Tree ring studies from some conifers and present condition of forests of shangla district of Khyber Pakhtunkhwa, Pakistan | [Pakistan Journal of Botany • 2020]

Author(s):

1. JAVED IQBAL: Center for Plant Sciences and Biodiversity, University of Swat, Shangla Campus, Khyber Paktunkhwa, Pakistan

2. MOINUDDIN AHMED: Department of earth and Environmental system, Indiana State University, Terre Haute, IN, USA

3. MUHAMMAD FAHEEM SIDDIQUI: Department of Botany, University of Karachi, Karachi 75270, Pakistan

4. ADAM KHAN: Department of Botany, University of Buner, Khyber Pakhtunkhwa, Pakistan

Abstract:

Dendroecological investigations were carried out for different sites of Shangla District, using 3 conifer tree species i.e. Pinus wallichiana, Abies pindrow and Cedrus deodara. Wood samples were subjected to dendrochronological processes, analyzed under microscope and measured on Velmax measuring system attached to a computer. Growth rate at every 10 years interval were determined and its variation in various dbh classes were investigated. The present findings showed that age and growth rate varies from species to species and site to site, even among the individuals of a single species growing in a same site. It was shown that growth rate decreased after 18th century. It was observed that small dbh tree was not necessarily younger than large dbh trees. Present study shows that age increases roughly with increasing tree size but also agreed with previously workers that dbh is not a good indicator of age in multisized and multiaged population.

Page(s): 653-662

DOI: 10.30848/PJB2020-2(38)

Published: Journal: Pakistan Journal of Botany, Volume: 52, Issue: 2, Year: 2020

Keywords:

growth rate , Shangla , Pine trees , Velmax measuring system , Dendroecology

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