YANTO SANTOSA
2Department of Forest Resources Conservation and Ecotourism, Faculty of Forestry, Bogor Agricultural University, Darmaga Campus, Bogor 16680, Indonesia

Published : 49 Documents
Articles

STUDI POPULASI DAN POLA PENGGUNAAN RUANG MONYET EKOR PANJANG (MACACA FASCICULARIS) DI HUTAN PENDIDIKAN GUNUNG WALAT Santosa, Yanto; Hidayat, Andoko; Mustari, Abdul Haris
Media Konservasi Vol 18 No 1 (2013): Media Konservasi Vol. 18 No. 1 April 2013
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.801 KB) | DOI: 10.29244/medkon.18.1.%p

Abstract

Long-tailed macaque (Macaca fascicularis Raffles 1821) in Gunung Walat University Forest (HPGW) was introduced in 1980/1981. Thirty years post-introduction, there was no any research on the species. The objectives of the research were to estimate demographic parameters and home range of long-tailed macaque in HPGW. This research was conducted from March to May 2012. These data were collected using concentration count method based on sex and age structure. Composition and structure of vegetations analyzed using line-plot sampling method. The groups movement of the long-tailed macaque were recorded using GPS and analyzed using maximum convex polygon. Four groups of long-tailed macaque were observed in HPGW. Population size were 108 individual and group sizes were 30, 23, 24, 31 respectively. Population density were 0,3 per Ha, natality was 0,24, mortality juvenile to sub adult was 0,64 and mortality sub adult to adult was 0,30. Population of macaque groups indicated progressive population based on age structure. Homerange of the groups were 29,26 Ha;  19,73 Ha; 26,94 Ha and 15,78 Ha for group A, B, C, D respectively. Dominant factors of habitat of the long-tailed macaque were elevation (X1), temperature (X2) and moisture (X3). Based on the dominant factor of the habitat, the result from multiple linear regression was Y=-30,964+0,028X1+0,675X2+0,317X3, where Y=size group, R2=75,3%. Key words: long-tailed macaque, demographic parameters, population, home range, Gunung Walat Education Forest
ANALISIS FAKTOR EKOLOGI DOMINAN PEMILIHAN KUBANGAN OLEH BADAK JAWA (RHINOCEROS SONDAICUS DESMAREST 1822) DI TAMAN NASIONAL UJUNG KULON Santosa, Yanto; Wulan, Cory; Hikmat, Agus
Media Konservasi Vol 15 No 2 (2010): Media Konservasi Vol. 15 Nomor 2, Agustus 2010
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (508.788 KB) | DOI: 10.29244/medkon.15.2.%p

