Characterization of diameter distribution of some tree species from gilgit-baltistan using weibull distribution
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2014, Vol 5, Issue 4
Abstract
Forty stands were sampled to investigate the overall diameter size classes of four dominant tree species of some forests from Gilgit-Baltsitan. On the basis of overall density of individuals of a species the size class structure was derived. Pinus wallichiana A.B.Jacks .occupied 128±21.1 mean stems ha-1, Picea smithiana (Wall.)Boiss. attained 121±5 mean stems ha-1 ,Betula utilis D.Don had a density of 61±18.8 mean stems ha-1 while Juniperus excelsa M.Bieb. had 38±14.3 mean stems ha-1.The DBH distribution of each species was characterized by a three parameter Weibull probability distribution. This distribution was selected as a model since it is flexible and has been demonstrated to provide a good-fit to the size-class structure. Using the maximum likelihood method of parameter estimation, Weibull parameters , a, b and c were estimated and the cumulative distribution was fitted to DBH of evergreen and broad-leaf tree species in which DBH served as an independent variable of the diameter distribution of the natural unevenaged forests. The model showed usually excellent fit to the distribution as indicated by high R2 values. These models can prove to be very handy for an effective management of forest resources.
Authors and Affiliations
Muhammad Akbar, S. Shahid Shaukat, Moinuddin Ahmed, Alamdar Hussain, Sujjad Hyder, Shaukat Ali, Faisal Hussain, ghulam Raza, Syed Arif Hussain, Haibat Ali, Muhammad Raza,Salar Ali, Karamat Ali
Keywords
Related Articles
- EP ID EP38005
- DOI -
- Views 153
- Downloads 0
Study on biological spectrum of Madhav National Park, Shivpuri Madhya Pradesh India
The present study was carried out to understand the Biological spectrum of the flora of Madhav National Park. A total of 65 species, 59 genera belonging 41 families were estimated from the study area. Leguminaceae was t...
Genotypic diversity of turmeric (Curcuma longa L.) accessions in mindanao, philippines on the basis of curcumin content
Twenty-one turmeric accessions collected from seven provinces in Mindanao were grown in a uniform environment and analyzed for curcumin content. Rhizome bits of each accession were planted in big plastic bags and rando...
Population ecology, threats, status and conservation of natural populations of Crotalaria longipes - an endangered plant
Crotalaria longipes is an endangered plant endemic to Kolli hills. It is one of the fifteen species listed in the Red Data Book of Indian plants. Initially field visits were made to locate the plant at Kolli hills. The...
Response of rice (Oryza sativa L.) germplasm against Xanthomonas oryzae pv. oryzae (Xoo) under greenhouse conditions in Pakistan
Bacterial leaf blight (BLB) is one of the apex devastating diseases of the rice crop around the world. It continuously reduced the yield and quality of rice. In this investigation efforts have been made to study the re...
Estimating effects of terrain attributes on local soil organic carbon content in a semi-arid pastureland
Soil organic carbon (SOC) is a source or sink of atmospheric carbon and importance of it has been increasingly recognized in soil physical, chemical and biological characteristics. The objective of this study was to pre...