Vegetation analysis, physico-chemical properties and economic potential of damar (Agathis dammara) in Mount Halimun Salak National Park,West Java, Indonesia

Adalina, Yelin; Sawitri, Reny

doi:10.13057/biodiv/d210336

Cited by 4 publications

(7 citation statements)

References 21 publications

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“…The IVI value of A. labillardieri Warb at each phase showed a higher value compared to other types in the region. However, the results in this study were still low when compared with the results of the study by Adalina and Sewitri (2020), which stated that the IVI value obtained from the Agathis dammara research results in Mount of Halimun Salak National Park was 300%.…”

Section: Potential Of a Labillardieri Warbcontrasting

confidence: 82%

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

Siburian

Trirbo²,

Angrianto³

2020

JSL

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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

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Section: Potential Of a Labillardieri Warbcontrasting

confidence: 82%

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

Siburian

Trirbo²,

Angrianto³

2020

JSL

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“…Several authors ( Mantell and Rubenkoenig, 1937 ; Fiebach and Grimm, 2000 ; Morkhade et al., 2006 ; Umekar and Yeole, 2008 ; Adalina and Sawitri, 2020 ) revealed different values of the softening point of copal resin, which ranged from 79 to 117 °C. Mantell and Rubenkoenig (1937) recorded a melting point range of 123–132 °C, which depended on the classification of Manila copal.…”

Section: Resultsmentioning

confidence: 99%

“… Mantell and Rubenkoenig (1937) recorded a melting point range of 123–132 °C, which depended on the classification of Manila copal. Agathis dammara from West Java, Indonesia had a melting point of 118–123 °C ( Adalina and Sawitri, 2020 ). Stickiness of Agathis alba resin was observed with thermal resistance test at 110 °C for 30 min ( Mulyono and Adrianus, 2012 ).…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, differential scanning calorimetry was used to illustrate the transformation of resins between two different states, which is dependent on their composition and structure ( Zhang et al., 2012 ). Some studies that used this method showed the softening point of copal resin to vary from 79 to 117 °C ( Fiebach and Grimm, 2000 ; Morkhade et al., 2006 ; Umekar and Yeole, 2008 ; Adalina and Sawitri, 2020 ) and a melting point range of 115–135 °C for a variety of Agathis resins ( Boer and Ella, 2000 ; Adalina and Sawitri, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

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Geographical variations and correlation among some chemical and thermal properties of Almaciga (Agathis philippinensis Warb.) resins from selected commercial sites in the Philippines

Razal

Jara

Samar

et al. 2021

Heliyon

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Almaciga ( Agathis philippinensis Warb.), a tropical conifer that is tapped for its resin commercially known as Manila copal, grows in many parts of the Philippines, but resin buyers prefer and pay a better price for resin from southern Palawan. The study was done to characterize almaciga resins obtained from commercial sites in Davao Oriental and Palawan (Brooke's Point and Marufinas) to explain the quality and price differences. Fresh and aged resin samples were subjected to wet chemical, thermal, and spectral analyses. Generally, the resin samples were found to be soluble in the more polar solvents although significant variations were observed for resins from various sites. Titrimetric determination revealed no significant variation in acid and saponification values, although the Brooke's Point resin had significantly lower unsaponifiable components. Predominant Fourier transform infrared spectroscopy (FTIR) absorption peaks for fresh resin include strong C=O stretch and weak = C–H stretch. Aged Palawan resins, which showed increased solubility in polar solvents, exhibited increased intensity of prominent FTIR peaks such as O–H stretch and C=O stretch. The weak peak at 1719 cm −1 seen in fresh Palawan resins was no longer observed in aged resins. DSC revealed the semi-crystalline nature of almaciga resin and melting temperatures similar to diterpenoid resin acids. This is attributed to the presence of increasing amounts of oxidized abietic acids as shown by gas chromatography-mass spectrometry (GCMS). For the Davao Oriental resins, significant amount of agatholic acid was shown, while resin acids of the abietane and pimarane type were conspicuously absent in the GC-MS spectrograms. The study found evidence that almaciga resins from Davao and Palawan differ in chemical composition and physical properties, which could explain the quality and price differences.

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“…The leaf surface is rather thick, the edges are flat, and the tips of the leaves are pointed. It is slightly reddish when it is still young (Adam et al, 2017;Adalina & Sawitri, 2020). The resin bark is rather soft and gray, usually peeling off into flakes.…”

Section: Table 1 Gain Value Datamentioning

confidence: 99%

The Influence of Rare Plants Exploration in Taman Eden 100 Lumban Julu on Students' Science Process Skills

Manurung,

Tarigan,

Saputra

2023

JPII

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This study aims to determine the significant effect of rare plant exploration activities in Taman Eden 100 Lumban Julu on students’ Science Process Skills (SPS) levels for deepening Biology learning material. The research method used was quasi-experimental with a significance level of α = 0.05. The data analysis technique used the group average effect test. The results showed that the result of the normality test on the pretest Lo Ltable was 0.1826 0.190 and on the posttest Lo Ltable was 0.1707 0.190, and the homogeneity test results obtained Fcount Ftable = 1.83 2.12. Hypothesis testing calculations obtained tcount ttable = 25.50 1.72. This study concludes that the level of students’ SPS by doing exploration has a significant influence. This can also be seen from the results of calculating the final increase (gain) score, where the gain value for each indicator is classified as medium and high. This shows that the science process skills possessed by students have increased.

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Vegetation analysis, physico-chemical properties and economic potential of damar (Agathis dammara) in Mount Halimun Salak National Park,West Java, Indonesia

Cited by 4 publications

References 21 publications

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

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

Geographical variations and correlation among some chemical and thermal properties of Almaciga (Agathis philippinensis Warb.) resins from selected commercial sites in the Philippines

The Influence of Rare Plants Exploration in Taman Eden 100 Lumban Julu on Students' Science Process Skills

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