scholarly journals Comparison of several methods of stands inventory prior to logging towards the yield volume of mangrove forest in Bintuni Bay, West Papua Province, Indonesia

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
Dr. Istomo ◽  
Cecep Kusmana ◽  
Fifi Gus Dwiyanti ◽  
Zulfikar Malik
Keyword(s):  
Mangrove Forest ◽  
Sampling Method ◽  
Allometric Equation ◽  
Systematic Sampling ◽  
Mangrove Forests ◽  
Modified Method ◽  
West Papua ◽  
Specific Formula ◽  
The Difference ◽  
Systematic Sampling Method

Abstract. Istomo, Kusmana C, Dwiyanti FG, Malik D. 2020. Comparison of several methods of stands inventory prior to logging towards the yield volume of mangrove forest in Bintuni Bay, West Papua Province, Indonesia. Biodiversitas 21: 1438-1447. The difference between the estimated volume and the actual harvested volume is the reason that mangrove forest management is unsustainable. To overcome this discrepancy, it is important to do what so called Inventarisasi Tegakan Sebelum Penebangan (ITSP) or stands inventory prior to logging for logging concession. However, the study on suitable ITSP methods for mangrove forests has been limited. This study aims to assess three ITSP methods (namely Line Strip Sampling Method, Line Systematic Sampling Method, and CIFOR’s Modified Method) using two allometric equations (i.e., equation developed specifically by a logging concession and equation developed that has specific formula for each species), and to select the combination of method and allometric equation that produce the highest accuracy for logging concession in mangrove forest, especially in Bintuni Bay, West Papua. The results showed that CIFOR’s Modified Method produces the lowest discrepancy between the estimated volume and the actual harvested volume, followed by Line Strip Sampling Method. In addition, regardless the ITSP methods employed, the allometric equation by Cole et al. (1999) outperforms the equation developed specifically by a logging concession. While producing the lowest discrepancy with plot size is the smallest than other methods, CIFOR’s Modified Method has a disadvantage when applied in the field due to difficulties in making a circular plot. As such, we recommend ITSP method to be used is the Line Strip Sampling method with allometric equation.

scholarly journals Keragaman Kondisi Salinitas Pada Lingkungan Tempat Tumbuh Mangrove di Teluk Kupang,NTT

2019 ◽  
Vol 17 (3) ◽  
pp. 425
Author(s):  
Jeriels - Matatula
Keyword(s):  
Mangrove Forest ◽  
Interpolation Method ◽  
Systematic Sampling ◽  
Mangrove Forests ◽  
Transect Line ◽  
Straight Line ◽  
Measurement Results ◽  
The Government ◽  
Systematic Sampling Method ◽  
North Sumatra

Mangrove forest ecosystems are  habitat of various types of microorganisms, but now, problems of mangrove forests experience are in quality and wealth. Efforts to rehabilitate activities  mangrove forests againts had been carried out but the results shown had not been maximized, so it is need the correct strategies  to achieve the success for rehabilitation activities. The studied was conducted in Teluk Kupang, East Nusa Tenggara, covered coastal areas of Kupang's mangrove forests and coastal mangrove forests in Kupang district. The method used in this studied was a systematic sampling method that was systematically distributed across all the mangrove forest areas. The method used for salinity measurement was  method of transmission and Transect Line Plots. Measurements was made in straight line and the size of the plot is 10 m x 10 m, the distanced between lines was 50 meters so that  total lane is 547 with the number of plots of observation 1641 plots. The value of  measurement results was made into the spread of salinity used the interpolation method. The condition of the crossed of  mangrove forest located on  coastal panoramas of  Kupang city shows a salinity value of 10,26 - 26.33%, while  salinity conditions was on the coast of  Kupang ten district 10-42.33 ‰. The salinity condition was formulation of the environmental conditions  mangrove forest on  coast of the island as well as attempts to support  management of mangrove forest activities. The distribution of different mangrove forest conditions along the coastal zone of North Sumatra shows an environmental condition that supports mangrove growth even though in some places the salinity values are high. Results of this study of salinity conditions is a study of the environment of mangrove growth so that it can provide an overview for the government in conducting various activities to rehabilitate mangrove forests.   

scholarly journals Keragaman Kondisi Salinitas Pada Lingkungan Tempat Tumbuh Mangrove di Teluk Kupang,NTT

