SPECIES RICHNESS ACROSS THE FOREST-LINE ECOTONE IN CENTRAL HIMALAYAN LANDSCAPE OF NEPAL A Dissertation Submitted to Central Department of Environmental Science, Tribhuvan University, Kirtipur, Kathmandu, Nepal For the Partial Fulfillment of Requirements for the Completion of Masters Degree in Environmental Science Submitted By Diwas Dahal Exam Roll No.: 456 T.U Regd. No.:5-2-37-541-2003 Central Department of Environmental Science Tribhuvan University Kirtipur, Kathmandu Nepal 2011 DECLARATION I, Diwas Dahal, hereby declare that the piece of work entitled "Species Richness across Forest- line Ecotone in Central Himalayan Landscape of Nepal" presented herein is genuine work done originally by me and has not been published or submitted elsewhere for a requirement of a Degree programe. Any literature, data works done by others and cited within this dissertation has been given due acknowledgement and listed in the references. ` ` Diwas Dahal
[email protected] ABSTRACT With the main objective of exploring the species richness and composition in forest-line ecotone together with altitudinal pattern in different slope aspect (north and south) this research was done in the transitional zone (Ecotone) of forest to non-forest landscape of Central Himalaya (Langtang) Nepal. Data were collected from 27 plots in the northern aspect and 21 plots in the southern aspect of 10m × 10m (altogether 48 plots combining both the aspect). Qualitative and quantitative analysis of environmental variables and disturbance indicator were also recorded in each sampling plot. Altogether 83 species and 93 species of vascular plants were recorded in the north and south aspect respectively. The data thus obtained were analyzed by using ordination technique, Canonical Correspondence Analysis (CCA), Detrented Correspondence Analysis and Regression Analysis.