首页 | 本学科首页   官方微博 | 高级检索  
     

内蒙古克氏针茅草原植物物候及其与气候因子关系
引用本文:张峰,周广胜,王玉辉. 内蒙古克氏针茅草原植物物候及其与气候因子关系[J]. 植物生态学报, 2008, 32(6): 1312-1322. DOI: 10.3773/j.issn.1005-264x.2008.06.012
作者姓名:张峰  周广胜  王玉辉
作者单位:(中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093)
基金项目:国家自然科学基金,国家杰出青年科学基金
摘    要: 植物物候作为气候变化敏感的生物圈指示计, 已经成为全球变化研究的热点。利用1985~2002年地面物候观测数据, 构建了内蒙古克氏针茅(Stipa krylovii)草原植物物候的时间序列谱, 并分析了植物物候的时间变异与气候因子之间的相关关系。结果表明: 1) 从1985~2002年内蒙古克氏针茅草原的气候朝着暖干趋势发展, 主要表现在春、夏气温的显著性增加与秋季(9月)降水的显著性减少; 2) 主要植物物候的变化整体呈返青期推后其它物候期提前趋势; 3) 植物生长盛期(7、8月)对气候变化最敏感; 4) 光照和温度是影响内蒙古克氏针茅草原植物物候格局的主要因素, 年内最寒冷的1月月均温和2、3月的光照对春季返青期具有负效应, 而其它物候期与7、8月的光照则呈显著的负相关关系, 6、7月的降水对发育盛期的花序形成、抽穗与开花具有显著的负效应, 8、9月的降水量能显著推后枯黄期的结束, 从而有利于生长季的延长。

关 键 词:气候变化  植物物候  克氏针茅草原  内蒙古

PHENOLOGICAL CALENDAR OF STIPA KRYLOVII STEPPE IN INNER MONGOLIA,CHINA AND ITS CORRELATION WITH CLIMATIC VARIABLES
ZHANG Feng,ZHOU Guang-Sheng,WANG Yu-Hui. PHENOLOGICAL CALENDAR OF STIPA KRYLOVII STEPPE IN INNER MONGOLIA,CHINA AND ITS CORRELATION WITH CLIMATIC VARIABLES[J]. Acta Phytoecologica Sinica, 2008, 32(6): 1312-1322. DOI: 10.3773/j.issn.1005-264x.2008.06.012
Authors:ZHANG Feng  ZHOU Guang-Sheng  WANG Yu-Hui
Affiliation:State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
Abstract:Aims Recent studies, including field measurements, satellite-derived vegetation indices and simulations from a dynamic vegetation model, have demonstrated that global warming is influencing plant growth and phenology. Changes in plant phenology have considerable consequences for ecosystem function, but information on responses of plant phenology to climate change is lacking, especially in a community setting. Therefore, to accurately predict the future responses of plants to climate variation, a through understanding of plant phenological cycles and their relationships to light, temperature and precipitation is required. Methods We compiled a phenological calendar with 31 phenophases of budding, inflorescence, tasselling, flowering, fruiting and senescence for Leymus chinensis, Stipa krylovii, Cleistogenes squarrosa, Allium anisopodium, Artemisia frigida, Heteropappus altaicus and Artemisia scoparia for semi-arid Stipa krylovii steppe in Inner Mongolia from 1985 to 2002. Relationships among phenophases, variability, and climatic driving were examined using correlation analysis. Important findings The climate of Stipa krylovii steppe exhibited a trend for warming and drying, with significantly increased air temperature in spring and summer and markedly decreased precipitation in autumn. Linear regression analysis indicated that spring phenophases occurred later and summer and autumn phenophases moved earlier. Phenophases in July and August with higher temperature were the most sensitive to climate change. Plant phenology was primarily controlled by light and air temperature. Phenophases of budding were highly correlated with canopy light interception in February and March and with air temperature of the coldest month, January. Other phenophases, from inflorescence, tasselling, flowering, fruiting to senescence, were negatively correlated with canopy light interception in July and August, and precipitation in June and July was negatively related to inflorescence, tasselling and flowering. The timing of senescence was postponed by precipitation in August and September, which promoted lengthening of the growing season.
Keywords:climate change  plant phenology  Stipa krylovii steppe  Inner Mongolian
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《植物生态学报》浏览原始摘要信息
点击此处可从《植物生态学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号