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Bumi Lestari
Published by Universitas Udayana
ISSN : 14119668     EISSN : 25276158     DOI : https://doi.org/10.24843/blje
Core Subject : Humanities, Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Humanities Earth & Planetary Sciences Energy Environmental Science
Bumi Lestari Journal of Environment (p-ISSN: 1411-9668; e-ISSN: 2527-6158) is a peer-reviewed journal, presents original research articles and letters in all areas of environmental studies and environmental sciences (biotic, abiotic and social/cultural). This journal has been indexed by cabdirect cabi.org, AJD (Academic Journals Database), ISJD (Indonesian Scientific Journal Database), IndexCopernicus, Portal Garuda, researchBib and Google Scholar. The journal is published by Environmental Research Center (PPLH) of Udayana University. The journal is published two times a year: February and August in both printed and online versions. The online version is free access and download. This journal is devoted to publish research papers such as environmental biology, environmental physics, environmental health, ecology, geosciences and environmental chemistry including such matters as land, water, food, conservation, population, risk analysis, pollution, energy, economics of ecological and non-ecological approaches, social advocacy of arguments for change, analytical methods, legal measures, implications of urbanism, energy choices, waste disposal, health effects, recycling, transport systems, political approaches, social impacts and other issues of mass society. There is concern also for marginal areas, under-developed societies, minorities, species loss, etc. The purpose of this journal is to provide input and its solution to the environmental problems that has happened or will be happen from the results of researchs.
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Ilmu Lingkungan (Lain-Lain)
Articles 445 Documents
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KOMPOSISI JENIS DAN TUTUPAN TERUMBU KARANG DI PANTAI SAMUH, NUSA DUA, BALI Krisna Jumantara Panca Putra; I Wayan Arthana; Made Ayu Pratiwi
Bumi Lestari Journal of Environment Vol 22 No 1 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i01.p05

Abstract

Terumbu karang dikenal sebagai ekosistem yang sangat kompleks dan produktif dengan keanekaragaman biota seperti moluska, crustacea dan ikan karang. Keragaman hayati karang, fungsi ekologis dan ekonomis tinggi juga di ikuti oleh ancaman yang tinggi dai berbagai aktifitas manusia. Penelitian ini bertujuan untuk mengetahui komposisi jenis dan tutupan Terumbu karang. Penelitian menggunakan metode Purposive Random Sampling. Pengambilan data pada 2 stasiun dengan 3 kedalaman berbeda 3m, 7m, dan 10m dilakukan dengan menggunakan metode transek kuadran 1x1 m2. Penelitian menemukan 15 jenis Terumbu karang di Pantai Samuh meliputi Acropora Baranching (ACB), Acropora Encrusting (ACB), Acropora Submassive (ACS), Acropora Digitate (ACD), Acropora Tabulate (ACT), Non - Acropora Baranching (CB), Non – Acropora Encrusting (CE), Non – Acropora Foliose (CF), Non – Acropora Massive (CM), Non – Acropora Sub Massive (CS), Non – Acropora Mushroom (CMR), Non – Acropora Millepora (CME), Non – Acropora Helliopora (CHL), Soft Coral (SC), Sponge (SP), Zoanthida (ZO), Other (OT). Persentase tutupan Acropora lebih tinggi dibandingkan karang lainnya. Persentase tutupan Terumbu karang tertinggi terdapat di kedalaman 10 m sebanyak 94,75%, terendah di kedalaman 3 m sebanyak 80,66%. Berdasarkan hasil analisis diperoleh kondisi penutupan Terumbu karang di Peraian Pantai Samuh secara umum tergolong dalam kategori baik sekali dan terjaga.
Analisis Kelayakan Potensi Ekowisata Pantai Pandan, Kecamatan Pandan Tapanuli Tengah Sumatera Utara. Wenny Aberti Manurung; I Wayan Restu; Gde Raka Angga Kartika
Bumi Lestari Journal of Environment Vol 22 No 1 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i01.p01

