Contributions to molecular phylogeny of lichens 3. •
New monophyletic branches of the Trapeliaceae and Xylariaceae
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A. S. Bagri
ajendrabagri@gmail.com
A. S. Bagri
Department of Botany, Pt LMS Campus, Sri Dev Suman Uttarakhand University, Rishikesh – 249201, Uttarakhand, India
Department of Botany & Microbiology, HNB Garhwal University, Srinagar Garhwal – 246174, Uttarakhand, India
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Department of Botany & Microbiology, HNB Garhwal University, Srinagar Garhwal – 246174, Uttarakhand, India
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A. Singh
A. Singh
High Altitude Plant Physiology Research Centre (HAPPRC), HNB Garhwal University, Srinagar Garhwal – 246174, Uttarakhand, India
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D. S. Rawat
D. S. Rawat
Department of Botany, Pt LMS Campus, Sri Dev Suman Uttarakhand University, Rishikesh – 249201, Uttarakhand, India
Department of Botany, SRT Campus, HNB Garhwal University, Badshahi Thaul, Tehri Garhwal – 249199, Uttarakhand, India
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Department of Botany, SRT Campus, HNB Garhwal University, Badshahi Thaul, Tehri Garhwal – 249199, Uttarakhand, India
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G. K. Dhingra
G. K. Dhingra
Department of Botany, Pt LMS Campus, Sri Dev Suman Uttarakhand University, Rishikesh – 249201, Uttarakhand, India
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Z. A. Wani
Z. A. Wani
Conservation Ecology Laboratory, Department of Botany, Baba Gulam Shah Badshah University, Rajouri – 185234, Jammu & Kashmir , India
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Forest regeneration is a natural process of forest resource reclamation through production of young ones (saplings and seedlings). Tree species show variable regeneration potential in different associations and response to natural and man-made factors. Banj oak (Quercus leucotrichophora A. Camus), one of the important forest forming tree species in western montane Himalaya, is facing regeneration failure in different locations. The present study attempted to assess the population structure and regeneration of Q. leucotrichophora and associated tree species in five different stands (sites) of a less explored region (Tehri Garhwal, Uttarakhand, Western Himalaya). To investigate the phytosociological attributes, ten sampling quadrats (400 m2) were laid in random sampling manner in each forest stand for surveying tree layer, 2 sub-quadrats (25 m2) for saplings, and 5 sub-quadrats (1 m2) for seedlings in each sampling quadrat. Among the studied forest stands, tree species richness ranged 8 to 11 (8.8±1.3), total stem density (ind/ha) 750 to 950 (846±85.6), and total basal area (m2/ha) 18.68 to 29.18 (24.1±3.9). Based on abundance data the banj oak showed ‘good’ regeneration statuses (density of seedling > saplings > adult trees) in all forests. The distribution of adult tree individuals into different size classes (DBH classes) also indicate ‘good’ regeneration pattern (higher density in lower size classes and gradual decrease in density towards higher classes or forming a reverse J-shaped pattern). However, majority of the banj oak associated species (e.g. Prunus cerasoides, Pyrus pashia, Rhododendron arboreum, etc.) represented ‘fair’ regeneration statuses (seedlings > or ≤ saplings ≤ adult trees). Overall, the results of this study shed light on the positive prospects for Q. leucotrichophora regeneration and the importance of sustainable coexistence between human communities and these vital forest ecosystems.
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