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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.
Komposisi dan Struktur Jenis Pohon pada Sistem Agroforestri Bambang Lanang di Empat Lawang, Sumatra Selatan: Tree Species Composition and Structure of Bambang Lanang Agroforestry System in Empat Lawang, South Sumatra Lanuriati, Arisna; Sundawati, Leti; Hartoyo, Adisti Permatasari Putri
Jurnal Silva Tropika Vol. 10 No. 1 (2026): Jurnal Silva Tropika
Publisher : Fakultas Kehutanan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jurnalsilvatropika.v10i1.48033

Abstract

ABSTRACT Communities in Empat Lawang Regency, South Sumatra have implemented an agroforestry system. Bambang lanang (Magnolia champaca) is a local species and is mainly cultivated by the local communities in Empat Lawang Regency as a carpentry tree. However, the information of tree species composition and structure of Bambang lanang agroforestry system is still limited. This study aimed to analyze the tree species composition and structure in the Bambang lanang community forests. The method used was vegetation analysis in 4 villages with a total plot was 100 plots. The results showed that the agroforestry pattern was the most widely used pattern by Bambang lanang's farmers. The highest total plant species in the Bambang lanang community forest was found in Fajar Bakti Village (26 species). The highest number of species at the level of seedlings, saplings, poles, and trees in order were found in the villages of Muara Pinang (17 species), Paiker (17 species), Muara Pinang (12 species), and Paiker (20 species). The dominant plant species composition in the community forest is Bambang lanang, combined with Coffee (Coffea sp.), and Durian (Durio sp.). The agroforestry system contributes to the vegetation diversity.   Keywords: complex agroforestry, Sumatra, vegetation analysis, vegetation diversity   ABSTRAK Masyarakat di Kabupaten Empat Lawang, Sumatra Selatan telah mengimplementasi sebuah sistem agroforestry. Bambang lanang (Magnolia champaca) adalah jenis lokal dan umum dibudidayakan oleh masyarakat lokal di Kabupaten Empat Lawang sebagai kayu pertukangan. Oleh karenanya, informasi mengenai komposisi dan struktur jenis pohon pada sistem agroforestri Bambang lanang masih terbatas. Penelitian ini bertujuan untuk menganalisis komposisi dan struktur jenis pohon pada hutan masyarakat Bambang lanang. Metode yang digunakan adalah analisis vegetasi di 4 desa dengan total plot sebanyak 100 plot. Hasil penelitian menunjukkan pola agroforestri paling banyak digunakan oleh petani Bambang lanang. Jumlah spesies tertinggi ditemukan di hutan masyarakat Bambang lanang Desa Fajar Bakti (26 spesies). Jumlah spesies semai, pancang, tiang, dan pohon secara berurutan ditemukan di Desa Muara Pinang (17 spesies), Paiker (17 spesies), Muara Pinang (12 spesies), dan Paiker (20 spesies). Komposisi spesies tumbuhan dominan di hutan masyarakat adalah Bambang lanang yang dikombinasikan dengan kopi (Coffea sp.) dan durian (Durio sp.). Sistem agroforestri berkontribusi terhadap keanekaragaman vegetasi.   Kata kunci: agroforestri kompleks, analisis vegetasi, keanekaragaman vegetasi, Sumatra
Estimasi Tutupan Vegetasi menggunakan Normalized Difference Vegetation Index (NDVI) dan Keanekaragaman Jenis Pohon di sekitar Kawasan Ekosistem Leuser: Estimating Vegetation Cover using Normalized Difference Vegetation Index (NDVI) and Tree Species Diversity around Leuser Ecosystem Area Hartoyo, Adisti Permatasari Putri; Sunkar, Arzyana; Hidayati, Syafitri; Istomo
Jurnal Silva Tropika Vol. 10 No. 1 (2026): Jurnal Silva Tropika
Publisher : Fakultas Kehutanan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jurnalsilvatropika.v10i1.48030

