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Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Papua Jalan Gunung Salju Amban, Manokwari 98314
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Jurnal Natural
Published by Universitas Papua
ISSN : 14121328     EISSN : 2746427X     DOI : -
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Chemistry Mathematics Physics
Jurnal Natural merupakan jurnal ilmu-ilmu matematika dan pengetahuan alam (basic science) untuk bidang: matematika, kimia, statistika, biologi, dan fisika termasuk ilmu terapan yang terkait seperti bioteknologi, kimia pangan, keanekaragaman hayati, dan lain-lain.
Arjuna Subject : Umum - Umum
Articles 145 Documents
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KAJIAN METODE FUZZY K-RATAAN DAN FUZZY K-MEDOIDS (STUDI KASUS: PENGELOMPOKAN DESA DI KABUPATEN SORONG TAHUN 2016 BERDASARKAN STATUS KETERTINGGALAN) Indah Ratih Anggriyani; Dariani Matualage; Esther Ria Matulessy
Jurnal Natural Vol. 14 No. 1 (2018)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v14i1.3

Abstract

The developments research in the cluster analysis using the fuzzy method. The fuzzy method allocates to each group with membership value located at interval [0, 1], showing the magnitude of the possibility of an object being a member into a particular group. Outlier in data very important known before grouping, because affect the final result. Grouping by using the mean value as the center of the group will be more sensitive than using the median value, so this research applies fuzzy c-means and fuzzy c-medoid method to the grouping of villages in Sorong Regency Year 2016 based on the underdevelopment status and examine the goodness of both methods. There are 23.2% of villages that do not change when done grouping with both methods. Overall average distance of group center object and varians in the resulting group the two methods are the same, the varins between groups of fuzzy c-means is greater than the fuzzy c-medoid method.
PENENTUAN KEDALAMAN SUMUR BOR BERDASARKAN DATA GEOLISTRIK RESISTIVITAS DI BEBERAPA KAMPUNG DI KABUPATEN FAK-FAK Khristian Enggar Pamuji
Jurnal Natural Vol. 14 No. 1 (2018)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v14i1.11

Abstract

Geoelectrical Resistivity method is a geophysical method that can be used to determine subsurface geology based on rock resistivity image. Resistivity survey has been done in some villages, in Fak Fak Regency, West Papua Province. The measurement method that used is sounding, whereas electrode configuration used is Dipole-dipole configuration with a stretch of 100 -150 m. The data obtained are then processed by Progress Res2Dinv. The results of this survey obtained show that in the resistivity sounding measurement point found any good groundwater aquifers, as the water source of drilled well. Water layer with the thickness between 1-3 m at the surface (alluvial) is a rain water infiltration that is not recommended to make boreholes at this point.
IDENTIFIKASI JENIS VEGETASI DOMINAN DI AREAL BEKAS KEBUN DAN KEBUN DI KAMPUNG AYAMBORI MANOKWARI (Identifying Dominant Vegetation In The Plantation Area And Former Farmland As The Indicator Of Soil Fertality At Ayambori Village – Manokwari) Heru Joko Budirianto
Jurnal Natural Vol. 14 No. 1 (2018)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v14i1.12

