Limnotek : perairan darat tropis di Indonesia最新文献

{"title":"STUDI FITOREMEDIASI SERAPAN BESI (Fe) DARI KOLAM BEKAS TAMBANG BAUKSIT MENGGUNAKAN PURUN (Eleocharis sp.)","authors":"Shela Novayanti Wulan, Tri Apriadi, W. R. Melani","doi":"10.14203/LIMNOTEK.V27I2.270","DOIUrl":"https://doi.org/10.14203/LIMNOTEK.V27I2.270","url":null,"abstract":"Abstrak Kolam bekas tambang bauksit di Kelurahan Senggarang, Kota Tanjung Pinang memiliki kandungan besi yang meskipun masih di bawah ambang batas baku mutu, namun berpotensi mengalami biomagnifikasi logam besi. Selain mengandung besi, kolam bekas tambang bauksit tersebut banyak ditumbuhi oleh tumbuhan mencuat yaitu purun (Eleocharis sp.). Air kolam bekas tambang bauksit juga dimanfaatkan warga sekitar untuk mandi dan mencuci. Tujuan penelitian ini yaitu untuk mengetahui kemampuan purun menyerap besi (Fe) dari air kolam bekas tambang bauksit di Kota Tanjung Pinang. Penelitian dilakukan melalui eksperimen di laboratorium menggunakan rancangan acak lengkap terhadap biomassa purun yang berbeda, yaitu 250 g, 500 g, dan 0 g (kontrol) selama 30 hari. Penelitian ini menunjukkan perbedaan yang nyata antara perlakuan biomassa purun 250 g dan 500 g dalam menyerap besi dari hari ke-0 hingga hari ke-30. Biomassa purun 500 g mampu menyerap besi sebesar 80,1%, sedangkan kemampuan penyerapan besi biomassa purun 250 g hanya 17,1%. Penelitian ini mengonfirmasi bahwa akar purun lebih efektif dalam menyerap dan menyimpan logam besi daripada bagian batang. Kata kunci: fitoremediasi, besi (Fe), purun (Eleocharis sp.), tambang bauksit, Tanjung Pinang Abstract Phytoremediation Study of Iron (Fe) Absorption from Former Bauxite Mine Ponds Using Hairgrass (Eleocharis sp.) . The former bauxite mining ponds in Senggarang Village, Tanjung Pinang City showed iron content which, although still below the permitted threshold, has the potential to experience metal iron biomagnification. In addition to containing iron, these former bauxite mining ponds are overgrown with emergent aquatic plants, such as hairgrass (Eleocharis sp.). The water from these ponds is also used by local residents for bathing and washing. The purpose of this study was to determine the ability of hairgrass to absorb iron (Fe) from bauxite mining pond water in Tanjung Pinang City. The research was conducted through laboratory experiments using a completely randomized design method on different hairgrass biomass, i.e. 250 g, 500 g, and 0 g (control) for 30 days. This study showed a significant difference between the treatment of hairgrass biomass of 250 g and of 500 g in absorbing iron from day 0 to day 30. The hairgrass biomass of 500 g was able to absorb iron up to 80.1%, while the iron absorption capacity of 250 g of hairgrass biomass was only 17.1%. This study confirmed that hairgrass roots were more effective at absorbing and storing ferrous metals than the stems. Keywords: phytoremediation, iron (Fe), hairgrass (Eleocharis sp.), bauxite mine, Tanjung Pinang","PeriodicalId":371545,"journal":{"name":"Limnotek : perairan darat tropis di Indonesia","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117015650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"HUBUNGAN ANTARA STRUKTUR KOMUNITAS PLANKTON DAN TINGKAT PENCEMARAN DI SITU GUNUNG PUTRI, KABUPATEN BOGOR","authors":"Thoriq Ilham, Zahidah Hasan, Y. Andriani, Heti Herawati, Fachmijany Sulawesty","doi":"10.14203/LIMNOTEK.V27I2.282","DOIUrl":"https://doi.org/10.14203/LIMNOTEK.V27I2.282","url":null,"abstract":"The purpose of this study was to determine the level of pollution of Situ Gunung Putri waters based on the plankton community. This research was conducted from February to March 2019. This research was carried out in situ at Situ Gunung Putri Bogor and ex situ at the Limnology Research Center of the Indonesian Institute of Sciences, Cibinong, Bogor, West Java. The method used is the survey method while the plankton calculation uses the Sedgewick Rafter method. The results of this study showed that plankton diversity consisted of four phytoplankton phyl um and two zooplankton phyl um with saprobi c index value of 0.16 indicating that the waters experienced moderate levels of pollution and belonged to the I² / I± -Mesosaprobic phase.","PeriodicalId":371545,"journal":{"name":"Limnotek : perairan darat tropis di Indonesia","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133397451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ECOSYSTEM METABOLISM AND OXYGEN DEFICIT IN LAKE MANINJAU: INSIGHT FROM HIGH-FREQUENCY MEASUREMENT","authors":"A. B. Santoso, E. Triwisesa","doi":"10.14203/LIMNOTEK.V27I2.306","DOIUrl":"https://doi.org/10.14203/LIMNOTEK.V27I2.306","url":null,"abstract":"High-frequency measurement provides a sophisticated insight in capturing environmental pattern. Compared to traditional discrete measurement, high-frequency sensors allow better understanding of any processes particularly those with temporal scale characteristics. Lake metabolism is one of the