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All Journal JURNAL HUTAN LESTARI Tengkawang : Jurnal Ilmu Kehutanan
Iswan Dewantara
Fakutas Kehutanan Universitas Tanjungpura Pontianak Kalimantan Barat
Agriculture, Biological Sciences & Forestry

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PENGARUH KEWIRAUSAHAAN KORPORASI PADA KINERJA EKSPOR PABRIK CRUMB RUBBER PT. SUMBER DJANTIN PONTIANAK Dewantara, Iswan
jurnal TENGKAWANG Vol 2, No 2 (2012): Jurnal Tengkawang
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jt.v2i2.3689

Abstract

Corporate entrepreneurship is one of the main important factors that can determine the progress or decline of a company. The purpose of this study the authors do is to know about the Effect Analysis Corporate Entrepreneurship (Innovation, Proactive, and Risk) of the Export Performance Company in crumb rubber processing factory PT. Sumber Djantin Pontianak. Research methods used to assess corporate entrepreneurship developed by Covin & Slevin models with multiple linear regression analysis method. Results of multiple linear regression analysis showed that the Corporate Entrepreneurship (X) positive and significant impact on Export Performance Company (Y) on crumb rubber processing factory PT. Sumber Djantin Pontianak, the regression equation: Export Performance = -5.421 + 0.868 Innovation + 1.158 Proactive + 0.395 willingness take Risks. Recommended for future research include other relevant variables impact on the success of the company Export Performance crumb rubber processing plant. And expand the use of new theories, so that research results can be generalized. Keywords: corporate entrepreneurship, export performance, and crumb rubber factory
SEBARAN PASAK BUMI (Eurycoma longifolia Jack.) DI BERBAGAI KETINGGIAN TEMPAT PADA KAWASAN HUTAN LINDUNG GUNUNG AMBAWANG BUKIT BENDERA KECAMATAN TELUK PAKEDAI Distribution Pasak Bumi (Eurycoma Longifolia Jack.) Height In Various Places In Protected Forest Erwanto, Wahyu; Muin, Abdurrani; Dewantara, Iswan
JURNAL HUTAN LESTARI Vol 2, No 3 (2014): Jurnal Hutan Lestari
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v2i3.8172

Abstract

The purpose of this study was to determine the distribution of the pasak bumi (Eurycoma longifolia Jack.), the number of population and associations pasak bumi (Eurycoma longifolia Jack.) based on the level of 0-100 m altitude, 100 to 200 m, 200-300 m and 300 m in above sea level to the top. Vegetation analysis conducted by purposive sampling method with a single plot size of 40 mx 40 m. Distribution pasak bumi (Eurycoma longifolia Jack.) tends to experience the difference in altitude from sea level with a growing number of individuals at each altitude increment. Pasak bumi (Eurycoma longifolia Jack.) is usually found at an altitude of 300-325 m at sea level differences as much as 511 people with an index value of 128.60% critical. At an altitude of 300 m above the earth peg type is a type that is very dominant to other vegetation types. Pasak bumi (Eurycoma longifolia Jack.) At an altitude of 0-100 m above sea level associated with pasir-pasir (Stemonurus secundiflorus Blume) and gedebok, altitude 100-200 m above sea level with cempedak air (Artocarpus teysmanni), height of 200 -300 m above sea level with ilas (Parastemon urophyllum) and resak (Vatica dulitensis Sym.) and at an altitude of 300 m above sea level with ilas (Parastemon urophyllum). Keywords: Pasak Bumi (Eurycoma longifolia Jack.), the distribution based on the altitude, the association.
KEANEKARAGAMAN AVIFAUNA DIURNAL PADA KAWASAN MEMPAWAH MANGROVE PARK DAN SEKITARNYA DI DESA PASIR KABUPATEN MEMPAWAH Prabowo, Apik; Dewantara, Iswan; Prayogo, Hari
JURNAL HUTAN LESTARI Vol 7, No 1 (2019): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v7i1.31845

