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All Journal HAYATI Journal of Biosciences Jurnal Silvikultur Tropika (JST) MEDIA KONSERVASI Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Penelitian Pengelolaan Daerah Aliran Sungai Jurnal Silva Tropika Jurnal Pusat Inovasi Masyarakat Jurnal Sylva Lestari JURNAL HUTAN TROPIS
Adisti Permatasari Putri Hartoyo
Department Of Silviculture, Faculty Of Forestry And Environment - IPB University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology Social Sciences

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Monitoring Forest Cover Change and Encroachment Risk Mapping Using the Normalized Difference Fraction Index (NDFI): A Case Study of Gunung HalimunSalak National Park, Indonesia Ahmad Fahrur Rizqi; Hartoyo, Adisti Permatasari Putri; Mursalina Nur Buana; Novia Damayanti; David Anderson Lubis; Yurico Bakhri
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 15 No 6 (2025): 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.15.6.1060

Abstract

Gunung Halimun Salak National Park (GHSNP) is one of the most biodiversity-rich protected areas in Java, yet it remains highly vulnerable to deforestation and forest degradation. This study examines forest cover dynamics from 1994 to 2024 and projects village-level encroachment risk for 2034. Landsat 5 TM, Landsat 7 ETM+, and Landsat 8–9 OLI imagery were processed in Google Earth Engine to generate the Normalized Difference Fraction Index (NDFI) using spectral mixture analysis of GV, NPV, soil, and shade fractions. Changes in NDFI (ΔNDFI) were used to classify degradation, deforestation, regrowth, and intact forest. Encroachment risk mapping was modeled using a 3 × 3 kernel neighborhood with two analytical approaches: the sum of risk weight and the majority of risks around. Forest cover declined by 19,424 ha between 1994 and 2004, largely driven by illegal encroachment linked to governance uncertainty in 2003. An increase of 6,678 ha during 2004–2014 reflects the impact of restoration initiatives and strengthened area protection, although a subsequent decline of 1,992 ha occurred between 2014 and 2024 due to renewed encroachment. Model evaluation indicates low predictive performance for both kernel methods (Precision 4%). Despite this limitation, areas of elevated risk consistently appeared along forest edges near settlements and footpath access routes. Citorek Kidul was identified as the village most susceptible to encroachment in 2034. Improving the accuracy of encroachment prediction will require the integration of socio-economic drivers and advanced machine-learning approaches capable of capturing the complex and non-linear patterns of forest encroachment. 
Peningkatan Pengetahuan Kelompok Tani melalui Pelatihan Budi Daya Porang di Desa Sugihwaras, Magetan, Jawa Timur Istomo, Istomo; Rahaju, Sri; Hartoyo, Adisti Permatasari Putri
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 9 No. 1 (2023): Agrokreatif Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.9.1.1-9

Abstract

The Subur farmer group is located in Sugihwaras Village, Maospati District, Magetan Regency, East Java which develops sugarcane (Saccharum officinarum) and teak (Tectona grandis) with a monoculture pattern. Monoculture cultivations produce a single income for farmers, hence other adaptive intolerant commodities and sites that generate alternative income are needed. One of them is Porang (Amorphophallus muelleri Blume). The farmer group’s knowledge and skills related to porang cultivation are very limited. The aims of this activity were: 1) To train farmer groups related to porang cultivation planted with agroforestry patterns; 2) To analyze knowledge changes of farmer groups regarding porang cultivation; and 3) To evaluate the implementation of the training program. The results showed that training on porang cultivation and making agroforestry demonstration plots were able to increase the knowledge of the Subur farmer group. The pre-test score was 65,1 (55%) while the post-test was 88,6 (75%). Based on the evaluation of the assessment of training activities by farmers, as many as 74,3% of farmers stated that they strongly agreed that the porang cultivation training was very useful and suitable for their needs. In addition, the activity feasibility analysis showed that this training is categorized as very feasible to be implemented with a score of 94%. Porang cultivation training for the Subur farmer group was able to increase knowledge and the potential to earn additional income for the people of Sugihwaras Village, Magetan Regency, East Java.
Co-Authors Adni, Salsa Fauziyyah Ahmad Fahrur Rizqi Alfiyah, Faiqotul Alifioni, Kintan Amelia Nurlatifah AN Ikhfan Arif Kurnia Wijayanto Arzyana Sunkar Azizah, Ummiati David Anderson Lubis Dicky Maulana Dimas Nur Muhammad Elis Nina Herliyana Esperansa Olivita Fajar Raihan Fatimah, Gintan Fitta Setiajiati Ghalib, Ammar Halus Satriawan Hanifa Rahmah Hasanah, Asmaul Hidayati, Syafitri Hilmi Naufal Madani Hutagalung, Labana Istomo . Kamilia Ulfah KD, Elisabeth Violetta Khorina Rahmadhani Kulsum, Fifit Lina Karlinasari Madani, Hilmi Naufal Mudzaky, Rafi Hanif Muhammad Kanzun Nafis Muhammad, Dimas Nur Mursalina Nur Buana Novia Damayanti Novita Julia Astuti Nur Intan Simangunsong Nurafni Natasya Nurheni Wijayanto Prijanto Pamoengkas Rahmadhani, Khorina Rifana, Haikal Zaky Rini - Fitri Rita Rahmawati Rizka Aulian Kusuma Salma Khairunnisa Saputri, Hanum Resti Satriawan, Handi Solikhin, Achmad Sopha Erna Ariyana Sri Rahaju Sri Wilarso Budi TA Karimatunnisa Talitha Nur Syahira Trirana, Sarah Ulfah Juniarti Siregar Wijayanto, Nurheni Yurico Bakhri