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All Journal Journal of Marine and Aquatic Sciences Bumi Lestari Ecotrophic, Journal of Environmental Science BULETIN OSEANOGRAFI MARINA Jurnal Ilmu Lingkungan Journal of Marine Research Journal of Marine Research and Technology Jurnal Ilmiah Sains Jurnal Pengabdian Kepada Masyarakat Itekes Bali Journal of Fisheries & Marine Ulil Albab Advances in Tropical Biodiversity and Environmental Sciences
Gede Surya Indrawan
Program Studi Ilmu Kelautan, Fakultas Kelautan Dan Perikanan, Universitas Udayana, Badung-Bali
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Immunology & microbiology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

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Estimasi Kandungan Karbon Pada Sedimen di Hutan Mangrove Karangsewu, Bali Dzaki Adilla Razaan; Gede Surya Indrawan; I Dewa Nyoman Nurweda Putra
ULIL ALBAB : Jurnal Ilmiah Multidisiplin Vol. 3 No. 5: April 2024
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jim.v3i5.3277

Abstract

Ekosistem mangrove mampu mereduksi CO2 melalui mekanisme sekuestrasi, sehingga berperan penting dalam mitigasi perubahan iklim yang disebabkan oleh pemanasan global. Hutan mangrove di Karangsewu adalah bagian dari Taman Nasional Bali Barat (TNBB) yang merupakan kawasan pelestarian alam yang mempunyai fungsi sebagai habitat flora dan fauna, perlindungan bencana tsunami, serta tempat serapan karbon dalam mencegah pemanasan global. Tujuan penelitian ini yaitu untuk mengestimasi nilai kandungan karbon pada sedimen serta menganalisis variasi secara vertikal persentase karbon organik yang tersimpan dalam sedimen di hutan mangrove Karangsewu, Bali. Kandungan karbon dari sedimen hingga kedalaman 1 m dianalisis dengan metode LOI (loss on ignition). Estimasi nilai simpanan karbon sedimen mangrove di Karangsewu, Taman Nasional Bali Barat adalah sebesar 900,48 ton/ha. Nilai kandungan karbon organik terendah berada di zona paling depan pada kedalaman 0-25 cm yaitu bernilai 4,6%. Sedangkan, nilai tertinggi berada di zona paling belakang di kedalaman 75-100 cm dengan nilai 6,1%. Dari hasil yang diperoleh konsentrasi karbon organik akan semakin meningkat seiring bertambahnya kedalaman.
DNA Barcoding of Cardinalfish (Apogonidae) in Gilimanuk Bay, Bali, Indonesia Putra, I Nyoman Giri Putra; Indrawan, Gede Surya; Faiqoh, Elok
Jurnal Ilmiah Perikanan dan Kelautan Vol. 16 No. 1 (2024): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.vi.43336

Abstract

Abstract The Apogonidae is estimated to consist of nearly 300 fish species, most of which inhabit coral reef areas. The lack of distinctive body markings and overlapping species distribution makes species assignment challenging. Therefore, this study aimed to delineate species and establish barcoding reference databases of Apogonidae in Gilimanuk Bay (Bali, Indonesia) using the Cytochrome Oxidase I (COI) gene of the mitochondrial DNA. A total of 22 fish tissue samples were extracted with 10% Chelex solution. BLAST analysis was performed and genetic differentiation between species was calculated. The phylogenetic tree was constructed using the Maximum Likelihood method and tree visualization was generated using iTOL V5. The morphology and genetic identification results based on the mitochondrial COI gene revealed eight species of seven genera, and one species was new to GenBank online database. This study was the first-ever addition of COI sequence for Ostorhinchus hartzfeldii into the GenBank database. The average K2P genetic distance within species and K2P distance between genera within the family were 0.60% and 19.10%, respectively. The mean genetic distance between genera within the family was 31.8-fold higher than the mean genetic distance within species. The phylogenetic tree showed that each sample resided in a distinct cluster, which indicates that DNA barcoding is a reliable and effective approach for species delimitation in Apogonidae fishes. Highlight Research Eight species of cardinalfish in Gilimanuk Bay were delineated using the barcoding method. This study provides the first nucleotide sequence for Ostorhinchus hartzfeldii in GenBank online database. The phylogenetic tree showed that each sample resided in a distinct cluster, indicating that the barcoding method efficiently differentiated at the species level. The mean genetic distance between genera within the family was 31.8-fold higher than the mean genetic distance within species.
Analysis of Tourism Suitability and Carrying Capacity of Mangrove Areas in Sumberkima Village, Buleleng Regency, Bali Muhammad Fikri Deliansyah; Dwi Budi Wiyanto; Gede Surya Indrawan
Advances in Tropical Biodiversity and Environmental Sciences Vol. 9 No. 2 (2025): June 2025
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2025.v09.i02.p09