Abstract

Avifauna is one of the animals that is easily found in various places, and is one indicator of environmental quality. Avifauna has the ability to spread seeds, help pollinate, natural predators of other animals, and others. This study aims to record the diversity of diurnal avifauna in area Mempawah Mangrove Park and its surroundings in Pasir Village Mempawah Hilir Subdistrict, Mempawah district. The research method used the Point count method, whose observation points are obtained by Purposive sampling, carried out on 9 July-9 August 2018. The results of observations were 35 species of avifauna consisting of 24 families which were divided into three habitats, in the mangrove habitat there were 18 species and 15 families, mixed garden contained 22 species and 18 families, and rice field contained 17 species and 11 families. The dominance index in the mangrove habitat is C = 0.40, mixed garden is C = 0.10 and rice is C = 0.13, indicates that no species dominates the other species, meaning the role of the avifauna species found in all three same habitat. Diversity index shows that mixed garden habitat has a higher species diversity with () = 2.66, mangrove habitat is () = 2.43 and a rice field habitat is () = 2.40, indicates that the three habitats have diversity with moderately criteria. Evenness index in mangrove habitat is (E) = 0.84, in mixed garden habitat is (E) = 0.85 and a rice field habitat is (E) = 0.85, indicates the three habitats the abundance includes evenly distributed or included in a stable community. The highest similarity index of avifauna species is between mangrove habitat and mixed garden with a percentage of 53.58%, rice field habitat with a garden with a percentage of 53.19%, and mangrove habitat with rice fields with a percentage of 38.49%. The highest similarity was between.Keywords: Avifauna, Diversity, Mempawah Mangrove Park
KEANEKARAGAMAN KANTONG SEMAR (Nepenthes spp) PADA SEMAK BELUKAR DAN AREAL TERBUKA DI KEBUN RAYA SAMBAS KABUPATEN SAMBAS KALIMANTAN BARAT Yuniarty, Rinny; Dewantara, Iswan; Herawatiningsih, Ratna
JURNAL HUTAN LESTARI Vol 8, No 1 (2020): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v8i1.39388

Abstract

Sambas Botanical Garden is a conservation forest area that has a high diversity of flora and one of them is the Kantong Semar (Nepenthes spp). Research aims; (1) conducting a study of the species diversity of Kantong Semar (Nepenthes spp) in shrubs and open areas in the Sambas Botanical Garden, (2) Study to changes in the composition of Kantong Semar species (Nepenthes spp) in Sambas Botanical Garden, (3) determining species composition and dominant of kantong semar (Nepenthes spp) that grows in shrubs and open areas. This research was conducted by a survey method in which the laying of observation plots by purposive sampling. The results of the study showed that the species diversity of Kantong Semar (Nepenthes spp) in the Sambas Botanical Garden was a low category with a value of 0.254 in shrubs and an open area of 0.01756. There was a change in the composition of the Kantong Semar species after two years of previous research. The change occurred where two new species of N. xneglecta and N.gracilis Korth that grown in Sambas Botanical Garden. Based on the results of morphological analysis, we found as many as 5 species of Kantong Semar consisting of N. mirabilis (Lour) Druce, N.gracilis Korth, N.ampullaria Jack, N. xneglecta, N. xhookeriana, which grow in shrubs, and N. mirabilis (Lour) in open area. The results of the analysis of the Importance Value Index (INP) that dominant species are N.ampullaria Jack with a value of 107.02 and N. xhookeriana 33.32 where both species of Kantong Semar grown in the shrub area.Keywords: Kantong semar (Nepenthes spp), shrubs and open area, Species diversity.
ANALISIS POHON PENGHASIL BUAH-BUAHAN HUTAN YANG TERDAPAT DI HUTAN ALAM KANTUK KECAMATAN SEPAUK KABUPATEN SINTANG Mariana, Nita; Dewantara, Iswan; Mariani, Yeni
JURNAL HUTAN LESTARI Vol 1, No 3 (2013): Jurnal Hutan Lestari
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v1i3.4122

