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Distribution of orchid (Coelogyne nitida) and its associated host tree species in Naulo Charchare Community Forest, Kaski, Central Nepal
Pooja Koju Shrestha, Keshab Raj Rajbhandari

Last modified: 2017-08-20



Orchidaceae is one of the species riches families of plants comprising of five subfamilies, 880 genera and more than 25,000 species in the world. The pseudo bulb of C. nitida is used for medicinal purpose and its beautiful flower for ornamental purpose. The habitat destruction, degradation resulting from different activities of local people and high market value of C. nitida has threatened the species richness of C. nitida. Orchids are considered as flagship species in biological communities and its protection can cause the umbrella effect in conservation of other species. So, this study is important for understanding the distribution pattern and further conservation and management plans in Naulo Charchare community forest, Kaski. The main aim of this study is to study the distribution pattern of orchid (C. nitida), its associated host tree species in Naulocharchare community forest and people’s perception in the conservation of C. nitida. The belt transect method was used to collect the primary data in the field. Seventy plots were studied and in each plot variables as host tree species, DBH, sunlight intensity, rugosity and height where C. nitida was present were noted down. To evaluate the people’s perception in the conservatio schedule survey for 55 respondents were done (using Arkin and Colton, 1963). The host preference was found to be D. himalensis , DBH 20-30 as this is the largest DBH of old growth tree of D. himalensis. Similarly, sunlight intensity of 20-40% and 40-60% was favoured because in shady parts its parts experience light limitation or at high light condition may cause tissue damaged. Rough bark was mostly preferred as it retains more moisture and helps in seed establishment. It preferred middle zones of host tree as host tree offer larger surface area in this zone and increases the interception of the dispersed seeds in this area. Corrplot using R-studio was done to understand the correlation between different variables. Principle Component Analysis (PCA) was done using rda function using R-studio to understand the variation between different variables.  The status of C. nitida was found decreasing by 51% of the respondents. The major cause of decline was due to frequent extraction (36%), road construction (29%), deforestation (21%) and lack of awareness (14%). Education and knowledge about CITES and illegal trade was found positively correlated with p value 0.00017. Therefore, it was found that the abundance of C. nitida is dependent upon host tree species, DBH, sunlight intensity and rugostiy of bark. Old and large trees with rough bark should be protected as it the preferred host for C. nitida. Frequent extraction should be minimized in order to protect C. nitida.

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