scholarly journals The effect of crown pruning and induction of Acremonium sp. on agarwood formation in Gyrinops caudata in West Papua, Indonesia

2021 ◽  
Vol 22 (7) ◽  
Author(s):  
Amilda Auri ◽  
ENY FARIDAH ◽  
SUMARDI SUMARDI ◽  
SURYO HARDIWINOTO
Keyword(s):  
Considerable Effect ◽  
Natural Forests ◽  
Tree Crown ◽  
Coverage Area ◽  
Stem Infection ◽  
Crown Cover ◽  
West Papua ◽  
Fungi Infection ◽  
Agarwood Resin ◽  
Infection Spread

Abstract. Auri A, Faridah E, Sumardi, Hardiwinoto S. 2021. The effect of crown pruning and induction of Acremonium sp. on agarwood formation in Gyrinops caudata in West Papua, Indonesia. Biodiversitas 22: 2604-2611. Agarwood-producing trees have been planted by the community, but have currently not produced agarwood resin. This research examines the crown pruning effect and fungi inoculation effectivity on the formation of agarwood resin in Gyrinops caudata. The environmental modification was also ascertained based on the real environmental situation in natural forests. Furthermore, it was assumed that environmental conditions significantly influenced the growth, G. caudata tree association, and fungi infection. This method involved the tree crown cover modification. Tree crown was categorized into three different classes, i.e. dense crown (no pruning); moderate (pruning 25%), and sparse (pruning 50%). The results showed that inoculating fungi of Acremonium sp. to infection coverage area after three months produced the best results, due to Fcount 79.671. However, crown prunings obtained through heavy, moderate and non-pruning did not show any effect on stem infection spread. In the sixth month, it was observed that the fungi inoculation factor of Acremonium sp. had a significant effect on infection spread formation by Fcount of 168.894. The change in wood internal tissue also had a highly significant effect as depicted by Fcount 461.516. The fragrance level treatment also showed a considerable effect with Fcount 290.385.

scholarly journals Role of different types of protective forest stands in fodder productivity of rangeland in the Western Caspian region

2021 ◽  
Vol 16 (4) ◽  
pp. 389-399
Author(s):  
Ludmila P. Rybashlykova ◽  
Svetlana N. Sivceva ◽  
Tatyana F. Mahovikova
Keyword(s):  
Field Experiments ◽  
Robinia Pseudoacacia ◽  
Broad Band ◽  
Fold Increase ◽  
Dry Weight ◽  
Caspian Region ◽  
North Caucasus ◽  
Tree Crown ◽  
Crown Cover ◽  
Different Types

Forest pastures with different tree crown cover were studied. The seasonal dynamics of the yield and nutritional value of grass and twig-leaf fodder of forest pasture was studied. The unsystematic use of pastures in arid territories has increased the process of degradation and has become one of the factors of depletion of their natural vegetation. The use of forest reclamation in the 70s and 90s on sandy lands and pastures in the Western Caspian region made it possible to create significant areas of forest pasture land with strip and massive stands of Ulmus pumila L. and Robinia pseudoacacia L. Different types of tree stands created on pastures not only improve the microclimate and form a comfortable environment for grazing animals, but also are an additional source of valuable twig feed. The aim of the research was to study forage productivity of forest pastures with different types of plantings on the sands of the Western Caspian region. The objects of the research were forest pastures with different species composition and tree crown cover. Studies on the forage productivity of forest-reclaimed pastures were conducted in 2018-2020 on the basis of the North Caucasus branch of Federal Scientific Centre of Agroecology, Complex Melioration and Protective Af-forestation of the Russian Academy of Sciences. The research was based on field experiments and laboratory analyses. According to the results of the study, forest-reclaimed pastures with unsystematic grazing had 1.52-fold increase in productivity compared to natural ones. The largest amount of twig-leaf feed was formed in broad-band Robinia stands in summer-autumn period. The total gross stock of natural pastures of the Western Caspian region did not exceed 0.30.4 t/ha of dry weight, the consumed stock was 0.20.3 t/ha. With the help of strip and massive plantings on degraded pasture lands, it is possible to increase significantly their productivity and quality with the achievement of 7 MJ of exchange energy and 0.260.29 feed units in 1 kg of elm and robinia twig-leaf feed during droughts.

scholarly journals Komposisi Jenis dan Populasi Burung Cendrawasih di Kampung Malagufuk Distrik Klayili Kabupaten Sorong Provinsi Papua Barat

