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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Penelitian Hasil Hutan
Reni Setyo Wahyuningtyas
Balai Penelitian Kehutanan Banjarbaru Jl. A Yani Km 28.7 Landasan Ulin Banjarbaru Kalsel Telp. (0511)4707872
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management

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PEMANFAATAN GULMA LAHAN GAMBUT SEBAGAI BAHAN BAKU BIO-BRIKET Susanti, Pranatasari Dyah; Wahyuningtyas, Reni Setyo; Ardhana, Adnan
Jurnal Penelitian Hasil Hutan Vol 33, No 1 (2015): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Litbang Keteknikan Kehutanan dan Pengolahan Hasil Hutan

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Abstract

Gulma tersedia secara melimpah dan tumbuh di lahan gambut,tetapi sayangnya belum dimanfaatkan secara luas. Gulma tersebut secara prospektif potensial untuk dimanfaatkan sebagai bahan baku bio-briket. Tujuan penelitian ini adalah untuk mengetahui kualitas bio-briket yang berasal dari 10 jenis gulma lahan gambut. Awalnya, setiap jenis gulma dikarbonasi menjadi serbuk arang. Serbuk arang tersebut kemudian dicampur dengan serbuk gergaji pada perbandingan 1:1, dan diaduk secara menyeluruh untuk mendapatkan campuran yang homogen. Selanjutnya campuran tersebut ditambah dengan bahan perekat dari tepung kanji. Bahan perekat tersebut sebelumnya disiapkan dengan memanaskan 5 g tepung kanji ke dalam 75 ml air. Setelah ditambahkan perekat, campuran homogen tersebut kemudian dipres untuk menjadi bio-briket, dan selanjutnya dioven pada suhu 60°C selama 24 jam atau dikeringkan di bawah panas matahari selama 2 hari. Parameter yang diuji meliputi nilai kalor, karbon terikat, kadar abu dan sulfur. Hasil penelitian menunjukkan bahwa gulma purun tikus (Elecharis ochrostachys Steud.) merupakan jenis yang menghasilkan bio-briket terbaik karena lebih unggul dari jenis lain pada parameter yang diuji secara keseluruhan yaitu nilai kalor (4.647,9 kal/g), karbon terikat (25,63%), kadar air (5,48%), kadar abu (8,78%) dan sulfur (0,55%).
Assessing Habitat Suitability for the Invasive Species Lantana camara on Bali Island: A Model Using the Biodiversity and Climate Change Virtual Laboratory (BCCVL) Iryadi, Rajif; Sutomo; Saputra, Muhammad Hadi; Humaida, Nida; Pujiono, Eko; Sukmawati, Jalma Giring; Hani, Aditya; Swari, Komang Kartika Indi; Sari, Dewa Ayu Intan; Atmaja, Muhammad Bima; Herningtyas, Wieke; Wahyuningtyas, Reni Setyo; van Etten, Eddie
Jurnal Manajemen Hutan Tropika Vol. 30 No. 3 (2024)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7226/jtfm.30.3.305

Abstract

Indonesia, known for its high biodiversity, is threatened due to alien plants that invade local plant species in forest areas. West Bali National Park is overgrown with invasive exotic plants, such as Lantana camara L., known locally as the kembang telek. The research aims to predict the distribution of L. camara using species distribution models (SDMs) and analysis variable contribution in the model featured in the biodiversity climate change virtual laboratory (BCCVL) application. L. camara distribution prediction model in Bali used the Bioclim data input by identifying areas of low, medium, and high habitat suitability. Central mountainous regions, including parts of Buleleng, Jembrana, Bangli, Karangasem, and Tabanan, show the highest suitability. Response curves demonstrated the correlation between climate variables and occurrence probability, highlighting the specific condition of rainfall and temperature ranges favoring Lantana's growth. The model showed a reliable AUC value of 0.89, indicating realibility. Potential improvements through additional environmental parameters were suggested. While L. camara has some potential benefits as a medicinal plant in Balinese culture, its invasive nature poses significant threats to native ecosystems. The predictive map offers valuable insights for authorities to implement initiative-taking strategies for preventing and controlling Lantanas spread in vulnerable areas of Bali.
Species Distribution Model and Conservation of Mentaok (Wrightia javanica) in Indonesia Sutomo; Humaida, Nida; Wahab, Luthfi; Saputra, Muhammad Hadi; Kurniawati, Fitri; Atmaja, Muhammad Bima; Pujiono, Eko; Sukmawati, Jalma Giring; Hani, Aditya; Iryadi, Rajif; Herningtyas, Wieke; Wahyuningtyas, Reni Setyo
Jurnal Manajemen Hutan Tropika Vol. 31 No. 1 (2025)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7226/jtfm.31.1.1

Abstract

The Alas Mentaok was a forest dominated by the mentaok tree (Wrightia javanica) that once existed in Yogyakarta, Java Island, Indonesia. This forest has cultural and historical value, as it is believed to be the first location to establish the Mataram Islam Kingdom in Java in 1582 AD. This study utilized species distribution models (SDMs) to investigate the species distribution pattern and assess its latest conservation status in Java and the Lesser Sunda Islands, Indonesia. The methodology used involved collecting occurrence and environmental data of W. javanica, conducting species distribution modeling using the maximum entropy algorithm, evaluating the model's accuracy, and performing an independent assessment of the area of occupancy (AOO) and extensive occurrence (EOO) using the geospatial conservation assessment tool (GeoCAT). While the number of suitable habitat areas for W. javanica in Yogyakarta is projected to decrease by 2100, the islands of Sumba and Timor are anticipated to experience an increase in the suitable habitat areas for the species during the same year. The analysis of BIOCLIM 34 indicates the mean moisture index of the warmest quarter plays a vital role in the current and future projections. AOO calculation in GeoCAT places this species in the endangered (EN) category, particularly within our regions of interest in Java and the Lesser Sunda Islands. Overall, a full assessment combining a habitat suitability model with current conservation status information would provide a more comprehensive understanding of mentaok's habitat preferences and current conservation status in Indonesia.
Co-Authors Aditya Hani Adnan Ardhana Atmaja, Muhammad Bima Eko Pujiono Fitri Kurniawati Herningtyas, Wieke Humaida, Nida Iryadi, Rajif Pranatasari Dyah Susanti Saputra, Muhammad Hadi Sari, Dewa Ayu Intan Sukmawati, Jalma Giring SUTOMO Swari, Komang Kartika Indi van Etten, Eddie Wahab, Luthfi