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A Study on Characteristics of Semi-Natural Hatchery Habitat for Olive Ridley Sea Turtle Lepidochelys olivacea (Eschscholtz, 1829) Conservation: A Case Study of Batu Hiu Beach, Pangandaran, West Java, Indonesia Faddilah, Thallita Nasywa; Hasan, Zahidah; Arief, Mochamad Candra Wirawan; Herawati, Titin
Journal Omni-Akuatika Vol 20, No 2 (2024): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2024.20.2.1146

Abstract

Sea turtle populations have declined due to habitat destruction and the widespread collection of eggs for commercial purposes. This study assessed the characteristics and suitability of semi-natural hatchery habitats for Olive Ridley Sea Turtles (Lepidochelys olivacea) at Batu Hiu Beach, Pangandaran, West Java, Indonesia, from June 1-July 31, 2023. The survey method and purposive sampling were employed to determine nesting sites based on turtle landing points.Biophysical habitat measurements were analyzed descriptively and statistically using one-way ANOVA and Tukey's post hoc test to compare sand temperature, sand humidity, and air humidity. An L. olivacea landed at site 4, laying 73 eggs in a natural nest with 34 cm nest depth and 24 cm nest diameter. Semi-natural nests measured 37 cm nest depth and 26 cm in nest diameter. The sand type at Batu Hiu Beach was characterized by black sand grains and fine sand substrate with a percentage of 51.02%. The temperature within the hatchery ranged from 25.3°C to 42.1°C.  with average of 29.7 ± 1.88 °C.The sand humidity in the hatchery ranged from 2% to 14%, with an average daily humidity of 10 ± 0.22 %. The air humidity within the hatchery ranged from 56% to 94%, with a daily average of 85 ± 0.05 %. Based on all the analyzed parameters, the hatchery at Batu Hiu Sea Turtle Preservation were suitable with the nest criteria by Technical Guidelines for Sea Turtle Conservation Management by DKP for the hatching of L. olivacea eggs, with a hatching success rate of 85%.Keywords: Lepidochelys olivacea, temperature, humidity, sand type, hatching success
Sebaran Makroplastik di Kawasan Ekowisata Mangrove Karangsong Indramayu Jawa Barat Wijdanisa, Rahma; Arief, Mochamad Candra Wirawan; Nurruhwati, Isni; Ismail, Mochamad Rudyansyah
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.v14i1.67297

Abstract

Sampah plastik banyak dijumpai di berbagai wilayah pesisir, terbawa oleh gelombang arus dan pasang surut, serta kontribusi aktivitas daratan melalui sungai yang bermuara di laut. Ekosistem pesisir yang saat ini mengalami dampak peningkatan sampah plastik antara lain terumbu karang, padang lamun, pantai dan ekosistem mangrove. Ekosistem mangrove menjadi wilayah dengan ancaman akumulasi sampah makroplastik dengan jumlah sangat banyak dari berbagai aktivitas. Kawasan mangrove Karangsong di Kabupaten Indramayu merupakan ekosistem mangrove yang memiliki fungsi dan dikelola sebagai kawasan ekowisata. Riset ini bertujuan untuk mengetahui komposisi jenis dan kepadatan makroplastik di kawasan ekowisata Mangrove Karangsong. Penelitian menggunakan metode survei dengan plot transek 10 x 10 m2 secara stratified random sampling. Hasil penelitian ini menunjukkan makroplastik terbanyak merupakan jenis Polyethylene Terephthalate (PETE) sebesar 33,47% dengan kepadatan 5,43 potong/m2, sementara makroplastik paling sedikit dijumpai pada jenis Polyvinyl Chloride (PVC) sebesar 0,15% dengan kepadatan 0,01 potong/m2. Sebaran sampah makroplastik yang ditemukan umumnya terkumpul tersangkut pada sistem perakaran mangrove dan tertutup substrat sedimen. Jenis makroplastik yang ditemukan, mengindikasikan pentingnya pengelolaan sampah di kawasan ekowisata maupun dari sumber utama penghasil. 
Inventory of Slums with Remote Sensing Methodology as A Step to Educate A Sustainable City (Case Study of Mapping Slums in The City of Bandung) Sijabat, Krisna Ramita; Dharmawan, Irwan Ary; Arief, Mochamad Candra Wirawan
Eduvest - Journal of Universal Studies Vol. 5 No. 5 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i5.51177