Abstract

Abstract This study was conducted in Pandan Beach, Pandan District, Central Tapanuli, North Sumatra which aims to know the supporting factors of coastal tourism feasibility from the limiting factors of tourism conformity index value and to know the tourism conformity index (IKW). This research was conducted for 1 Month, namely in early March to early April 2021. The method used in this study is descriptive quantitative method. Determination of the location of research based on the representation of the area is located with the consideration that in the area is often carried out tourist activities such as point 1 waterspot activities, point 2 is swimming activity and point 3 ship activity that carries passengers around the island. parameters measured in the Index of Tourism Conformity Category Of Beach Tourism namely depth, tipe beach, beach width, water base material, beach slope, current speed, brightness, closure of coastal land, hazardous biota, and availability of fresh water. Based on the observation of the potential of Pandan Beach is the white sand, the waves are not too besar. The results showed the value of tourist conformity index of the three stations, namely at station 1 has a value of 2,695, while at stations II and III has the same value of 2,795. It shows that pandanus beach falls into the category of very appropriate (SI) with a conformity index value of >2.5. Hal showed that Pandan Beach Tapanuli Central North Sumatra has a very good potential to be a location for recreational beach tourism activities. Keywords: Potential; Tourism Conformity Index; Pandan Beach.
Pengaruh Pemberian Pakan Berbeda Pada Laju Pertumbuhan Ikan Lele Dumbo (Clarias gariepinus) I Putu Eka Mahendra; I Wayan Arthana; Ayu Putu Wiweka Krisna Dewi
Bumi Lestari Journal of Environment Vol 22 No 1 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i01.p02

Abstract

Aquaculture is one of the efforts made to increase fishery production at present and in the future. One type of freshwater aquaculture that is a leading commodity and is widely cultivated by the community is catfish. Different feeding effect on the growth of African catfish fry. This study used 3 different treatments, A feeding 100% silk worms, B feeding 100% maggot and the last C feeding 50% silk worms and 50% maggot.This study aims to determine the specific growth rate, feed conversion ratio (FCR) and Survival rate (SR) in catfish fry fed different feeds of silk worms and BSF maggots Based on the results of research for 30 days from March 2021 - April 2021, the specific growth rate got the highest results, namely in treatment A, namely feeding 100% silk worms and the lowest was in feeding treatment with 100% maggot BSF. According to the treatment given, the results of the growth rate obtained were treatment A of 4.52%, treatment B of 4.13%, treatment C of 4.39%. The lowest FCR results were found in the feeding of 100% silk worms and the highest in the treatment of feeding 100%. The results of the Feeding Conversion Ratio (FCR) or the feed conversion ratio obtained were treatment A which was 1.12, treatment B was 1.68, treatment C of 1.18. In the SR parameter, the highest results were obtained in treatment A, namely feeding 100% silk worms and the lowest in treatment B, namely feeding 100% maggot BSF. The results of the survival rate in this study were 79% in treatment A, treatment B 75%, treatment C 70%.
Analisis Kelayakan Finansial Wisata Air Terjun Kanto Lampo di Kabupaten Gianyar Wayan Putri Prakanti Karya; I Wayan Restu; Ni Putu Putri Wijayanti
Bumi Lestari Journal of Environment Vol 22 No 1 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i01.p03

Abstract

Gianyar Regency has interesting tourist objects, one of which is Kanto Lampo Waterfall, located in Banjar Kelod Kangin, Beng Village, Gianyar District, Gianyar Regency. The origin of the name Kanto Lampo is that there are many Kanto Lampo trees that grow around the river. Supporting infrastructure facilities currently available at Kanto Lampo Waterfall are the availability of a reception office, gazebo/bale bengong, toilets, changing rooms/rinsing rooms, payment counters, bathing pools, food vendors, and a fairly large parking area. The number of tourist visits to the Kanto Lampo Waterfall tourist attraction from 2015 was 10,170 people and continued to increase every year until 2019 as many as 51,810 people. The research on the financial feasibility analysis of Kanto Lampo Waterfall tourism aims to determine the economic feasibility of a waterfall development business based on an economic-financial approach. This research took place from January to February 2021. Primary data were obtained from interviews, direct observation, and documentation in the field. Based on the data obtained, the business of the Kanto Lampo Waterfall tourist attraction obtained an NPV value for 10 years of investment of IDR 1,137,263,458,-. The IRR value is 38%. The BCR value obtained is 3.8. and the value of the Payback Period (PP) of 1.3 years shows that the payback period for the waterfall business is relatively fast. Keywords: Analysis; Beng; Economics; Feasibility; Tourism
Pemanfaatan Ikan Red Devil (Amphilophus sp.) Sebagai Pakan Alternatif dalam Budidaya Ikan Nila (Oreochromis niloticus) I Kadek Mega Mega Dhyana Putra; Pande Gde Sasmita Julyantoro; Gde Raka Angga Kartika
Bumi Lestari Journal of Environment Vol 22 No 1 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i01.p04