Abstract

ABSTRACT Leuser Ecosystem Area (LEA) is an essential tropical forest ecosystem with an expansive approximately 2,6 Mha. Baseline data of tree species diversity and structure around LEA is limited, whereas vegetation cover as a portion of forest monitoring in GLNP still needs to be considered. The objectives of this study were 1) to estimate vegetation cover changes in LEA in 2016, 2020, and 2021 and 2) to analyze vegetation composition and structure in the natural forests (NF) of GLNP, as well as in the agroforestry system (AF) of Mude Nosar Village, Central Aceh Province where the parts of LEA. The methods used were the Normalized Different Vegetation Index (NDVI) for vegetation cover estimation and vegetation analysis in both locations. NDVI analysis resulted in 5 classes of vegetation cover in LEA, to be specific non-vegetation (class 1), very low dense vegetation (class 2), low dense vegetation (class 3), moderately dense vegetation (class 4), and highly dense vegetation (class 5). LEA vegetation cover in 2016, 2020, and 2021 is dominated by class 5 (highly dense vegetation). The most frequent seedling, sapling, pole, and tree species that grew in NF of GLNP in order were Geseng tanduk (Quercus sp.), Geseng minyak (Lithocarpus lucidus), Geseng pagar anak (Lithocarpus sp.), and Geseng batu (Lithocarpus conocarpus). The dominant species in AF were rumput kerbau (Paspalum conjugatum) at the understory and seedling level, coffee (Coffea arabica) at the sapling level, lamtoro (Leucaena leucocephala) at the pole and tree level. Tree structures in the NF of GLNP are reverse J-curves, while in AF of Mude Nosar Village are not fully reverse J-curves. The success of AF depends on considering tree species composition and structure, along with the specific needs and goals of the landowners. Consequently, enrichment planting in AF is necessary for biodiversity improvement.   Keywords: agroforestry, Gunung Leuser National Park, Mude Nosar Village, species composition, tree structure         ABSTRAK Kawasan Ekosistem Leuser (KEL) merupakan ekosistem hutan tropis yang penting dengan luas sekitar 2,6 juta hektar. Data dasar mengenai keanekaragaman dan struktur spesies pohon di sekitar KEL masih terbatas, sementara tutupan vegetasi sebagai bagian dari pemantauan hutan di Taman Nasional Gunung Leuser (TNGL) masih perlu diperhatikan. Tujuan penelitian ini adalah 1) memperkirakan perubahan tutupan vegetasi di KEL pada tahun 2016, 2020, dan 2021 serta 2) menganalisis komposisi dan struktur vegetasi di hutan alam (NF) TNGL serta sistem agroforestri (AF) di Desa Mude Nosar, Kabupaten Aceh Tengah, yang merupakan bagian dari KEL. Metode yang digunakan meliputi indeks vegetasi berbasis Normalized Difference Vegetation Index (NDVI) untuk estimasi tutupan vegetasi dan analisis vegetasi di kedua lokasi. Analisis NDVI menghasilkan lima kelas tutupan vegetasi di KEL, yaitu tanpa vegetasi (kelas 1), vegetasi sangat jarang (kelas 2), vegetasi jarang (kelas 3), vegetasi sedang (kelas 4), dan vegetasi sangat rapat (kelas 5). Tutupan vegetasi KEL pada tahun 2016, 2020, dan 2021 didominasi oleh kelas 5 (vegetasi sangat rapat). Spesies yang paling sering ditemukan pada tingkat semai, pancang, tiang, dan pohon di NF TNGL secara berurutan adalah geseng tanduk (Quercus sp.), geseng minyak (Lithocarpus lucidus), geseng pagar anak (Lithocarpus sp.), dan geseng batu (Lithocarpus conocarpus). Spesies dominan di AF adalah rumput kerbau (Paspalum conjugatum) pada tingkat bawah dan semai, kopi (Coffea arabica) pada tingkat pancang, serta lamtoro (Leucaena leucocephala) pada tingkat tiang dan pohon. Struktur pohon di NF TNGL mengikuti pola kurva J-terbalik, sementara di AF Desa Mude Nosar tidak sepenuhnya mengikuti pola J-terbalik. Keberhasilan AF bergantung pada pertimbangan komposisi dan struktur spesies pohon, serta kebutuhan dan tujuan pengelola lahan. Oleh karena itu, penanaman pengayaan dalam sistem AF diperlukan untuk meningkatkan keanekaragaman hayati.   Kata kunci: agroforestri, Desa Mude Nosar, komposisi spesies, struktur pohon, Taman Nasional Gunung Leuser
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 Lanuriati, Arisna Leti Sundawati 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