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All Journal Bumi Lestari Ecotrophic, Journal of Environmental Science Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Buletin Anatomi dan Fisiologi (Bulletin of Anatomy and Physiology) Jurnal Ilmiah Sains Jurnal Wilayah, Kota dan Lingkungan Berkelanjutan
I Made Sara Wijana
Program Studi Biologi, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Udayana
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Energy Environmental Science Health Professions Mathematics Medicine & Pharmacology Physics Public Health Transportation

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Struktur dan Komposisi Vegetasi pada Suksesi di Muara Sungai Unda, Kabupaten Klungkung, Bali I Made Saka Wijaya; Gede Surya Indrawan; Putu Angga Wiradana; I Made Sara Wijana; Abd. Rahman As-syakur; Adi Ariyanto Wibisono; Viryanando Evan Rahardja
JURNAL ILMIAH SAINS Volume 21 Nomor 1, April 2021
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1094.862 KB) | DOI: 10.35799/jis.21.1.2021.31744

Abstract

 Letusan Gunung Agung pada tahun 1963 memberikan dampak ekologis di sekitar muara Sungai Unda, Kabupaten Klungkung, Bali. Lahar yang mengalir melalui sungai tersebut menyebabkan terjadinya suksesi primer akibat tutupan pasir dan batu. Selama 57 tahun, muara Sungai Unda tidak hanya mengalami suksesi alam, tetapi juga mengalami suksesi antropogenik melalui pemanfaatan sebagai tambang pasir, lahan pastura, dan permukiman sementara.  Penelitian ini bertujuan untuk mempelajari struktur dan komposisi vegetasi pada suksesi di muara Sungai Unda. Penentuan struktur vegetasi dilakukan pada 8 stasiun penelitian dengan menggunakan metode plot dengan jumlah 24 plot pohon (20 x 20 m) dan 48 plot vegetasi lantai (1 x 1 m). Data dianalisis menggunakan parameter ekologis seperti densitas, densitas relatif, frekuensi, frekuensi relatif, dominansi, dominansi relatif, dan nilai penting, serta dilengkapi dengan indeks keragaman Shannon-Weiner (H’), indeks dominansi (C), dan indeks keseragaman (E). Hasil penelitian menunjukkan bahwa semak dan rumput merupakan bentuk hidup yang paling menentukan struktur vegetasi di Muara Sungai Unda. Beberapa spesies penyusun vegetasi tersebut merupakan tumbuhan invasif seperti yang harus dikontrol populasinya adalah Typha angustifolia, Ipomoea carnea, Chromolaena odorata, Lantana camara, dan Vachellia farnesiana. Berdasarkan indeks yang digunakan, keanekaragaman vegetasi termasuk dalam kategori tinggi, tanpa ada jenis yang mendominasi, dengan persebaran yang merata.Kata kunci: Gunung Agung; spesies invasive; suksesi antropogenik; vegetasi suksesiStructure and Composition of Successional Vegetation in Unda River, Klungkung Regency, BaliABSTRACTMount Agung eruption in 1963 caused major ecological impact around Unda River, Klungkung Regency, Bali. The volcanic mudflow that surpass the Unda River watershed initiate the primary succession in those areas. This research aimed to study the structure and composition of successional vegetation in Unda River. Twenty-four tree plots (20 x 20 m) and 48 understorey plots (1 x 1 m) derived from 8 research stations were used to determine the structure of vegetation. The data analyzed by ecological parameters, such as density, relative density, frequency, relative frequency, dominancy, relative dominancy, and importance value, then completed with Shannon-Weiner diversity index (H’), dominancy index (C), and evenness index (E). The results shown that the vegetation structure in Unda River determined by two major growth form: shrubs and grasses. Some notable invasive species that should be controlled are Typha angustifolia, Ipomoea carnea, Chromolaena odorata, Lantana camara, and Vachellia farnesiana. Based on the three indexes, the vegetation diversity was categorized as high diversity, without any species domination, and the distribution of the species are uniformKeywords: Anthropogenic succession; invasive species; Mount Agung; successional vegetation
INDEKS STRUKTUR KOMUNITAS DAN SAPROBITAS PLANKTON SERTA CHECKLIST KEBERADAAN NEKTON DI PERAIRAN DANAU BERATAN, BALI Gede Surya Indrawan; I Made Sara Wijana; I Made Saka Wijaya; Abd. Rahman As-syakur; I Putu Sugiana; I Made Yunarta
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 16 No 2 (2022)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/EJES.2022.v16.i02.p10