Abstract

The mangrove forests in Sumberkima Village, Buleleng Regency, Bali, hold significant potential for development as eco-friendly tourism destinations. This study aims to analyze the mangrove health index and the suitability of the mangrove area as an ecotourism destination, and to determine the area's carrying capacity for tourism activities. The methodology involves analyzing ecotourism parameters, including mangrove thickness and density, mangrove species, tidal patterns, and the presence of biotic objects. Primary data were collected through field observations, while secondary data were obtained from official sources. The study results indicate that the mangrove area in Sumberkima Village has a mangrove health index ranging from 34.89% to 51.18%, categorized as moderate. The mangrove tourism suitability index reveals that one observation station falls into the "suitable" category, with an index of 2.12, while the other two stations are classified as "not suitable." The carrying capacity for mangrove trekking activities is estimated at 223 visitors per day. This study concludes that the mangrove area in Sumberkima Village has potential for development as an ecotourism area. However, efforts to improve the quality of the mangrove ecosystem and tourism infrastructure are necessary to optimize the area's potential in a sustainable manner.
Korelasi Kesehatan Mangrove dengan Kelimpahan Gastropoda di Ekosistem Mangrove Desa Pejarakan, Bali Putu Gita Asmarani; Gede Surya Indrawan; Ni Made Ernawati
Journal of Marine Research Vol 14, No 3 (2025): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v14i3.45044

Abstract

Mangrove merupakan flora yang tumbuh di pesisir pantai dan dipengaruhi oleh pasang surut. Salah satu biota yang berasosiasi di ekosistem mangrove adalah gastropoda. Penelitian ini memiliki tujuan untuk mengetahui kondisi kesehatan mangrove, kelimpahan gastropoda, korelasi kesehatan mangrove dan kelimpahan gastropoda serta kondisi parameter lingkungan dan substrat. Metode penelitian yang digunakan adalah deskriptif kuantitatif yang menggambarkan atau menjelaskan fenomena yang sedang terjadi melalui pengumpulan dan analisis data numerik. Pengambilan dan analisis data dilakukan pada bulan Januari 2024. Data mangrove dan sampel gastropoda di ambil  di ekosistem mangrove Desa Pejarakan, Bali, sedangkan identifikasi gastropoda dan analisis data dilakukan di Laboratorium Ilmu Kelautan, Fakultas Kelautan dan Perikanan, Universitas Udayana. Pengumpulan data mangrove dilakukan dengan metode purposive sampling membuat plot berukuran 10x10m2, sedangkan untuk sampel gastropoda dikoleksi menggunakan subplot berukuran 1x1 meter2 di dalam plot mangrove. Stasiun pengambilan data berjumlah 3 dengan total 9 plot per stasiun. Hasil penelitian menunjukkan bahwa Indeks Kesehatan Mangrove di lokasi penelitian berkisar antara 30,83%-63,38% dengan kategori kesehatan buruk (poor) hingga sedang (Moderate). Jenis gastropoda yang ditemukan yaitu sebanyak 14 spesies dari 10 Famili yang didominansi oleh gastropoda yang berasal dari famili Potamididae yaitu spesies Terebralia sulcata dan Telescopium telescopium. Kesimpulan dari hasil yang didapatkan korelasi antara kesehatan mangrove dengan kelimpahan gastropoda menunjukkan hubungan positif dengan nilai koefisien (r) senilai  0,64 yang artinya adanya pengaruh kesehatan mangrove terhadap kelimpahan gastropoda pada suatu ekosistem. Kemudian, kondisi parameter perairan dan tipe substrat di lokasi penelitian ideal bagi kehidupan mangrove dan gastropoda.
Socio-economic Conditions and Welfare Levels of Lobster Fishers in Tabanan Regency, Bali Mochammad Rhasaan Habibie; I Ketut Wija Negara; Gede Surya Indrawan
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v10.i01.p07

Abstract

Lobster (Panulirus spp.) is a high-value commodity, making it a target for small-scale fishers in Tabanan Regency, Bali. Most of the poverty in Tabanan Regency is concentrated in coastal villages, where most residents work as fishers. This study aims to determine the socio-economic conditions and welfare levels of lobster fishers in Tabanan Regency, Bali measured in 10 welfare indicators according to the Central Bureau of Statistics (BPS) including income, proportion of expenditure, education, health, quality of housing, housing facilities, ownership status of housing, ownership of Information and Communication Technology (ICT) tools, ease of obtaining public facilities, and social access. This research is descriptive, quantitative, and qualitative, using questionnaire-based data collection techniques, and was conducted with 89 lobster fishers in August 2024 in Tabanan Regency, Bali. All respondents answered the same questions using a value scale of 1 to 3. The score values were totaled and averaged to produce three categories: prosperous, moderate, and not prosperous. This study shows that the socioeconomic conditions of lobster fishers in Tabanan Regency are generally good. Among 89 respondents in Tabanan Regency, Bali, 93% are in the 2.42-3.12 range, indicating the prosperous category, and the remaining 7% are in the 1.71-2.41 range, indicating the moderate category. There are no fishers classified as not prosperous.
Kondisi Makrozoobentos Kaitannya dengan Ekosistem Mangrove di Kawasan Mangrove Estuari Perancak, Jembrana, Bali Sindi Krisanti Purba; Gede Surya Indrawan; Yulianto Suteja
Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v14i1.64699

