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DIAMETER INCREMENT OF REMNANT STANDS IN LOGGED-OVER FOREST IN PAPUA kuswandi, relawan; Nugroho, Julius Dwi
Jurnal Wasian Vol 6, No 2 (2019): Jurnal Wasian
Publisher : Balai Penelitian dan Pengembangan Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jwas.v6i2.4620

Abstract

Diameter increment is an important information used to set silvicultural prescription that plays a crucial role in sustainable forest management. Therefore, this research was aimed to analyze diameter increment of remnant stands in selectively logged forest in Papua.  The dataset was acquired from permanent sample plots in logging concessions of PT  Tunas Timber Lestari (TTL), PT  Wapoga Mutiara Timber (WMT) dan PT Manokwari Mandiri Lestari (MML). The diameter measurements were conducted annually for 6 ? 9  years on three 1 ha permanent plots. Diameter increment was calculated by measuring a gap between trees diameter in year t+1 and year t. The results showed that the average diameter increment of commercial species groups in those areas were 0.56 cm/yr, 0.59 cm/yrand 0.65 cm/yr, respectively. These increments were smaller than the increment assumption of Indonesian Selective Logging (TPTI) i.e. 1.00 cm/yr. The diameter increment distribution based on diameter classes showed different patterns among sites. The diameter increment distribution in PT MML and WMT increased with the increasing diameter, otherwise those in PT TTL tend to decrease with the increasing diameter class.Keywords: logged-over forest, species group, Papua, diameter increment
KEANEKARAGAMAN STRUKTUR TEGAKAN HUTAN ALAM BEKAS TEBANGAN BERDASARKAN BIOGEOGRAFI DI PAPUA Kuswandi, Relawan; Sadono, Ronggo; Supriyatno, Nunuk; Marsono, Djoko
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 22, No 2 (2015)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1.84 KB)

Abstract

Kegiatan penebangan berdampak pada perubahan komposisi dan struktur tegakan, penyebaran jenis pohon, kesamaan komunitas dan keragaman jenis. Penelitian ini bertujuan untuk mengetahui keragaman struktur dan komposisi tegakan pada hutan bekas tebangan berdasarkan bioregion di Papua. Hasil penelitian menunjukkan bahwa komposisi dan struktur secara ekologi berbeda yang ditunjukkan dengan nilai indeks kesamaan jenis yang rendah. Jenis-jenis penyusun tegakan pada tingkatan semai, pancang, tiang dan pohon dari tiap-tiap lokasi hampir semua berbeda. Namun ada beberapa jenis yang sama ditemui mendominasi pada lokasi PT. TTL dan PT. MML seperti Vatica rassak dan Syzygium sp. Kerapatan tegakan di PT. TTL lebih tinggi dibanding dengan kedua lokasi, sementara PT. WMT adalah lokasi dengan kerapatan tegakan paling rendah. Keragaman tegakan di PT. WMT adalah yang paling tinggi, sedangkan keragaman tegakan di PT. TTL adalah yang paling rendah.
POPULATION STRUCTURES OF FOUR TREE SPECIES IN LOGGPOPULATION STRUCTURES OF FOUR TREE SPECIES IN LOGGED-OVER TROPICAL FOREST IN SOUTH PAPUA, INDONESIA: AN INTEGRAL PROJECTION MODEL APPROACH Kuswandi, Relawan; Murdjoko, Agustinus
Indonesian Journal of Forestry Research Vol 2, No 2 (2015): Indonesian Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2015.2.2.93-102

Abstract

Selective logging has been taking place in Papua for several decades. In contrast, very little is known about the stand structure in post-logged forest.  Hence, this paper investigates stand structures in logged-over area of tropical forest in South Papua. Four species were selected in three one-hectare permanent sample plots (PSPs): Vatica rassak, Syzygium sp, Litsea timoriana and Canarium asperum.  PSPs were located in the forest concession area of PT. Tunas Sawaerma in Assiki, Boven Digul, in South Papua.  Data sets comprised measurements made in 2005 and 2012 consisting of species, diameter at breast height (DBH), mortality and number of tree of each species.  Integral Projection Models (IPMs) were developed, taking into account mortality, growth, recruitment and fecundity.  Results show the pattern of stand structures of the four species were more or less similar, i.e. more individual trees were present in the small diameter classes than in the larger diameter classes.  The general pattern of the individual distribution of the four species is the typical reverse-J shape.  Syzygium sp. has a greater number of individuals in the small diameter classes than the other three species.  Population growth rates (λ) are above one, indicating that the stand structures of the population dynamics of the four species are recuperating.  Conclusively, these results suggest that species composition and population structure in these logged-over forests are recovering increasingly.
THE EFFECT OF SILVICULTURAL TREATMENT ON STAND GROWTH OF LOGGED-OVER FOREST IN SOUTH PAPUA Kuswandi, Relawan
Indonesian Journal of Forestry Research Vol 1, No 2 (2014): Indonesian Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2014.1.2.117-126