Abstract

The characteristic of  wallow can be one of standard or criteria of the javan rhino habitat which will be used for selection strategy of further javan rhino?s wallow. The objective of this study is to identify the wallow characteristic of javan rhino both physical and biological factors that need for identifiying the dominant ecological factor in determining wallow selection strategy for javan rhino. The data that were collected consisted of physical characteristic javan rhino?s wallow i.e. the length and the width of wallow, the depth of mud and water of wallow, water pH inside the wallow, the height of wallow site, the temperature and humidity, and the distance from wallow to the coastal, river, and from human access. The biotic characteristic aspects of javan rhino? wallow that were observed consisted of  the number of javan rhino? feed and the total density of vegetation spread around the wallow according to result of vegetation analysis. Based on the result  of factor analysis, the dominant ecological factor that affect wallow selection are the height of the site (10-87 mdpl), air temperature (26-29°C), and tree density (25-174 ind/ha). Keywords :  Javan Rhinoceros, wallow, dominant ecological factor.
INDEPENDENT SMALLHOLDER OIL PALM EXPANSION AND ITS IMPACT ON DEFORESTATION: CASE STUDY IN KAMPAR DISTRICT, RIAU PROVINCE, INDONESIA Erniwati, Erniwati; Zuhud, Ervizal AM.; Anas, Iswandi; Sunkar, Arzyana; Santosa, Yanto
Jurnal Manajemen Hutan Tropika Vol. 23 No. 3 (2017)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Independent smallholders who manage their own oil palm plantations without receiving technical assistance and agricultural inputs from oil palm estates or government have been  increasing rapidly in Indonesia in recent years. However the magnitude of their impacts on tropical forest deforestation remains largely unevaluated.  The objective  of this study was  to explore the history of land use, and the changes in land cover and status since the onset  of  oil palm plantation activities. The study was conducted from March to April 2016. Surveys  were carried out in 30 ha of independent smallholder oil palm in  Kampar District, Riau Province.  To identify the land status, the Agreed functional forest classification (TGHK) and Provincial land use planning (RTRWP) maps were overlaid on images of the area of independent smallholder oil palm. Landsat images three years before oil palm was established were used to assess forest cover changes.  Furthermore, oil palm smallholders and elders of the local community in the research area  were  interviewed to identify land use prior to oil palm.  Our results showed that, based on land  status, 47% of  the area of independent smallholders? oil palm derived from logged forest; that is the land  changed in status from forest to oil palm plantation.  The other 53% of oil palm area derived from non-forested land. The land use history before the establishment of independent smallholder oil palm mostly comprised general-purpose field activities and former forest-felling (forest concessions). The land cover  before conversion into oil palm comprised rubber plantation, secondary forest, and shrub cover. From the results of our survey, we conclude that most of the oil palm plantations planted between  1990 and 2002 have their origins not in primary forest, but rather in  degraded secondary forest, former fields, and shrub-land. These results imply that conversion of forest area into oil palm plantations is not the direct cause of deforestation in the tropical forests of Kampar, Riau Province.
KEANEKARAGAMAN SPESIES TUMBUHAN DI AREALNILAI KONSERVASI TINGGI (NKT) PERKEBUNAN KELAPA SAWIT PROVINSI RIAU Nahlunnisa, Hafizah; Zuhud, Ervizal A.M.; Santosa, Yanto
Media Konservasi Vol. 21 No. 1 (2016): Media Konservasi Vol. 21 No. 1 April 2016
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.902 KB) | DOI: 10.29244/medkon.21.1.91-98

Abstract

Palm oil plantation is important role of increased economic in Indonesia. Beside of that, the exsistence of palm oil plantation has negative effect in ecology, that is decreasead of plant diversity. The area of high conservation value (HCV) is an effort to reducing the negative impact of oil palm plantation. The purpose of this study is to identify the level of diversity of plant species and forms of community interaction in the area of HCV. It is can used to basic of management of HCV areas that can be exploited in a sustainable manner. Data collected in the three palm oil companies in Riau Province that PTPN V, PT Mitra Unggul Pusaka (MUP), and PT Ivomas Tunggal on March till April 2016. The data collection was using a single plot and interviews. Data were analyzed using Margalef diversity index, Shannon wiener index, Evenness index, and descriptive analysis. The result showed that the level of diversity of plant species in HCV in each company is different. The highest value of plant based species richness Margalef index is PTPN V (16,836), while the value of the highest plant species diversity by Shannon wiener index is PT MUP (3,773). The highest value by evenness index is PT MUP (0,901).Community interaction that occurs in the region of HCV is utilization such as animal feed, food plants, firewood, and the honey-producing trees.Keywords: diversity of species,interaction, oil palm plantations, plants
STUDI KARAKTERISTIK KUBANGAN BADAK JAWA (RHINOCEROS SONDAICUS DESMAREST 1822) DI TAMAN NASIONAL UJUNG KULON Santosa, Yanto; Wulan, Cory; Hikmat, Agus
Media Konservasi Vol 15 No 1 (2010): Media Konservasi Vol. 15 No. 1 April 2010
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (376.987 KB) | DOI: 10.29244/medkon.15.1.%p

