scholarly journals Vegetation Analysis of Namuna Community Forest of Salbari, Sanischare VDC in Jhapa District, Eastern Nepal

2009 ◽  
Vol 23 ◽  
pp. 12-15
Author(s):  
Krishna Prasad Bhattarai
Keyword(s):  
Tree Species ◽  
Forest Conservation ◽  
Basal Area ◽  
Mean Value ◽  
Forest Community ◽  
Total Density ◽  
Community Forest ◽  
History Museum ◽  
Shorea Robusta ◽  
Vegetation Study

Vegetation study was carried out in an afforested land called Namuna Community Forest in Salbari, Sanischare, VDC, Jhapa, District. Random samplings for estimation of density, frequency, basal area and IVI were carried out by laying quadrates (10m x 10 m) at different sites of forest, three times and mean value was calculated. Nine tree species were recorded during field study. Total density of 10,410 pl/ha and total basal area of 33.956 m2/ha of tree species were recorded. The value of density (1790 pl/ha), basal area (31.45m2/ha) and IVI (130.63) were found highest for Shorea robusta, which is ecologically successful species in this forest. Lower value of basal area showed that this forest is young and regenerating. Other tree species had comparatively lower value of density, basal area and IVI due to regular human inte rference. Therefore an example of establishing forest community so as to initiate the conservation of local biodiversity has been discussed in this article.Key words: Community forest; conservation; IVI estimation; regenerating; Shorea robustaJournal of Natural History Museum Vol. 23, 2008 Page 12-15

scholarly journals Forest Composition, Fuelwood Harvest and Regeneration Status in Four Community Forests of Central Nepal

1970 ◽  
Vol 7 (7) ◽  
pp. 53-58 ◽  
Author(s):  
Ghanashyam Subedi ◽  
Binod Khatiwada ◽  
Sandesh Bhattarai ◽  
Kamal Prasad Acharya
Keyword(s):  
Tree Species ◽  
Forest Community ◽  
Forest Composition ◽  
Community Forest ◽  
Community Forests ◽  
Shorea Robusta ◽  
Regeneration Status ◽  
Central Nepal ◽  
Scientific World ◽  
Castanopsis Indica

Present study aims to explore forest composition, fuelwood harvest and regeneration status in two community forests of central Nepal. We carried out our study in different periods of 2007 and 2008. Household surveys were conducted to find the condition of fuelwood harvest and people dependency on community forest. Community forests of Nawalparasi districts are dominated by Shorea robusta whereas community forests of Syanja district are dominated by Castanopsis indica and Schima wallichii with highest IVI value. Percapita fuelwood consumption and domestic animals are higher in Nawalparasi district than in Syanja district. Grasses are the main source of fodder in Nawalparasi district whereas trees in Syanja district. Farmland is the main source for fodder in both the districts but even higher in Syanja district. For fuelwood people depend on forest than the farmland. Dominant tree species in Patapati Lulpani Community Forest (PLCF) showed reverse J-shaped size class distribution indicating sustainable regeneration whereas dominant tree species in Gamtam Community Forest (GCF), Dhuseri Community Forest (DCF) and Bhedawari Community Forest (BCF) showed poor regeneration status. Key words: Community forest; Forest composition; Fuelwood harvest; Regeneration. DOI: 10.3126/sw.v7i7.3826 Scientific World Vol.7(7) 2009 pp.53-58

scholarly journals Species Diversity, Forest Community Structure and Regeneration in Banke National Park

2016 ◽  
Vol 16 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Renu Napit
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Tree Species ◽  
National Park ◽  
Basal Area ◽  
Size Class ◽  
Forest Community ◽  
Total Density ◽  
Size Class Distribution ◽  
Class Distribution