2019 ◽  
Vol 17 (3) ◽  
pp. 425
Author(s):  
Jeriels - Matatula
Keyword(s):  
Mangrove Forest ◽  
Interpolation Method ◽  
Systematic Sampling ◽  
Mangrove Forests ◽  
Transect Line ◽  
Straight Line ◽  
Measurement Results ◽  
The Government ◽  
Systematic Sampling Method ◽  
North Sumatra

Mangrove forest ecosystems are  habitat of various types of microorganisms, but now, problems of mangrove forests experience are in quality and wealth. Efforts to rehabilitate activities  mangrove forests againts had been carried out but the results shown had not been maximized, so it is need the correct strategies  to achieve the success for rehabilitation activities. The studied was conducted in Teluk Kupang, East Nusa Tenggara, covered coastal areas of Kupang's mangrove forests and coastal mangrove forests in Kupang district. The method used in this studied was a systematic sampling method that was systematically distributed across all the mangrove forest areas. The method used for salinity measurement was  method of transmission and Transect Line Plots. Measurements was made in straight line and the size of the plot is 10 m x 10 m, the distanced between lines was 50 meters so that  total lane is 547 with the number of plots of observation 1641 plots. The value of  measurement results was made into the spread of salinity used the interpolation method. The condition of the crossed of  mangrove forest located on  coastal panoramas of  Kupang city shows a salinity value of 10,26 - 26.33%, while  salinity conditions was on the coast of  Kupang ten district 10-42.33 ‰. The salinity condition was formulation of the environmental conditions  mangrove forest on  coast of the island as well as attempts to support  management of mangrove forest activities. The distribution of different mangrove forest conditions along the coastal zone of North Sumatra shows an environmental condition that supports mangrove growth even though in some places the salinity values are high. Results of this study of salinity conditions is a study of the environment of mangrove growth so that it can provide an overview for the government in conducting various activities to rehabilitate mangrove forests.   

scholarly journals Growing Site Characteristics of Agathis labillardieri Warb in the Natural Forests of Siwi Momiwaren, West Papua

2020 ◽  
Vol 8 (3) ◽  
pp. 297
Author(s):  
Rima Herlina Setiawati Siburian ◽  
Mei Trirbo ◽  
Rusdi Angrianto
Keyword(s):  
Sampling Method ◽  
Diversity Index ◽  
Systematic Sampling ◽  
Natural Forests ◽  
Site Characteristics ◽  
West Papua ◽  
Systematic Sampling Method ◽  
Relationship Of ◽  
Important Value Index ◽  
The Relationship

Agathis labillardieri Warb is one of the copal-producing tree species that only distributed in Papua. In connection with regional development, the existence of this species has been a significant concern. Therefore, it is necessary to study the characteristics of A. labillardieri Warb in their natural growing areas in the natural protected forest of Siwi Momiwaren. The data were collected by using the line plot method systematic sampling method with nesting plot. The data were then analyzed to determine the species relative density, frequency, dominance, important value index (IVI), and growth characteristics. The results showed that A. labillardieri Warb had the highest IVI at all levels of growth, with the highest diversity index at the seedling level of 3,49. When viewed from the relationship of the presence of species with the characteristics of the growing site, the content of Mg and Na significantly affected the presence of this species in the natural forest area of South Manokwari Siwi Momiwaren.Keywords: Agathis labillardieri Warb, growing site characteristics, Siwi Momiwaren, West Papua

Economic value analysis of mangrove forest ecosystems in Sorong, West Papua Province

2014 ◽  
pp. 39
Author(s):  
Roger R Tabalessy
Keyword(s):  
Mangrove Forest ◽  
Economic Value ◽  
Forest Degradation ◽  
Primary Data ◽  
Mangrove Forests ◽  
Value Analysis ◽  
Human Needs ◽  
The People ◽  
West Papua ◽  
Mangrove Wood

