grab, while sampling at the station b (eastern edge situ) are taken twice using a brook repetition. The results showed there are eight spesies of gastropods have been found in Situ Agathis, namely : Bellamya javanica, Brotia costula, Brotia testudinaria, Indoplanorbis exustus, Melanoides granifera, Melanoides tuberculata, Pomacea canaliculata, and Thiara scabra. Melanoides tuberculata is the highest density Gastropod in Situ, amounting to 3541 individuals/m2. The level of diversity in Situ Agathis Gastropoda classified as moderate (H? = 1,669). The level of evenness in Situ Agathis Gastropoda pertained almost uniformly that is equal to 0,802, and there is no dominancy among Gastropod species found in Situ Agathis."

"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)."

"Penelitian tentang struktur komunitas hidrofita di Situ Agathis Kampus Universitas Indonesia Depok, Jawa Barat telah dilakukan pada bulan Juni--Juli 2011. Penelitian bertujuan untuk mengetahui struktur komunitas hidrofita yang meliputi keanekaragaman, dominansi, frekuensi, kerapatan, dan nilai penting di Situ Agathis. Analisis vegetasi tumbuhan dilakukan dengan metode purposive random sampling pada daerah inlet, midlet, dan outlet. Sampel tumbuhan yang diperoleh diidentifikasi menggunakan buku identifikasi tumbuhan air. Hasil penelitian menunjukkan terdapat 14 jenis hidrofita di Situ Agathis. Hasil penelitian juga menunjukkan bahwa keanekaragaman jenis hidrofita di Situ Agathis tergolong ?sedang? dan penyebaran jenis cukup merata; akan tetapi kesamaan jenis ?kurang sama? antara daerah inlet, midlet, dan outlet perairan. Jenis Eichhornia crassipes merupakan tumbuhan yang mendominasi dan memiliki nilai penting tertinggi di perairan Situ Agathis.

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A research regarding the community structure of hydrophyte in Lake Agathis at the University of Indonesia (UI) Campus Depok, West Java, has been conducted from June--July 2011. The research was aim to understand the community structure of hydrophyte, which include biodiversity, dominance, frequency, density, and importance values in Lake Agathis. The vegetation analysis for all area of study were done using the purposive random sampling method. The plant samples that were collected were then identified based on the morphological character using the hydrophyte identification book. Fourteen plant species were found in Lake Agathis. The result shows that the hydrophyte biodiversity in Lake Agathis was in a ?medium- abundant? category, the species dispersal was in an ?evenly enough? category, however the diversity of the inlet, midlet, and outlet area were ?dissimilar?. Eicchornia crassipes was the dominance species which also has the highest importance value in Lake Agathis."

"Situ Kenanga dan Situ Mahoni merupakan dua dari enam situ yang terletak di kawasan Universitas Indonesia, Depok yang dimanfaatkan sebagai penampung aliran air dan pengendali banjir. Kedua situ memiliki dua sumber aliran air yang berbeda dengan membawa limbah domestik dari pemukiman warga yang berpengaruh terhadap keadaan parameter lingkungan perairan dan struktur komunitas organisme, khususnya fitoplankton, di kedua situ. Penelitian telah dilakukan pada bulan Januari – Juni 2022 dengan metode pengambilan sampel fitoplankton dilakukan secara bebas menggunakan plankton net (mata jaring 20 μm). Jumlah marga fitoplankton yang ditemukan pada Situ Kenanga berjumlah 15 marga, terdiri dari Chlorophyta (7 marga dan kelompok coccoid green algae), Cyanophyta (5 marga), Bacillariophyta (2 marga) Euglenophyta (2 marga), Cyanophyta (4 marga), dan Charophyta (1 marga). Sementara itu, fitoplankton pada perairan Situ Mahoni ditemukan sebanyak 18 marga yang berasal dari divisi Chlorophyta (9 marga dan kelompok coccoid green algae), Bacillariophyta (4 marga) Euglenophyta (3 marga), dan Cyanophyta (2 marga). Rerata kelimpahan fitoplankton pada Situ Kenanga (17.316,67 plankter/L) lebih tinggi dibandingkan rerata kelimpahan fitoplankton Situ Mahoni (12.716,67 plankter/L). Rerata indeks keanekaragaman (H’) pada Situ Kenanga dan Situ Mahoni masing-masing sebesar 1,829 dan 1,234 atau tergolong pencemaran sedang. Rerata indeks keseragaman (E) Situ Kenanga dan Situ Mahoni berturut-turut sebesar 0,660 dan 0,419 yang menunjukkan Situ Kenanga memiliki sebaran individu per marga fitoplankton yang lebih merata dibandingkan Situ Mahoni. Indeks dominansi (C) Situ Kenanga (0,285) lebih rendah atau tidak adanya individu fitoplankton yang mendominasi dibandingkan pada Situ Mahoni (0,461). Analisis Structural Equation Modeling (SEM) menunjukkan bahwa parameter fisika berupa suhu serta parameter kimia berupa nitrat dan fosfat berpengaruh signifikan dan linear terhadap struktur komunitas fitoplankton di Situ Kenanga dan Situ Mahoni.

