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All Journal Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat IJEMS (Indonesian Journal of Environmental Management and Sustainability) Agritech: Jurnal Fakultas Pertanian Universitas Muhammadiyah Purwokerto Journal of Sylva Indonesiana
Alfan Gunawan Ahmad
Forest Conservation Departement, Sumatera Utara University, Jl. Tri Darma Ujung No I, Medan 20155, North Sumatera, Indonesia
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Environmental Science Law, Crime, Criminology & Criminal Justice Public Health Social Sciences

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Fragmentation Typology of Sumatran Tropical Lowland Forest, Labuhanbatu Selatan - Indonesia Samsuri; Febrianti Sitorus; Anita Zaitunah; Alfan Gunawan Ahmad
Indonesian Journal of Environmental Management and Sustainability Vol. 5 No. 3 (2021): September
Publisher : Research Centre of Inorganic Materials and Complexs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2021.5.3.105-112

Abstract

Forest land cover experienced changes caused by various factors. Deforestation and forest degradation decreased forest structure and size that produce forest fragmentation. This study aimed to determine spatial distribution patterns and typology of forest fragmentation in the Labuhanbatu Selatan district. The study uses land cover image analysis, forest fragmentation analysis, correlation analysis, and typology analysis. Forest fragmentation is determined based on patch area (CA), patch density (PD), contiguity index (CONTIG), and proximity index (PROX). The study analyzes the correlation between variable factors and the degrees of forest fragmentation to develop a typology of fragmentation forest. The variables used to construct the typology of forest fragmentation are population density, productive age ratio, income, and slope. The classification of forest fragmentation has been completed to create a forest fragmentation typology. To determine the typology of forest fragmentation, the K-Means Cluster analysis method is used. Typology of forests fragmentation of Labuhanbatu Selatan district is three typologies. Typology 1 is the low forest fragmentation of Torgamba, Silangkitang, and Kota Pinang sub-district, typology 2 is moderate forest fragmentation are the Kampung Rakyat, and Typology 3 is high forest fragmentation of Sungai Kanan sub-district.
INDEKS PERSEPSI MASYARAKAT TERHADAP RENCANA RESTORASI LANSKAP HUTAN TROPIS TERDEGRADASI DAS LEPAN, LANGKAT Samsuri Samsuri; Anita Zaitunah; Alfan Gunawan Ahmad
Agritech: Jurnal Fakultas Pertanian Universitas Muhammadiyah Purwokerto Vol 19, No 1 (2017): AGRITECH
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/agritech.v19i1.2092

Abstract

Kondisi sosial ekonomi menjadi salah kunci penting keberhasilan kegiatan restorasi landscape. Persepsi masyarakan terhadap pelaksanaan kegiatan restorasi landscape hutan sangat bervariasi bergantung pada tingkat pendapatan, tingkat pendidikan, jenis pekerjaan utama, umur dan lama tinggal. Penelitian ini bertujuan untuk mendapatkan indeks persepsi masyarakat perencanaan restorasi lanskap hutan tropis di kabupaten Langkat. Wawancara terstruktur dilakukan untuk mendapatkan persepsi masyarakat terhadap rencana restorasi lanskap. Analisis skoring menggunakan skala Likert digunakan untuk mendapatkan indeks persepsi persepsi masyarakat terhadap rencana restorasi lanskap hutan terdegradasi di kabupaten Langkat. Berdasarkan tipe pekerjaannya, masyarakat yang mata pencahariannya sangat bergantung pada kualitas sumber daya alam sangat setuju dan akan berpartisipasi dalam tahapan-tahapan restorasi. Kelompok pekerjaan petani lebih mendukung restorasi landscape dibandingkan dengan pekerja atau pemilik perkebunan. Model regreasi linear hubungan antara indeks persepsi restorasi dengan faktor sosial ekonomi adalah y = 0,8544–0,0699 pendapatan + 0,0330 pekerjaan dengan nilai koefisien determinasi 22,20 %. Kelompok jenis pekerjaan dan tingkat pendapatan yang secara signifikan mempengaruhi kemungkinan partisipasi masyarakat dalam restorasi landscape hutan.
Adaptability of Kemenyan Toba (Styrax sumatrana) and Suren (Toona sureni) On Gold Mining Tailing Susilowati, Arida; Ahmad, Alfan Gunawan; Sirait, David Raymod
Journal of Sylva Indonesiana Vol. 2 No. 01 (2019): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (702.981 KB) | DOI: 10.32734/jsi.v2i01.907

