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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Pertanian Indonesia Jurnal Silvikultur Tropika (JST) MEDIA KONSERVASI Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences Jurnal Penelitian Hutan dan Konservasi Alam Proceeding International Conference on Global Resource Conservation Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) BERITA BIOLOGI Jurnal Hutan dan Masyarakat Biosaintifika: Journal of Biology & Biology Education Jurnal Agrotek Lestari Jurnal Pusat Inovasi Masyarakat Jurnal Sylva Lestari JURNAL HUTAN TROPIS Jurnal Ilmu Kehutanan Jurnal Riset Multidisiplin Edukasi

Iwan Hilwan

Department Of Silviculture, Faculty Of Forestry, Bogor Agricultural University, Bogor, Indonesia

Author-ID : 282126

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Energy Environmental Science Health Professions Materials Science & Nanotechnology Social Sciences Other

Published : 49 Documents Claim Missing Document

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Species Diversity of Dipterocarpaceae in Production Forest of Siberut Island, West Sumatra Hilwan, Iwan
Proceeding International Conference on Global Resource Conservation Vol 4, No 1: Proceeding of 4th ICGRC 2013
Publisher : Proceeding International Conference on Global Resource Conservation

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.209 KB)

Production forest in Sumatra, Kalimantan, and other islands, are located in lowland tropical rain forest, where in that forest type were dominated by plant species of Dipterocarpaceae. Many tree species of Dipterocarpaceae was cut to produce major commercial timber.Â That timber harvesting activity with selective cutting method can rise impact to stand density and species diversity of Dipterocarpaceae.Â Because that condition, study on species diversity and stand density of Dipterocarpaceae in virgin forest (VF) and logged over area (LOA) is very important to provide data and information for forest management. According vegetation analysis in 1 ha sample plots at virgin forest and logged over area, can be found 6 species of Dipterocarpaceae, that is 3 species Shorea, 2 species Dipterocarpus, and 1 species Hopea, they are namely:Â Shorea retinodes v. Slooten, Shorea ovalis (Korth.) Blume, Shorea pauciflora King, Dipterocarpus hasseltii Blume, Dipterocarpus elongatus Korth., dan Hopea dryobalanoides Miq..Â Plant species of Dipterocarpaceae especially Shorea pauciflora King, Dipterocarpus elongatus Korth., andÂ Dipterocarpus hasseltii Blume are grown in great number and dominated stand structure of production forest both in virgin forest and logged over forest, whereas in fact these species are cut in timber harvested operation (over 90% of timber cutting).Â Keywords: Dipterocarpaceae, production forest, selective cutting

KOMUNIKASI PENDEK ETNOBOTANI DAMAR PADA ORANG RIMBA DI TAMAN NASIONAL BUKIT DUABELAS [Ethnobotany of Dammar by Orang Rimba in Bukit Duabelas National Park ] Andhika, Rana Rio; Muhadiono, Muhadiono; Hilwan, Iwan
BERITA BIOLOGI Vol 15, No 1 (2016)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v15i1.2863

Orang Rimba have local knowledge about utilization of dammar in Bukit Duabelas National Park .The research was aimed to record the type of dammar and explore local knowledge Orang Rimba utilizing dammar. Data were collected through interviews, participant observation and documentation . Data analysed as qualitative descriptive. There were 15 plant species whose resin were used by Orang Rimba i.e Dipterocarpus baudii, Dipterocarpus hasseltii, Hopea mengarawan, Hopea dryobalanoides, Dacryodes rugosa., Santiria laevigata, Shorea bracteolata, Parashorea aptera, Canarium pilosum, Shorea retinoides, Shorea cf. singkawang, Santiria dacryodifolia, Shorea multiflora dan Sarong (Trigona spp). Dammar were used Â as a fuel, medicine, adhesive material and traditional rituals. General use of dammar was for traditional Torch lighting (blebayon).

Ecobiology Test of Mantangan Species (Merremia peltata (L.) Merr.) from the Bukit Barisan Selatan National Park, Lampung Kurniawati, Kurniawati -; Muhadiono, Muhadiono; Hilwan, Iwan
Journal of Tropical Life Science Vol 9, No 2 (2019)
Publisher : Journal of Tropical Life Science

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Mantangan (Merremia peltata (L.) Merr.) is a woody liana. Nowadays, it has become invasive in Bukit Barisan Selatan National Park. The objectives of this research were to analyze: 1) effect of light intensity on the growth of mantangan in natural and artificial shade, 2) effect of sand addition to the soil media and trimming on the growth rate of mantangan. Forest profile was made at the field in three locations with three light intensity levels: low, moderate, and high. A completely randomized design by three factors: shade, soil media and trimming were used. Parameters measured were stem length, leaf and buds number, fresh and dry weight. Forest profile analysis showed that high light intensity forest was dominated bay mantangan. In contrast, growth of mantangan was inhibited in low light intensity (75% shade), with lower dry weight (1.50 g). Soil media and trimming did not affect significantly on growth of mantangan.