Abstract

The purpose of this study is to identify types of dominant vegetations in the plantation area and former farmland as indicator of soil fertility. Vegetation plays an important role to provide soil fertilities. Certain types, growing in the former farmland can possibly indicate soil fertilities both in the plantation area and former farmland. Aspect of the fertilities likely influences number of vegetative types and diversity of species. Measured vegetation is used to comparing species composition and its diversities. The former plantation that is taken up as sample has been used for 5 year. Identification of the type was carried out by using vegetative analysis. The valuable index was calculated to determine extensively the role of the dominant types from seeding and wooded phase. There are four different plot sizes. 20x20 meter is utilized purposively for wooded phase, 10x10 meter is pole, 5x5 is used as stake phase and 2x2 meter is made for seeding phase. The species which has important role for the soil fertilities are indentified through exploring various references and the result of interview from local society The finding reveals that vegetative composition in the former farmland which has been used for 5 year consists of three phases, including seeding, stake and pole. Totally, the types are 30 species under each phase. 23 types are in the seeding, 19 types contribute for pole and 6 types are resulted in the wooded phase. The dominant type of seedling phase is Lunasia amara, Piper aduncum is gotten in the stake phase, and the pole one is Mallotus philippensis. However, differently the plantation area carried out 39 species in the seeding phase, sapling phases has 36 species, pole phase carries out 16 species and 17 species is in the wooden phase. The dominant types is in the seeding and stake phase is Nephelium lappaceum, Lansium domesticum is pole phase, and Durio zibenthinus is resulted in the wooded phase
PLASMODIUM DOMINAN DALAM NYAMUK ANOPHELES BETINA (Anopheles spp.) PADA BEBERAPA TEMPAT DI DISTRIK MANOKWARI BARAT Rina A. Mogea
Jurnal Natural Vol. 14 No. 1 (2018)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v14i1.13

Abstract

Malaria contagious by mosquito Anopheles Betina bringing protozoa parasite in its body (Plasmodium). Plasmodium there are four specieses that is Plasmodium vivax, Plasmodium ovale, Plasmodium malariae and Plasmodium falciparum, but often becomes pathogen that is Plasmodium vivax and Plasmodium falciparum. As for intention of this research is to identify Plasmodium which is dominant at female Anopheles mosquito (Anopheles spp.) and knows distribution pattern of female Anopheles mosquito (Anopheles spp.) in some places in Districts Manokwari Barat. Based on research result done to four locations that is area Amban, Wosi, Sanggeng and Kota is found [by] 1024 mosquito tails. From the amounts only 115 mosquito tails was mosquito Anopheles Betina while the other is mosquito Anopheles male, mosquito Culex and Aedes. Mosquito Anopheles Betina found consisted of 4 species that is Anopheles bancrofti, Anopheles kochi, Anopheles farauti and Anopheles koliensis. Mosquito Anopheles Betina which is dissected, obtained 2 the Plasmodium species in mosquito spit gland is Plasmodium vivax and Plasmodium falciparum, and from calculation by index dominant can be told that both types of this very dominant Plasmodium in Districts Manokwari Barat because its the dominant index > 5%.
PENERAPAN ANALISIS GEROMBOL DAN BIPLOT (STUDI KASUS: HASIL PERTANIAN DAERAH TERTINGGAL DI PROVINSI PAPUA BARAT) Indah Ratih Anggriyani; Dariani Matualage; Esther Ria Matulessy
Jurnal Natural Vol. 14 No. 1 (2018)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v14i1.14

Abstract

One of the potential of the seven districts underdeveloped areas in West Papua Province is agriculture. In order to develop agricultural potential, an overview of agricultural products is needed including the similarity of regional characteristics and the relative position of the region. The similarity of regional characteristics to agricultural product can be known by cluster analysis. The relative posistion of the area with agricultural results is known by biplot analysis. Bintuni Bay Regency, South Sorong Regency, Tambrauw Regency and Maybrat Regency have the same characteristics in producing agriculture while Teluk Wondama Regency, Sorong Regency and Raja Ampat Regency have different characteristics. The relative position of agricultural products with the regency is Sorong Regency producing the highest number of food crops while the largest producer of horticulture fruits and vegetables are Teluk Wondama Regency and Raja Ampat Regency.
KAJIAN POTENSI PEMBENTUKAN AIR ASAM TAMBANG DARI TANAH LAPISAN PENUTUP BATUBARA ASAL KABUPATEN TELUK BINTUNI Markus Heryanto Langsa
Jurnal Natural Vol. 14 No. 1 (2018)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v14i1.15