Abstract

Beratan Lake was mainly popular for tourism and aquaculture activities that affecting water's environmental characteristics. The water healthiness indicator can be seen through the organism's existence, namely plankton to nekton biota that can be uses as an essential parameter in monitoring water conditions. This study aims to determine the plankton community structure index, saprobity index and the presence of nektons in the Beratan Lake. Plankton were sampled using the pouring method while the nekton sample was taken randomly through direct sampling with fishing nets and conducted interviews with the surrounding local community and fishermen. The results of the study found that the abundance of phytoplankton was dominated by Staurastrum with abundance level 1,836.92 ind/L. Meanwhile, the zooplankton was dominated by Rotifera with abundance level 8.17 ind/L. The diversity index, uniformity and dominance of phytoplankton are 1.31, 0.60 and 0.33 respectively, while the saprobity index is 1.08 which classifies the waters of Beratan Lake as being in a lightly polluted condition. There were 18 species of nektons in Beratan Lake were found, with one endemic species Rasbora balinensis and 13 foreign fish. There also an invasive species, namely zebrafish (Amatitlania nigrofasciata) was found in this Lake. From the results of the study, we hope that the government in cooperation with the surrounding community, can control the ecological conditions of the waters of Beratan Lake, especially the presence of invasive species which are increasing in number, as well as protect endemic species. Keywords: Abundance; beratan lake; community structure; plankton; saprobity
EVALUASI SISTEM DAN DAMPAK LINGKUNGAN PENGELOLAAN AIR TERPRODUKSI PADA SUMUR X1 PT MGBI LAPANGAN WUNUT Dhana J, Ida Bagus; Budiarsa Suyasa, I Wayan; Sara Wijana, I Made
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 18 No 1 (2024)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/EJES.2024.v18.i01.p02

Abstract

PT Minarak Gas Brantas Inc.'s operations in the Wunut Field involve the production of waste in various forms, primarily liquid waste, with produced water being the most significant type. Proper management of this produced water waste is crucial to prevent environmental pollution and ensure economic and environmental sustainability. The company manages this waste by reinjecting it into the reservoir to prevent groundwater contamination. To ensure the effectiveness of this reinjection process, they have created a groundwater flow pattern map (flow net) at three locations near the injection well: LP1 in Keduung Boto Village, LP2 in Candi Pari Village, and LP3 in Candi Pari Village, all in Sidoarjo Regency. This helps in understanding the potential spread of pollutants in the soil and underground water, aiding in environmental pollution monitoring and managment.The groundwater from this area is used for various human activities like bathing, cooking, and washing. However, based on water quality standards outlined in Ministry of Health Regulation No. 2 of 2023, the produced water from Well X-1 in the Wunut Field does not meet the required TDS (Total Dissolved Solids) content standards due to a decline in hydrocarbon fluid production, resulting in a separator efficiency of 74,86%. Additionally, lab tests and flow net results indicate that the TDS levels in LP1, LP2, and LP3 do not meet the sanitation and hygiene water quality standards, suggesting potential seepage in these locations that could contaminate groundwater. Keywords: Oil; Gas Produced Water; Gas Separator Eficiency; Groundwater Flow
Studi Kualitas Air, Status Mutu Air dan Beban Pencemaran Sungai Badung Bernard A.R Mendes; I Wayan Suarna; I Made Sara Wijana
JURNAL WILAYAH, KOTA DAN LINGKUNGAN BERKELANJUTAN Vol. 3 No. 2 (2024): JURNAL WILAYAH, KOTA DAN LINGKUNGAN BERKELANJUTAN
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/jwikal.v3i2.529

Abstract

This study aims to analyze the water quality of the Badung River based on Class II River water quality standards according to Government Regulation No. 22 of 2021, determine the water quality status, and calculate the potential pollution load of the Badung River. Water quality measurements were conducted at five sampling points. The parameters measured and observed include Temperature, Total Suspended Solids (TSS), pH, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Dissolved Oxygen (DO), Sulfate (SO42), Nitrate (NO3), Total Phosphate (P), Oil & Grease, Total Detergent, and Total Coliform. Samples were analyzed in the laboratory for physical, chemical, and microbiological parameters. The water quality status of the Badung River was determined using the pollution index method, and the potential pollution load was calculated using the wastewater emission coefficient approach. The results showed that the water quality and status of the Badung River are classified as lightly polluted, with an average pollution index value of 3.65. The potential pollution load entering the Badung River in the domestic sector is 0.78 tons/day for BOD, 1.07 tons/day for COD, and 0.74 tons/day for TSS. Factors contributing to the lightly polluted water quality status include population density, poorly managed domestic activities (household waste), which contribute to high pollution parameter values such as BOD, COD, and TSS, and a lack of waste management infrastructure
Co-Authors A.A.S. A. Sukmaningsih Abd. Rahman As-syakur Adi Ariyanto Wibisono Bernard A.R Mendes Bram Setyadji Dewa Ayu Intan Tirta Sari Dhana J, Ida Bagus Galih Anindita Kusumatjahja Gede Surya Indrawan Gussasta Levi Arnenda I Gusti Ayu Kunti Sri Panca Dewi I Gusti Ngurah Kade Mahardika I Ketut Junitha I Made Saka Wijaya I Made Yunarta I Putu Sugiana I W BUDIARSA SUYASA I Wayan Suarna Ida Ayu Putu Sugiantari Ida Bagus Gede Darmayasa Inna Narayani IRIANI SETYAWATI Khotima Dwi Cahya Komang Kartika Indi Swari Lalu Muhammad Sakti Surya Jagat M. Rheza Rizki Syahputra M. Sudiana Mahendra Made Ayu Pratiwi Ngurah Intan Wiratmini Ni Ketut Febri Antini Ni Made Ernawati, Ni Made Putu Angga Wiradana Retno Kawuri Suranjaya I .Gd Viryanando Evan Rahardja