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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Torani Journal of Fisheries and Marine Science Phi : Jurnal Pendidikan Fisika dan Terapan Jurnal Ilmu Kelautan Spermonde Jurnal Akuatika Indonesia JURNAL ILMIAH GEOMATIKA
Muhammad Banda Selamat
Jurusan Ilmu Kelautan, Fakultas Ilmu Kelautan Dan Perikanan Universitas Hasannudin Jl.Perintis Kemerdekaan Km 10, Makassar 90245.
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Mathematics Physics Social Sciences Other

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SPATIAL COMPOSITION OF BENTHIC SUBSTRATE AROUND BONTOSUA ISLAND Selamat, Muhammad Banda; Lanuru, Mahatma; Muhiddin, Amir Hamzah
Jurnal Ilmu Kelautan SPERMONDE VOLUME 4 NUMBER 1, 2018
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jiks.v4i1.3801

Abstract

Coral reefs and seagrass are natural fortress for small islands from waves and ocean currents. The spatial distribution of these benthic substrate should be known and monitored regularly. This study aims were to map existing benthic substrates on the reef flat of Bontosua Island, determine the spatial composition and develop index ratio. Benthic substrates were surveyed using geotagging technique. Their distribution were estimate using Quickbird image that was rectified and classified using ISOcluster method and validate by 240 selected photos. The seagrass were surveyed at 8 stasions to record percent cover and species composition. Depth profiles were track along 10 reef flat line segment. Bontosua Island has an elongated shape from South to Northwest. This study had produced a benthic substrate distribution map with thematic accuracy 76%. Total area able to map were 54.2 hectares. About 43% benthic substrates at Bontosua were mixture of coral rubble, seagrass and algae, 20% was mixture of rubble and algae, 16% dominated by seagrass, 13% mixture of sand and seagrass and 8% substrate were dominated by live coral. There were eight seagrass species found with average percent cover 37.2 ± 12.5 percent. The spatial ratio of live coral, seagrass and mixed substrate for West side reef flat was 2:20:49 and 1:9:9 for East side. This indicate that the distribution of benthic substrates on the West side is much wider than on the East side. This approach potentially applied to study the relationship between benthic substrate composition and the deformation of small islands.
MAPPING MANGROVE GREEN BELTS IN AQUACULTURE PONDS USING GOOGLE EARTH ENGINE Selamat, Muhammad Banda; Supriadi, Supriadi; Muhiddin, Amir Hamzah; Rani, Chair
Jurnal Ilmu Kelautan SPERMONDE VOLUME 12 NOMOR 1, 2026
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35911/jiks.v12i1.50315

Abstract

Mangrove ecosystems function as vital biophysical buffers, attenuating wave energy, reducing coastal erosion, and stabilizing shorelines. Historically, they have been employed as natural barriers to protect coastal aquaculture, including fish ponds. This study examines the temporal dynamics of mangroves safeguarding the Unhas Bojo educational fish ponds using cloud-based geospatial analysis via Google Earth Engine (GEE). Field data were collected from June 2–5, 2023, across 27 sampling points within three stations, complemented by Sentinel-2A imagery (474 scenes, from 2016 to 2023). Equipment included GPS logger, quadrat, compass, ImageJ, timestamp camera, protractor, Google My Maps, GPX Viewer, QGIS, and GEE. Species identified were Rhizophora mucronata, Rhizophora apiculata, and Sonneratia alba. Average canopy cover was 76.2 ± 5.8%, indicating good ecological condition. NDVI values ranged from -0.12 to 0.65, with a model coefficient of determination (R²) of 0.835 and RMSE of 1.69. Despite overall resilience, seasonal NDVI dynamics revealed consistent patterns: higher productivity during the dry season and reduced values in the rainy season. These intra-annual fluctuations demonstrate that mangrove vigor is strongly coupled with climatic drivers, particularly rainfall intensity and hydrological regimes. Persistent canopy cover underscores ecological resilience, yet sensitivity to seasonal stressors highlights the importance of monitoring mangrove health under variable climatic conditions.
Co-Authors Aisjah Farhum Amir Hamzah Muhiddin Edwarsyah Edwarsyah Hestirianoto, Totok Ika Mustika Sari Indra Jaya Khairul Amri Khairul Amri Krisna Rendi Awalludin La Nafie, Yayu A. Mahatma Lanuru Marzuki Ukkas, Marzuki Medellu, Natania Carmenita Muhammad Rizqi Mukti Zainuddin Nabil Zurba Putri Faza Syahida Safruddin Safruddin Sarip Hidayat Supriadi - Supriadi Supriadi Taufikurrahman Taufikurrahman Vincentius P Siregar Zahran, Muhammad