Abstract

Acid mine drainage is formed when certain sulfide minerals in rocks are exposed to oxidizing. Upon exposure to oxidizing conditions, these sulfide minerals are oxidized in the presence of water and oxygen to form highly acidic, sulfate-rich drainage. Acidity levels, and metal composition and concentration depend on the type and amount of sulfide mineral and the presence or absence of alkaline materials. If acid mine drainage has formed, it will be very difficult to stop the process as it is a continuous process until one of the reactions runs out. Acidic water containing heavy metals when flowing into rivers, loker or swamps will damage the condition of the ecosystem in the river. This will certainly cause a decrease in water quality. The purpose of this study is to examine the potential for the formation of acid mine drainage based on the acid base balance method. The results obtained in samples A, B1, B2, and C for the pasta pH test were 5.25, 4.20, 4.71, and 3.14, respectively. The results of the other parameters for the four samples were total sulfur contents (0.005%, 0.021%, 0.008%, 0.47%), acid neutralization ability (3.1, 2.82, 2.45, 13.07 kg H2SO4/ton), maximum acidic potential (0.153, 0.643, 0.245, 14.394 kg H2SO4/ton) and acid-base balance expressed as potential acid production (-12.917, -2.177, -3.065, 11,944). Evaluation of sample C data based on acid-base balance values (11.944 kg H2SO4/ton) and KPA/PKM ratio (<2, 0.17) indicating that sample C has the potential to form acid mine drainage if the coal mining process is carried out.
RANCANG BANGUN KAMPUNG EKOWISATA BURUNG MALEO GUNUNG (Aepypodius arfakianus) BERBASIS KEARIFAN LOKAL MASYARAKAT HATAM UNTUK MENINGKATKAN EKONOMI DAN KONSERVASI SATWA ENDEMIK PAPUA DI PEGUNUNGAN ARFAK Agustinus Kilmaskossu
Jurnal Natural Vol. 13 No. 1 (2014)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v13i1.16

Abstract

The wildlife on earth is increasingly urged by human life, where forest functions are used as residential and agricultural land. Illegal logging causes destruction of habitat and excessive use of wildlife causing damage to ecological functions in general. Uncontrolled utilization of eggs and fowls of wattled brushturkeys will accelerate the extinction of these animals in natural habitats. On the other hand the dependence on protein and economic needs of communities in the Arfak Mountains is high as evidenced by the widespread of hunting activities conducted with various purposes of utilization. Breeding efforts for the purpose of utilization need to be given attention in relation to the conservation and fulfillment of human needs. Efforts to increase the population of the bird are made through the modification of breeding and captive breeding efforts so as to encourage the acceleration of the bird population in nature and on the other hand the community interest in the fulfillment of protein and economic needs can be accommodated. Therefore, basic knowledge of the wisdom of local communities are need to support the sustainability of this bird in nature. Studies of local community wisdom and natural nest site coverage data need to be immediately obtained to fullfil the purpose. This baseline data is a reference to the establishment of appropriate breeding sites and management is expected to increase the acceleration of this bird population in nature as well as economic improvement through an ecotourism village. This research was conducted in Minyambouw District around Arfak Mountains Nature Reserve for 2 years (2013-2014). The first year study aims to find out the location of active nesting sites and strategic location to serve as a breeding model. Some active bird nests of the bird have been found in the forest of Syoubri village and then mapped based on GPS data. In the second year, the collection of cultural data of the community (local wisdom) as the basis of customary rules that bind the community. Some people (50%) still do hunting for family consumption and income. To overcome this, the community agreed and happy to make the bird and its nest as a tourist attraction. In relation to that there is a need to do management of ecological tourism for the community and creation of a captive breeding programme through a hatchery effort on wattled brushturkey birds.
PEMANFAATAN HUTAN OLEH SUKU KAMORO DI KAMPUNG TAPORMAY DAN AINDUA DISTRIK MIMIKA BARAT-JAUH KABUPATEN MIMIKA PROVINSI PAPUA M.J. Sadsoeitoeboen
Jurnal Natural Vol. 13 No. 1 (2014)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v13i1.17

