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"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."

"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%."

"The research of the Gastropoda community structure in Pangkal Babu Mangrove forest was conducted on January until February 2012. The researcher used Purposive Random Sampling Method. There are 1950 Gastropods in mangrove forest of Pangkal Babu which consist of 15 species, 11 genera, and six families. From the 15 species, there are two types of the species which have a high frequency of subsistence. They are Cerithidea obtusa and Cassidula aurisjudae, that is 93.33% for each. The range of Gastropoda relative density is between 28 ind/m2-58.1 ind/m2, species diversity ranges from 1.5 to 1.9, evenness of species is between 0.553 to 0.684 and the distribution of species ranges from 2.4 to 3.9. In measuring of abiotic parameter, the temperature showed 29oC--34oC. Substrate salinity values at the research site varies between 20 ? -- 26 ?. Substrate type heavy foundation at Station 1, 2, and 3 in the Pangkal Babu Mangrove forest is a kind of mud contour and the degree of acidity of the mud (pH) varies between 5- 7. Spearman correlation test results indicated there is no correlation between the density of Gastropoda and abiotic parameters."