Abstract

The characteristic of  wallow can be one of standard or criteria of the javan rhino habitat that need for creating the second habitat which will be used for selection strategy of further javan rhino?s wallow. The objective of this study is to identify the wallow characteristic of javan rhino. The results of this study is hopefully used for the consideration in determining the second habitat of java rhino and for the basics information of habitat development of javan rhino insitu conservation. The data that were collected consisted of physical characteristic javan rhino?s wallow i.e. the length and the width of wallow, the depth of mud and water of wallow, water pH inside the wallow, the height of wallow site, the temperature and humidity, and the distance from wallow to the coastal, river, and from human access. Keywords :  Javan Rhinoceros, wallow, second habitat.
PERILAKU BERKUBANG BADAK JAWA [RHINOCEROS SONDAICUS] DI TAMAN NASIONAL UJUNG KULON Siterus, Nicanor J.V.; Santosa, Yanto; Mustrai, Abdul Haris
Media Konservasi Vol 15 No 2 (2010): Media Konservasi Vol. 15 Nomor 2, Agustus 2010
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (224.389 KB) | DOI: 10.29244/medkon.15.2.%p

Abstract

As one of the very rare and critically endangered species, Javan rhinoceros currently has a population of around 40-50 heads and can only be found in Ujung Kulon National Park. However, these numbers are still questionable due to the lack of description provided by the existing methods in estimating the entire population of Javan rhinoceros in the Ujung Kulon peninsula. The Javan rhinoceros timid nature, high alertness, and tendency to avoid direct contact with human and other wildlife are the factors that complicate the estimation of population. These factors make the Javan rhinoceros difficult to find and to track. One method that can be used is the video trap data analysis method. The objective of  this research was to obtain information on the time and duration of Javan rhinoceros wallowing activities, the patterns and mechanisms of Javan rhinoceros wallowing activities, and the types of activity of Javan rhinoceros during wallowing. Keywords :  Javan rhinoceros, wallowing behavior
PREFERENSI DAN PENDUGAAN PRODUKTIVITAS PAKAN ALAMI POPULASI GAJAH SUMATERA (ELEPHAS MAXIMUS SUMATRANUS TEMMICK, 1847) DI HUTAN PRODUKSI KHUSUS (HPKH) PUSAT LATIHAN GAJAH (PLG) SEBELAT, BENGKULU UTARA Santosa, Yanto; ., Supartono; Thohari, Machmud
Media Konservasi Vol 16 No 3 (2011): Media Konservasi Vol. 16 Nomor 3, Desember 2011
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (424.34 KB) | DOI: 10.29244/medkon.16.3.%p

Abstract

The isolation of habitat, shrinking of natural habitat and diminishing of habitat quality have increased conflicts between man and elephant to utilize space and abundance of food.  This research was carried out from April to June 2007 in Seblat Training Centre for Elephants. The objectives of this research were to recognize the potential of food plants for the elephants, the productivity of food plants, types and parts of food plants favoured by the elephants, and preferential of specific food plants and feeding behaviour. The analysis was conducted by means of vegetation analysis, through cutting and pruning parts of feeding plants, studying them and running statistical procedures to acquire conclusions about the food plant species.  The analysis was followed by observing the feeding behaviour of the elephants on foot. Ground plant species which were potential as elephants? feed comprised of 36 species, 29 spesies at seedling level, 26 species at sapling level, 24 species at pole level and 29 species at tree level. The highest productivity for sapling and pole levels are Leea indica and for seedling level is Gigantochloa cf. atroviolacea. The feeding plants of elephants comprises of 245 species from which 11 parts of the plants preferred by the elephants. Gigantochloa cf. atroviolacea and Stachyphrynium sp were the most favored plant species, indicated by the highest preferential index. The feeding behaviour of elephants could be categoried into 8 categories. Keywords: Sumatran elephant, Seblat Training Center of Elephants, preferential, productivity.
SPATIAL DISTRIBUTION PATTERN OF TARSIUS LARIANG IN LORE LINDU NATIONAL PARK Rosyid, Abdul; Santosa, Yanto; Jaya, I Nengah Surati; Bismark, M.; Kartono, Agus P.
Indonesian Journal of Electrical Engineering and Computer Science Vol 13, No 2: February 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v13.i2.pp606-614