Abstract

Ekosistem mangrove memainkan peran penting dalam mendukung kehidupan akuatik, sebagai sumber makanan, tempat pembesaran dan tempat pemijahan bagi berbagai organisme akuatik. Kondisi lingkungan mangrove sangat memengaruhi keberadaan biota perairan, terutama makrozoobentos. Penelitian ini dilakukan untuk mengetahui kelimpahan makrozoobentos, kondisi kerapatan mangrove, serta hubungan parameter lingkungan dan kerapatan mangrove dengan kelimpahan makrozoobentos menggunakan pendekatan Principal Component Analysis (PCA). Penelitian ini dilakukan pada bulan Oktober 2023 di ekosistem mangrove Perancak, Jembrana, Bali dengan pengambilan sampel di tiga jenis habitat mangrove: mangrove alami, restorasi, dan campuran. Data mangrove dikumpulkan menggunakan transek berukuran 10x10m2, adapun pengambilan data makrozoobentos menggunakan transek 1x1m2.. Hasil pengukuran kualitas air menunjukkan suhu berkisar antara 28,67-30,87OC, pH 6,25-6,45, salinitas 27,78-30,89‰, oksigen terlarut 2,15-2,81 mg/L dan kadar nitrat 0,49-0,97 mg/L. Nilai tersebut menunjukkan bahwa kondisi kualitas air pada lokasi penelitian dalam kondisi baik dan mendukung pertumbuhan makrozoobentos. Selain itu, tekstur sedimen didominasi oleh substrat lempung liat berdebu. Makrozoobentos yang ditemukan terdiri dari 15 spesies dari 10 famili dan 3 kelas yaitu Gastropoda, Polychaeta, dan Malacostraca. Kelimpahan makrozoobentos berkisar antara 12,87-16,3ind/m2, sedangkan kerapatan mangrove berada pada kategori sangat padat dengan nilai antara 2300-3566 ind/ha. Indeks keanekaragaman 1,52-2,31, indeks keseragaman 0,78-0,9, dan indeks dominansi 0,12-0,29. Nilai indeks ekologi ini menunjukkan bahwa makrozoobentos berada dalam kondisi seimbang. Berdasarkan hasil analisis PCA, kelimpahan memiliki korelasi positif dengan variabel kerapatan mangrove, suhu, oksigen terlarut (DO), dan pH. 
Co-Authors Abd. Rahman As-syakur Adi Ariyanto Wibisono Adiana, I Nengah Anisa Setyawati Atmaja, Putu Satya Pratama Bertha Ayu Andhira Deny Suhermawan Yusup Devi Ulinuha Dewa Ayu Intan Tirta Sari Dwi Budi Wiyanto Dzaki Adilla Razaan Elok Faiqoh Harifah, Zahwa Aulia Nurul I Dewa Nym. Nurweda P., I Gede Andika Wijantara I Gede Hendrawan I Gede Mita Anjas Swara I Gusti Ngurah Putra Dirgayusa I Ketut Wija Negara I Komang Agus Parnata I Made Saka Wijaya I Made Sara Wijana I Made Sara Wijana I Made Yunarta I Putu Aditya Budi Wacika I Putu Sugiana I Putu Yogi Darmendra I Wayan Arthana I Wayan Arthana I Wayan Eka Dharmawan I Wayan Gede Astawa Karang I Wayan Nuarsa Ida Ayu Manik Damayanti Ida Bagus Putu Adi Gita Saputra Idam Bali Haryono Komang Kartika Indi Swari Luh Putu Diah Ananda Wijayanti M. Rheza Rizki Syahputra Mochammad Rhasaan Habibie Muhammad Fikri Deliansyah Muhammad Imran Zaelani Nadya Treesna Wulansari Ni Made Ernawati, Ni Made Ni Wayan Sukma Antari Padmiswari, A.A. Istri Mas Pande Ketut Cahya Krisnanta Arioka Pande Komang Egar Prihandana Putra, I Nyoman Giri Putra, I Nyoman Giri Putra Putu Angga Wiradana Putu Gita Asmarani Rahardja, Viryanando Evan Rijal Rahmatullah Sidik, Awalul Rizal Rohman Sindi Krisanti Purba Sugiana, I Putu Sutrisna, Putu Gede Viryanando Evan Rahardja Wibisono, Adi Ariyanto Wicaksana, IGA Tresna Wijaya, I Made Saka Yulianto Suteja