Abstract

A study has been conducted in the lowland of tropical rain forest, swamps and mangroves in the vicinity of Tapormay and Aindua villages in the Far-West Mimika District from Mimika Regency, Papua Province to examine the diversity of plant and animal species and the number of plant and animal species utilized by the Kamoro tribe in the villages in they everyday life. A descriptive method with survey technique and interview to the people in Tapormay and Aindua villages were used to carry out the study. The results of the study found 36 dominant plants species in lowland tropical rain forest, five dominant species in swamp forest and nine dominant plant species in mangrove forest. While as many of 35 wildlife species were encountered in lowland tropical rain forest, marshes and mangroves consisting of nine species of mammals/marsupials, 24 species of birds and two species of reptiles. Non-timber forest products recorded by the Kamoro in both villages were 47 species divided into 10 groups: food and beverages, household necessities, sleeping equipment and rain hood, hunting tools, medicines, oil, sources of firewood, tribe ornaments, wooden boats, and musical instruments. Based on the level of forest importance or the most important function of forest area for the Kamoro is as a place to find food, that is: sago and hunting. Interview with all respondents (100%) stated that the main function of the forest is where to take sago followed by hunting activities, picking up firewood, wooden boats, fruits and medicines, and taking building materials and bark.
TUNGAU PADA DAUN MANGGA (Mangifera Indica) Rawati Panjaitan
Jurnal Natural Vol. 13 No. 1 (2014)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v13i1.20

Abstract

Mites have hostplant specifications or host plants. Mites can be destructive and deadly of which is the host plants a mango crop. Mites on mango crops will cause the leaves yellow and fall off prematurely. This is will lead to the disruption of the productivity of mango. It is necessary for research to identify the mites that infect the mango crop. The method is carried out by direct observation. Mites were taken from the surface of mango leaves later in preservation with several levels of concentration of alcohol, and polyvinyl laktofenol. Then, observed under a microscope and documented for identification purposes. Mites on the leaf surface of manalagi mango (Mangifera indica) found two species, it is Oligonychus sp. and Oligonychus ilicis (Family: Tetranychidae, Superfamily: Tetranychoidea). Oligonychus sp. hallmark is rounded body shape like a spider, with a body is transparent and there are two long seta on posterior part. While Oligonychus ilicis has a characteristic elongated rounded body shape, red, and there is a short posterior seta. Oligonychus sp. and Oligonychus ilicis live as parasites on the surface of mango leaves that can lead to wrinkled leaves, yellow and to fall. Oligonychus life cycle starts from the eggs develop into Nympha and then adult.
ANALISIS SENSITIVITAS BEBERAPA WILAYAH DI PAPUA BARAT TERHADAP FENOMENA ENSO Aries Astradhani Subgan
Jurnal Natural Vol. 13 No. 1 (2014)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v13i1.21

Abstract

Inter-annual climate variability (ENSO) become major issues for sciences for nowadays because the effect of globally. The purpose of this research is to know the characteristic of the climate on West Papua Region that can investigate and to know variable of the responds to every area of the ENSO phenomena. This is use for the climate parameter for rainfall and sea surface temperature (SST). Technic analysis begins to see periodicities rainfall using wavelet transformation. Next, analysis percentage of rainfall on the phases of ENSO Cases to see how big the influence of ENSO to the Increasing and Decreasing of rainfall in every region. Next step is to use statistic technical to see the connection between rain drop variable into the Standardized Precipitation Index (SPI) to the ENSO index. The result of wavelet analysis to the rainfall showed the domination of periodicities in one year, this indicated that the research area is effected by monsoon and local factors. The result of rain fall percentage and linier correlation analysis of ENSO index to the SPI in each territorial in general showed the ENSO influence. This can be shown by negative correlation score that means, when there is an EL NINO (La Nina) in Pacific Ocean at the same time there is a decreasing or increasing of rainfall in research territorial. The variation in each location responds showed the ENSO effect doesn’t have to influence directly to the rain fall in the research zone.

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