Abstract

Penelitian ini bertujuan untuk mengetahui pertumbuhan dan tingkat kelulushidupan serta perbedaan rasio konversi pakan ikan nila yang diberikan pakan rucahan ikan red devil dengan persentase berbeda. Penelitian dilaksanakan pada kurun waktu 56 hari, menggunakan tiga perlakuan yakni A (kontrol) pemberian pakan 100% pelet, perlakuan B pemberian pakan rucah ikan red devil 100%, dan perlakuan C pemberian pakan pelet 50% + rucahan ikan 50%. Padat tebar ikan dalam penelitian ini adalah 20 ekor/50 liter air dengan ukuran ikan 4-6 cm yang diperoleh dari petani pendederan di daerah Bangli. Parameter yang diamati dalam penelitian ini adalah pengukuran panjang ikan, laju pertmbuhan spesifik, kelulushidupan, rasio konversi pakan dan kualitas air. Hasil dari penelitian yang telah dilaksanakan menunjukkan bahwa perlakuan C memberi hasil yang tertinggi dan berbeda nyata secara stastistik (P<0.05) pada pertumbuhan panjang mutlak dan kelangsungan hidup ikan. Hasil pengukuran parameter kualitas air selama penelitian menunjukkan suhu berkisar 23.80-24.18oC, nilai pH rata-rata 7.03 dan DO pada kisaran 5.82-6.13 mg/L. Nilai kualitas air ini masih berada dalam rentang optimum untuk pemeliharaan ikan nila. Kata Kunci: Ikan Nila; Ikan red devil; Laju Pertumbuhan
Keanekaragaman dan komposisi jenis plankton pada kolam bioflok ikan nila (Oreochromis niloticus) Ni Kadek Vindi Wedhawati; Pande Gde Sasmita Julyantoro; Dewa Ayu Angga Pebriani
Bumi Lestari Journal of Environment Vol 22 No 2 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i02.p02

Abstract

Aquaculture is an activity to cultivate aquatic biota in controlled media. One of the cultivated fish resources is tilapia (Oreochromis niloticus). Tilapia production continues to be increasing to meet increasing of consumer demand. The emergence of the problem of organic matter levels in the water could be harmful to both of fish and the environment. One of the solution to overcome this problem is by application of biofloc technology. The purpose of this study was to determine the diversity and composition of plankton species in tilapia biofloc ponds in Tiga Village, Susut District, Bangli Regency. This research was conducted in March-May 2021 in Tilapia Biofloc Pond. The research used a simple random sampling method. Sampling was carried out once in three biofloc ponds where each pond had 5 points. Data analysis is using the Microsoft Excel program. The data is present in the tables and charts consisting of the abundance, diversity, composition, dominance, and uniformity index of plankton. Based on the research results, it is known that there are 12 genus of phytoplankton and 4 genus of zooplankton. Phytoplankton diversity index values ??ranged from 1.31 to 1.65. Zooplankton diversity index values ranged from 0.79 to 1.08. The composition of phytoplankton species came from the genus Scenedesmus, Chlorella, Coelastrum, Chroococcus, Gonatozygon, Pediastrum, Nitzschia, Navicula, Synedra, Triceratium, Chaetoceros, and Pesudanabaena. The composition of zooplankton species comes from the genus Brachionus, Euchlanis, Tokophyra, and Vorticella. The water quality measured during the study was a temperature value ranging 25 oC, a pH value ranging from 7,12 – 7,18, a DO value ranging from 6.6 to 6.9 mg/L, an ammonia value ranging from 1.41 to 1.51 mg/L, and a nitrate value ranging from 1.84. -3.69 mg/L. This value is still in the optimal range for plankton life.
Identifikasi Morfologi pada Ikan Sidat (Anguilla spp) di Perairan Sungai Bali Selatan Letia Alda Fadilla; I Wayan Arthana; Ni Luh Ayu Gita Astriani; Gde Raka Angga Kartika
Bumi Lestari Journal of Environment Vol 22 No 2 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i02.p04

Abstract

Identification is necessary to identify the identity of an organism. Fish can be identified morphologically, namely by recognizing physical characteristics and looking for differences in the fish. This research was carried out for 3 months, from sampling, laboratory activities, and data analysis, starting from January 2021 to March 2021. Sampling was taken universally, samples were obtained from fishermen in the coastal waters of South Bali who caught eels. Laboratory activities are carried out at Fisheries Laboratory, Udayana University. This study used a descriptive analysis method. The sampling technique used in this study was probability sampling with simple random sampling. The stages carried out in this study were divided into two stages, including (1) sampling and (2) identification of morphological characters. The eel samples were obtained based on morphological identification of physical observation, eels are known to have a mottled pattern with slightly rounded oval tails and long fins. The morphometric measurements also obtained the results of the pre-dorsal length (PDL) ratio of 27.98%, the head length (HL) ratio of 14.14%, the ano-dorsal length (AD) ratio of 18.79%, and the ratio of pre-anal length (PAL) of 46.54%. The morphologically and morphometrically identified eel samples were identified as Anguilla marmorata.
Inventarisasi Dendrobium linearifolium Teijsm. & Binn. Dan Pohon Inangnya Di Kawasan Desa Lemukih, Buleleng - Bali Ni Made Gari; Junita Hardini; I Ketut Ginantra
Bumi Lestari Journal of Environment Vol 22 No 2 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i02.p05