Carbon Emission Reduction Potential through Sustainable Forest Management in Forest Concession of PT Salaki Summa Sejahtera, Province of West Sumatera Iwan Hilwan; Andry Indrawan; Supriyanto; Teddy Rusolono
Jurnal Manajemen Hutan Tropika Vol. 18 No. 3 (2012)
Publisher : Institut Pertanian Bogor (IPB University)

A management unit (MU) of a forest concession holder implementing the sustainable forest management (SFM) principles, could be involved in reducing Emmission from Reforestation and Forest Degradation (REDD+) and carbon trading project. The fact the strategic in implementing the REDD+ and carbon trading in MU level is still lack of pilot project and methodology. Therefore, some scenarios must be developed and tested to find out the best potential of carbon credit in MU level. The objectives of the research were: to calculate carbon credit in some SFM scenarios, to analyze of carbon trading project feasibility, and to determine carbon stock recovery period of logged over area (LOA). The result revealed that carbon stock and carbon credit of LOA was affected by timber cutting intensity. The 6th scenario with lowest annual allowable cutting (AAC) obtained greater carbon credit and profit coming from timber harvesting income and carbon trading. In other hand, this scenario has shortest duration of carbon stock recovery period (27 years) and shorter than its cutting cycle. In this case, the MU has to recalculate and to decrease its AAC to have highest benefits from carbon trading in the same cutting cycle period. It will provide double benefits from carbon trading, those are contribution in achieving the SFM purposes (production, ecology, social) and climate change mitigation.

Potensi Cadangan Karbon Hutan Nabundong KPH Wilayah VI Sumatera Utara Yustika Fadilah Siregar; Basuki Wasis; Iwan Hilwan
Jurnal Ilmu Pertanian Indonesia Vol. 23 No. 1 (2018): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Tropical forest plays a major role in global carbon (C) cycle, about 50% of the total carbon is stored in biomass and 50% is stored in the top 1 m of the soil. Research on the potential for carbon stock was conducted in Nabundong forest in Padang Lawas Utara District. It was managed by the FMU (Forest Management Unit) region VI North Sumatra. This research aims to identify forest structure, estimate above ground biomass using allometric equations, and determine the carbon stock potential of Nabundong forest. The results showed that stratum I (212.68 tonC/ha) had higher carbon stock than stratum II (151.78 tonC/ha).

Land Rehabilitation on Post-fire Area with Different Types of Soil in Gunung Mas Regency, Central Kalimantan Arin Annisa Fathia; Iwan Hilwan; Cahyo Wibowo
Media Konservasi Vol 24 No 1 (2019): Media Konservasi Vol. 24 No. 1 April 2019
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Forest and land fires can cause damage to forest ecosystems. Repeated fires cause the natural succession to be disrupted. Therefore, based on these problems, to improve the productivity of land after fires in Central Kalimantan, rehabilitation efforts needs to be done. This study aims to analyze the growth response of forestry plants in post-fire area with different soil types. This study consisted of six combinations of treatments namely controls (B0C1 and B0C2), treatment of dolomite, biochar, and compost (B1C1 and B1C2), and treatment of dolomite and NPK (B2C1 and B2C2) that planted randomized and rows Trees species were used in this research were Paraserianthes falcataria, Anthocephalus cadamba, Acacia mangium, and Campnosperma auriculata. Soil samples were also collected for analysis of soil physical and chemical properties on laboratory. This study showed that fertilization treatment significantly affected the increase of height and diameter of four trees species, while planting techniques (randomized and rows) did not significantly affected the increase of height and diameter of four trees species. Dolomite, biochar, and compost application significantly affected the increase of height and diameter of four trees species that planted randomized and rows (B1C1 and B1C2) in Podsol soil. Besides that, NPK and dolomite application significantly affected the increase of height and diameter of four trees species planted by randomized and rows (B2C1 and B2C2) in Acrisol soil. The fastest growth rate was A. mangium followed by P. falcataria, A. cadamba, and C. auriculata on Podsol and Acrisol soil. Based on the observations, P. falcataria, A. cadamba, A. mangium, and C. auriculata are recommended to be planted on both types of soil. Keywords: forestry plants, growth respon, Gunung Mas Regency, land rehabilitation, soil types