Banke national park, located in Banke district of western Nepal with an area of 550 sq. km was established as the  tenth national park in 2010 A.D. Forest community structure, species diversity and natural regeneration were  studied in the Park. A total of 1067 plots at every interval of 200m were laid by line transect method for the study. In  each plot three concentric rings of radii of 10m, 5m, and 1m were laid down for the study of trees, shrubs/saplings  and herbs/seedlings respectively. The park was floristically rich with a total of 113 species of trees representing 57  genera and 28 families. Similarly 85 species of shrubs including climbers and 107 species of herbs including  herbaceous climbers, and grasses were recorded. The obtained results from the size class distribution of the trees  resembling inverse ‘J’ shape indicated the good regenerating capability of the forest in the park. Fifty eight species  of saplings and 40 species of seedlings of trees were recorded. From the quantitative study of the trees, the  dominant species was Shorea robusta based on IVI (important value index) values, which was followed by Terminalia  alata, Anogeissus latifolius, Mallotus philippinensis, etc. The total density stand (D) and basal area (BA) of the  park were 291.48 trees/ha and 21.13 m2/ha respectively. The highest density (D) and the basal area (BA) of S.  robusta was 46.07 trees /ha and 5.07m2/ha respectively. The species diversity index (H) of the tree species in BaNP  was 1.32, with species evenness (J) of 0.64 and index of dominance (C) of 0.08. A total of seven forest community  types were estimated in the Park. The size class distribution diagram of all trees showed right skewed (inverse J  shaped) pattern indicating a good regenerating capability of the forest. The regeneration of S. robusta, T. alata and  A. latifolius were higher in comparison to other tree species which was indicated by the higher seedlings and  saplings density of them. S. robusta was the dominant with saplings density of 200.49 / ha and seedlings density  of 27153.4 /ha.Nepal Journal of Science and Technology Vol. 16, No.1 (2015) pp. 17-30

Structure and Regeneration of Sal (Shorea robusta Gaertn. f.) Forests in Shiwalik Region of Kumaun Himalaya, India

2017 ◽  
Vol 40 (1) ◽  
pp. 1-8
Author(s):  
Bhawna Adhikari ◽  
◽  
Bhawana Kapkoti ◽  
Neelu Lodhiyal ◽  
L.S. Lodhiyal ◽  
...  
Keyword(s):  
Tree Species ◽  
Basal Area ◽  
Tree Canopy ◽  
Canopy Density ◽  
Kumaun Himalaya ◽  
Shorea Robusta ◽  
Canopy Trees ◽  
Dense Forest ◽  
Open Forest ◽  
Sal Forest

Present study was carried out to assess the structure and regeneration of Sal forests in Shiwalik region of Kumaun Himalaya. Vegetation analysis and tree canopy density was determined by using quadrat and densitometer, respectively. Density of seedlings, saplings and trees was 490-14067, 37-1233, and 273-863 ind.ha-1 respectively. The basal area was 0.12-5.44 m2 ha-1 reported for saplings and 25.4-77.6 m2 ha-1 for trees. Regeneration of Sal was found good in Sal mixed dense forest followed by Sal open forest and Sal dense forest, respectively. Regeneration of Sal was assisted by the presence of associated tree species as well as the sufficient sunlight availability on ground due to adequate opening of canopy trees in Sal forest. Thus it is concluded that the density of tree canopy, sunlight availability and also associated tree species impacted the regeneration of Sal in the region.

scholarly journals Forest Structure, Composition and Above Ground Biomass of Tree Community in Tropical Dry Forests of Eastern Ghats, India

2016 ◽  
Vol 8 (1) ◽  
pp. 125-133 ◽  
Author(s):  
Sudam Charan SAHU ◽  
H.S. SURESH ◽  
N.H. RAVINDRANATH
Keyword(s):  
Forest Structure ◽  
Tree Species ◽  
Basal Area ◽  
Eastern Ghats ◽  
Tropical Dry Forests ◽  
Above Ground Biomass ◽  
Importance Value ◽  
Shorea Robusta ◽  
Ground Biomass ◽  
C Stocks

The study of biomass, structure and composition of tropical forests implies also the investigation of forest productivity, protection of biodiversity and removal of CO2 from the atmosphere via C-stocks. The hereby study aimed at understanding the forest structure, composition and above ground biomass (AGB) of tropical dry deciduous forests of Eastern Ghats, India, where as a total of 128 sample plots (20 x 20 meters) were laid. The study showed the presence of 71 tree species belonging to 57 genera and 30 families. Dominant tree species was Shorea robusta with an importance value index (IVI) of 40.72, while Combretaceae had the highest family importance value (FIV) of 39.01. Mean stand density was 479 trees ha-1 and a basal area of 15.20 m2 ha-1. Shannon’s diversity index was 2.01 ± 0.22 and Simpson’s index was 0.85 ± 0.03. About 54% individuals were in the size between 10 and 20 cm DBH, indicating growing forests. Mean above ground biomass value was 98.87 ± 68.8 Mg ha-1. Some of the dominant species that contributed to above ground biomass were Shorea robusta (17.2%), Madhuca indica (7.9%), Mangifera indica (6.9%), Terminalia alata (6.9%) and Diospyros melanoxylon (4.4%), warranting extra efforts for their conservation. The results suggested that C-stocks of tropical dry forests can be enhanced by in-situ conserving the high C-density species and also by selecting these species for afforestation and stand improvement programs. Correlations were computed to understand the relationship between above ground biomass, diversity indices, density and basal area, which may be helpful for implementation of REDD+ (reduce emissions from deforestation and forest degradation, and foster conservation, sustainable management of forests and enhancement of forest carbon stocks) scheme.

