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All Journal Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Abdimas Serawai Edubiotik : Jurnal Pendidikan, Biologi dan Terapan
Jarulis
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The Habitat Suitability Modelling of Rhinoceros Hornbills (Buceros rhinoceros) in Java Island, Indonesia Setiawan, Taufik; Prasetyo, Lilik Budi; Mulyani, Yeni A.; Jarulis
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 14 No 2 (2024): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.14.2.253

Abstract

Rhinoceros hornbills (Buceros rhinoceros) are a bird species belonging to the Bucerotidae family, which is vulnerable based on the IUCN red list of species. This is due to habitat fragmentation, which reduced the Rhinoceros hornbill habitat on Java. Efforts and strategies are needed to maintain Rhinoceros hornbill habitats. Information on the suitability of the Rhinoceros hornbill habitat on Java Island is required to develop a Rhinoceros hornbill conservation strategy. This study aimed to determine a habitat suitability model that produces the highest accuracy, analyze hornbill habitat suitability, and identify environmental variables that affect the existence of rhinoceros hornbills. Habitat suitability models were processed using three algorithms: random forest, support vector regression, and MaxEnt. The data used to model habitat suitability were presence and environmental variables. The model was evaluated using various accuracy measures, namely overall accuracy, sensitivity (sn), specificity (sp), Area Under Curve (AUC), and kappa coefficient. The resultsof model processing showed that the random forest algorithm produced the highest average accuracy of 0.74. The most important environmental variables for the habitat suitability model were the distance from the road (16.62%), distance from the forest (12.73%), and land cover (12.47%). The habitat suitability model was divided into three classes: low suitability, covering 75,048 km2 (55.94%); medium suitability, covering 52,911 km2 (39.44%); and high suitability, covering 6,213 km2 (4.63%). The results of the habitat suitability model showed that the habitat suitability class was the smallest in the area.
Pengenalan Berbagai Teknik Pembuatan Kompos di Sekolah Madrasah Aliyah Negeri (MAN) 1 Kota Bengkulu Darmi; Jarulis; Rizwar; Yulian Fauzi
JURNAL ABDIMAS SERAWAI Vol. 5 No. 3 (2025): Jurnal Abdimas Serawai (JAMS)
Publisher : Program Studi Administrasi Fakultas Ilmu Sosial dan Ilmu Politik Universitas Muhammadiyah Bengkulu 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36085/jams.v5i3.9317

Abstract

Abstrak:Permasalahan sampah organik di lingkungan sekolah seringkali belum tertangani secara optimal, padahal memiliki potensi besar untuk diolah menjadi pupuk organik yang bermanfaat. Kegiatan pengabdian masyarakat ini bertujuan untuk memperkenalkan berbagai teknik pembuatan kompos kepada siswa dan guru di Madrasah Aliyah Negeri (MAN) 1 Kota Bengkulu sebagai upaya peningkatan pengetahuan, keterampilan, dan kepedulian terhadap pengelolaan sampah organik. Kegiatan dilaksanakan pada tanggal 16 Desember 2022 di Aula MAN 1 Kota Bengkulu dengan melibatkan tiga dosen dan dua mahasiswa dari Universitas Bengkulu sebagai tim pelaksana. Metode kegiatan meliputi penyuluhan interaktif dan demonstrasi langsung pembuatan kompos menggunakan metode windrow. Evaluasi dilakukan melalui observasi terhadap partisipasi, antusiasme, serta kualitas pertanyaan yang diajukan oleh peserta selama kegiatan berlangsung. Hasil menunjukkan bahwa peserta, baik siswa maupun guru, menunjukkan minat yang tinggi dan pemahaman yang meningkat terhadap proses pengomposan, termasuk pemanfaatan bahan organik lokal dan pembuatan larutan mikroba alami sebagai pengganti EM4. Kegiatan ini berhasil meningkatkan literasi ekologi, kreativitas, dan keterampilan teknis peserta dalam mengolah limbah organik menjadi kompos. Selain itu, kegiatan ini turut mendukung visi sekolah untuk mewujudkan lingkungan yang bersih, hijau, dan berkelanjutan melalui penerapan konsep green school.
Heavy metal accumulation and histopathology of fish muscle from contaminated rivers Helmiyetti; Lestari, Dian Fita; Jarulis; Turnando , Hengki; Wulan, Farisa Retno; Risditama , Ibranio
Edubiotik : Jurnal Pendidikan, Biologi dan Terapan Vol. 11 No. 01 (2026): May
Publisher : Biology Education Department, Universitas Insan Budi Utomo, Malang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33503/ebio.v11i01.2137

Abstract

Gold mining activities in Lebong release heavy metals into aquatic ecosystems, where fish act as bioindicators due to their ability to bioaccumulate pollutants. This study evaluated mercury and cadmium contamination in fish and examined histopathological responses in fish muscle. This research employed a descriptive quantitative approach. Water and fish samples were collected from the four rivers surrounding gold mining areas: Air Putih, Amen, Air Kotok, and Tambang Saweak rivers in Lebong Regency, Bengkulu Province, Indonesia. Heavy metals were analyzed using atomic absorption spectrophotometry, while histopathological examination was conducted microscopically. Data were analyzed descriptively and statistically. The results revealed that mercury and cadmium were detected in both water and fish. Mercury in the Amen River reached 0.14 mg/L, exceeding the permissible water quality standard, while cadmium remained below threshold limits. The highest mercury was recorded in Rasbora sp. (1.21 mg/kg), exceeding the maximum limit of 0.5 mg/kg, and the highest cadmium in T. trichopterus (3.54 mg/kg), substantially exceeding the permissible limit of 0.1 mg/kg. Histopathological examination of Rasbora sp., O. niloticus, H. nemurus, M. circumcinctus, and T. trichopterus, demonstrated muscle atrophy, edema, necrosis, fragmentation, splitted element, and degeneration. These findings indicate significant bioaccumulation of heavy metals and suggest potential risks to aquatic organisms and human health through fish consumption.
Co-Authors Darmi Helmiyetti Lestari, Dian Fita LILIK BUDIPRASETYO Risditama , Ibranio Rizwar Taufik Setiawan Turnando , Hengki Wulan, Farisa Retno Yeni A. Mulyani Yulian Fauzi