Population structure, habitat preference and conservation threats of Ringshu Bamboo (Neomicrocalamus andropogonifolius) at Remung under Samdrup Jongkhar, Bhutan
Sangay Dorjee and Sushila Rai
Transect survey and systematic sampling plot size of 20 x 20 m was used for stand inventory of Ringshu bamboo (Neomicrocalamus andropogonifolius). A total of 34 soil samples were collected from the study area and examined in the laboratory to check the soil chemical properties. Conservation threats were identified using semi-structured questionnaire and focus group discussions. The population structure of >2 years old culm dominates in all sample plots followed by dead culms. Number of culm was found strongly correlated (r = .735, p< .05). The occurrence of Ringshu culm was found to be negatively correlated with the altitude (r = -.438, p = .01).The mean (M) soil chemical properties of pH 5.87 with moisture content of 4.15%, OC (Organic Carbon) of 1.93%, N(Nitrogen) of 0.10% and available phosphorus of 16.75 mg/kg was observed. Threats from domestic animal and illegal harvesting of young culms in the past had substantial impact on the management of Ringshu.The study found that slope of 51 to 70%, canopy cover of 61 to 70% and the North facing aspect was found more suitable for the growth of Ringshu.
KEYWORDS: Bamboo, clump, culm, density, management, unregulated.