Abstract

Urban slums remain a significant challenge in Indonesia, exacerbated by rapid population growth and inadequate local government intervention. Remote sensing technologies offer high accuracy in mapping these areas, yet a lack of community engagement and knowledge hinders their effective application. This study aims to explore the integration of remote sensing applications with community engagement strategies to enhance urban planning and development in densely populated slum areas. The research employs case studies across various urban areas in Indonesia, complemented by participatory workshops with community members and local officials to gather insights and develop a participatory framework. The study identifies barriers to stakeholder engagement and highlights the potential of combining remote sensing data with local knowledge to create actionable urban development plans. The findings contribute to sustainable urban development discourse by providing guidelines for local governments on leveraging remote sensing data while actively involving communities, ultimately improving urban planning outcomes in Indonesia.
ESTIMATION OF CARBON STORAGE POTENTIAL IN THE MANGROVE FOREST REHABILITATION AREA IN SEBELE VILLAGE, RIAU ISLANDS Lestari, Indri; Arief, Mochamad Candra Wirawan; Mulyani, Yeni; Ismail, Mochamad Rudyansyah; Widyasthana, Ferdiansyah Naufal
Jurnal Perikanan Unram Vol 15 No 4 (2025): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v15i4.1707

Abstract

Global warming is a phenomenon of increasing the average temperature of the earth's surface. Carbon can be stored in various forms in ecosystems, one of which is the concept of blue carbon. This research aims to analyze the condition of the mangrove ecosystem and the potential for carbon storage in the mangrove forest rehabilitation area in Sebele Village, Karimun Regency, Riau Islands. This research was conducted from October 2024 to July 2025 in the mangrove forest rehabilitation area of Sebele Village, Riau Islands Province. The method used in this research is the survey method. Standing biomass data was obtained using allometric equations. The research results show that the level of tree density in the mangrove forest rehabilitation area of Sebele Village is in the Sparse category. At the tree level, it is dominated by the Xylocarpus granatum species, while at the sapling level it is dominated by the Rhizophora mucronataspecies. The highest carbon storage value is found in the Avicennia marina species with a carbon storage value of 14.44 tons/ha. And the potential carbon storage from the calculation results obtained a carbon storage value of 61.43 tons/ha. The carbon storage value is directly proportional to the standing biomass. The greater the standing biomass, the greater the carbon stored.
Pemahaman Masyarakat Terhadap Konservasi Ikan Dewa di Desa Darma, Kabupaten Kuningan Fortuna, Friyona Dewi; Gumilar, Iwang; Sahidin, Asep; Arief, Mochamad Candra Wirawan
Farmers : Journal of Community Services Vol 6, No 2 (2025): Farmers: Journal of Community Services
Publisher : Unpad Press

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kearifan lokal merupakan faktor penting dalam menjaga keberlangsungan ekosistem. Masyarakat memiliki peran utama dalam upaya konservasi berbasis nilai-nilai kearifan lokal yang meliputi pengetahuan dan kepercayaan lokal yang diturunkan turun-temurun secara lisan. Pengetahuan dan kepercayaan lokal masyarakat berpotensi luput dari masyarakat seiring berjalannya waktu karena semakin berkembangnya zaman masyarakat mulai menghiraukan hal-hal yang berbau mistis. Maka studi ini dilakukan untuk mengetahui pengaruh pendidikan dan usia terhadap pengetahuan dan kepercayaan lokal masyarakat terhadap ikan dewa. Hasil studi menunjukan tingkat pendidikan dan usia masyarakat tidak berpengaruh secara signifikan terhadap pengetahuan masyarakat. Namun tingkat kepercayaan masyarakat pada tingkat pendidikan sarjana menunjukan persentase terendah (75%) sedangkan berdasarkan kelompok usia seluruhnya memiliki persentase yang sama (100%). Berdasarkan hasil studi, perlu dilakukan penyuluhan khususnya mengenai pemahaman masyarakat terkait ikan dewa dan habitatnya untuk mengiringi kepercayaan terhadap mitos yang melekat pada masyarakat.
Cadmium (Cd) Contamination Status in Cisanti Lake (West Java, Indonesia) Analysis on Water, Sediment, and Bioaccumulation in Invasive Mussels Sinanodonta pacifica (Heude, 1878) Manuel, David Reivaldo; Sahidin, Asep; Hasan, Zahidah; Herawati, Heti; Baihaqi, Faqih; Arief, Mochamad Candra Wirawan
HAYATI Journal of Biosciences Vol. 32 No. 6 (2025): November 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.6.1476-1484

