PJB-2017-746
Ring width characteristics of 4 pine tree species from highly disturbed areas of moist temperate Hills of Murree.
Afsheen Khan
Abstract
Abstract: Observational and quantitative ring width characteristics of 4 pine species i.e. 1. Abies pindrow, 2. Cedrus deodara, 3. Pinus wallichiana, 4. Pinus roxbhurgii from highly disturbed sites of Murree Hills were presented. From each pine tree species wood (cores) samples were collected, prepared in the laboratory, studied under microscope and measured by Velmex measuring machine attached with the computer. Dendrochronological techniques were followed in the study. All four species showed clear ring boundaries, distinct ring without any missing or locally missing rings while double or false rings were recorded in Pinus roxbhurgii and Pinus wallichiana only. Wide or complacent rings were common in each species. Ring width pattern was cross dateable within species with some common narrow rings were also recorded among the species. Cores show poor correlation with master chronology of each species. Highest mean ring width (3.40) was recorded in Cedrus deodara while lowest in Pinus roxbhurgii. Unfiltered Autocorrelation was from 0.515 to 0.585 and mean sensitivity ranged from 0.37 (Cedrus deodara) to 0.433 (Abies pindrow). It is shown that observational characteristics are similar to undisturbed sites while correlation with master chronology were extremely poor if compare with trees of undisturbed site. No difference was recorded in other quatitative characteristics between disturbed and undisturbed pine species.
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