Coastal areas can either meet the human needs or give great contribution to the development. However, rapid infrastrural development in Sorong, west Papua, has been followed by high demand for mangrove timber and caused mangrove forest degradation due to exploitation. This exploitation could also result from high economic value of the mangrove timber. This study was done to analyze the economic value of mangrove wood utilized by the people to support the development process in Sorong. This study used primary data obtained through interviews and the economic value calculation of mangrove forests. It found that Sorong had mangrove economic value of IDR 165,197,833, 491. Wilayah pesisir selain dapat memenuhi kebutuhan hidup manusia juga memberikan kontribusi yang besar bagi pembangunan. Cepatnya pembangunan infrastruktur di Kota Sorong diikuti pula dengan tingginya permintaan akan kayu mangrove dan menyebabkan terjadinya degradasi hutan mangrove akibat eksploitasi. Eksploitasi ini disebabkan juga akibat kayu mangrove memiliki nilai ekonomi. Penelitian yang dilakukan ini bertujuan untuk menganalisis nilai ekonomi kayu mangrove yang dimanfaatkan oleh masyarakat Kota Sorong dalam proses menunjang pembangunan. Penelitian ini menggunakkan data primer yang diperoleh melalui hasil wawancara dan perhitungan nilai ekonomi hutan mangrove. Hasil penelitian ini menunjukkan nilai ekonomi ekosistem hutan mangrove yang berada di Kota Sorong adalah Rp165.197.833.491.

scholarly journals Developing a systematic sampling method for earthworms in and around deadwood

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Frank Ashwood ◽  
Elena I. Vanguelova ◽  
Sue Benham ◽  
Kevin R. Butt
Keyword(s):  
Sampling Method ◽  
Systematic Sampling ◽  
Systematic Sampling Method

scholarly journals PRODUKSI KELAPA SAWIT (Elais guineensis Jacq.) DENGAN SISTEM PEREMAJAAN YANG BERBEDA

2020 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Nasamsir Nasamsir ◽  
Edi Romadoni
Keyword(s):  
Light Intensity ◽  
Soil Ph ◽  
Oil Palm ◽  
Crop Production ◽  
Sampling Method ◽  
Plant Production ◽  
Survey Method ◽  
Systematic Sampling ◽  
Physical Plant ◽  
Systematic Sampling Method

Abstract This study aims to determine the production of oil palm with a different replanting system. The study was conducted in the area of simultaneous fallen replanting system and underplanting system area located in Panca Mulya Village, Sungai Bahar District, Muaro Jambi Regency. The material used in this study was the Tenera variety of oil palm plants aged 4.5 years and 5.5 years. The study used a survey method with systematic sampling method. The main variables observed were plant production as well as physical plant additional variables, soil pH, light intensity, temperature, and humidity. The results showed that the replanting system significantly affected the production of oil palm plants and plant physicality, soil pH, light intensity, temperature, and air humidity. Palm oil crop production is higher in areas with simultaneous fallen replanting systems. Key words: replanting system, oil palm

scholarly journals PENGARUH JARAK TANAM TERHADAP PRODUKTIVITAS KAKAO (Theobroma cacao L.) DI DESA BETUNG KECAMATAN KUMPEH

2019 ◽  
Vol 4 (2) ◽  
pp. 59
Author(s):  
Hayata Hayata ◽  
Selly Febrina
Keyword(s):  
Theobroma Cacao ◽  
Seed Weight ◽  
Soil Acidity ◽  
Sampling Method ◽  
Systematic Sampling ◽  
Plant Spacing ◽  
Air Humidity ◽  
Plant Area ◽  
Systematic Sampling Method ◽  
Theobroma Cacao L

Arrangement of planting spacing with a certain density aims to give a plant area for each grow well. Planting spacing will affect its density and efficiency useness of light, water and nutrients using competition among the plants so finally it will affect its production. This study purposed  to determine the productivity of cocoa plants at different planting space. The research had been carried out in the community cocoa farming in Betung Village, Kumpeh Muaro Jambi District, Jambi Province, in March - April 2019. Cacao on Ten-year-old Lindak varieties were planted in a farm with plant spacing in  long and wide as 4,2 x 4,5 m (L1) and 5,5 x 6,0 m (L2). Systematic sampling method was applied and the observed variables were wet and dry seed weight, productivity, plant height, soil acidity, air temperature and humidity. The results showed that cocoa  planted in  long and wide as  5,5 x 6,0 m (L2)  gave better on both wet seed produced and dry beans productivity than those planted at  4,2 x 4,5 m (L1). The air humidity at 4,2 x  4,5 m (L1) was higher than in 5,5 x  6,0 m (L2).Keywords: cocoa, spacing, productivity AbstrakPengaturan jarak tanam dengan kepadatan tertentu bertujuan memberi ruang tumbuh pada tiap-tiap tanaman agar tumbuh dengan baik. Jarak tanam akan mempengaruhi kepadatan dan efisiensi penggunaan cahaya, persaingan diantara tanaman dalam penggunaan air dan unsur hara sehingga akan mempengaruhi produksi tanaman. Tujuan penelitian adalah untuk mengetahui  produktivitas tanaman kakao pada jarak tanam yang berbeda. Penelitian telah dilaksanakan di kebun kakao rakyat Desa Betung Kecamatan Kumpeh Muaro Jambi Provinsi Jambi, pada bulan Maret – April 2019. Tanaman kakao Varietas Lindak berumur sepuluh tahun yang ditanam pada kebun dengan jarak tanam P 4,2 x L 4,5 m (L1) dan P 5,5 x L 6,0 m  (L2). Metode pengambilan sampel Systematic Sampling dan peubah yang diamati adalah, berat biji basah, berat biji kering, produktivitas, tinggi tanaman, pH tanah, suhu dan kelembaban udara. Hasil penelitian menunjukkan bahwa Tanaman kakao yang ditanam dengan jarak P 5,5 x L 6,0 m (L2) menghasilkan produksi biji basah dan biji kering serta produktivitas yang lebih baik bila dibandingkan dengan  yang ditanam pada jarak P 4.2 x L 4.5 m (L1).  Kelembaban udara pada P 4.2 x L 4.5 m (L1) lebih tinggi dari pada (P 5.5 x L 6,0 m (L2).Kata kunci : kakao, jarak tanam, produktivitas

