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All Journal HAYATI Journal of Biosciences Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan AL KAUNIYAH AGRIVITA, Journal of Agricultural Science Jurnal Biodjati BIOEDUSCIENCE Marine Research in Indonesia Jurnal Kelautan Nasional Jurnal Ilmu Sosial dan Humaniora Makara Journal of Science LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI (LPMGB)
Dian Hendrayanti
Departemen Biologi, Gedung E, FMIPA Universitas Indonesia, Kampus UI Depok, Depok 16424
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology

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Dinamika Perubahan Komoditas Pertanian dan Implikasinya terhadap Kondisi Tanah di Desa Lantang Tallang, Kabupaten Luwu Utara Dian Hendrayanti; Nisrina Nur Azizah; Amanda Syahda; Anggun Rizka Amini; Yuni Riyanti
SOSMANIORA: Jurnal Ilmu Sosial dan Humaniora Vol. 5 No. 1 (2026): Maret 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/sosmaniora.v5i1.7445

Abstract

Land-use transformation is one of the major consequences of transmigration area development in Indonesia. Desa Lantang Tallang, Masamba District, North Luwu Regency, has experienced significant changes in its agricultural system since the arrival of transmigrants in 2013. This study aims to analyze the dynamics of agricultural commodity changes over the past decade and examine their implications for soil conditions and land management in plantation-based farming systems. The research employed a survey approach using field observations, semi-structured interviews, and secondary village data. Data were analyzed using descriptive-comparative methods and Location Quotient analysis to identify leading commodities. The results indicate a transition from food-crop-based farming toward plantation dominance, particularly oil palm, which shows the highest Location Quotient value. While this transition contributes to increased household income, it also intensifies the use of chemical fertilizers and dependence on external inputs, potentially leading to long-term soil degradation. These findings demonstrate that commodity transformation in transmigration areas simultaneously reshapes rural economic structures and generates socio-ecological consequences, highlighting the need for sustainable land management strategies.
A Modern Survey of Tetralunata (Rhopalodiales, Bacillariophyta) Species and Their Distribution in Lake Toba, Indonesia Ni Made Desi Swastiki; John Patrick Kociolek; Dian Hendrayanti
Al-Kauniyah: Jurnal Biologi Vol. 19 No. 2 (2026): AL-KAUNIYAH: JURNAL BIOLOGI
Publisher : Department of Biology, Faculty of Science and Technology, Syarif Hidayatullah State Islami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/kauniyah.v19i2.46515

Abstract

Tetralunata is a genus of canal-bearing raphid diatoms (ordo Rhopalodiales) with the unique feature of cyanobacterial symbionts. A species assigned to the genus was originally reported and described from Lake Toba by Brun in 1891, and several species described by Hustedt in 1935 and 1937 under the name Denticula Kützing (1844) have also been transferred to Tetralunata. According to Hustedt, 14 species now in Tetralunata were originally found alive or as fossil forms. Firstly, this study aimed to reconfirm the presence of Tetralunata in Lake Toba after its first description more than 130 years ago. The second purpose was to examine Tetralunata habitats in Lake Toba, which were not described by Hustedt in his 1935 and 1937 reports. Samples were collected from various sites around the lake and observed using light microscopy after cleaning with hydrogen peroxide (H₂O₂) and potassium dichromate (K₂Cr₂O₇). As a result, 9 species of Tetralunata were found: T. amphicephala, T. angusta, T. costata, T. elongata, T. lanceolata, T. obtusa, T. pelagica, T. cf. robusta, and T. vanheurckii, indicating Tetralunata biodiversity in Lake Toba. Six species previously reported by Hustedt were not found in this study, while four species that had been reported as fossil forms were found alive in this study.
Application of Biological Nitrogen Fixation Cyanobacteria To Paddy Plant Cultivated Under Deep-Water Culture System Dian Hendrayanti; Iman Rusmana; Dwi Andreas Santosa; Hamim Hamim
Jurnal Biodjati Vol 5 No 2 (2020): November
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/biodjati.v5i2.8510

