Odonata are considered to be good indicators of environmental health and water quality with it's presence and diversity in the Jakabaring lake are (Water Ski and OPI). The research location (Water Ski and OPI) utilized by the community as water catchment areas (flood control), recreation and habitat. The Activity in the lake area can affect the benefit of the lake, affecting the quality of the lake waters as a living habitat for animals and plants. However, to describe the diversity of odonata as indicator of the waters in the area of Water Ski and Lake OPI lakes, there is no such thing, therefore the researchers to look at odonata diversity in the area of Water Ski Lake and Lake OPI Jakabaring Palembang-South Sumatera. The location of the study was determined using the purposive sampling method conducted in April 2018. The species found to identified at the FMIPA Animal Taxonomy Laboratory of Sriwijaya University. Sampling in the morning (07.00 -10.00 AM) and afternoon (15.00 -18.00 AM). The results of research in the lake area found 2 suborder, 2 families, 11 genere, and 18 species, the total number of all 984 individual species. Odonata species data obtained in the analysis using Past3 software. The diversity index in the Water Ski lake is 1.992 and the diversity index in the OPI lake is 1.758. Diversity index value (2.014), dominance index (0.7922) and evenness index (0.4165). Odonata and enviromental conditions of the lake (Water Ski and OPI) still have relationship, the condition of lake water quality is still below water quality criteria threshold. This is what makes the diversity on both lakes has a moderate value.

ABSTRAKPenelitian yang berjudul Keanekaragaman Gastropoda Pada Lingkungan Perairan Sungai Empayang Kabupaten Lahat Provinsi Sumatera Selatan ini bertujuan untuk mengetahui keanekaragaman jenis gastropoda yang terdapat dikawasan tersebut. Penelitian ini di laksanakan pada bulan oktober 2015, bertempat di kasawan sungai Empayang Kasap Desa Sukajadi Kabupaten Lahat. Metode Penelitian penentuan lokasi sampling adalah metode purposive random sampling dengan 5 stasiun pengambilan sampel, setiap stasiun dibagi menjadi 3 substasiun (bagian tepi 1, tengah, tepi 2) ditentukan dengan transek garis (line transect). Pengambilan sampel menggunakan waktu yaitu pagi dan sore. Hasil penelitian ini diperoleh 8 spesies gastropoda (Melanoides granifera, Elimia acuta, Brotia tetidinaria, Lymnae stagnalist, Lymnae rubiginosa, Pomacea canaliculata, Pila polita dan Menetus sp) dengan 7 genus, dan dari 6 suku (famili) dari 4 ordo. Indeks keanekaragaman rata-rata di kawasan sungai Empayang Kasap Sukajadi Kabupaten Lahat adalah sedang dengan kisaran 2,09-2,46. Tingkat keanekaragaman tertinggi terdapat pada stasiun V (2,46) dan terendah pada stasiun I (2,09). Sedangkan nilai dari indeks dominansi (C) dengan kisaran 0,17-0,26 di 5 stasiun dalam keadaan rendah, tingkat indeks dominansi tertinggi pada stasiun I (0,26) dan terendah pada stasiun III (0,17). Kondisi kualitas perairan sungai sangat mempengaruhi keberadaan gastropoda. Kata kunci : Sungai Empayang Kasap, Gastropoda, Keanekaragaman ABSTRACTThis research has been conducted with the tittle the diversity of gastropods on the river water environment Empayang Lahat regency of South Sumatra province. The aim of this research species diversity of gastropods contained the region. This research was implemented conducted in October 2015, a river Empayang Kasap Sukajadi Lahat regency. The methods of this research are purposive random sampling method with 5 sampling stations, each station is divided into three substations (edges first, middle, edge two) was determined by line transect. The data of the sample were taken in the morning and afternoon. The results of this research were obtained 8 species of gastropods (Melanoides granifera, Elimia acuta, Brotia tetidinaria, Lymnae stagnalist, Lymnae rubiginosa, Pomacea canaliculata, Pila polita and Menetus sp) with 7 genera, and of the six tribes (families) of 4 orders. The total index of the diversity in the river Empayang Kasap Sukajadi Lahat district was off 2.09 to 2.46. The highest levels of diversity found in the station V (2.46) and the lowest at the station I (2.09). While the value of dominance index (C) with a range of 0.17 to 0.26 at five stations in the lower state, the highest level of dominance index at station I (0.26) and the lowest at station III (0.17). River water quality conditions greatly affect the existence of gastropods.