摘要
在南北样带温带区选择11个栎属(Quercus)树种的核心分布区,对各分布区内栎属建群树种的功能性状进行了测定,并对功能性状间的关系及其对气象因子的响应进行了分析,以期为气候变化背景下植物-环境关系的深入研究奠定基础。结果表明:虽然比叶重(LMA)和叶片干物质含量(LDMC)在反映栎属树种生活策略上有着异曲同工的作用,但是相比之下,LMA的作用略胜一筹;基于面积的叶片养分含量间的关系较基于质量的更为显著;除叶片单位面积磷含量(Parea)和单位面积钾含量(Karea)间关系外,无论是基于面积还是质量的叶片氮(N)、磷(P)含量间的正相关,均较两者与钾(K)含量间的正相关显著,这可能与K元素并不直接参与任何稳定结构物质的合成有关。温度和日照时数是影响功能性状间关系的主要气象因子,与基于质量的养分含量相比,基于面积的养分含量更易于受温度和日照时数的影响;降水仅仅影响叶片Parea与其他性状间的关系。
Aims We studied the relationships between functional traits of Quercus species and their responses to meteoro-logical factors in the temperate zone of the North-South Transect of Eastern China （NSTEC）,with the objective of finding the dynamics of the relationship between plants and environment. Methods We measured functional traits of Quercus dominant trees in their eleven core habitats in the temperate zone of NSTEC and analyzed relationships among the traits and their responses to meteorological factors. Important findings Although leaf mass per area （LMA） and leaf dry matters content （LDMC） could indicate life strategy of the Quercus trees,the implications of LMA was more obvious. The relationships among leaf nutrients based on area were more significant than those based on weight,and the relationships between leaf nitrogen and phosphorus contents were more significant than their relationships to potassium content except for the relationship between phosphorus content per leaf area （Parea） and potassium content per leaf area （Karea）. This could be interpreted that potassium does not take part in synthesizing stable structural materials directly in plants. Mean annual temperature （MAT） and mean annual sunlight （MASL） were the main meteorological factors that affected the relationships among functional traits. Compared to leaf nutrients based on weight,those based on area were affected more by MAT and MASL. Mean annual rainfall （MAR） had an effect only on the relationships between Parea and other traits.
出处
《植物生态学报》
CAS
CSCD
北大核心
2010年第6期619-627,共9页
Chinese Journal of Plant Ecology
基金
国家自然科学基金重大项目"中国陆地样带生态系统/植被格局变化的环境驱动机制(30590383)"
面上项目"高山植物叶片δ~(13)C海拔响应及其机理研究(30771718)"
林业公益性行业科研专项子专题"中国主要树种地理替代的环境驱动机制"
中国林科院中级公益性科研院所基本科研业务费专项资金项目"树木在纬度和海拔分布界限上的生理生态比较研究(CAFRIF200717)"资助
关键词
功能性状
生活策略
气象因子
栎属
南北样带温带区
functional traits
life strategy
meteorological factors
Quercus
temperate zone of NSTEC
