温度升高对林线交错带西川韭与草玉梅生殖物候与生长的影响  

Effects of elevated temperature on reproductive phenology and growth of Allium xichuanense and Anemone rivularis in timberline ecotone

作　　者：李小艳[1,2] 张远彬[1] 潘开文[1] 孙成仁[2] 王开运[3] 王进闯[1] 亓东明[2] 

机构地区：[1]中国科学院成都生物研究所,成都610041 [2]西华师范大学,四川南充637002 [3]华东师范大学上海市城市化生态过程和生态恢复重点实验室,上海200062

出　　处：《生态学杂志》2009年第1期12-18,共7页Chinese Journal of Ecology

基　　金：国家自然科学基金资助项目(90511008和90202010)

摘　　要：采用开顶式同化箱(open-top chamber,OTC),研究了川西亚高山林线交错带2种草本植物西川韭(Alllium xichuanense)与草玉梅(Anemone rivularis)生殖物候与生长对模拟增温的短期响应。结果表明:温度升高使西川韭与草玉梅的始花时间、最大开花日和抽茎时间均明显提前;同时,增温延长了2物种的花期,提高了二者的开花率;增温促进了草玉梅的果物候;增温加快了西川韭与草玉梅的生长,而对生长末期株高和各器官生物量却无显著影响。反映了西川韭与草玉梅生殖物候与生长对实验增温的响应具有较强可塑性,在未来气候变暖的情况下,能够较强地适应变暖环境。By using open-top chamber （OTC）, the short-term effects of simulated warming on the reproductive phenology and growth of two perennial herbaceous species Allium xichuanense and Anemone rivularis in subalpine timberline ecotone of Western Sichuan were investigated. The results showed that wanning made the dates of initial flowering, maximum flowering, and bud- shooting advanced obviously, and prolonged the duration of flowering and increased the blosso- ming rate. Warming also advanced the fruit phenology of A. rivularis and promoted the growth of A. xichuanense and A. rivularis. However, no significant effects were observed on the plant height and organ biomass by the end of growth season. It is suggested that A. xichuanense and A. rivularis had stronger plasticity in response to simulated warming, and could easily adapt to the intending global wanning.

关 键 词：温度升高 开花物候 生殖 生长 林线交错带 

分 类 号：Q948[生物学—植物学]