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All Journal Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Jurnal Riset Biologi dan Aplikasinya
Raniah, Nadhifah
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Medicine & Pharmacology

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On the abundance and occurrence of the mangrove crabs, Scylla spp. (Crustacea: Portunidae) from Munjang mangrove, Bangka Belitung Island Raniah, Nadhifah; Henri, Henri; Kurniawan, Kurniawan
Jurnal Riset Biologi dan Aplikasinya Vol. 4 No. 2 (2022)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrba.v4n2.p75-82

Abstract

The mangrove ecosystem is one of the most productive ecosystems on earth. This ecosystem provides a lot of functions for the living organism inhabiting here, such as fishes, mollusks, echinoderms, crustaceans, ect. The mangrove crab is one of the common crustaceans that can be found in the mangrove. This Purtunidae crab is very popular due to their role in the food chain as well as for the economic income that has a high value in the market. However, overexploitation may decrease the crab population. This study aimed to investigate the abundance and occurrence of the mangrove crabs from Munjang mangrove, Bangka Belitung Island from August 2020 to June 2021 using baited traps with the line transect method at four zones. A total of four species of mangrove crabs, Scylla olivacea, S. paramamosain, S. serrata and S. tranquebarica, were found in this location and dominated by S. serrata. Shannon diversity index (H’) was a in low category (<1), evenness index range (J) from 0.35 to 0.89, and there was dominant species in this study. The bed sediment iswas dominated by the muddy clay substratum except in zone 4 with sandy. Overall, this location is a suitable habitat for the Scylla spp. And better management is urgently needed before these crabs are exploited by humans.
Estimasi Umur Padi pada Citra Sentinel-2 dengan Pendekatan Gaussian Mixture Model Ardiansyah, Muhammad; Raniah, Nadhifah; Munibah, Khursatul
Jurnal Ilmu Tanah dan Lingkungan Vol 26 No 1 (2024): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.26.1.21-28

Abstract

Pemantauan fase tumbuh atau umur tanaman padi dilakukan untuk memperkirakan luas panen dan produksi tanaman padi. Teknologi penginderaan jauh dapat melakukan pemantauan umur tanaman padi salah satunya menggunakan citra Sentinel-2. Penelitian ini bertujuan untuk mengidentifikasi umur tanaman padi, dan memetakann dan memantau sebaran spasio temporal umur padi dengan klasifikasi GMM pada citra multi-temporal Sentinel-2. Klasifikasi GMM merupakan salah satu metode yang sederhana dengan basis fungsi kepadatan. Penelitian dilakukan di lahan sawah Dinas Pertanian, Perkebunan, Pangan, dan Hortikultura Kabupaten Cianjur, Provinsi Jawa Barat dengan waktu pengamatan dari bulan Mei - Agustus 2021. Hasil penelitian menunjukkan bahwa respons spektral temporal berbeda antara kanal tampak mata (biru, hijau, dan merah) dan kanal inframerah dekat, dimana ke-3 kanal tampak mata memiliki pola yang serupa dengan nilai yang lebih rendah dari kanal inframerah dekat. Klasifikasi GMM dapat menunjukkan adanya kontinuitas kelas umur padi pada setiap akuisisi citra dari 0 - 130 hari setelah tanam, sehingga dapat digunakan untuk memantau umur atau fase tumbuh padi.
Co-Authors Henri Henri, Henri Khursatul Munibah Kurniawan Kurniawan Muhammad Ardiansyah