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Situ Kenanga and Situ Mahoni are two of six lakes located in the University of Indonesia area, Depok which are used as water reservoirs and flood control. Both lakes have two different sources carrying domestic waste from residential areas which affect the state of aquatic environmental parameters and community structures of organisms, especially phytoplankton, in both lakes. The research was carried out in January – June 2022 with the method of taking phytoplankton samples was done freely using plankton net (20 μm mesh size). The number of phytoplankton genera found in Situ Kenanga was 15 genera, consisting of Chlorophyta (7 genera and group of coccoid green algae ), Cyanophyta (5 genera), Bacillariophyta (2 genera) Euglenophyta (2 genera), Cyanophyta (4 genera), and Charophyta (1 genus). Meanwhile, phytoplankton in Situ Mahoni were found as many as 18 genera from the divisions of Chlorophyta (9 genera dan group of coccoid green algae), Bacillariophyta (4 genera), Euglenophyta (3 genera), and Cyanophyta (2 genera). The average abundance of phytoplankton in Situ Kenanga (17,316.67 plantkter/L) was higher than the average abundance of phytoplankton in Situ Mahoni (12,716.67 plantkter/L). The average diversity index (H') in Situ Kenanga and Situ Mahoni are 1,829 and 1,234, respectively, or classified as moderate pollution. The average evenness index (E) of Situ Kenanga and Situ Mahoni was 0,660 and 0,419, respectively, which indicated that Situ Kenanga had a more even distribution of phytoplankton individuals per genera than Situ Mahoni. The dominance index (C) of Situ Kenanga (0,285) is lower or no phytoplankton individuals dominating compared to Situ Mahoni (0,461). Structural Equation Modeling (SEM) analysis showed that physical parameters such as temperature and chemical parameters such as nitrate and phosphate had a significant and linear effect on the phytoplankton community structure in Situ Kenanga and Situ Mahoni."

"Fluktuasi kondisi fisik dan kimia pada bulan Februari dan Agustus 2020, berpengaruh terhadap struktur komunitas dan kandungan klorofil fitoplankton di Situ Agathis. Keberadaan fitoplankton yang sedikit di perairan akan berdampak negatif terhadap stabilitas ekosistem dan produktivitas organisme lain di perairan. Penelitian bertujuan untuk mengetahui perbedaan kandungan klorofil dan struktur komunitas fitoplankton di Situ Agathis pada bulan Februari dan Agustus 2020, serta keterkaitan dengan parameter fisik dan kimia. Penelitian dilakukan pada bulan Februari untuk mewakili musim hujan dan Agustus untuk musim kemarau. Dilakukan pengukuran parameter fisik dan kimia, serta pengambilan sampel fitoplankton pada bagian inlet, midlet, dan outlet di Situ Agathis. Hasil penelitian menunjukkan bahwa terdapat perbedaan kelimpahan fitoplankton secara signifikan di Situ Agathis pada bulan Februari dan Agustus 2020. Namun, tidak terdapat perbedaan keanekaragaman, kemerataan, dominansi, dan kandungan klorofil fitoplankton yang signifikan di Situ Agathis pada bulan Februari dan Agustus 2020.

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Fluctuations in physical and chemical conditions in February and August 2020, affected the community structure and chlorophyll content of phytoplankton in Situ Agathis. Low phytoplankton presence has a negative impact on ecosystem stability and other organisms’ productivity in the water body. The study aims to determine whether there is a difference in chlorophyll content and community structure of phytoplankton in Situ Agathis, in February and August 2020, as well as the relationship with the physical and chemical parameters. The research was conducted in February to represent the wet season and August to represent the dry season. Physical and chemical parameters were measured, and phytoplankton was sampled at the inlet, middle, and outlet parts of Situ Agathis. The results showed that there was a significant difference in Situ Agathis’ phytoplankton abundance in February and August 2020. However, there was no significant difference in the diversity, evenness, dominance, and chlorophyll content of phytoplankton in Situ Agathis in February and August 2020."