Abstract

Tarsius lariang (T. lariang) is an endemic species in Lore Lindu National Park (LLNP). Available information regarding T. lariang is limited to only morphological, anatomical, cytogenetic, and voices issues. Knowledge for its geospatial characteristics such as spatial preferences and spatial distribution is rare. The main objective of this study is to identify the spatial distribution pattern of T. lariang in LLNP. An additional objective is to identify the environmental factors affecting its spatial distribution patterns. Field observation for distribution pattern was done at the observation plot that were using systematic sampling with random start. Furthermore, the density estimation in each point was calculated using Triangle Count and Concentration Count method, while insect abundance was estimated using light traps sample data. Finally, spatial pattern was estimated using nearest neighbor index, while the environmental affecting factors were identified by using spatial analysis and correlation analyses. From 45 observation points, the T. lariang distribution pattern was clumped. It is also recognized that the significant factors affecting the spatial distribution were insect abundance, proximity from the commercially utilized land, and land surface temperature. 
PENDUGAAN PARAMETER DEMOGRAFI DAN MODEL PERTUMBUHAN MONYET EKOR PANJANG (MACACA FASCICULARIS) DI PULAU PEUCANG, TAMAN NASIONAL UJUNG KULON Sampurna, Budi; Santosa, Yanto; Rahmat, U Mamat
Media Konservasi Vol 19 No 2 (2014): Vol 19, No.2 2014, Media Konservasi
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (657.494 KB) | DOI: 10.29244/medkon.19.2.%p

Abstract

Long tailed macaqueis one of the prospective species in international trade and still facing seriously threatened due to high demand for exporting purposes.The research was aimed at the estimation of demographic parameter and  population growth model.The inventory was conducted using sensus method by concentration point Analyses were conducted on demography parameter (size and density, sex ratio,natality and mortality),  and population growth model estimation. The result showed that long-tailed macaque in Peucang island, Ujung Kulon National Park (UKNP) had total population size 82 individuals, was found in 4 groups of Macaca. Population size in general was between 9 ? 42 individuals/group. The age structure of the populazioln was  progressive population  with global sex ratio of 1 : 1,2. The life-span of long tailed macaque  is beetween 0,6-0,86 depend on age structure and the general fecundity figures throughout this locationis 0.23. Fecundity ratein this research was obtained by dividing the number of individuals existing infants and compared with the individual number of productive females. The growth model of long-tailed macaquein Peucang Island was growth model adrift age. Keywords : Demographic parameter,Growth Model, Long-tailed macaque, Spatial distribution,Ujung Kulon National Park (UKNP).
PENDUGAAN PRODUKSI JERNANG (DAEMONOROPS DIDYMOPHYLLA BECC.) BERDASARKAN KARAKTERISTIK MORFOMETRIK ROTAN Sari, Rina Wulan; Hikmat, Agus; Santosa, Yanto
Media Konservasi Vol 20 No 2 (2015)
Publisher : Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (775.071 KB) | DOI: 10.29244/medkon.20.2.%p

Abstract

Dragon?s blood is pure powder that resulted from extraction of rattan fruit skin of genus Daemonorops. This study aimed to determine the morphometric variables were correlated with the production of rattan dragon?s blood and to formulate a mathematical model to predict the production of dragon?s blood according to correlate variables. This research was conducted in the village of Bukit Mangkekal Gedung Sako  Kaur District Bengkulu Province and 35 samples were used by measuring the rattan clumps morphometric parameters (length of rattan stems, diameter of stem, and number of panicles) at 43 rattan sticks. The results of statistical analysis (multiple linear regression with stepwise method) the correlation between the average length of bunches weight pure powder obtained regression equation for pure powder weight Y= -0.251 + 0.087x. (R2=0.873). Morphologically size in this case was the average length of bunches generative growth are easily observable and was a parameter determining the amount of fruit and pure powder produced from rattan stick. Morphometric parameters used were part of the plant that is easy to take measurements and an important part in determining the production of fruit and a pure powder using morphometric methods. Keyword: Dragon?s blood, morphometric, production model