首页 | 本学科首页   官方微博 | 高级检索  
   检索      

摩天岭北坡森林木本植物叶性状在物种和群落水平沿海拔梯度的变化
引用本文:何桂萍,田 青,李宗杰,宋玲玲,张守昊,曹雪萍,杨文娟.摩天岭北坡森林木本植物叶性状在物种和群落水平沿海拔梯度的变化[J].西北植物学报,2018,38(3):553-563.
作者姓名:何桂萍  田 青  李宗杰  宋玲玲  张守昊  曹雪萍  杨文娟
作者单位:甘肃农业大学林学院;兰州大学资源环境学院;两当县林业局林业工作站
基金项目:国家自然科学基金(31260122)
摘    要:该研究采用样线和样地相结合的方法,对甘肃省白水江国家级自然保护区摩天岭北坡大垭子梁森林不同海拔(1 600~2 100m)的植物群落进行野外调查、采样分析,并运用线性回归分析、Pearson相关性分析及曲线拟合分析方法,研究木本植物的比叶面积(SLA)、叶干物质含量(LDMC)、叶碳氮磷含量(LCC、LNC、LPC)及其计量比(C/N、C/P、N/P)等叶性状变化特征,以及在物种和群落水平随海拔梯度的变化趋势和相关性。结果表明:(1)摩天岭北坡大垭子梁山地森林为落叶阔叶林带,共有木本植物13科23种,其中乔木6种,灌木17种,且整体上灌木种类较为丰富。此外,有些物种在不同海拔间都有分布,如华北落叶松(Larix principis-rupprechtii)、胡枝子(Lespedeza bicolor)等,反映出不同植物对于异质环境的适应。(2)8个叶功能性状中变异系数最小的是LCC(4.6%),属于弱变异,最大的是SLA(42.1%),其他叶性状都属于中等变异,表明在其他叶性状的协同作用下,使得木本植物的碳获取保持在一定的水平以确保群落的稳定性。(3)叶片功能性状间的关联性普遍存在,是植物适应环境的一种对策.该研究表明SLA-LNC以及LNC-LPC在物种和群落水平上的相关性及其相关程度均一致,而其他叶性状间相关关系则有所不同,这为以后进行大尺度研究时对叶性状的选择提供了一定的依据。(4)叶性状随海拔的变化趋势,除C/N和N/P在物种和群落水平上变化趋势不一致外,其他各个性状随海拔的总体变化趋势基本一致,但显著程度只有LNC一致外其他均不同,反映了木本植物的不同叶片功能性状对海拔造成的不同环境的适应。

关 键 词:海拔  叶性状  物种水平  群落水平  摩天岭北坡

Change in Leaf Functional Traits of Woody Plants Along Altitudinal Gradients at Species and Community Levels on the Motianling Northern Slope
HE Guiping,TIAN Qing,LI Zongjie,SONG Lingling,ZHANG Shouhao,CAO Xueping,YANG Wenjuan.Change in Leaf Functional Traits of Woody Plants Along Altitudinal Gradients at Species and Community Levels on the Motianling Northern Slope[J].Acta Botanica Boreali-Occidentalia Sinica,2018,38(3):553-563.
Authors:HE Guiping  TIAN Qing  LI Zongjie  SONG Lingling  ZHANG Shouhao  CAO Xueping  YANG Wenjuan
Abstract:The study, using combination of sample lines and plots, carried out field investigation and sampling analysis of plant community at different altitudes in the Motianling northern slope Dayazi of Gansu Baishuijiang National Nature Reserve. Using linear regression analysis, Pearson correlation analysis and curve fitting analysis method, the study researched on specific leaf area (SLA), leaf dry matter content (LDMC), leaf carbon, nitrogen and phosphorus contents (LCC, LNC, LPC) and stoichiometric (C/N, C/P, N/P) change characteristic of woody plants. Besides, variation trend and correlation of leaf traits at species and community levels with elevation gradient. The results showed that: (1) at deciduous broad leaved forest belts on the Motianling northern slope Dayazi, there are 23 species of woody plants belonging to 13 families, including 6 trees and 17 shrubs. Among them, the species of shrubs are superfluous trees. In addition, a few species are distributed at different altitudes, such as Larix principis rupprechtii and Lespedeza bicolor, which reflect the adaptation of different plants to heterogeneous environments. (2) The coefficient of variation of leaf functional traits in the smallest is LCC (4.6%), SLA is the biggest (42.1%), of which only LCC variation is weak, and the other leaf traits belong to moderate variation. These show that the woody plant carbon gain is maintained at a certain level based on synergy in other leaf traits to ensure the stability of the community. (3) Correlation between leaf functional traits is widespread, which is a strategy of plant adaptation to environment. The study shows that the correlations between SLA LNC and LNC LPC are the same in species and community levels and the degree of correlation, and the correlation between other leaf traits are different, which provides a certain basis on selection of traits for future research. (4) The trend of leaf functional traits varied with altitude: apart from the variation trend of C/N and N/P at two levels, the other traits show basically the same trend with altitude at the species and community levels, but the significant degree of LNC was the same, the others were different. This phenomena reflects the adaptation of different leaf functional traits of woody plants to different environments at altitudes.
Keywords:elevation  leaf traits  species level  community level  Motianling northern slope
本文献已被 CNKI 等数据库收录!
点击此处可从《西北植物学报》浏览原始摘要信息
点击此处可从《西北植物学报》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