Floristic study and vegetation analysis in lower Kangchenjungha -Singhalila ride, Panchthar district, Eastern Nepal

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dc.contributor.authorPandey, Jeewan
dc.date.accessioned2023-06-26T09:28:31Z
dc.date.available2023-06-26T09:28:31Z
dc.date.issued2009
dc.description.abstractEastern Himalayas is one of the globally important sites representing the important hotspots of the South Asia. Floristic study was conducted in Lower Kangchenjunga Singhalila Ridge, Panchthar district East Nepal to explore the plant diversity and assess species composition of tree species along the elevation gradient. The study area covers five VDCs (Sidin, Prangbung, Memeng, Chyangthapu, and Falaincha) from the Panchthar district. Around 40 days were spent in field expeditions for plant species collection and vegetation sampling. Two extensive field trips were conducted during the research period. First pre-monsoon visit (4-18 June, 2007) was followed by second post-monsoon visit (16 September - 8 October, 2007). Sampling area was divided into three different sites bases on altitude and vegetations viz. Upper Temperate Forest (UTP), Lower Subalpine Forest (LSF), and Upper Subalpine Forest (USF). 63 quadrats (25 quadrats in UTF, 20 in LSF, and 18 in USF) were sampled in forest. Altogether 320 plants species belonging to five species of Gymnosperms (4 genera and 3 families), 271 species of Dicotyledonae (163 genera and 64 families), and 44 species of Monocotyledonae (37 genera and 16 families) were reported from the study area. The present study area was found to be dominated by Ericaceae with 23 species followed by Rosaceae (21). Six species (viz. Calamagrostis lahulensis, Begonia panchtharensis (New to world), Swertia wardii, Castanopsis longispina, Rubia hispidicaulis, and Acronema ioniostyles) have been recorded as new addition to Flora of Nepal. One endemic (Heracleum lallii) and 10 threatened species (viz. Nardostachys grandiflora, Swertia chirayita, Magnolia campbellii, etc.) also recorded from the study area. Archaic plant species like Magnolia campbelli, Taxus wallichiana, Myrica esculanta, and four species from family lauraceae were recorded from the area. Altogether 41 species of trees were recorded by sampling of 63 quadrats in three different elevation ranges. Lithocarpus pachyphylla was the dominant tree species with the highest importance value index (65.21) followed by Symplocos ramosissima (31.15) in UTF. Acer caudatum was the dominant tree species with the highest importance value index (42.29) followed by Sorbus foliolosa (37.25) in LSF. Similarly, Rhododendron companulatum was the dominant tree species with the highest importance value index (63.74) followed by Abies spectabilis (55.54) in USF. Tree species richness (α diversity per 100m2) was higher in UTF (5) than in LSF (4) and USF (3). Simpson’s index of dominance (C) for trees was higher in USF (0.185) followed by LSF (0.093) and UTF (0.088). Shannon-Wiener's index (H') was higher in UTF (3.980) followed by LSF (3.598) and USF (3.196). On the basis of recorded species, this can be concluded that the study area is rich in terms of plant resources and provides habitats for plant species in the sense that documented species are threatened, endemic, and archaic floral species. The community structures of all sites were quite distinct in terms of the contribution of dominant species. The decrease in tree diversity from Upper Temperate Forest to Upper Subalpine Forest is due to the increase in altitude and other environmental factors.en_US
dc.identifier.urihttps://elibrary.tucl.edu.np/handle/20.500.14540/18220
dc.language.isoen_USen_US
dc.publisherDepartment of Botanyen_US
dc.subjectFloristic studyen_US
dc.subjectVegetation Analysisen_US
dc.titleFloristic study and vegetation analysis in lower Kangchenjungha -Singhalila ride, Panchthar district, Eastern Nepalen_US
dc.typeThesisen_US
local.academic.levelMastersen_US
local.institute.titleCentral Department of Botanyen_US
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