Abstract

Forest stand structure could be used as one of the variables in deciding the possibility to harvest forest product. On logged-over forests, data and information over stand structure could become the basis for decision making for harvesting. To measure and analyze yield on logged-over forest, each forest management unit (IUPHHK) is obligated to establish Permanent Sample Plots (PSPs) for monitoring the growth and yield of the managed stand. In some of the plots, maintenances and thinning treatments are applied while other plots are not treated.  The results, after several years of observations, showed that there was a difference in stand structure (tree number) of each diameter class both in plots with treatment and without treatment. The rate of in-growth, up-growth and mortality varied between plots without and with treatment in each diameter class and length of time after harvesting. The average diameter increment of trees in the stands of the untreated plots was higher (0.60 cm yr-1) compared to the treated plots (0.55 cm yr-1).
POPULATION STRUCTURES OF FOUR TREE SPECIES IN LOGGED-OVER TROPICAL FOREST IN SOUTH PAPUA, INDONESIA: AN INTEGRAL PROJECTION MODEL APPROACH kuswandi, Relawan; Murdjoko, Agustinus
Indonesian Journal of Forestry Research Vol 2, No 2 (2015): Indonesian Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2015.2.2.93-101

Abstract

Selective logging has been taking place in Papua for several decades. In contrast, very little is known about the stand structure in post-logged forest.  Hence, this paper investigates stand structures in logged-over area of tropical forest in South Papua. Four species were selected in three one-hectare permanent sample plots (PSPs): Vatica rassak, Syzygium sp, Litsea timoriana and Canarium asperum.  PSPs were located in the forest concession area of  PT. Tunas Sawaerma in Assiki, Boven Digul, in South Papua.  Data sets comprised measurements made in 2005 and 2012 consisting of  species, diameter at breast height (DBH), mortality and number of  tree of  each species.  Integral Projection Models (IPMs) were developed, taking into account mortality, growth, recruitment and fecundity.  Results show the pattern of  stand structures of  the four species were more or less similar, i.e. more individual trees were present in the small diameter classes than in the larger diameter classes.  The general pattern of  the individual distribution of  the four species is the typical reverse-J shape.  Syzygium sp. has a greater number of  individuals in the small diameter classes than the other three species.  Population growth rates (λ) are above one, indicating that the stand structures of  the population dynamics of  the four species are recuperating.  Conclusively, these results suggest that species composition and population structure in these logged-over forests are recovering increasingly.
THE EFFECT OF SILVICULTURAL TREATMENT ON STAND GROWTH OF LOGGED-OVER FOREST IN SOUTH PAPUA Kuswandi, Relawan
Indonesian Journal of Forestry Research Vol 1, No 2 (2014): Indonesian Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2014.1.2.117-126

Abstract

Forest stand structure could be used as one of  the variables in deciding the possibility to harvest forest product. On logged-over forests, data and information over stand structure could become the basis for decision making for harvesting. To measure and analyze yield on logged-over forest, each forest management unit (IUPHHK) is obligated to establish Permanent Sample Plots (PSPs) for monitoring the growth and yield of  the managed stand. In some of  the plots, maintenances and thinning treatments are applied while other plots are not treated.  The results, after several years of  observations, showed that there was a difference in stand structure (tree number) of  each diameter class both in plots with treatment and without treatment. The rate of  in-growth, up-growth and mortality varied between plots without and with treatment in each diameter class and length of  time after harvesting. The average diameter increment of  trees in the stands of  the untreated plots was higher (0.60 cm yr-1) compared to the treated plots (0.55 cm yr-1).
MODEL PERTUMBUHAN TEGAKAN HUTAN ALAM BEKAS TEBANGAN DENGAN SISTEM TEBANG PILIH DI PAPUA Kuswandi, Relawan
Jurnal Pemuliaan Tanaman Hutan Vol 11, No 1 (2017): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (507.93 KB) | DOI: 10.20886/jpth.2017.11.1.45-56