Analysis of Constructed Swamp Forest Vegetation as A Phitoremediation Agent in Coal Mining, South Kalimantan Citra Rahmatia; Iwan Hilwan; Irdika Mansur; Ihsan Noor
Media Konservasi Vol 24 No 1 (2019): Media Konservasi Vol. 24 No. 1 April 2019
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Coal mining activities could potentially interfere with the environment. One of the environmental disturbances in coal mining activities is theformation of acid mine drainage (AMD). AMD management can be done passively through the construction of swamp forest. The constructed swampforest system uses organic material in the form of cow manure which serves as a growing plants’ medium. Phytoremediation is an attempt to usevplant species in the accumulation of heavy metals. This study was aimed to know the AMD management system passively and identify the diversity ofplants in artificial swamp forests. Purposive sampling method with a sample size of 2 x 2m in 10 plots/compartments was used to identify the plantdiversity in constructed swamp forest. The observation was made both before and after AMD flowed. Constructed swamp forest consist of 6compartments (2 sediment pond compartments and 4 swamp compartments). The results of the vegetation analysis found that before the AMD flowed,21 species are still capable growing naturally in constructed swamp forest, however, it became 15 after the AMD flowed. Cyperus iria, Fimbristylisgriffithii, Scirpus juncoides, Ludwigia hyssopifolia, Cyperus platystylis and Monochoria vaginalis are six dominant species that can be used asphytoremediation agent in constructed swamp forest.Keywords: Acid Mine Drainage, constructed swamp forest, phytoremediation

POTENSI CADANGAN KARBON PADA LAHAN REHABILITASI DI KABUPATEN GUNUNG MAS, KALIMANTAN TENGAH: Carbon Stock Potential in Rehabilitation Land at Gunung Mas District, Central Kalimantan Ria Astuti; Basuki Wasis; Iwan Hilwan
Media Konservasi Vol 25 No 2 (2020): Media Konservasi Vol. 25 No. 2 Agustus 2020
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/medkon.25.2.140-148

Pemanasan global maupun deforestasi merupakan salah satu permasalahan paling serius untuk lingkungan. Rehabilitasi hutan dapat dilakukan sebagai salah satu upaya penyerapan emisi karbon. Penelitian bertujuan untuk menentukan besaran biomassa, karbon serta penyerapan CO2 sebelum dan setelah rehabilitasi dengan metode non destruktif. Penelitian dilakukan pada lima tutupan lahan (lahan rehabilitasi 2015, 2016, 2017, lahan terbuka, dan hutan sekunder) di tiga kecamatan (Manuhing, Rungan Barat, dan Manuhing Raya) di Kabupaten Gunung Mas, Kalimantan Tengah. Kandungan biomassa di atas permukaan tanah pada lahan rehabilitasi tertinggi baik pada tahun tanam 2015 maupun 2016 terdapat di Kecamatan Manuhing Raya, sedangkan pada tahun 2017 di Kecamatan Manuhing, hasil tersebut terjadi karena adanya input tambahan berupa pupuk alami di lokasi tersebut sehingga meningkatkan kesuburan tanah dan menjadikan pertumbuhan tanaman lebih baik. Total biomassa pada beberapa tutupan lahan di Kabupaten Gunung Mas semakin menurun dengan urutan: hutan sekunder (465,12-806,48 ton/ha) > lahan rehabilitasi (0,77-84,89 ton/ha) > lahan terbuka (0,001-0,06 ton/ha). Simpanan karbon mengalami penurunan yang sangat drastis dari 310,24-418,62 ton C/ha menjadi 7,25-29,43 ton C/ha karena deforestasi dan alih fungsi hutan. Kegiatan rehabilitasi mampu meningkatkan kembali kemampuan suatu lahan dalam menyerap dan menyimpan cadangan karbon secara berkelanjutan. Kata kunci: cadangan karbon, hutan sekunder, lahan rehabilitasi, lahan terbuka, rehabilitasi

Identification of Red Meranti Group (Shorea spp., Dipterocarpaceae) Saplings Based on Variations in the Morphological Features of Quantitative Leaves Nur Mufarhatun; Iwan Hilwan; Henti Hendalastuti Rachmat
Jurnal Penelitian Hutan dan Konservasi Alam Vol 18, No 2 (2021): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphka.2021.18.2.137-149