scholarly journals Regeneration, growth of Hill Sal and plant diversity in Community Forest: A case study from Pragatisil Community Forest in Kaski District, Western Nepal

2016 ◽  
Vol 23 (2) ◽  
pp. 37-43 ◽  
Author(s):  
B. K. Paudyal
Keyword(s):  
Plant Species ◽  
Plant Diversity ◽  
Growth Parameters ◽  
Basal Area ◽  
Community Forest ◽  
Shorea Robusta ◽  
Plot Size ◽  
Regeneration Status ◽  
M 10

The study was conducted in the Pragatisil Community Forest, Kaski District, Nepal in 2012 to assess the regeneration status of Sal (Shorea robusta) seedlings, its growth and plant diversity. A plot size of 25 m × 20 m was employed for trees, 10 m ×10 m for poles and 5 m × 5 m for regeneration. The growth parameters measured were dbh and height. A factorial arrangement of treatments was employed; the treatments being slope and aspect. The results showed that there was significant (p<0.05) effect of slope on dbh and basal area whereas there was no effect of aspect on growth parameters measured in the Pragatisil Community Forest. The regeneration of Sal was satisfactory (6,126 seedlings/ha), and there were 32 plant species in this forest. As there was higher basal area per ha in the Pragatisil Community Forest, it is recommended to have thinning of 40% of basal area for enhancing growth of remaining stems.Banko Janakari, Vol. 23, No. 2, 2013

scholarly journals Effects of Forest Fire on the Regeneration Potentials of Tree Species in Olokemeji Forest Reserve, Ogun State, Nigeria

2021 ◽  
Vol 25 (6) ◽  
pp. 921-926
Author(s):  
A.J. Oloketuyi ◽  
O.T. Adeoye ◽  
O.A. Aina-Oduntan ◽  
I.E. Odiaka ◽  
O.S. Afolabi
Keyword(s):  
Forest Fire ◽  
Tree Species ◽  
Fire Regime ◽  
Basal Area ◽  
Tree Height ◽  
Mean Value ◽  
Management Tool ◽  
Regeneration Potential ◽  
Forest Reserve ◽  
Ogun State

Effects of forest fire on the regeneration potential of trees at Olokemeji Forest Reserve was established in this study. The Olokemeji fire experimental plot was selected at the reserve. The site was divided into three plots; late fire treatment was applied to Plot A, Early fire treatment was also applied to Plot B and no fire treatment at plot C (Control plot). The diameter at breast height (dbh) and tree height (m) of the tree species in the plots were assessed prior and post fire treatment. The regeneration potential of the selected plots after burning were assessed through the occurrence of saplings and seedlings obtained. The highest basal area (m2) were found in plot C followed by plot B and Plot C with mean value of 0.64, 0.55 and 0.30 m2 respectively. The number of stems per plot ranged from 25 to 67. The regeneration potentials of the three plots were found to be noteworthy. Early and late year fire regime adopted had both positive and negative effect on the regeneration potentials of tree species. This study has established the effect and relevance of fire on forest and wildlife management. It’s therefore recommended in this study that Prescribed or controlled burning should be encouraged as appropriate sivilcultural management tool for stimulating basal area growth, natural regeneration, production of tree species seedlings and saplings.

scholarly journals Estimation of Ecosystem Carbon Stock and Tree Species Diversity at National Botanical Garden, Dhaka, Bangladesh

2019 ◽  
pp. 1-11
Author(s):  
Md. Delwar Hossain ◽  
Md. Ehsanul Haq ◽  
Manna Salwa ◽  
Md. Nazmul Islam Shekh ◽  
Aisha Siddika ◽  
...  
Keyword(s):  
Species Diversity ◽  
Organic Carbon ◽  
Tree Species ◽  
Carbon Stock ◽  
Basal Area ◽  
Botanical Garden ◽  
Mean Value ◽  
Biomass Carbon ◽  
Tree Species Diversity ◽  
Ecosystem Carbon

