Flowering Phenology of Rhododendron arboreum Sm. at Two Elevations in Phawngpui National Park, Mizoram: Climate Change Implications

B Malsawmkima, Uttam Kumar Sahoo

Abstract


We studied flowering phonological events of Rhododendron arboreum Sm. at two altitudes (1945 m and 2157 m asl) in Phawngpui National Park for 4-years period. Our results revealed that all the flowering phenophases (onset, peak and end) were significantly influenced by altitude mediated atmospheric temperature and soil surface temperature. The low altitude which experienced higher surface and atmospheric temperature induced early onset of flowering of this species by 9-16.days, peak flowering by 7-9 days and showed better flowering synchrony and higher flowering amplitude compared to those plants at high altitude. However, flowering duration was not affected by the variations in temperature induced by altitude. These findings provide clues for climate change influence on the altering phonological pattern of this species.


Keywords


Rhododendron, Flowering phenology, phonological synchrony, climate change, Phawngpui National Park, Mizoram

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