2020 ◽  
Vol 7 (2) ◽  
pp. 151-162
Author(s):  
MAYA PATTIWAEL ◽  
AMATUS TUROT
Keyword(s):  
Species Composition ◽  
Bird Species ◽  
Line Length ◽  
Natural Forest ◽  
Line Transect ◽  
Natural Forests ◽  
Diverse Species ◽  
West Papua ◽  
Line Transect Method ◽  
Papua Barat

One of the animals that are easy to find is a bird. Based on data about the increase in the number of bird species, it can be ascertained that these animals can be found in every region in Indonesia, with diverse species and even species that are endemic to a certain area. West Papua is one of the regions in Indonesia which is rich in various species of birds, including Cendrawasih which can also be found in the Natural Forest of Malagufuk Village, Klayili District, Sorong Regency. Based on information from the surrounding community, several types of Cendrawasih are often seen in the natural forests of Malagufuk Village, but their diversity and population are not known with certainty. This study aims to determine the diversity of species and population of Cendrawasih birds in the natural forest of Malagufuk Village, Klayili District, Sorong Regency, West Papua. Thus, the results of this study are expected to be a source of data in the context of preserving and protecting the existing Cendrawasih species. Data collection on the species composition and population of Cendrawasih was carried out using the Line Transect method by making 10 observation lines with a line length of 500 m each and a distance between lines of 100 m. The results showed that there were found 3 spesies of Cendrawasih with estimated populations and densities as follows: Cendrawasih Kuning Kecil (Paradisaea minor) had an estimated population of 7.48 individuals with a density of 2.93 individuals / ha; Cendrawasih Raja (Cicinnurus regius) has an estimated population of 5 individuals with a density of 1.67 individuals / ha; and Toowa Cemerlang (Ptiloris magnificus) had an estimated population of 2.22 individuals with a density of 0.74 individuals / ha. When the research was carried out, it was seen that the three types of Cendrawasih used several types of trees as places for activities (playing or dancing), namely Matoa (Pometia coreacea), Merbau (Intsia bijuga), Damar (Agathis dammara). Beringin (Ficus benjamina), and Pala hutan (Myristica sp) with tree heights above 20 m.

scholarly journals Sample-Based Estimation of Tree Cover Change in Haiti Using Aerial Photography: Substantial Increase in Tree Cover between 2002 and 2010

Forests ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1243
Author(s):  
Gabriela Rodrigues-Eklund ◽  
Matthew C. Hansen ◽  
Alexandra Tyukavina ◽  
Stephen V. Stehman ◽  
Klaus Hubacek ◽  
...  
Keyword(s):  
Forest Cover ◽  
Woody Plant ◽  
Farming Systems ◽  
Tree Cover ◽  
Tree Crown ◽  
National Scale ◽  
Crown Cover ◽  
High Resolution Imagery ◽  
Gains And Losses ◽  
First Time

Recent studies have used high resolution imagery to estimate tree cover and changes in natural forest cover in Haiti. However, there is still no rigorous quantification of tree cover change accounting for planted or managed trees, which are very important in Haiti’s farming systems. We estimated net tree cover change, gross loss, and gross gain in Haiti between 2002 and 2010 from a stratified random sample of 400 pixels with a systematic sub-sample of 25 points. Using 30 cm and 1 m resolution images, we classified land cover at each point, with any point touching a woody plant higher than 5 m classified as tree crown. We found a net increase in tree crown cover equivalent to 5.0 ± 2.3% (95% confidence interval) of Haiti’s land area. Gross gains and losses amounted to 9.0 ± 2.1% and 4.0 ± 1.3% of the territory, respectively. These results challenge, for the first time with empirical evidence, the predominant narrative that portrays Haiti as experiencing ongoing forest or tree cover loss. The net gain in tree cover quantified here represents a 35% increase from 2002 to 2010. Further research is needed to determine the drivers of this substantial net gain in tree cover at the national scale.

Grazing Values as Related to Tree-Crown Covers

1972 ◽  
Vol 2 (3) ◽  
pp. 185-189 ◽  
Author(s):  
C. J. H. Dodd ◽  
A. McLean ◽  
V. C. Brink
Keyword(s):  
Aerial Photographs ◽  
Tree Crown ◽  
Crown Cover ◽  
Close Relationship ◽  
Short Time

Studies were undertaken to determine if approximations of herbage productivity could be made from estimates of tree-crown cover, also whether or not estimates from aerial photographs would be accurate enough for this purpose. Results suggest that there is a sufficiently close relationship between herbage production and crown cover in coniferous stands to make the technique useful in range surveys. Estimation of herbage yields from the ground is too slow to be useful in surveys where large acreages have to be covered in a very short time. Similar results were obtained from ground estimates of crown canopy and those made from aerial photographs. Estimates of herbage yields on a pasture made as a result of the survey were almost identical to those established from an earlier grazing trial.