Abstract

 The Biological Nitrogen Fixing (BNF) cyanobacteria can reduce atmospheric nitrogen into ammonium. This ability makes BNF cyanobacteria a potential eco-friendly N-source for soil-planted pad-dy. Apart from a few success stories of BNF cyanobacteria applica-tion in the rice field, its role as an ammonium producer is still an open question. There is also a possibility that indeed cyanobacteria biomass which provides nitrogen through the biological decomposing process. This study aimed to analyze the influence of three strains BNF cyanobacteria on paddy grown in the Deep-Water Culture (DWC) hydroponic system. Yoshida Nutrient Solution was used as a growth medium with the application of 0, 45.7, and 91.4 gL-1 of ammonium nitrate (NH4NO3) with five replications. The result showed that inter-action between cyanobacteria and nitrogen significantly influenced the total nitrogen of paddy plant, but not the paddy plant height, the num-ber of tillers, and biomass. Cyanobacterial filaments were found most-ly attached to the paddy root rather than floated in the DWC system. Paddy treated with cyanobacteria had more lateral root than control. The result suggested that cyanobacteria support paddy growth indi-rectly through nitrogen deposition in plant tissue and root development. 
PENGARUH BIKARBONAT TERHADAP PERTUMBUHAN MIKROALGA NANNOCHLOROPSIS SP. SEBAGAI SUMBER BIOMASSA BIOFUEL Onie Kristiawan; Zenitha Lintang Agustin; Dhiti Aliya Hanupurti; Rino Nirwawan; Dian Hendrayanti
Lembaran publikasi minyak dan gas bumi Vol 52 No 2 (2018)
Publisher : BBPMGB LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/LPMGB.52.2.349

Abstract

Mikroalga merupakan alga kecil (ukuran 2-20 μm) berupa tanaman talus yang memiliki klorofil sehingga mampu melakukan fotosintesis. Salah satu jenis mikroalga yang berpotensi untuk diambil minyaknya adalah Nannochloropsis sp. Nannochloropsis sp. merupakan sel berwarna kehijauan, tidak motil, dan tidak berflagela. Sebagian besar mikroalga menggunakan cahaya dan karbondioksida (CO2 ) sebagai sumber energi dan sumber karbon. Pada perairan CO2 terlarut biasanya dalam bentuk bikarbonat (HCO3 - ). Tujuan penelitian ini untuk mengetahui pengaruh peningkatan konsentrasi bikarbonat (HCO3 - ) terhadap peningkatan pertumbuhan mikroalga Nannochloropsis sp. Perlakuan yang diberikan kepada Nannochloropsis sp. adalah variasi bikarbonat, yaitu 25 ppm, 50 ppm, 100 ppm, dan 200 ppm dan dikultivasi selama 14 hari. Media pertumbuhan yang digunakan adalah Walne. Paramater yang diamati adalah pH, temperatur, Optical Density (OD), jumlah sel, biomassa dan lipid. Metode ekstraksi yang digunakana adalah maserasi dengan pelarut heksan:etanol (1:1). Hasil penelitian menunjukkan bahwa pertumbuhan mikroalga Nannochloropsis sp. berada pada kondisi optimum ketika menggunakan penambahan bikarbonat 200 ppm. Pada kondisi tersebut diperoleh jumlah sel tertinggi sebesar 22,72 x 106 sel/mL dengan laju pertumbuhan 0,0176 sel/jam dan biomassa sebesar 3,85 g/L. Kondisi pH kultur selama penelitian rata-rata berada pada pH 8 dan temperatur kultur berada pada rentang 25-28o C. Sedangkan untuk kadar lipid tertinggi berada pada konsentrasi bikarbonat 25 ppm dengan kadar lipid 20,236 % berat kering.
Co-Authors Agustin, Zenitha Lintang Amanda Syahda Amanina, Mardhotillah Asma Andi Salamah Anggi Septiani Anggun Rizka Amini Ariyani, Yuni Ariyani, Yuni Arya Widyawan Arya Widyawan Arya Widyawan, Arya Dhiti Aliya Hanupurti DWI ANDREAS SANTOSA Fadilah, Nurrahmi Feni Andriani Hamim Hamim Hanupurti, Dhiti Aliya Humaida, Milka Iman Rusmana John Patrick Kociolek Khoiriyah, Istatik KRISTIAWAN, ONIE Kusmadji, Lestari Rahayu Lestari Rahayu Kusmadji Mardhotillah Asma Amanina Ni Made Desi Swastiki Nining Betawati Prihantini Nirwawan, Rino Nisrina Nur Azizah ONIE KRISTIAWAN Pratiwi Yuliana Prihantini, Nining Betawati Prihantini, Nining Betawati Purbalisa, Wahyu Riani Widiarti Rianto, Ronny Rianto, Ronny Rino Nirwawan Ronny Rianto Sani, Lalu M. Iqbal Wahida Annisa Yusuf Wahyu Purbalisa Wardhana wardhana Wardhana, Wishnu Wisnu Wardhana Yasman Yasman Yuliana, Pratiwi Yuni Ariyani Yuni Riyanti Yusuf, Wahida Annisa Zenitha Lintang Agustin