"Situ Kenanga dan Situ Agathis Universitas Indonesia memiliki aliran masukan limbah yang berasal dari DAS Ciliwung-Cisadane dan limbah domestik dari pemukiman. Berbagai macam kegiatan antropogenik yang terjadi di sepanjang aliran DAS dan sekitar situ memungkinkan masuknya material lain ke dalam kolom perairan sehingga kualitas perairan menurun hingga ke tangka tertentu. Penelitian ini bertujuan untuk mengetahui status tingkat cemaran organik di Situ Kenanga dan Situ Agathis berdasarkan Indeks Saprobik. Penelitian dilakukan pada bulan Maret hingga Juni 2022. Penelitian mengenai tingkat cemaran organik di Situ Kenanga dan Situ Agathis UI dilakukan masing-masing pada tiga stasiun berdasarkan pemilihan lokasi yang sering dilakukan di sekitar Situ. Hasil pencacahan plankton dari Situ Kenanga diperoleh empat divisi fitoplankton (Cyanophyta, Chlorophyta, Euglenophyta, dan Bacillariophyta) dan empat filum zooplankton (Protozoa, Rotifera, Gastroricha, dan Arthropoda). Sedangkan di Situ Agathis diperoleh lima divisi fitoplankton (Cyanophyta, Chlorophyta, Euglenophyta, Bacillariophyta, dan Chrysophyta) dan empat filum zooplankton (Protozoa, Rotifera, Gastroricha, dan Arthropoda). Situ Kenanga memiliki nilai indeks saprobik berkisar antara -0,94 hingga -1,11. Nilai tersebut menunjukkan bahwa Situ Kenanga berada di fase α- mesosaprobik/ polisaprobik. Situ Agathis memiliki nilai indeks saprobik berkisar antara -1,56 hingga -1,80. Nilai tersebut menunjukkan bahwa Situ Agathis berada di fase polisaprobik/α- mesosaprobik. Kedua fase tersebut menunjukkan bahwa Situ Kenanga dan Situ Agathis memiliki tingkat pencemaran limbah organik yang cukup berat.

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Situ Kenanga and Situ Agathis University of Indonesia have an input stream of waste originating from Ciliwung-Cisadane watershed and domestic waste from settlements. Various kinds anthropogenic activities that occur along the watershed and around Situ allow the entry of other materials into the water column so that the water quality decreases to a certain level. This research aims to determine the status of organic contamination levels in Situ Kenanga and Situ Agathis based on the Saprobic Index. The research has been conducted from March to June 2022. Research on the level of pollution in Situ Kenanga and Situ Agathis UI has been conducted at three stations respectively based on the location selection that are often carried out around the lake. The results of plankton enumeration from Situ Kenanga obtained four phytoplankton divisions (Cyanophyta, Chlorophyta, Euglenophyta, and Bacillariophyta) and four zooplankton phyla (Protozoa, Rotifera, Gastroricha, and Arthropoda). Meanwhile, at Situ Agathis, there were five divisions of phytoplankton (Cyanophyta, Chlorophyta, Euglenophyta, Bacillariophyta, and Chrysophyta) and four phyla of zooplankton (Protozoa, Rotifera, Gastroricha, and Arthropoda). Situ Kenanga has a saprobic index value ranging from -0,94 to -1,11. This value indicates that Situ Kenanga is in the α-mesosaprobic/polysaprobic phase. Situ Agathis has saprobic index value ranging from -1,56 to -1,80. This value indicates that Situ Agathis is in the polysaprobic/α-mesosaprobic phase. The two phases indicate that the waters of Situ Kenanga and Situ Agathis have a fairly heavy level of organic waste pollution."

"Studi struktur komunitas ikan di Situ Salam Kampus Universitas Indonesia (UI) Depok, telah dilakukan untuk mengetahui struktur komunitas ikan dengan mengacu pada komposisi, dominasi, kegelapan, dan keanekaragamannya. Sampel ikan diambil di empat titik yaitu Salam inlet, Salam midlet, zikon pond, dan Salam toko. Hasil penelitian menunjukkan bahwa 10 spesies ikan ditemukan, yaitu Amphilopus citrinellus, Barbodes binotatus, Clarias batrachus, Channa striata, Oreochromis mossambicus, Oreochromis niloticus, Poecilia reticulata, Pterygoplichthys pardalis, Trichopodus pectoralis, dan Trichopodus trichopterus. Komposisi ikan tertinggi dari danau Salam adalah Pterygoplichthys pardalis itu Senyawa sekitar 54%. Outlet Salam memiliki total spesies tertinggi dengan 9 spesies. Zikon tambak adalah lokasi dengan indeks keanekaragaman tertinggi dengan nilai 1,34.

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A study of fish community structure at Situ Salam Kampus Universitas Indonesia (UI) Depok, has been conducted to know the structure community of fish with reference to composition, domination, eveness, and its diversity. Fish samples were taken at four spots that is Salam inlet, Salam midlet, zikon pond, and Salam outlet. Result of research showed that 10 species of fish were found, those are Amphilopus citrinellus, Barbodes binotatus, Clarias batrachus, Channa striata, Oreochromis mossambicus, Oreochromis niloticus, Poecilia reticulata, Pterygoplichthys pardalis, Trichopodus pectoralis, and Trichopodus trichopterus. Highest fishes composition of Salam lakes are Pterygoplichthys pardalis that compound about 54%. Salam outlet has highest species total with9 species. Zikon pond were the location with the highest diversity index with value1.34."