Shorea is the largest genus within the family of Dipterocarpaceae, a major timber tree dominating tropical forest in South East Asia. The genus of Shorea has many similarities, and species identification is often tricky. Most Shorea (Dipterocarpaceae) species perform as a big emergent tree; thus, species discrimination at seedlings level will benefit practical use in the field scale. A study of variations of leaf morphology and color on Red Meranti seedlings growing in an experimental nursery. A total of 450 individuals of 29 species of the Red Meranti were measured for their leaf characters. Data analysis was performed using the application R Statistics 3.6.0, RawTherapee 5.5, ImageJ 1.32, nixsensor, and encycolorpedia.id to obtain the leaf color of the observed species. Cluster analysis (Hierarchical Cluster Analysis) and Principal Component Analysis (PCA) were executed using IBM SPSS Statistics 25. The results showed that 11 of 13 observed leaf characters were, all variables support the grouping and species kinship, and those can be as determinants, except for AS and BS. Leaves color may be helpful in species determination only if transformed into digital color. This study result supports current taxonomical grouping based on flower and fruit characteristics.

Pengaruh Tingkat Penggenangan terhadap Pertumbuhan Semai Pedada (Sonneratia caseolaris (L.) Engler) di Kawasan Mangrove Tol Sedyatmo Angke Kapuk, Jakarta Utara Yuda Purnama; Iwan Hilwan; Cecep Kusmana
Jurnal Silvikultur Tropika Vol. 3 No. 1 (2012): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.3.1.%p

Influence of Inundation Level Toward The Growth of Pedada Seedling (Sonneratia caseolaris (L.) Engler) in Mangrove Area Tol Sedyatmo Angke Kapuk, North Jakarta.Global warming that causing the melting of iceberg in the pole have an impact on rising of level sea which impact on mangrove forest ecosystems. So that, we need to know the information about species of mangroves that can be adapted to increasing sea level and also species that can support for mangrove rehabilitation. Purpose of this research is to elaborate the effect of inundation on seedling growth and determine the level of inundation that support the good seedling growth. This research used randomized block design with inundation level as a treatment. There were three treatments consisting of inundation until the limit of the root neck, inundation between ¼ stem height and ½ stem height, and inundation between ½ stem height and ¾ stem height. Mangrove species that is used in this research is 2 and 4 months years old seedling of S. caseolaris. The research results showed that the level of inundation of the root neck gives the best effect to seedling growth. However, S. caseolaris can adapt and having good growth at inundation up to ½ stem height. In general, the influence of inundation level give effect to the growth variable responses, except in height, length of internode, and height increment of seedling.

Co-Authors Ade Siti Nurjannah Aldi Perdana Wiraatmadja Andesmora, Evan Vria Andry Indrawan Anggoro, Prima Anggraeni Antika, Tiara Ardiyansyah Purnama Arin Annisa Fathia Assajad, Zacky Nurrohman Azzahra, Nabilah Putri Fatimah Basuki Wasis Cahyo Wibowo Citra Rahmatia Dadan Mulyana Dhafin Maulidiyan Dian Ariyanti Dimas Prasaja, Dimas Dina Oktavia Dwi Mairida Eddy Nurtjahya Efita Karunia Harita Eko Putranti Handayani Erfanda Irawan Ewi Irfani Faadhila, Intan Hanifa Ghvirly Ramadhani Hariadi Saputra Haryantini, Baiq Azizah Hendriyana Rachman Henti Hendalastuti Rachmat IBNUL QAYIM Idealisa Masyrafina Ihsan Noor Irdika Mansur Istomo . Jenny Rumondang Johan Ariando Rajagukguk Kurniawati - Kurniawati Kurniawati, Kurniawati - Laijanan, Theresia Avilla Madja, Muhammad Daffa Nurhadi Suryadi MARIA BINTANG Maulidil Fajri Meida Rosani Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono, Muhadiono Mulyanto, Naufal Rafa Noor Faiqoh Mardatin Noor Farikhah Haneda Nur Mufarhatun Nurheni Wijayanto Nuroh Bawaihaty Rana Rio Andhika, Rana Rio Ria Astuti Rifaldo, Akhmad Sabila, Siska Aisyah Sethyo Vieni Sari Siahaan, Lasriama Siddiq Nurkholis Siti Nahla Supriyanto Teddy Rusolono Utami, Desty Sasana Putri Weda Gelar Pananjung Yadi Setiadi Yadi Setiadi YANTO SANTOSA Yentiana, Retno Ayu Yuda Purnama Yudi Setiawan Yustika Fadilah Siregar Zahrani, Alifia Sasky

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