Abstract

Tailing was residue of gold mining process which lead to some environment problem. Beside containing heavy metal, tailing have lower soil fertility, physical, chemical and biological characteristics. To overcome this problem, revegetation activities was needed. The succesfulness of revegetation activities determined by adaptive trees selection. Local species was recommended because suitable to local climate and soil conditions, in this study we choosed toba benzoin (Styrax sumatrana) and suren (Toona sureni). The objective of this research was to get information about adaptability of toba benzoin and suren on growth media containing tailings. Research was conducted in green hause Faculty of Agriculture, University of Sumatera Utara. Factorial Randomized Completely Design with two factor were used in this research. The first factor was growing media (Factor A) and the second factor was seedling species (Factor B). The observed parameter were seedling height, seedling diameter, seedling dry weight, primary root lenght, shoot-root ratio and chemical properties of media. The results showed that the species and growing medium significantly affected the height growth of seedlings, seedling diameter, seedling dry weight and length of the primary root. The addition of topsoil and compost able to improve the chemical properties of the tailings are used. Tailings media and compost with composition ratio of 1:1 is recommended for Toba benzoin and Suren. That media provide the most optimal results of Toba benzoin and suren growth.
Analysis of land cover change due to deforestation at Holiday Resort Nature Park, North Sumatra Province, Indonesia Daulay, Ulil Amri; Ahmad, Alfan Gunawan; Purwoko, Agus
Journal of Sylva Indonesiana Vol. 6 No. 01 (2023): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsi.v6i01.9229

Abstract

. Deforestation activities in Indonesia are increasingly becoming a real concern. All of these actions resulted in the loss of 50% of the world's tropical forests, impacting the livelihoods of forest-dependent people. Changes in land cover are common in natural resource use areas. Land change is an important issue for planners and policymakers. One of them is the encroachment of the Holiday Resort Nature Park (HRNP) area of North Sumatra Province, which is a form of forest governance and weak law enforcement. Especially in this area, there are Sumatran elephants (Elephas maximus sumatranus), which are classified as critically endangered species. Analysis of land cover change can be used as material for formulating policies. By utilizing the Geographic Information System (GIS), it will be easier to analyze land cover and land use changes. The purpose of this study was to analyze land cover changes due to deforestation at HRNP. Spatial analysis of cover change using imagery and testing the accuracy of deforestation data, land cover satellite imagery, and verification in the field. The results showed that during the past 30 years, there has been deforestation from secondary dryland forest of 2079.3 ha to forest, namely swamp shrubs covering an area of 30.5 ha (1.5%) and non-forest covering an area of 2048.8 ha (98.6%). The highest deforestation rate occurred from 1996 to 2000 as much as 2027.3 ha (97.5%). The form of land cover due to deforestation is plantations 1990.8 ha (95.7%) and land cover forms 57.8 ha (2.8%). The conclusion shows that deforestation was triggered by weak law enforcement from the beginning until now, thus providing a more realistic opportunity for communities to encroach
Spatial Information Technology Adoption for Developing Data Base of Village Resources Samsuri; Slamet, Bejo; Zaitunah, Anita; Ahmad, Alfan Gunawan; Razali; Arisandi, Dedi
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 2 (2021): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1799.472 KB) | DOI: 10.32734/abdimastalenta.v6i2.6266

Abstract

The village has an important role and position in national development because the concentration and other natural resources are in the village. Planning for village development activities must be harmonious and sustainable, so the need for data and information is very important. Lubuk Kertang Village, Pangkalan Brandan District, Langkat Regency is one of the villages with a lot of potentials that can be used as capital in village development. However, the potential data has not been compiled in a database that can be accessed, manipulated, and updated systematically. Therefore, it is necessary to compile a database of village potential to support significant development planning to be directed and achieve goals. The application of spatial technology to build a database on village potential is currently integrated with the internet network. It can be accessed from anywhere and anytime. Exploration of potential data shows that Lubuk Kertang village has the potential for agriculture, fisheries, forestry, small industry, and ecotourism spread across five hamlets. To manage this village potential database, training data administrators in exploring data, inputting data, and updating data is an important factor in managing the village potential database. Village government officials are very interested and can manage their village potential database
Co-Authors Agus Purwoko Anita Zaitunah Anita Zaitunah Anita Zaitunah Arida Susilowati Iswanto Arisandi, Dedi Bejo Slamet Febrianti Sitorus Razali Samsuri Samsuri Samsuri Samsuri Sirait, David Raymod Ulil Amri Daulay