Welcome to International Network for Natural Sciences | INNSpub

Paper Details

Research Paper | February 1, 2020

| Download

Estimation of Age and Growth Rate of Pinus gerardiana Forest Trees, Wildly Grown in Shinghar Zhob Area Balochistan-Pakistan by Using Dendro-chronological Approach

Qulam Khan Safi, Atta Muhammed Sarangzai, Saadullah Khan Leghari, Kanval Shaukat

Key Words:

Int. J. Biosci.16(2), 436-443, February 2020

DOI: http://dx.doi.org/10.12692/ijb/16.2.436-443


IJB 2020 [Generate Certificate]


The aim of study was to determine the age and growth rate of Pinus gererdiana trees which are wildly grown in Shinghar Zhob Area of Balochistan-Pakistan through different Dendro-chronological Approach. Wood samples in the form of cross-sections and cores were obtained from 40 living Pinus gerardiana trees to determine their age, growth rates and ring width characteristics from all sites of the study area. Results showed that the age and growth rates varied greatly from tree to tree and site to site and even in the same sized trees. Rings of this species were annual nature with distinct and clear ring boundaries. Cross dating was not achieved only in young trees in while old trees were mostly rotten in the centre and showed poor matching. The presence of false rings, missing rings, wedge out, lack of ring pattern consistency and lobate growth around the tree was observed in Pinus gerardiana. The result indicated that at least 4 cores, a suitable site-selection and sample of tree rings in the form of trunks section may improve ring with characteristics and can successfully be used in dendrochronological studies. It is shown that largest tree, in terms of diameter, is not necessarily the oldest. Highest growth rate in Pinus gerardiana in years/cm and cm/year was recorded at locations Zarjangal and Branga while the lowest was found from the Marmanda Ghar and three other sites also.


Copyright © 2020
By Authors and International Network for
Natural Sciences (INNSPUB)
This article is published under the terms of the Creative
Commons Attribution Liscense 4.0

Estimation of Age and Growth Rate of Pinus gerardiana Forest Trees, Wildly Grown in Shinghar Zhob Area Balochistan-Pakistan by Using Dendro-chronological Approach

Agren J, Zackrisson O. 1990. Age and size structure of Pinus sylvestris populations on mires in central and northern Sweden Journal of Ecology 78, 1049-1062.

Ahmed M. 1989. Tree-ring chronologies of Abies pindrow (Royel) Spach, from Himalayan region of Pakistan. Pakistan Journal of Botany 21, 347-354.

Ahmed M, Sarangezai AT. 1991. Dendrochronological approach to estimate age and growth rate of various species from Himalayan region of Pakistan. Pakistan Journal of Botany 23, 78-79.

Ahmed M, Wahab M, Khan N, Siddiqui MF, Khan MU, Hussain ST. 2009. Age and growth rates of some Gymnosperms of Pakistan: A dendrochronological approach. Pakistan Journal of Botany 41, 849-860.

Castagneri D, Storaunet KO, Rolstad J. 2013. Age andgrowth patterns of old Norway spruce trees in Trillemarka forest, Norway. Science Journal for Research 28, 232-240.

Cook ER, Kairiukstis LA. 2010. Methods of Dendrochronology: Applications in the environmental sciences. Kluwer Academic Publishers, AA Dordrecht, the Netherland, p 249,

Cook ER, Krusic PJ, Jones PD. 2003. Dendroclimatic signals in long tree-ring chronologies from the Himalayas of Nepal. International Journal of Climatology 23, 707–732.

Currie DJ. 1991. Energy and large scale patterns of animal and plant species richness. The American Naturalist 137, 27-49.

Fricker JM, Chen HYH, Wang JR. 2006. Stand age structural dynamics of North American boreal forests and implication for forest management. Atypon 8, 395-405.

Hussain A, Ahmed M, Khan SW, Abbas H, Hussain A, Abbas Q. 2018. Agroforestry practices in relation to the age and growth rate patterns of Picea smithiana using modern techniques of dendrochronology from Istak valley of central Karakoram National park (CKNP) Gilgit-Baltistan, Pakistan. Pakistan Journal of Agrictural Science 55, 569-574.

Iqbal J, Ahmed M, Siddiqui MF, Khan A, Wahab M. 2017. Age and Radial growth analysis of Conifer tree species from Shangla, Pakistan. Pakistan Journal of Botany 49, 69-72.

Khan A, Ahmed M, Siddiqui MF, Iqbal J, Gaire NP. 2018. Dendrochronological potential of Abies pindrow royle from Indus Kohistan, Khyber Pakhtunkhwa (kpk) Pakistan. Pakistan journal of botany 50, 365-369.

Lafon CW, Speer JH. 2002. Using dendrochronology to identify major ice storm events in oak forests of southwestern Virginia, Climate Research 20, 41-54.

Lanner RM. 2002.Why do trees live so long? Age. Research Rev 1(53), 67.

Rentch, JS, Fajvan MA, Hicks RRJR. 2003. Oak establishment and canopy accession strategies in five oldgrowth stands in the central hardwood forest region. For. Ecology and Management 184, 285-297.

Sarangzai AM, Ahmed A. 2011. Dendrochronological potential of Juniperus excelsa (M.Bieb) from dry temperate forest of Balochistan province, Pakistan. FUUAST Journal of Biology 1, 65-70.

Schweingbruber FH. 1998. Tree Rings: Basics and Applications of Dendrochronology. D. Reidel, Dordrecht, the Netherlands 276, p.

Siddiqui MF, Shaukat SH., Ahmed M, Khan N, Khan IA. 2013. Age and growth rates of dominant conifers from moist temperate areas of Himalayan and Hindukush region of Pakistan. Pakistan journal of botany 45, 1135-1147.

Wils THG, Eshetu Z. 2007. Reconstructing the flow of the River Nile from Juniperus procera and Prunus africana tree rings (Ethiopia) an explorative study on cross-dating and climate signal TRACE 5, 277-284.

Worrell R, Malcolm DC. 1990. Productivity of Sitka spruce in Northern Britain. 1. The effects of elevation and climate. Forestry 63, 105-118.

Zafar MU, Ahmed M. 2014. The status of tree-ring analysis in Pakistan. FUUAST journal of. Biology 4, 13-19.


Style Switcher

Select Layout
Chose Color
Chose Pattren
Chose Background