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

scholarly journals Agarwood in the forest community and its potential depletion in West Papua

2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Destri Destri ◽  
Zaenal Mutaqien ◽  
Andes Hamuraby Rozak
Keyword(s):  
Principal Component Analysis ◽  
Endangered Species ◽  
Basal Area ◽  
Principal Component ◽  
Forest Community ◽  
Natural Forests ◽  
Potential Density ◽  
Importance Value ◽  
Karst Forest ◽  
West Papua

Agarwood or eaglewood is a trading name of a solid resin from the two genera Aquilaria and Gyrinops which belongs to the Thymeleacea. The declining population of agarwood in natural forests placed the commodity regulated in Appendix II of the Convention on International Trade in Endangered Species (CITES). Indonesia as one of the habitats of those two genera and also the main exporting country of agarwood has an interest in ensuring the sustainability of agarwood. This study aims to provide an updated habitat of agarwood-producing trees and to estimate the potential density of the agarwood species. Research conducted in the forest of Natural Tourism Park of Beriat, West Papua, showed that Aquilaria filaria grows well in the forest. Five adult individuals were found in karst forest where 72% were dominated by small trees (DBH <20 cm). In terms of forest communities, Aquilaria's basal area reaches 1.9% of the total basal area and has a low importance value of 0.016 in the first dimension of Principal Component Analysis (PCA). The overall potential for agarwood-producing trees was estimated to be only around 2.50 and 2.89 for tree and seedling per hectare, respectively. The potential density is decreased when compared to the estimated density carried out 20 years ago which was estimated at around 4.33 trees per hectare. Efforts to protect agarwood, one of which is by determining trade quotas, need to be carried out optimally in order to minimize the decline in agarwood populations in their natural forests.

Analisa Coverage Area Jaringan 4G LTE

2017 ◽  
Vol 5 (1) ◽  
pp. 63
Author(s):  
Maria Ulfah
Keyword(s):  
Coverage Area ◽  
4G Lte

Climate resilience through natural regeneration in degraded natural forests of south-eastern hilly region of Bangladesh

2019 ◽  
Vol 48 (3) ◽  
pp. 417-425
Author(s):  
Md Khayrul Alam Bhuiyan ◽  
Md Akhter Hossain ◽  
Abdul Kadir Ibne Kamal ◽  
Mohammed Kamal Hossain ◽  
Mohammed Jashimuddin ◽  
...  
Keyword(s):  
Tree Species ◽  
Natural Regeneration ◽  
Diversity Indices ◽  
Acacia Auriculiformis ◽  
Quantitative Structure ◽  
Natural Forests ◽  
Climate Resilience ◽  
Hilly Region ◽  
Major Cluster ◽  
Ecological Dominance

A study was conducted by using 5m × 5m sized 179 quadrates following multistage random sampling method for comparative regenerating tree species, quantitative structure, diversity, similarity and climate resilience in the degraded natural forests and plantations of Cox's Bazar North and South Forest Divisions. A total of 70 regenerating tree species were recorded representing maximum (47 species) from degraded natural forests followed by 43 species from 0.5 year 39 species from 1.5 year and 29 species from 2.5 year old plantations. Quantitative structure relating to ecological dominance indicated dominance of Acacia auriculiformis, Grewia nervosa and Lithocarpus elegans seedlings in the plantations whereas seedlings of Aporosa wallichii, Suregada multiflora and Grewia nervosa in degraded natural forests. The degraded natural forests possess higher natural regeneration potential as showed by different diversity indices. The dominance-based cluster analysis showed 2 major cluster of species under one of which multiple sub-clusters of species exists. Poor plant diversity and presence of regenerating exotic species in the plantations indicated poor climate resilience of forest ecosystem in terms of natural regeneration.

Descriptive statistics of tree crown condition in California, Oregon, and Washington

2010 ◽  
Author(s):  
KaDonna C. Randolph ◽  
Sally J. Campbell ◽  
Glenn Christensen
Keyword(s):  
Descriptive Statistics ◽  
Tree Crown ◽  
Crown Condition
Sign in / Sign up

Export Citation Format

Share Document