Abstract

Plants producing forest fruits is one of the natural resources that has an important role of forest communities the suply, including the kind of fruit that has been used by people around the forest for food and other necessities . This study aims is to determine the diversity of fruits -producing trees that can be consumed by the forest around the District Nature Forest Kantuk Sub District Sepauk District Sintang . The method used is the method of combination of method and line method checkered path. 4 lines of observation , length 500 m , width of lanes and 20 x 20 m , 200 m spacing between lines . Observation plots measuring 10 x 10 m for poles and 20 x 20 m for tree level . The results found that the overall number of poles 57 vegetation types and levels of 58 types of trees . Fruit -producing trees for poles 21 forest types and levels of 19 species of trees The highest of Important Value Index (IVI) of overall vegetation at level poles and tree is derived from Purang (Macaraga sp) and Perepat (Sonneratia alba JB Sn) respectively are 28.7218%; 45.8161%. While the highest of Important Value Indeks (IVI) for Fruits producing free at poles and tree is derived from Tengkawang (Shorea sp) that are 69.5018; 100.9681%. and for fruit tree in poles and tree level are 0.8987 and 0.8464. Keywords : Trees , Fruits , Natural Forests , Important Value Index, species diversity
STUDI HABITAT DAN JENIS PAKAN BADAK SUMATERA (DICERORHINUS SUMATRENSIS) DI KUTAI BARAT DAN MAHAKAM ULU KALIMANTAN TIMUR Muslim, Ahmad; Nurdjali, Bachrun; Dewantara, Iswan
JURNAL HUTAN LESTARI Vol 3, No 4 (2015): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v3i4.14205

Abstract

The Sumatran rhinos (Dicerorhinus sumatrensis) is the smallest and be the most primitive of the five species of rhinoceros that still alive. In the 1990s the status of the Sumatran rhinos population in East Kalimantan never again recorded scientifically (Meijaard, 1996). In 2013 a team of WWF-Indonesia Kutai Barat find any sign of the rhinos that is supported by the findings of the trail and a video camera recording automatically. The study aims is to determine the type of vegetation as a feed resources in the trajectory path and to determine the condition of the Sumatran rhinos habitat (Dicerorhinus sumatrensis) in Kutai West and East Kalimantan's Mahakam Ulu. This study used a double plot irregularly conducted by purposive. The results to showed level of habitat suitability between zone 1 and zone 3 has a composition of the same type, that is 70.270% with 48 types of vegetation found in which 32 species a feed of Sumatran Rhinos (Dicerorhinus sumatrensis). Keywords :Feed, habitat, Sumatran rhino ( Dicerorhinus sumatrensis ).
JUMLAH TEMPAT PENELURAN PENYU HIJAU (Chelonia mydas) BERDASARKAN VEGETASI PANTAI DI TAMAN WISATA ALAM (TWA) TANJUNG BELIMBING KECAMATAN PALOH KABUPATEN SAMBAS Kurniawan, Wawan; Erianto, Erianto; Dewantara, Iswan
JURNAL HUTAN LESTARI Vol 8, No 3 (2020): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v8i3.42312

