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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."

"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."

"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."

"Penelitian struktur komunitas mangrove asosiasi di kawasan tambak silvofishery Blanakan telah dilakukan sejak Februari hingga Agustus 2019. Penelitian ini bertujuan untuk mengetahui dan membandingkan struktur komunitas mangrove asosiasi yang dekat dan jauh dari sumber polutan logam berat di kawasan tambak silvofishery Blanakan, Subang, Jawa Barat, meliputi komposisi jenis, keanekaragaman, kemerataan, dominansi, kerapatan relatif, frekuensi relatif, penutupan relatif, dan Indeks Nilai Penting (INP). Data komunitas mangrove asosiasi diambil dari 3 stasiun, yang masing-masing terdiri atas 3 tambak. Pengambilan data di setiap tambak dilakukan dengan metode belt transect berukuran 1m × 100m sejumlah 4 belt transect. Pengukuran faktor abiotik dilakukan di setiap tambak. Mangrove asosiasi diidentifikasi dan dianalisis menggunakan indeks keanekaragaman Shannon-Wiener, indeks kemerataan Pielou, indeks dominansi Simpson, Kerapatan Relatif jenis, Frekuensi Relatif jenis, Penutupan Relatif jenis, dan Indeks Nilai Penting. Hasil penelitian diperoleh 19 jenis mangrove asosiasi dari 12 suku. Komposisi jenis komunitas mangrove asosiasi di stasiun II yang berada jauh dari sumber polutan logam berat, lebih banyak dibandingkan di stasiun I dan III yang berada dekat dengan sumber polutan logam berat. Keanekaragaman jenis mangrove asosisasi tinggi sementara penyebaran jenis hampir merata di setiap stasiun. Namun, tidak terdapat jenis yang mendominasi komunitas tersebut. Komunitas mangrove asosiasi dalam keadaan stabil dan faktor abiotik masih mendukung keberadaan komunitas tersebut. Chloris barbata Sw. (vide Bor) memiliki kerapatan relatif tertinggi sebesar 41,13% pada stasiun I. Ischaemum muticum memiliki frekuensi relatif tertinggi sebesar 28,59% pada stasiun I. Pluchea indica L. memiliki INP sebesar 73,65% pada stasiun II. Sesuvium portulacastrum L. memiliki penutupan relatif tertinggi sebesar 50,12% dan INP tertinggi sebesar 99,81% pada stasiun III.

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Community structure study of associated mangrove at Blanakan Silvofishery Pond was done from February until August 2019. The purpose of this study is to know and compare the community structure of associated mangrove near and far from the source of heavy metal pollutants in the Blanakan silvofishery pond area, Subang, West Java, including species composition, diversity, evenness, dominance, relative density, relative frequency, relative closure, and Important Value Index (IVI). Data of associated mangrove community were collected from 3 stations and each station consist of 3 ponds. The sampling community data on each pond was done using belt transect method with 1 × 100 square meter as many as 4 belt transects. Measurement of abiotic factors was done on each pond. Associated mangrove were identified and analyzed using the Shannon-Wiener diversity index, Pielou evenness index, Simpson dominance index, Species Relative Density, Species Relative Frequency, Species Relative Closure, and Important Value Index. The results showed that there were 19 species of associated mangrove from 12 families. The species composition of the associated mangrove community at station II which far from the sources of heavy metal pollutants, more than in station I and III which are close to the sources of heavy metal pollutants. Species diversity of associated mangrove is high while species distribution is almost evenly distributed at each station. However, there is no dominant species in community. The associated mangrove community was in stable condition and the abiotic factors still support the existence of the community. Chloris barbata Sw. (vide Bor) has the highest relative density, as many as 41,13% at station I. Ischaemum muticum has highest relative frequency, as many as 28,59% at station I. Pluchea indica L. has IVI as many as 73,65% at stasion II. Sesuvium portulacastrum L. has the highest relative closure as many as 50,12% and the highest IVI as many as 99,81% at station III.

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"Penelitian tentang struktur komunitas Gastropoda di Situ Salam Kampus Universitas Indonesia, Depok telah dilakukan untuk mengetahui struktur komunitas Gastropoda di Situ Salam UI yang berkaitan dengan kelimpahan relatif, komposisi, dominansi, kemerataan dan keanekaragaman jenisnya. Pengambilan sampel Gastropoda dilakukan pada 9 stasiun penelitian dengan tiga kali pengulangan. Hasil penelitian menunjukkan jumlah jenis Gastropoda yang ditemukan di Situ Salam sebanyak 9 jenis, yaitu Bellamya javanica, Brotia costula, Brotia testudinaria, Indoplanorbis exustus, Lymnea rubiginosa, Melanoides granifera, Melanoides tuberculata, Pomacea canaliculata dan Thiara scabra. Stasiun 7 yang merupakan lokasi outlet memiliki jumlah jenis tertinggi, yaitu sebanyak 9 jenis dan memiliki nilai indeks keanekaragaman tertinggi dengan nilai indeks sebesar 1,74. Jenis Gastropoda yang memiliki kelimpahan relatif tertinggi di Situ Salam adalah Melanoides tuberculata 48,5%.

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A study of Gastropoda community at Situ Salam Kampus Universitas Indonesia (UI) Depok, has been conducted to know the structure community of Gastropods with reference to relative abundance, composition, domination, eveness and its diversity. Gastropods samples and abiotic parameters were taken at 9 stations with three repetitions. Result of research showed that 9 species of Gastropods were found, those are Bellamya javanica, Brotia costula, Brotia testudinaria, Indoplanorbis exustus, Lymnea rubiginosa, Melanoides granifera, Melanoides tuberculata, Pomacea canaliculata and Thiara scabra. Station 7 which located at outlet of the Situ Salam has the highest number of species as well as highest diversity index that is 9 species and H? = 1,74, respectively. Melanoides tuberculata was the most abundance species with the relative abundance value of 48,5%."