Abstract

Sustainable forest management recently calls for growth information concerning integrated functions of ingrowth, upgrowth and mortality. This study was conducted in logging concessions of PT. Tunas Timber Lestari (TTL), PT. Wapoga Mutiara Timber (WMT) dan PT. Manokwari Mandiri Lestari (MML) in Papua. Then, this research was intended to build growth stands models in logged over forest. The data were obtained from permanent sample plots (PSPs) in three logging concession in Papua forest. Results revealed that characteristics of stand namely basal area, stem density and diameter had significant coefficients to model of ingrowth, upgrowth and mortality in each logging concession. Specifically, PT WMT showed the highest value of coefficient of determination (>80%, P<0.05). For PT MML only had significant model namely ingrowth and upgrowth model while PT TTL only shwed ingrowth model as significant equation.
Timber Volume Estimation Model for Merchantable Tree Species in Sarmi Regency, Papua Kuswandi, Relawan
Jurnal Wasian Vol 3, No 2 (2016): Jurnal Wasian
Publisher : Balai Penelitian dan Pengembangan Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jwas.v3i2.1982

Abstract

Precise forest inventory to estimate standing stock is needed in forest management planning.  Therefore, it is necessary to have proper and reliable tools in estimating merchantable timber volume. This research was intended to build an accurate model to estimate timber volume for  merchantable species in logging concession of PT Wapoga Mutiara Timber, Sarmi Regency.  Regression equation between diameter and length did not have a significant correlation (coefficient of determination, R2 = 6.7 %). The best equation to estimate table tree volume based on validation test in logging concession of PT Wapoga Mutiara Timber was Log V = - 3.34 + 2.16 log d.     
Development Strategy of Masoi (Cryptocarya massoia (Oken) Kosterm.) as Non-Timber Forest Products in Teluk Bintuni, West Papua With SWOT Analysis Hastanti, Baharinawati Wilhan; Kuswandi, Relawan; Noya, Julanda
Jurnal Wasian Vol 5, No 1 (2018): Jurnal Wasian
Publisher : Balai Penelitian dan Pengembangan Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jwas.v5i1.4202

Abstract

Non-timber forest products (NTFPs) are forest resources which have comparative advantage and in direct contact with the community. Masoi (Cryptocarya masoia) is one of mainstay Papua NTFPs. This essential oil that produced through bark distillation, used as aromatic raw materials for food, medicines, perfume,s and aromatherapy. The demands of masoi oil are high for domestic and foreign market. This study aimed to formulate development strategy of masoi as non-timber forest products in Teluk Bintuni regency, Papua Barat Province, by identifying external factors (Opportunities, threats) and internal factors (strengths, weaknesses). The research applied SWOT analysis methods by identifying external factors (EFAS) and internal factors (IFAS) as strength, weaknesses, opportunities, and threats. Based on SWOT analysis which conducted by calculate score of external factors and internal factors, the suitable strategy was WO strategy which utilized opportunities to suppress the weaknesses at third quadrant. The third quadrant tended turn around by 1). Socialization and training of masoi cultivation on indigenous people, 2). Legal Counseling to increase legal awareness of the community to overcome land disputes.Keywords: strategy, development, masoi, nontimber forest products (NTFPs), SWOT
MODEL PENGELOLAAN HASIL HUTAN KAYU OLEH MASYARAKAT ADAT: STUDI KASUS PEMILIK HAK ULAYAT DI KABUPATEN TELUK BINTUNI Kuswandi, Relawan; Sadono, Ronggo; Supriyatno, Nunuk; Marsono, Djoko
JURNAL KEHUTANAN PAPUASIA Vol 1 No 1 (2015): Jurnal Kehutanan Papuasia
Publisher : Fakultas Kehutanan UNIPA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pemanfaatan sumberdaya hutan oleh masyarakat adat pemilik hak ulayat dalam rangka peningkatan perekonomian merupakan implementasi Otonomi khusus Papua. Dengan besaran kompensasi berkisar Rp.200.000 - Rp.300.000/m3 oleh IUPHHK kepada masyarakat adat berdasarkan negosiasi. Pemanfaatan olahan kayu digunakan untuk memenuhi kebutuhan sebagai bahan bangunan oleh masyarakat. Penelitian ini bertujuan untuk mengetahui model pengelolaan hasil hutan kayu oleh masyarakat pemilik hak ulayat. Hasil penelitian menunjukkan bahwa Model pengelolaan hasil hutan kayu oleh masyarakat adat (marga Sayori) masih sangat sederhana. Keterlibatan masyarakat pemilik hak ulayat dalam proses pengolahan kayu sangat kecil, hanya terbatas pada pemberian hak pengelolaannya kepada pemilik modal. Pemilik hak ulayat hanya menerima konpensasi berdasarkan kubikasi hasil olahan kayu yang dilakukan oleh pemilik modal.