The Study of Tree Species Diversity in Dry Forest of East Nusa Tenggara, Indonesia

Almulqu, Aah Ahmad; Arpornpong, Noulkamol; Boonyanuphap, Jaruntorn

doi:10.21608/asejaiqjsae.2017.4198

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…It is shown from its IVI compared with the other trees species (Figure 10). This result is in line with the previous study which showed that E. urophylla dominated the vegetation of Nature Reserve of Mount Mutis, East Nusa Tenggara province (Almulqu et al, 2017). Lewotobi, Mutis, and Timau (BKLH, 2013).…”

Section: Vegetation At 500-700 M Aslsupporting

confidence: 93%

Plant Diversity and Composition of Three Different Altitudes in Sikka Forest Area - East Nusa Tenggara

Fiqa

Oktavia

2020

J Bio Bio Edu

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East Nusa Tenggara located in the Wallacea area that has many endemic species. However, the existence of germplasm diversity in this area has been threatened due to landscape changes and deforestation. The research was conducted to identify floristic composition in Sikka forest area. This research also aimed to compare that plant composition in Sikka forest area on each of the different altitudes, including their diversity richness and environmental factors. Two sampling methods were used, which are Point-Centered Quarter (PCQ) method that applied for trees and nested sampling method 5x5 m2 for sapling and 2x2 m2 for ground cover. Measured parameters were Relative Density (RD), Relative Frequency (RF), Relative Coverage/dominance (RC), Important Value Index (IVI), Diversity Index (H'), and Jaccard Similarity Index (J’). Research results showed that the diversity index of each region was relatively low. Plant composition of tree, sapling, and groundcover in three different altitudes was quite different. This result indicates that the plant composition in the Sikka, East Nusa Tenggara is very diverse. The temperature and relative humidity in each altitude area observed was significantly different. One of the endemic species of Flores Island, Eucalyptus urophylla, was only found at 500-700 m asl. There are very limited research on the vegetation diversity held in Flores, East Nusa Tenggara. This research can be the basic for further research in order to explore the potential diversity of flora in this area.

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Section: Vegetation At 500-700 M Aslsupporting

confidence: 93%

Plant Diversity and Composition of Three Different Altitudes in Sikka Forest Area - East Nusa Tenggara

Fiqa

Oktavia

2020

J Bio Bio Edu

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“…In 1997, the local government conducted reforestation using E. urophylla as the primary species for rehabilitation. In addition to having a rapid growth, E. urophylla is a native species from this location (Almulqu et al, 2019). Therefore, the implementation of reforestation is also expected to support conservation for indigenous species from East Nusa Tenggara.…”

Section: Methodsmentioning

confidence: 99%

Competition Influences Tree Dimension, Biomass Distribution, and Leaf Area Index of Eucalyptus Urophylla in Dryland Ecosystems at East Nusa Tenggara

WIRABUANA¹,

SADONO²,

MATATULA³

2022

AgricultForest

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Competition is one of the important factors that determine the productivity of forest stands. However, the effect of competition on the growth dynamics at the individual tree level is rarely documented. This study investigated the influence of competition on the tree dimension, biomass, distribution, and leaf area index (LAI) of Eucalyptus urophylla established in dryland ecosystems in East Nusa Tenggara. Data collection was conducted by N-tree sampling method with the number of center points reaching 36 units. The competition among trees was quantified using Hegyi index. Several parameters were measured to describe tree characteristics, including diameter, height, aboveground biomass, and LAI. The results demonstrated a significant influence of competition on the tree dimension, biomass distribution, and LAI of E. urophylla. The individual tree performance declined along with the increase in competition. By contrast, the increased competition gradually improved the relative contribution of branch biomass to the total aboveground biomass. The exponential model best described the linkage between competition and the tree characteristics of E. urophylla in the study site. Referring to these findings, this study concluded that the growth dynamics of E. urophylla at the individual tree level in dryland ecosystems is substantially influenced by competition.

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“…This area has geographic coordinates of S9°50′0″ to S9°50′15″ and E124°15′30″ to E124°16′0″ ( ), Figure 1 while the topography is dominated by hilly terrain with a slope level ranging from 15 to 45%. Moreover, the altitude reaches 800 m asl (Almulqu et al, 2019), while the area is classified as humid, with an average air humidity of 85.5% and a daily average temperature of 29 °C. The annual rainfall -1 -1…”

Section: Methodsmentioning

confidence: 99%

Allometric Equation for Estimating Energy Production of Eucalyptus urophylla in Dryland Ecosystems at East Nusa Tenggara

Sadono¹,

Wardhana²,

Idris³

et al. 2022

jtfm

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A precise and accurate energy production quantification, particularly at the individual tree level is needed to understand the potential contribution of eucalyptus plantations to renewable energy development. However, measuring energy storage with a destructive method is inefficient because it requires a large amount of resources. The development of allometric equations is a realistic solution to solve this problem as it facilitates the efficient estimation of energy production from trees. Therefore, this study aims to develop an allometric equation for estimating the energy production of Eucalyptus urophylla in dryland ecosystems in East Nusa Tenggara. The destructive sampling was carried out on 25 sample trees which are evenly distributed from small to large dimensions, while the calorific value of each tree component was analyzed using the bomb calorimeter method. Furthermore, the energy production of each tree was counted by multiplying the calorific value with the total biomass accumulation. To develop an allometric equation, the analysis of regression was applied using several independent variables, such as diameter at breast height (D), combined squared diameter of breast and tree height (D2H), as well as D and H separately. The results showed that the energy production of E. urophylla at the study site varied from 252.56 to 7,813.30 MJ tree-1 with more than 90% accumulated in the stem, followed by foliage (4.62%) and branches (4.05%). The higher the tree dimension, the greater the energy production. Moreover, the equation lnŶ = lna + b.lnD + c.lnH was the best allometric model to estimate energy production with an accuracy of 95.2%. Based on the results, the allometric equation provides an accurate estimation of energy production in E. urophylla.

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The Study of Tree Species Diversity in Dry Forest of East Nusa Tenggara, Indonesia

Cited by 4 publications

References 26 publications

Plant Diversity and Composition of Three Different Altitudes in Sikka Forest Area - East Nusa Tenggara

Plant Diversity and Composition of Three Different Altitudes in Sikka Forest Area - East Nusa Tenggara

Competition Influences Tree Dimension, Biomass Distribution, and Leaf Area Index of Eucalyptus Urophylla in Dryland Ecosystems at East Nusa Tenggara

Allometric Equation for Estimating Energy Production of Eucalyptus urophylla in Dryland Ecosystems at East Nusa Tenggara

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