The study was conducted from January to April 2018 to estimate ecosystem carbon stock and tree species diversity at National Botanical Garden, Bangladesh. Transects line method square plots with a size of 20 m × 20 m were used. So altogether there were total eighty-three sample plots in National Botanical Garden. Above ground carbon (AGC) and below ground carbon (BGC) biomass stock was 192.67 and 31.34, respectively and soil organic carbon mean value of 27.52 Mg ha-1, 21.45 Mg ha-1 and 16.23 Mg ha-1, respectively for 0-10 cm depth, 10-20 cm and 20-30 cm depth. The average number of tree species per hectare was 128 with a mean value of each plot 3.00 to 9.00 species. The average number of trees in National Botanical Garden (233 tree ha-1), basal area (21.45 m2 ha-1) and mean DBH (39.86 cm). Tree diversity range from 0.25 to 1.86 and the mean value of (0.93 ± 0.14) in National Botanical Garden. A relationship such as biomass carbon with the basal area, mean DBH, stem density and tree diversity were estimated. Among these, the relationship between basal area and biomass carbon showed positive significant correlation. Therefore, the results of the study confirmed that the selected botanical garden can serve as a valuable ecological tool in terms of carbon sequestration, diverse tree species and storage of soil organic carbon.

scholarly journals Buffer Zone Resources and Community Conservation: A Case Study of Handi Khola Buffer Zone User Committee, Parsa Wildlife Reserve

2012 ◽  
Vol 12 ◽  
pp. 230-237
Author(s):  
Aruna Thapa ◽  
Dinesh R Bhuju
Keyword(s):  
Tree Species ◽  
Large Scale ◽  
Buffer Zone ◽  
Community Forest ◽  
Fuel Wood ◽  
Unequal Distribution ◽  
Shorea Robusta ◽  
Live Tree ◽  
Cut Stump ◽  
Wildlife Reserve

The present study was carried out to understand ecology of forests and social strata in Handi Khola Buffer Zone User Committee of Parsa Wildlife Reserve in Central Nepal. Methods used were stratified random sampling of household economics with questionnaire survey for socio-economic information and quantitative and qualitative analysis for vegetation study. Seventy two households were studied in-depth through household surveys. Vegetation ecology and forest resources were studied in Rakshaniya, Dhaneshwor, Laamitar and Masine forests of the BZ, totaling 37 sample plots. The study recorded a total of 36 tree species from 19 families. Shorea robusta was the dominant tree species in the community forest with highest important percentage, standing volume, biomass and sustainable fuel wood yield. The study area was sufficient to fulfill the demand of the fuel wood and timber in a sustainable way but annual demand of fodder (9640.54 tons/year) outstripped the annual sustainable supply of fodder (409.41 total digestible nutrient in tons/year). Thus, community forest was insufficient to provide the resource equally to all seasons and its unequal distribution compelled the locals for illegal extraction of resource showing some pressure on the reserve. In addition, large-scale human interference (Cut Stump Density-39.56/ha and Live Tree Density-58.11/ha) in community forest questioned the endurance of buffering potential and biodiversity conservation.DOI: http://dx.doi.org/10.3126/njst.v12i0.6507 Nepal Journal of Science and Technology 12 (2011) 230-237 

STUDIES IN MONODOMINANT FORESTS IN EASTERN MATO GROSSO, BRAZIL: I. A FOREST OF BROSIMUM RUBESCENS TAUB

2001 ◽  
Vol 58 (1) ◽  
pp. 123-137 ◽  
Author(s):  
B. S. MARIMON ◽  
J. M. FELFILI ◽  
M. HARIDASAN
Keyword(s):  
Tree Species ◽  
Diversity Index ◽  
Basal Area ◽  
Low Fertility ◽  
Diameter Distribution ◽  
Total Density ◽  
Importance Value ◽  
Mato Grosso ◽  
High Concentrations ◽  
Amazonian Forests

