生态学报2025，Vol.45Issue(11)：5436-5451,16.DOI:10.20103/j.stxb.202407241752
子午岭天然次生林优势植物生态策略及叶片功能性状
Analysis of the CSR ecological strategies and leaf functional traits of dominant plants in the natural secondary forest of Ziwuling
摘要
Abstract
Plans have developed CSR ecological strategies——competitive(C),stress-tolerant(S),and ruderal(R)—to cope with various stressful environments and compete with other plants for resources by modulating their leaf functional traits.Ziwuling represents the only fully intact natural secondary forest habitat on the Loess Plateau,with research on the CSR ecological strategies of its dominant species being scarce.We conducted a systematic investigation into the ecological strategies of the ten dominant woody plants in Ziwuling's natural secondary forest using ten leaf functional traits,which revealed that the ten plants could be classified into three strategies:S,S/CS,and S/CSR,with S/CS and S/CSR strategies being dominant in the vegetation,accounting for 40.0％and 38.3％,respectively.Specifically,S plants exhibited characteristics such as low leaf nitrogen content(1.6-2.0)mg/L,leaf phosphorus content(0.13-0.17)mg/L,specific leaf area(1.0-1.9)m2/kg,δ15N(-1.36--1.12)‰,and high leaf thickness(0.08-0.13)mm.In contrast,S/CSR-type plants showed higher nitrogen content(2.6-3.0)mg/L,phosphorus content(0.18-0.22)mg/L,specific leaf area(2.5-3.7)m2/kg,leaf δ15N(-1.14--1.03)‰,and lower leaf thickness(0.05-0.11)mm,while S/CS plants had intermediate values for these traits.Principal component analysis(PCA)indicated that specific leaf area,leaf nitrogen content,leaf phosphorus content,and 815N were the main leaf functional traits that differentiated among strategies.The structural equation model further revealed that physiological,water,and nutrient factors played distinct roles in the formation of different ecological strategies.S-strategy plants were primarily influenced by nutrient and physiological factors,whereas C-strategy and R-strategy plants were influenced by the indirect effects of physiological and nutrient factors.This study suggests that dominant plants in Ziwuling's natural secondary forests adjust their resource acquisition capacity and allocation patterns by modifying leaf morphology,water,and nutrient uptake,resulting in ecological strategies adapted to various environmental conditions.关键词
竞争策略/耐胁迫策略/杂草策略/主成分分析/结构方程模型Key words
competitive strategy/stress-tolerance strategy/ruderal strategy/principal component analysis/structural equation model引用本文复制引用
张自炫,赵影,王力..子午岭天然次生林优势植物生态策略及叶片功能性状[J].生态学报,2025,45(11):5436-5451,16.基金项目
国家自然科学青年基金项目(42301039) （42301039）
国家自然科学基金面上项目(42171043,42377318) （42171043,42377318）