Abstract

The decline in the population of green sea turtles (Chelonia mydas) occurs continuously due to the destruction of the nesting beach habitat, therefore efforts are needed to increase the green sea turtle population by rearranging nesting sites. One thing that is considered important from the green sea turtle nesting habitat is the coastal vegetation. This research was conducted in Tanjung Belimbing Nature Tourism Park, Sambas Regency, West Kalimantan Province. This study aims to obtain information on vegetation conditions that are preferred by green sea turtles to lay eggs through the number of nesting sites approach. The method used is a survey method. Data collection was carried out by direct observation in the field. In this study, 12 nesting sites were found spread over four observation sites, with the highest number of nesting site found at observation location 1 as many as 8 nesting sites. At observation location 1, besides cemara laut (Casuarina equisetifolia) and pandan laut (Pandanus tectorius) also found waru (Hibiscus tiliaceus) and api-api (Avicennia sp) as well as shrub plants such as kamboja laut (Scaevola taccada), serunai laut (Melanthera biflora) ) and herbal plants such as tapak kuda (Ipomoea pes-caprae), alaban tanah (Vitex rotundifolia), rumput tembaga (Ischaemum muticum), bayam berduri (Amaranthus sp) and bakung laut (Crynum asiaticum L).Keywords: Nesting Sites, Vegetation, Green sea turtle, Tanjung Belimbing Nature Tourism Park
KEANEKARAGAMAN JENIS TEGAKAN HUTAN TEMBAWANG DI DESA SEHE LUSUR KECAMATAN KUALA BEHE KABUPATEN LANDAK Septiawan, Safri; Lumangkun, Agustine; Dewantara, Iswan
JURNAL HUTAN LESTARI Vol 5, No 3 (2017): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v5i3.21704

Abstract

Tembawang is a form of management area conducted by Dayak tribe community in West Kalimantan. By the aspect of local wisdom, tembawang is a tribute, moral ethics of ancestral values, inheritance of ownership to its descendants, and as knowledge in understanding the types of trees which is used as a reference of ownership if the original tree die, as economic aspect, tembawang is a source of community nutrition but its utilization is limited to house hold consumption and the economic value is relatively smaller. The forming of tembawang is done after farmers have shifting cultivation, where before leaving their former land they planted various kinds of timbers, fruits, sap, and spices as medicinal plants. Information on the diversity of tembawang timber stands has not been widely known yet. The research aims to obtain information about the diversity of tembawang timber standing stock and the dominant tree species in the Village of Sehe Lusur Sub District of Kuala Behe District of Landak. The research was conducted in the Village of Sehe Lusur Sub District of Kuala Behe District of Landak for ± 4 weeks, from August 2016 until done. Data collection in the field using mixed method of transect and line plots by census in three different tembawang namely Nanga Ngundul, Sungai Babi, and Nanga Ngasap. The research result shows that stands are found for all growth rates of 34 species. The most dominant number with the highest INP value of the seedling level is Kelampai (Elateriospermum tapos), the largest sapling is Durian (Durio zibethinus), stands whose in medium pole are Melaban (Vitex pinnata), and the stands classified as tree is Krikik.Keywords: Biodiversity, Desa Sehe Lusur, Forest, Stand, Tembawang.
IDENTIFIKASI JENIS TENGKAWANG (Shorea spp) SEBAGAI PEWARNA ALAMI TENUN IKAT KABUPATEN KAPUAS HULU KALIMANTAN BARAT Eni, Anggelia; Dewantara, Iswan; Sisillia, Lolyta
JURNAL HUTAN LESTARI Vol 6, No 1 (2018): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v6i1.23731

Abstract

Tengkawang (Shorea spp) is one type of forestry plant that grows in tropical rain forest. The existence of tengkawang in its natural habitat is now beginning to decrease and hard to find. Communities in Tekalong Village Lanjak Deras Village Batang Lupar Sub-district, Kapuas Hulu Regency utilizes tengkawang (Shorea spp) as a natural dye ikat. Tengkawang leaf in traditional though to produce a dye that is on the stew. This study aims to obtain data on identification and describe the characteristics of morphology tengkawang (Shorea spp), and to know the utilization of tengkawang (Shorea spp) by the community in Tekalong Village. The results of identification found 2 types of tengkawang is Shorea macrophylla 49 stem dan Shorea splendida 13 stem, Part of tengkawang that is used by the community as a natural dye that is old leaf.Keywords: identification, natural dyes, Tengkawang (Shorea spp) weaving ikat.
KEMAMPUAN EMPAT JENIS TANAMAN DALAM MENYERAP CEMARAN MERKURI DI MEDIA TAILING Linda, Mardekawati; hanudin, Bur; Iswan, Dewantara
JURNAL HUTAN LESTARI Vol 1, No 2 (2013): Jurnal Hutan Lestari
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v1i2.1582

