scholarly journals Seedling diversity and spatial distribution of some conifers and associated tree species in highly disturbed Western Himalayan regions in Pakistan

2021 ◽  
Vol 67 (No. 4) ◽  
pp. 175-184
Author(s):  
Afsheen Khan
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Species Abundance ◽  
Seedling Density ◽  
Pinus Roxburghii ◽  
Cedrus Deodara ◽  
Pinus Wallichiana ◽  
Pine Seedlings ◽  
Abies Pindrow ◽  
Associated Species

This article encompasses the impacts of disturbance, regeneration potential of conifers and the dynamics of tree species seedlings along the spatial scale in Murree forest. The seedling status preferably of conifers along with associated broadleaved dominant tree species is determined by a quantitative evaluation of diversity functions. An empirical approach is applied to predicting the future of seedlings under stress as well as the current hypothetical appearance of seedlings in the forest. The need of analysing diversity of this forest is due to highly disturbed conditions there, and this paper is designed to know the recent trends of species diversity in the area. Species diversity and species abundance at a seedling level are estimated by using standard formulas of diversity measurements. Thirty stands are used for the evaluation of seedling abundance in highly disturbed conditions with the examination of diversity in the area. Seedling density is too low in the forest whereas diversity is also in poor condition. Seedlings from four conifers with three broadleaved species in different stands indicated the low density of future trees. The mean density·ha<sup>–1</sup> of pine seedlings is consecutively low in Pinus wallichiana (16 ± 2), Pinus roxburghii (11 ± 3), Cedrus deodara (9 ± 3), Abies pindrow (8 ± 3). The correlation coefficient is as low as 0.76, 0.66 and 0.61 in Pinus roxburghii, Cedrus deodara and Abies pindrow, respectively, while Pinus wallichiana showed a significant correlation, i.e. P &gt; 0.5. Hence, this study claims that the survival of the forest is threatened as seedling density and diversity are too low. This forest needs serious attention towards preventing and conserving pines and other associated species seedlings for the existence of this forest in future.

scholarly journals Seedling dynamics and community forecast for disturbed forests of the Western Himalayas: a multivariate analysis

2020 ◽  
Vol 66 (No. 9) ◽  
pp. 383-392
Author(s):  
Afsheen Khan
Keyword(s):  
Cluster Analysis ◽  
Seedling Recruitment ◽  
Multivariate Techniques ◽  
Western Himalayas ◽  
Conifer Species ◽  
Pinus Roxburghii ◽  
Cedrus Deodara ◽  
Pinus Wallichiana ◽  
Dca Ordination ◽  
Disturbed Environment

The present study focuses on the forest structure of highly disturbed sites in Western Himalayan regions in Pakistan. In this study, the regeneration potential of conifer species is a key point for the assessment of future conifer status in disturbed environment by employing multivariate techniques. The forests are composed of four conifer species Pinus wallichiana A. B. Jacks, Pinus roxburghii Sarg., Cedrus deodara (Roxb.) G. Don, and Abies pindrow (Royle ex D. Don) Royle., associated with broadleaved species Quercus baloot Griffith, Quercus dilatata Raf., and Aesculus indica (Wall. ex Cambess.) Hook. Cluster analysis shows five groups when Pinus wallichiana (PW) forms the largest group, incorporates with other conifers and broadleaved species and in some cases it overlaps with its subgroups forming a pure larger group. Similarly in DCA (ordination) overlapping exists in all the axes while elevation is the only variable that shows a highly significant (P &lt; 0.001) correlation with conifers. Cedrus deodara (CD) with Quercus baloot (QB) and Aesculus indica (AI) shares a significant (P &lt; 0.05) correlation in the same habitat while there is no correlation between the remaining conifers. It is anticipated that overlapping in cluster analysis and ordination and non-significant correlations in cluster analysis and ordination are due to the highly disturbed nature of the sites. It is also suggested that seedling recruitment and development are highly affected due to the anthropogenic disturbance. Therefore, proper maintenance of the forest, proper management and conservational practice should be imposed. 

scholarly journals Diversity and Ethnobotanical Importance of Pine Species from Sub-Tropical Forests, Azad Jammu and Kashmir

2020 ◽  
Vol 7 (1) ◽  
pp. 94-101
Author(s):  
Kishwar Sultana ◽  
Sher Wali Khan ◽  
Safdar Ali Shah
Keyword(s):  
Tropical Forests ◽  
National Park ◽  
Nature Reserve ◽  
Cedrus Deodara ◽  
Jammu And Kashmir ◽  
Pinus Wallichiana ◽  
General Investigation ◽  
Game Reserve ◽  
Line Transects ◽  
Abies Pindrow

A general investigation of sub-tropical forests, from Pir Chinasi National Park, Tolipir National Park, Dhirkot Nature Reserve and Banjosa Game Reserve was carried out during different months from February 2008 to May 2010. The relative abundance of species was calculated using line transects of 50m. A total of five different species (Abies pindrow. Cedrus deodara, Pinus wallichiana, Pinus roxburgii and Picea smithiana) from the Pinaceae family were recorded. The main reported use of Cedrus deodara and Pinus wallichiana by the local people was for furniture and construction purposes. Pinus wallichiana was observed as the dominant species from all the selected sites.