Abstract

Cisanti Lake, the strategic zero point of the Citarum River, faces the threat of cadmium (Cd) pollution from surrounding agricultural activities. Conducted during the dry season of 2024, this pioneering study assesses the Cd pollution status using a multicompartment approach (water, sediment, and bioindicator organism Sinanodonta pacifica, Heude 1878). Samples from the three stations were analyzed using Atomic Absorption Spectrophotometry (AAS). The concentration of Cd in water was very low (0.0012–0.0030 mg/L), but it accumulated significantly in sediment (0.37–0.65 mg/kg) and mussel tissue (0.20–0.30 mg/kg). Although the concentration in water and biota was below quality standards, ecological risk analysis revealed that the sediment has moderate contamination (Contamination Factor: 1.25–2.15) and acts as a long-term pollutant sink. S. pacifica proved effective in accumulating Cd from the water column, demonstrated by a high Bioconcentration Factor from water to biota (BCF b-w >75), making it a reliable bioindicator of Cd pollution. This study provides crucial baseline data on environmental management in the upstream Citarum and establishes sediment monitoring as a vital early warning tool for future pollution risks.
Post-Rehabilitation Dynamics of Mangrove Vegetation in Tarakan, North Kalimantan Wiharyanto, Dhimas; Ilman, Muhamad; Salim, Gazali; Hidayat, Wahyu; Ransangan, Julian; Arief, Mochamad Candra Wirawan; Zahidah, Zahidah; Rahman, Abdur; Mujiyanto, Mujiyanto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 3 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.3.345-358

Abstract

This research examined the post-rehabilitation dynamics of the mangrove ecosystem in the Mangrove and Crab Conservation Area, Tarakan, North Kalimantan, four years after the launch of a community-based restoration program in 2019. The objectives were to evaluate species composition, vegetation structure, and the survival of mangrove seedlings within rehabilitated plots. The sampling was done on purpose in areas that show the main ecological features of the site. This study found five types of mangrove trees: Avicennia alba, Rhizophora mucronata, Avicennia marina, Sonneratia alba, and Xylocarpus granatum. It is fewer than the ten species that were there in the past. Among these, Avicennia alba consistently dominated both the mature and seedling stages, recording the highest relative density (72.56%), frequency (42.86%), and canopy cover (78.08%). Its naturally regenerating seedlings reached a survival rate of 52%, substantially higher than the 17% recorded for planted Rhizophora mucronata. The Avicennia alba is particularly well adapted to the prevailing site conditions, mainly owing to its tolerance of sediment disturbance and variable salinity. This outcome highlights the importance of Assisted Natural Regeneration (ANR) that employs locally adapted species, offering a more practical, cost-effective, and sustainable approach than conventional planting methods. Although there have been some improvements, the decrease in species numbers shows the ecosystem is still in the early stages of recovery. To make sure it stays healthy and strong for the future, it is important to keep the water flowing properly, reduce human impact, and keep up with regular checks and monitoring.
ANALYSIS OF VEGETATION STRUCTURE IN THE MANGROVE ECOSYSTEM OF PENGARENGAN, PANGENAN, CIREBON REGENCY Lutfianti Mutmainah, Annisa; Arief, Mochamad Candra Wirawan; Lewaru, Muhammad Wahyudin; Sunarto, Sunarto; Arifin, Intan Khairunissa; Yasmin, Putri Auliya
Jurnal Perikanan Unram Vol 15 No 5 (2025): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v15i5.1872

Abstract

Mangrove ecosystems play an important role in maintaining coastal biological balance, protecting land from erosion, providing habitats for various biota, and functioning as effective carbon sinks. Indonesia has the largest mangrove area in the world, covering approximately 3.3 million hectares, but this ecosystem continues to experience degradation due to land conversion, with a rate of destruction reaching 530,000 hectares per year. This degradation reduces the ecological and economic functions of mangroves, necessitating vegetation structure analysis to assess the condition of the ecosystem. This study aims to analyze the vegetation structure of mangroves in Pengarengan Village, Pangenan District, Cirebon Regency, which is one of the oldest mangrove areas in Cirebon. Data collection was carried out at three stations using the Transect Line Plot method with plot sizes of 10×10 m² for trees, 5×5 m² for stakes, and 1×1 m² for seedlings. The parameters observed included density, frequency, and dominance, which were then used to calculate the Importance Value Index (IVI). The results showed that the mangrove vegetation at the study site was dominated by the species Rhizophora mucronata and Avicennia marina. The density of tree-level vegetation was classified as moderate to dense, with the highest density found at Station II (2,433 ind/ha) and the lowest density found at Station I (1,200 ind/ha). The INP value reached 300% for each species at all stations at the tree and stump levels, indicating the dominance of one species at each station