exemplars getting advantage of such better resolution measurement. The dynamics of dissolved oxygen concentration (DO) observed in hourly manner, even in minutes, may explain the balance of photosynthetic activity as expressed by gross primary production (GPP) and respiration (R), and atmospheric exchange. Using a coupled thermistor-chain and oxygen sensor, we computed lake metabolism of the eutrophic Lake Maninjau. Characterized by high phytoplankton productivity fueled by the abundance of nutrient availability, DO concentration in Lake Maninjau is likely to be supersaturated. On the other hand, floating cage aquaculture operated in the lake may have a consequence in increasing water column heterotrophy, oxygen demanding community. Through a simple mathematical model we revealed that water column respiration in Lake Maninjau is higher than gross primary production (R > GPP) with an average of 12.1 mg O 2 L -1 day -1 and 9.0 mg O 2 L -1 day -1 , respectively. Our findings highlight that as heterotrophy in eutrophic lakes may relatively be high, oxygen depletion in the water column may occur in any instance, especially in lakes where dense floating cage aquaculture is in place. Keywords: lake metabolism, dissolved oxygen, high-frequency monitoring, heterotrophy","PeriodicalId":371545,"journal":{"name":"Limnotek : perairan darat tropis di Indonesia","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131870951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KINERJA PERTUMBUHAN DAN KELANGSUNGAN HIDUP IKAN PATIN PASUPATI (Pangasius sp.) PADA KECEPATAN ARUS BERBEDA","authors":"Djamhuriyah S. Said, N. Mayasari, Nina Hermayani Sadi, Agus Waluyo, Eva . Nafisyah","doi":"10.14203/LIMNOTEK.V27I2.314","DOIUrl":"https://doi.org/10.14203/LIMNOTEK.V27I2.314","url":null,"abstract":"Abstrak Ikan Patin (Pangasius sp.) hidup secara alami di sungai dan memiliki ciri berkulit halus. Pemeliharaan ikan Patin dengan padat tebar yang cukup tinggi membutuhkan sistem pemeliharaan khusus, seperti sistem berarus. Penelitian ini mempelajari pengaruh arus terhadap kinerja pertumbuhan dan kelangsungan hidup ikan Patin Pasupati yang merupakan hasil persilangan antara ikan Patin Siam dengan ikan Patin Jambal. Penelitian dilakukan selama 93 hari (November 2018-Februari 2019) di Laboratorium Akuatik, Pusat Penelitian Limnologi LIPI menggunakan bak fiberglas persegi panjang bervolume 875 L yang dilengkapi dengan sistem resirkulasi. Variasi kecepatan arus yang digunakan yaitu A (0 m/s), B (0,2 m/s), dan C (0,4 m/s). Ikan Patin yang diteliti berukuran panjang dan berat awal 13,64 ± 1,26 (12-14) cm dan 24,41 ± 3,87 (22,07-29.19) g dengan kepadatan awal 40 ekor/bak. Analisis data yang dilakukan secara deskriptif memperlihatkan bahwa perlakuan C memberikan hasil tertinggi pada 90% parameter pertumbuhan ikan yang diamati, yaitu panjang akhir 31,17 ± 0,78 cm, berat akhir 295,72 ± 43,02 g, pertambahan panjang 17,53 ± 0,78 cm, pertambahan berat 271,31 ± 43,02 g, pertumbuhan spesifik (SGR) panjang 0,89 ± 0,03% dan SGR berat 2,68 ± 0,15%, pertumbuhan panjang 0,19 ± 0,01 cm/hari, pertumbuhan berat 2,92 ± 0.46 g/hari, dan kelangsungan hidup (SR) 87,98 ± 10,84%. Namun, nilai rasio konversi pakan (FCR) ketiga perlakuan relatif sama. Kecepatan arus tidak berpengaruh pada nilai FCR dan peningkatan arus tidak diiringi dengan peningkatan jumlah pakan. Penelitian ini belum mendapatkan kecepatan arus optimal untuk pertumbuhan dan kelangsungan hidup ikan Patin Pasupati. Oleh karena itu, penelitian lanjutan diperlukan untuk mengetahui kecepatan arus optimal yang akan menghasilkan pertumbuhan maksimal ikan Patin Pasupati. Kata kunci: kecepatan arus, pertumbuhan, kelangsungan hidup, ikan Patin Pasupati Abstract Growth Performance and Survival of Pangasius Pasupati (Pangasius sp.) at Different Flow Rates. Pangasius is a freshwater fish with a typical delicate skin. A research of water flow effects on growth performance and survival of Pangasius Pasupati has been conducted with three replications in the Laboratory of the Research Center for Limnology LIPI for 93 days (November 2018-February 2019). Pangasius Pasupati is the hybrid of Pangasianodon hypopthalmus and Pangasius djambal . The initial length and weight of fish samples were 13,64 ± 1,26 (12-14) cm and 24,41 ± 3,87 (22.07-29.19) g respectively. Three flow rate treatments were tested, i.e. A (0 m/s as a control), B (0,2 m/s), and C (0,4 m/s). An initial density of 40 fish were reared in a rectangular fiberglass basin filled with 875 L of water using a recirculation system. The data obtained were analyzed descriptively and showed that the treatment C gave the highest yield on 90% of the observed fish growth parameters, which were the final length (31,17 ± 0,78 cm), weight size (295,72 ± 43,02 g), length gain (17,53","PeriodicalId":371545,"journal":{"name":"Limnotek : perairan darat tropis di Indonesia","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116709436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}