Quantitative analysis of tree species in two community forests of Dolpa district, mid-west Nepal

1970 ◽  
Vol 2 (3) ◽  
pp. 23-28 ◽  
Author(s):  
Ripu M Kunwar ◽  
Shiv P Sharma
Keyword(s):  
Quantitative Analysis ◽  
Tree Species ◽  
Deciduous Forest ◽  
Basal Area ◽  
Stand Density ◽  
Importance Value Index ◽  
Importance Value ◽  
Cedrus Deodara ◽  
Community Forests ◽  
Pinus Wallichiana

Two community forests, Amaldapani and Juphal from Dolpa district, were selected for a study of quantitative analysis of tree flora. A total of 419 individual trees representing 16 species, 16 genera and 11 families were recorded. Total stand density and basal area were, respectively, 2100 trees ha-1 and 90 m2ha-1 in Amaldapani and 2090 tree ha-1 and 152 m2ha-1 in Juphal. Of the families, the Pinaceae was the most diverse, with 28 individuals representing five species and five genera, followed by the Rosaceae with three individuals representing two species and two genera. Pinus wallichiana, Abies spectabilis, Quercus semecarpifolia and Cedrus deodara had the highest importance value index and could therefore be considered the dominant species. Since the study area was diverse in tree population of conifers and deciduous forest tree species, it is essential to carry out further studies in order to establish conservation measures that will enhance local biodiversity. Key words: Vegetation, tree species, Pinus wallichiana, community forest, Dolpa Himalayan Journal of Sciences 2(3): 23-28, 2004

scholarly journals Temporal Changes in Tree Species Composition in Karsog Area of Northwest Himalaya

2021 ◽  
Vol 12 (1-2) ◽  
Author(s):  
Harish Bharti
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Mixed Forest ◽  
Tree Density ◽  
Forest Communities ◽  
Pinus Roxburghii ◽  
Tree Species Composition ◽  
Forest Division ◽  
Abies Pindrow ◽  
Quercus Leucotrichophora

ABSTRACT The forests of Karsog Forest Division in Himachal Pradesh were temporally analyzed for change in tree species composition. These are based on the species composition in different communities and variations along the different altitudinal gradients. The enumeration records were procured from the forest department. Total 143 forest compartments were analyzed to study the change in tree species in thirteen delineated communities, out of which six were pure forest communities and seven were mixed forest communities. The change in density (Ind/ ha) in tree species was calculated between two enumeration years, that is 1986and 2013. Results showed that out of thirteen communities, only three pure communities viz., Pinus roxburghii, Abies pindrow and Quercus leucotrichophora showed increased density while other pure communities showed decreased density in two enumeration years. Altitudinal based study revealed that the lowest altitudinal gradient (1000-2000 m) showed increase in tree density while in 2000-3000 m zone a gradual fall in tree density was observed temporally.

Ecological Status of Woody Elements in Wildlife Sanctuary Tirthan (GHNP-CA) Kullu Himachal Pradesh

2013 ◽  
Vol 36 (1) ◽  
pp. 119-123
Author(s):  
Sunil Kumar ◽  
P. Kaushal ◽  
Anita Kumari
Keyword(s):  
Species Diversity ◽  
Dominant Species ◽  
Ecological Status ◽  
Himachal Pradesh ◽  
Taxus Baccata ◽  
Vegetation Survey ◽  
Wildlife Sanctuary ◽  
Cedrus Deodara ◽  
Altitudinal Zone ◽  
Abies Pindrow

Ecological status of the flora of Tirthan Wildlife Sanctuary was undertaken to evaluate the biodiversity of this area. During the vegetation survey of Wildlife Sanctuary Tirthan in the different altitudinal zone, 23 species of trees and 18 species of shrubs were recorded. In the various altitudinal zone, the altitude 2500-3000m shows highest concentration of dominance, highest species diversity and also shows the highest evenness. The altitude 2000-2500m shows the highest richness of the trees. The species Celtis tetrandra and Taxus baccata are the dominant species whereas the species Abies pindrow, Cornus macrophylla and Cedrus deodara are sparsely present in altitude from 1500 to 3000m.

scholarly journals Tree Species Diversity, Composition and Aboveground Biomass Across Dry Forest Land-Cover Types in Coastal Ecuador

2021 ◽  
Vol 14 ◽  
pp. 194008292199541
Author(s):  
Xavier Haro-Carrión ◽  
Bette Loiselle ◽  
Francis E. Putz
Keyword(s):  
Species Diversity ◽  
Land Cover ◽  
Community Composition ◽  
Aboveground Biomass ◽  
Tree Species ◽  
Dry Forest ◽  
Stem Density ◽  
Tree Species Diversity ◽  
Land Cover Types ◽  
Schizolobium Parahyba

Tropical dry forests (TDF) are highly threatened ecosystems that are often fragmented due to land-cover change. Using plot inventories, we analyzed tree species diversity, community composition and aboveground biomass patterns across mature (MF) and secondary forests of about 25 years since cattle ranching ceased (SF), 10–20-year-old plantations (PL), and pastures in a TDF landscape in Ecuador. Tree diversity was highest in MF followed by SF, pastures and PL, but many endemic and endangered species occurred in both MF and SF, which demonstrates the importance of SF for species conservation. Stem density was higher in PL, followed by SF, MF and pastures. Community composition differed between MF and SF due to the presence of different specialist species. Some SF specialists also occurred in pastures, and all species found in pastures were also recorded in SF indicating a resemblance between these two land-cover types even after 25 years of succession. Aboveground biomass was highest in MF, but SF and Tectona grandis PL exhibited similar numbers followed by Schizolobium parahyba PL, Ochroma pyramidale PL and pastures. These findings indicate that although species-poor, some PL equal or surpass SF in aboveground biomass, which highlights the critical importance of incorporating biodiversity, among other ecosystem services, to carbon sequestration initiatives. This research contributes to understanding biodiversity conservation across a mosaic of land-cover types in a TDF landscape.

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