森林与环境学报2026，Vol.46Issue(2)：169-177,9.DOI:10.13324/j.cnki.jfcf.202508005
元江干热河谷植物枝叶功能性状的海拔变异及权衡
Variations and trade-offs of branch and leaf functional traits in plants along altitudes in Yuanjiang dry-hot valley
摘要
Abstract
To investigate the ecological adaptation strategies of dominant plants to altitudes in the Yuanjiang dry-hot valley,this study focused on 13 dominant species(five tree species,six shrub species,and two herb species)across four altitudinal zones in the Yuanjiang National Nature Reserve of Yunnan Province.Six functional traits of current-year twigs were measured,including twig cross-sectional area,volume-based leafing intensity,specific leaf area,leaf dry matter content,blade thickness,and branch length.One-way analysis of variance and principal component analysis were conducted to explore the variations and trade-offs of functional traits among different altitudes.The results revealed that the total variations in the functional traits of branches and leaves of dominant plants across different altitudes ranged from 3.3%to 144.0%.For arbor and shrub species,the twig cross-sectional area,volume-based leafing intensity,and leaf dry matter content exhibited strong variations ranging from 53.5%to 144.0%,while blade thickness showed weak variations ranging from 11.2%to 18.3%.The plant economic spectrum constructed based on principal component 1,which had a high contribution rate,indicated that both arbor and shrub species shifted from acquisition-oriented to conservation-oriented resource utilization strategies as the altitude raised,whereas herb species exhibited the opposite pattern.关键词
干热河谷/海拔/枝叶功能性状/经济谱/资源利用策略Key words
dry-hot valley/altitude/functional traits of branches and leaves/economic spectrum/resource utilization strategy分类
农业科技引用本文复制引用
陈芳芳,秦科超,陈超,赵雪利..元江干热河谷植物枝叶功能性状的海拔变异及权衡[J].森林与环境学报,2026,46(2):169-177,9.基金项目
云南省兴滇英才支持计划青年人才项目"干热河谷豆科植物多样性及适应性进化研究"(XDYC-QNRC-2023-0228) （XDYC-QNRC-2023-0228）
西南林业大学林学云南省一流建设学科"西南地区干热河谷木蓝属植物的适应性进化研究"(LXXK-2025M26). （LXXK-2025M26）
