Analysis of forest vegetation in Binsar Wildlife Sanctuary, Kumaun Himalaya, Uttarakhand, India
Ashaq Hussain khan, Dhani Arya
Forest vegetation and regeneration were studied along different aspects and altitudinal gradient in Binsar wildlife sanctuary Almora district of Uttarakhand Himalaya (India) using standard phytosociological random sampling quadrat method. A total of six stands were laid. The result reveals that the along different altitudes and aspects a total of ten tree species were recorded. Across the stands, the total tree density ranged between 300-560 Ind/ha, sapling density between 20 to 380 Ind/ha and seedling density from 640 to1880 Ind/ha. The shrub density varied from 540 to 8520 Ind/ha. Pinus roxburghii was the dominant species on western, southern, eastern and western facing aspects with IVI 135.32, 218.41, 214.63 and 167.06 respectively. While Lyonia ovalifolia and Quercus leucotrichophora were the most dominant species on the northern and eastern facing aspects respectively. Across the stands, total basal area and diversity of tree layer ranged from 26.66-117.41 m2/ha and 0.45-1.57 respectively. The regeneration of Pinus roxburghii and Myrica esculenta was excellent. The Pinus roxburghii was shown good regeneration even in northern and eastern facing aspects. The occurrence and increasing regeneration of Pinus roxburghii in these aspects might be due to global warming as this species requires warm and drier slopes for growth. Whereas The Quercus leucotrichophora had a complete absence of complete absence of saplings and decrease of young tree classes, but greater proportion of individuals in seedling class, indicates that seedlings from recent past had failed to attain sapling class, if the trend continues; the populations of species will decrease in near future.