The occurrence of a monodominant tropical forest dominated by the tree species Brosimum rubescens Taub. (Moraceae) in the transition zone between the cerrado region and the Amazonian rain forests along the Araguaia valley in the state of Mato Grosso in Brazil is reported. A 6000m2 (40×150m) area located in the central portion of a forest (14°50′47″S, 52°08′37″W) on the Eldorado Farm in Nova Xavantina was sampled to determine the structure, phytosociology and soil properties. A total of 44 tree species was found in the forest, with a Shannon diversity index (H′) of 2.37 and the Pielou evenness index (J′) of 0.63. These values were similar to those reported by other workers in an Amazonian monodominant forest dominated by Peltogyne gracilipes. Average tree density equal or greater than (≥) 5cm dbh was 1066ha−1 and basal area 37.46m2 ha−1. Dead standing individuals represented 7.03% of the total density and lianas 8.12%. The main families were Moraceae, Rubiaceae, Burseraceae, Hippocrateaceae and Leguminosae–Caesalpinioideae. The species with the highest importance value indices were B. rubescens (124.55), Amaioua intermedia var. brasiliana (32.97), Cheiloclinium cognatum (22.41), Tetragastris balsamifera (19.58) and Protium pilosissimum (16.64). Brosimum rubescens alone accounted for 85.5% of the individuals ≥30cm dbh, 80.35% of those ≥20cm dbh, 57.33% of those ≥10cm dbh, and 35.85% of those ≥5cm dbh. The forest was composed of upper, middle and lower storeys. Diameter distribution was unbalanced for the community and for the main species, suggesting that establishment has been episodic. The surface soil was acid, with high exchangeable Al levels and low fertility, as is the case for most cerrados and Amazonian forests. The availability of K was in the range of adequacy, as compared with most native soils. However, concentrations of available Mg in the soil was higher than that of available Ca, with Mg/Ca ratios above three, unlike most cerrados and Amazonian forests, but similar to the soils of many monodominant tropical forests reported in the literature. Soils were characterized by high concentrations of available Fe. Besides the high Mg/Ca ratios, a high proportion of K as compared with the bivalent cations Ca and Mg, and toxicities of Fe and Mn due to strong acidity could be factors influencing the occurrence of species in this forest.

scholarly journals When a foundation crumbles: forecasting forest community dynamics following the decline of the foundation speciesTsuga canadensis

2017 ◽  
Author(s):  
Bradley S. Case ◽  
Hannah L. Buckley ◽  
Audrey A. Barker-Plotkin ◽  
David A. Orwig ◽  
Aaron M. Ellison
Keyword(s):  
Tree Species ◽  
Community Dynamics ◽  
Initial Conditions ◽  
Basal Area ◽  
Adelges Tsugae ◽  
Eastern Hemlock ◽  
Forest Community ◽  
Forest Communities ◽  
Salvage Logging ◽  
Hemlock Decline

AbstractIn the forests of northeastern North America, invasive insects and pathogens are causing major declines in some tree species and a subsequent reorganization of associated forest communities. Using observations and experiments to investigate the consequences of such declines are hampered because trees are long-lived. Simulation models can provide a means to forecast possible futures based on different scenarios of tree species decline, death, and removal. Such modeling is particularly urgent for species such as eastern hemlock (Tsuga canadensis), a foundation species in many northeast forest regions that is declining due to the hemlock woolly adelgid (Adelges tsugae). Here, we used an individual-based forest simulator, SORTIE-ND, to forecast changes in forest communities in central Massachusetts over the next 200 years under a range of scenarios: a no-adelgid, status-quo scenario; partial resistance of hemlock to the adelgid; adelgid irruption and total hemlock decline over 25 years, adelgid irruption and salvage logging of hemlock trees; and two scenarios of preemptive logging of hemlock and hemlock/white pine.We applied the model to six study plots comprising a range of initial species mixtures, abundances, and levels of hemlock dominance. Simulations indicated that eastern white pine, and to a lesser extent black birch and American beech, would gain most in relative abundance and basal area following hemlock decline. The relative dominance of these species depended on initial conditions and the amount of hemlock mortality, and their combined effect on neighborhood-scale community dynamics. Simulated outcomes were little different whether hemlock died out gradually due to the adelgid or disappeared rapidly following logging. However, if eastern hemlock were to become partially resistant to the adelgid, hemlock would be able to retain its dominance despite substantial losses of basal area. Our modeling highlights the complexities associated with secondary forest succession due to ongoing hemlock decline and loss. We emphasize the need both for a precautionary approach in deciding between management intervention or simply doing nothing in these declining hemlock forests, and for clear aims and understanding regarding desired community- and ecosystem-level outcomes.

Sign in / Sign up

Export Citation Format

Share Document