Blue pine (Pinus wallichiana) forest stands of Garhwal Himalaya: composition, population structure and diversity
2003
Bhandari, B. S.
The study reports the composition, population structure and diversity of blue pine (Pinus wallichiana) forest stands of Garhwal Himalaya with special reference to altitude and aspect. A total of four sites were studied, of which two were on the southeast and the other two on the northwest facing slopes. Pinus wallichiana was the dominant tree species; however, competition was observed on the northwest upper slope. Higher species richness wasnoticed in the sapling and seedling layers. Herberts aristata, Cotoneaster affinis, Pyracranthacrenulata and Pyrus pashia were the dominant shrub species. Tree layers had a similarityof 43.30 to 82.92%. The higher degree of dissimilarity between the lower gradients ofopposite aspects indicated a significant change jn the community structure due tovariation in aspect conditions. Species diversity (H) ranged from 0.73 to 1.60,1.71 to2.53,1.83 to 2.47 and 1.87 to 2.33 for tree, sapling, seedling and shrub layers respectively.Among the different strata, within the present study area, the tree stratum showedcomparatively greater habitat specialization owing to the higher value of beta-diversitythan the saplings, seedlings and/or shrubs.
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