Response of woody plant phenophases to climate change for recent 30 years in Guiyang
Received date: 2009-04-11
Revised date: 2009-08-26
Online published: 2009-11-25
Supported by
国家自然科学基金项目 (40625002 ,40871033);中国科学院知识创新重要方向项目 (KZCX2-YW-315)
By using observed phenological and meteorological data from 1978 to 2007 at Guiyang station, the variation of 71 woody plants' five primary phenophases and their responses to climate change were analyzed, especially focused on the link between phenophases changes and climate changes before the phenophase onset, including leaf bud sprouting, first leaf unfolding, first flowering, leaf fully coloring and leaf fully defoliation. Conclusions are obtained as follows. 1) Since 1978, the mean annual temperature has dropped in oscillations totally, and decreased sharply after 2000, of which summer (June to August) temperature declined markedly, but spring (February to April) temperature had no clear variation except a slight increase of February temperature. 2) Three spring phenophases showed advancement generally, with advancement of 17 days for leaf bud sprouting, advancement of 15.5 days for first leaf unfolding and advancement of 16.7 days for first flowering during the past 30 years. But in the meantime, autumn phenophase delayed, with 19 days deleyed in leaf fully coloring and 14.3 days postponed of leaf fully defoliation. 3) Statistically significant correlation was found between the changes of spring phenophases and the mean temperature of one or several months before the phenophase onset, and the mean monthly temperature of February was the key indicator to the three spring phenophases. With 1℃ increase of monthly temperature of February, leaf bud sprouting, first leaf unfolding and first flowering advanced 3.4 days, 3.3 days and 3.1days, respectively. In addition, the sunshine duration change in February or March also played an important role in advancement of spring phenophase. 4) The variation of phenophases in autumn and winter had no clear relationship with the monthly temperature, precipitation and sunshine duration respectively, due to the complexity of the autumn phenological variations and wide influence on them.
Key words： woody plant; phenophase; climate change; response
BAI Jie, GE Quan-sheng, DAI Jun-hu . Response of woody plant phenophases to climate change for recent 30 years in Guiyang[J]. GEOGRAPHICAL RESEARCH, 2009 , 28(6) : 1606 -1614 . DOI: 10.11821/yj2009060016
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