Response of Phenological Events of Aesculus indica Colebr. to Climate Change Along an Altitudinal Gradient in Kumaun Himalaya, Uttarakhand
The present study investigated the timing and duration of phenological events of A. indica in different elevational range Kumaun Himalayan forest. A total of four sites at elevation ranging between 1,900m and 2,200m were selected and at each site 10 s were marked for observations. The phenological events, i.e. leaf bud formation, leaf bud busting, leafing, flowering bud formation, flowering bud busting, flowering, fruit/seed formation, seed fall and leaf fall were monitored. Phenological duration and asynchrony of these phenophases were determined at 10 day intervals and every 2-3 day intervals during the period of peak activities. The minimum length displayed leaf bud formation (44 days) and maximum by leaf fall (86 days) across the elevation. The environmental conditions, particularly temperature, affected the phenological patterns of A. indica. The leaf bud busting activity of A. indica was 51 days. Flowering activity started on May 1st and was extended over 76 days until July 15th. Seed fall activity was extended over 66 day across elevations. ANOVA showed the longevity of phenophases were varied significantly respective to elevations (p<0.05). Our observation showed that all the phenological events of A. indica appear early at lower (1900 m) and are delayed with increasing elevation. All corresponding phenological events were earlier at lower elevations because the optimum (9.0 to 19.5°C) is met earlier in these conditions.
Copyright (c) 2018 International Journal of Environment
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The author(s) acknowledge that the manuscript submitted is his/her/their own original work; all authors participated in the work in a substantive way and are prepared to take public responsibility for the work; all authors have seen and approved the manuscript as submitted; the manuscript has not been published and is not being submitted or considered for publication elsewhere; the text, illustrations, and any other materials included in the manuscript do not infringe(plagiarism) upon any existing copyright or other rights of anyone.
Notwithstanding the above, the Contributor(s) or, if applicable the Contributor’s Employer, retain(s) all proprietary rights other than copyright, such as Patent rights; to use, free of charge, all parts of this article for the author’s future works in books, lectures, classroom teaching or oral presentations; the right to reproduce the article for their own purposes provided the copies are not offered for sale.
The copyright to the contribution identified is transferred to IJE.