Abstract

This study aims to determine the level of absorption mercury contamination in plants and would like to know which plants are best at absorbing mercury contamination in tailings. plants used were Casuarina junghuniana, Cinnamomum porrectum (Roxb.), Melastoma affine and Dillenia suffruticosa Griff ex Hook. This study uses RCD (randomized completely design) with 8 treatments on plants and each treatment was repeated 5 times. The analysis showed that the Casuarina junghuniana, Cinnamomum porrectum (Roxb.), Melastoma affine and Dillenia suffruticosa Griff ex Hook has the ability to absorb mercury contamination in tailing and the tolerance to mercury contamination. The results showed that the higher the growth rate, the higher the mercury is absorbed in plant tissues. The best types of plants to absorb mercury contamination is Melastoma affine and Dillenia suffruticosa Griff ex Hook because this plant is a plant that tolerance and is a pioneer plant that can grow in soil that has a low nutrient content, has rapid growth and are able to grow in the open and logged over . The analysis showed that the levels of mercury in the tissues of plants and media higher than 0.02 ppm. However, the levels of mercury in the media on the treatment of P3, P5, P6, and P7 contains mercury <0.02 ppm. Keywords : Casuarina junghuniana, Cinnamomum porrectum (Roxb.), Melastoma affine and Dillenia suffruticosa Griff ex Hook, Phytoremediation and Tailings.
Co-Authors . Burhanuddin A F Tanjung Abdurrani Muin Adriana Yunita Ahmad Muslim ahmad yani Al bertus, Al Arrafi Nursyahdi Augustine Lumangkun Ayu Wahyuni Bachrun Nurdjali Bibiana Ating Andewi Budiyana, . Bur hanuddin Bur hanudin Cassanova, Kresna Destiana, Destiana Dewi Kurniasih Dora, Dora Dwi Astiani Dwi Yoga Budi Pranoto Elok Susilawati Emi Roslinda Eni, Anggelia Erianto Erianto Erianto, . Erianto, . Fachrudin, Abang Fernandi, Gregoius Florensius, Marselinus Gusti Hardiansyah Hafiz Ardian Hairunnsisah, . Hapzi Ali Hari Prayogo Hariska, Hariska Harmoko, Eko Puji Haryono, Zuhry Hasan Ashari Oramahi Herlina Darwati Ibab, Sumiati Iskandar A M Iskandar A M Jannah, Farida Nurul Jawek, Asmanto Juita, Sumyndra Kalsum, Emilya Karmelitha, Yolanda Lestari, Andriyani Limpa, Octavianus Linoria, Rose Merry Melawati Lolyta Sisillia Luh Putu Ratna Sundari Lumangkun, Agustine manurung, kartika chandra Mardekawati Linda Margawuk, Maulidya Marissa, Dila Marwanto Marwanto Mohammad Taufiq Hidayat Muflihati, . Muhammad Irfan Nita Mariana Nur Rizkiyah Oktebriyani, Putri Nurul Prabowo, Apik Pranoto, Dwi Yoga B Purbowo, Satriyo DS Putra, Diki Heryanto Ratna Herawatiningsih Rawani, Muhammad Dandi Riya, Riya Rosa, Nandini Safitri, Melia Sarma Siahaan Satri Lestari Septi Damiska Septiawan, Safri Setiawan, David Agus Simaremare, Emika Siti Masitoh Kartikawati Sofyan Zainal Sofyan Zainal Sulistiawati, Nanda Taufik, Nur Mohammad Trecyana, Lana Ulandari, Sari Wahyu Erwanto Widhanarto Oki Ganjar Winnugroho Wiratman, Manfaluthy Hakim, Tiara Aninditha, Aru W. Sudoyo, Joedo Prihartono Yeni Mariani Yuniarty, Rinny Zainudin Zainudin Zuhry Haryono