Abstract
Phenology, the timing of various events in a species life cycle, is an important life history trait for both plants and animals. Dharali site situated in the highest altitudinal range i.e. 2800-3300 m above msl and showed the initiation of all the phenological characteristics i.e. leaf fall, leaf emergence, appearance of male and female strobili, pollination, cone maturation and seed dispersal in advance as compared to all the other sites. The comparison of the two years phenological data in all the sites (Mundali, Bhukki, Dheoban, Dharali) showed that in the year 2013 early leaf emergence, prolonged cone maturity and early seed dispersal were observed. Rise in temperature and change in climate in mountainous regions has caused the tree line to advance to higher elevations as temperatures have increased over the past few decades. In addition to changing their spatial distributions, plants are also chang-ing their temporal niches.
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