Frequency of Escherichia coli O157:H7 in Turkish Cattle

2002 ◽  
Vol 65 (10) ◽  
pp. 1637-1640 ◽  
Author(s):  
AYSUN YILMAZ ◽  
HUSEYIN GUN ◽  
HUSEYIN YILMAZ
Keyword(s):  
Escherichia Coli ◽  
Urease Activity ◽  
Sampling Method ◽  
Immunomagnetic Separation ◽  
Systematic Sampling ◽  
Escherichia Coli O157 ◽  
Macconkey Agar ◽  
E Coli ◽  
Systematic Sampling Method ◽  
Age And Sex

In this study, five abattoirs in Istanbul were visited between January 2000 and April 2001. During these visits, 330 cattle were selected by a systematic sampling method. Cattle were examined clinically and breed, age, and sex were recorded. Rectal swabs were taken immediately after slaughter. Immunomagnetic separation was performed, and sorbitol-negative colonies were selected on sorbitol MacConkey agar with cefixime and tellurite (CT-SMAC agar). These colonies were checked for 4-methylenebelliferyl-β-d-glucuronide, indol, rhamnose, and urease activity and motility. Serotypes of bacteria were determined by using antisera specific for Escherichia coli O157 and H7. All cattle selected were clinically healthy. Of 88 sorbitol-negative colonies selected on CT-SMAC agar, isolates from only 14 (4.2%) cattle reacted with anti-O157, and 13 of these isolates also reacted with anti-H7. E. coli O157:H7 was isolated from all breeds, but the numbers of isolates were largest for Holstein and Swiss Brown cows. E. coli O157:H7 was most frequently isolated from 2-year-old cattle. Similarly, it was most frequently isolated from male cattle. E. coli O157:H7 was isolated from cattle slaughtered in four of the five abattoirs studied.

scholarly journals THE TRANSLATION OF CIVIL AVIATION SAFETY REGULATION PART 170 AIR TRAFFIC RULES INTO INDONESIAN

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Sylvia Tiara ◽  
Hutabarat Tommy Liber ◽  
Saragih Azhari Nisa ◽  
Sinambela Marzuki
Keyword(s):  
Qualitative Method ◽  
Sampling Method ◽  
Target Language ◽  
Civil Aviation ◽  
Systematic Sampling ◽  
Dynamic Equivalence ◽  
Source Language ◽  
Formal Equivalence ◽  
Equivalence Type ◽  
Systematic Sampling Method

The background of this research was based on the continued development of international aviation in the world which was a challenge for the translator to find an equivalent sentence. The purpose of this thesis was to find the equivalence type used in translating the source language to the target language and find the dominant equivalence type used. For solving this problem, the writer used Nida and Taber theory that divided equivalence types into two types, namely formal equivalence or formal correspondence and dynamic equivalence. The method used was descriptive qualitative method. The data was obtained through systematic sampling method. Based on the analysis, the equivalence types of 53 of 66 samples (80%) were translated by using formal correspondence; 12 of 66 samples were translated using dynamic equivalence (18%) and only one sample (2%) did not neither involve in formal correspondence nor dynamic equivalence because SL text did not have translation in TL (reserved). The most dominant equivalence type used in the translation was formal correspondence.

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