| Regeneration ecology and population status of a critically endangered and endemic tree species （Ilex khasiana Purk.） in north-eastern India |
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| 摘 要： |
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| 关 键 词： | 人口结构 再生能力 特有树种 生态 东北部 幼苗存活率 冬青 濒危 |
Regeneration ecology and population status of a critically endangered and endemic tree species (Ilex khasiana Purk.) in north-eastern India |
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| Authors: | Upadhaya Krishna Barik Saroj Kanta Adhikari Dibyendu Baishya Ratul Lakadong Nigyal John |
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| Institution: | (1) Division of Environmental Science, Department of Basic Sciences and Social Sciences, School of Technology, North - Eastern Hill University, Shillong, 793 022, India;(2) Centre for Advanced Studies in Botany, School of Life Sciences, North - Eastern Hill University, Shillong, 793 022, India |
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| Abstract: | Detailed studies on population structure and regeneration ecology of Ilex khasiana were carried out at five representative natural populations i.e. Mylliem (Population - I), Upper Shillong (Population - II),
Shillong Peak (Population - III), Laitkor (Population - IV) and Nongpiyur (Population - V) to probe into the responsible affecting
factors for its population structure and regeneration ability in these populations. Experimental observation under three controlled
light conditions (full sunlight (100%), intermediate sunlight (50%) and low sunlight (30%)) showed that the growth status
and survival rates of seedlings under intermediate and low light were better than those under the high light condition. The
density-diameter distribution in population of adult trees (≥5cm dbh) exhibited a typical character of a regenerating population.
A higher seedling mortality rate in natural populations of I. khasiana was most probably due to increase in light intensity following vegetation destruction and other anthropogenic disturbances
that cause opening of forest canopy. The findings of the present study would be of immense value in formulating appropriate
conservation measures for the species. |
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| Keywords: | Ilex khasiana endangered species population status regeneration north-eastern India |
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