Abstract

Dendrobium linearifolium Teijsm. & Binn. or "shrimp orchid" is one of the epiphytic orchids that is increasingly rare, therefore ex situ conservation is necessary. The success of ex situ orchid conservation requires knowing the types of its host trees. The study aimed to carry out an inventory of D. linearifolium and its host trees in the Lemukih Village Area, Buleleng – Bali. An explorative method was applied in the research. There were 63 individuals of D. linearifolium found in Lemukih Village. The highest number was present at an altitude of 500-700 meters above sea level (masl) (35), followed by those at 901-1200 m apl (22) and at 701-900 m apl (6) respectively. Meanwhile, 17 host trees were obtained which consisted of 10 species and eight families. Most D. linearifolium were found on Syzygium aqueum (Burm.f.) Alston (11), followed by those on Tamarindus indica L. (10), Helicia robusta (Roxb) R.Br. ex Blume (10) and Coffea canephora L. (7).
Kualitas Air, Kelimpahan Mikroba Dan Laju Pertumbuhan Udang Vannamei (Littopenaeus vannamei) Pada Tahap Pembesaran Menggunakan Sistem RAS dan Konvensional Putu Bagaskara; Pande Gde Sasmita Julyantoro; Alfi Hermawati Waskita Sari
Bumi Lestari Journal of Environment Vol 22 No 2 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i02.p03

Abstract

Vannamei shrimp (Littopenaeus vannamei) known as white shrimp is widely cultivated in Indonesia because it has high economic value. Conventional cultivation of vannamei shrimp is often represented by poor sewage treatment, where aquaculture waste is discharged directly causing a decrease in water quality in the environment. This study used 2 different cultivation systems, namely RAS (Recirculating Aquaculture System) and conventional systems (flow-through system). The research located at BPIUUK Karangasem, Bali. Water quality monitoring in each tank was carried out including ammonia, nitrite, TSS (Total Suspended Solid), and the abundance of microbes. Measurement of weight and length starts from the age of 30 days of shrimp with further checks every 7 days. A sampling of water quality, as well as measurements of weight and length, were carried out by random sampling method in each rearing tank. Based on the research data, the quality of aquaculture water using RAS and conventional system were not significantly different. The data on the abundance of microbes obtained in cultivation using RAS and conventional were also not significantly different, where RAS reaching 2.0 x 105 cfu/mL, while in conventional system was obtained 2.1 x 105 cfu/mL of total bacteria count. The growth rate with the average value of ADG (Average Daily Growth) in RAS is 0.88 g slightly higher compared to it is 0.80 g in conventional system. This study concluded that cultivation using RAS and conventional by flow-through system were not significantly different in terms of water quality, microbial abundance, and shrimp growth rate.
Kualitas Air, Pertumbuhan dan Kelulushidupan Benih Abalone (Haliotis squamata) dengan Aplikasi RAS di BPIUUK Karangasem Bali Arief Prayoga Akbar; Pande Gde Sasmita Julyantoro; Dewa Ayu Angga Pebriani
Bumi Lestari Journal of Environment Vol 22 No 2 (2022)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2022.v22.i02.p01

Abstract

Abalone is one of the sea snails that have high economic value and has advantages because it has a high protein content of 71.99%, a fat content of 3.24%, and can be used as medicine. The high demand for abalone causes the increase of wild capture and lead to scarcity of abalone in the waters. One way to overcome this problem is by cultivate the abalone. Abalone cultivation can be done with a monoculture system. One of the technologies applied is by using a recirculation aquaculture system (RAS), which is reprocessing the water used so that it can be reused for cultivation activities. The purpose of this study was to analyze the parameters of water quality, growth length, weight and survival of abalone (Haliotis squamata) seeds using the RAS system. The research was conducted in June – September 2020 at the Shrimp and Shellfish Parent Center, Karangasem, Bali. The research was performed by purposive sampling method. The water quality parameters data such as nitrite, ammonia, TSS pH, temperature, DO, and salinity were taken. The results of the measurement of water quality are nitrite 0 – 0.338 mg/L, ammonia 0 – 0.09 mg/L, TSS 0 – 15 mg/L, pH 7 – 8, temperature 26 – 28 oC, DO 4.3 – 7.07 mg/L, and salinity 31 – 38 ppt. Those values are still in the optimal range for abalone culture. The growth in length and absolute weight of abalone seeds during the study were 25.17 mm/ind. and 9.15 g/ind., respectively, and the survival value was 99.5% during the 100-day culture period.

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