摘要
研究高寒地区植被在气候变化下的反应与适应等过程成为众多科学家所关注的问题。植物生长与物候是对气候变化敏感且易观测的指标,为更好得了解高寒地区植被生态系统对全球气候变化的响应机制,文中基于已有的研究并结合自己的实验分析了气候变暖对高寒地区植物生长与物候的影响。分析指出:1)温度升高对高寒植被有正效应,而温度持续升高,则对植被产生负效应,但增温效应都未达到显著水平,说明短期增温对该植被影响不显著;2)较高海拔地区(4500m)的植物高度有增加趋势,而较低海拔地区(3400m)的植物可能出现矮化;3)在高寒生态系统,温度升高能够加快植物物候进程,延长生长季,但物候的改变也会给其带来生存风险。
Climate warming has become a credible fact due to the long-term effects of natural factors and human activities.Qinghai-Tibetan Plateau（QTP） has been considered as an ideal place to study the responses of terrestrial ecosystem to global climate change.Alpine meadows of QTP are extremely fragile and significantly sensitive to climate warming.The growth and phenology of alpine plants are the sensitive indictors to climate change and can be measured easily.The effects of climate warming on growth and phenology of alpine plants were analyzed.The conclusions were as follows：1）Warming had a positive effect to alpine meadow of QTP,but it would turn to negative effect with temperature increasing.However,both effects were not significant,which tested that the warming effect to alpine meadow of QTP was not significant in a short time（one year）.2）The height of plants trended to increas with the elevated temperature in high-elevation regions（4500m）,and it would turn to decrease in low-elevation regions（3400m）.3）The elevated temperature could speed up the progress of plants phenology and extended the growing season in alpine ecosystem.However,the changes of phenology brought survival risk to plants either.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2013年第3期137-141,共5页
Journal of Arid Land Resources and Environment
基金
中国科学院百人计划项目(Y027581001
Y027581002)资助
关键词
气候变暖
增温
高度
物候
climate warming
experimental warming
height
phenology
