干旱区研究

干旱区研究 >

2025 , Vol. 42 >Issue 3: 480 - 488

DOI: https://doi.org/10.13866/j.azr.2025.03.08

植物生态

河西走廊荒漠植物优势种叶片功能性状变异及权衡

  • 李善家 ,
  • 李来周 ,
  • 缪潆祥 ,
  • 苟伟 ,
  • 苏培玺
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  • 1.兰州理工大学生命科学与工程学院，甘肃 兰州 730050
    2.中国科学院寒旱区陆面过程与气候变点实验室，甘肃 兰州 730000
李善家（1980-），男，教授，博士，主要从事植物逆境生理生态及其分子进化的结构与功能生物学机制.
E-mail: lishanjia@lut.edu.cn

收稿日期: 2024-07-08

  修回日期: 2024-11-18

  网络出版日期: 2025-03-17

基金资助

国家自然科学基金项目(41961007);中国科学院寒旱区陆面过程与气候变化重点实验室开放基金项目(LPCC2023003)

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Variation and trade-offs in leaf functional traits of dominant desert plant species in Hexi Corridor

  • LI Shanjia ,
  • LI Laizhou ,
  • MIAO Yingxiang ,
  • GOU Wei ,
  • SU Peixi
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  • 1. School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China
    2. Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China

Received date: 2024-07-08

  Revised date: 2024-11-18

  Online published: 2025-03-17

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摘要

河西走廊不同生活型植物叶片功能性状的变异特征及其权衡关系对保持该地区生态系统稳定具有重要意义。为了解不同生活型植物对干旱环境的适应机制及其生态适应策略，沿河西走廊由东南向西北自然降水递减梯度设置东段、中段、西段调查样地，选取26种优势荒漠植物，其中灌木14种，草本12种，分析了14项叶片关键功能性状的变异特征和区域格局，探讨了叶片功能性状间的权衡关系与适应策略。结果表明：（1） 河西走廊荒漠植物优势种叶片束缚水含量（BW）、碳磷比（C:P）、植株高度（H）、叶片自由水含量（FW）变异系数超过100%。（2） 河西走廊东、中、西段不同区域植物表现出多样化的生存策略，东段灌木、草本植物在叶经济谱（LES）中的位置更靠近“缓慢投资-收益”型物种一端，中段灌木位于LES“缓慢投资-收益”型物种一端，草本则更靠近“快速投资-收益”型物种一端，西段灌木在资源丰富条件下采取“快速投资-收益”型策略，草本植物则在不利的土壤条件下采取“缓慢投资-收益”型策略。综上所述，植物生存策略受多种生态因素影响，通过性状间的优化组合与资源权衡分配实现对干旱环境的适应。

关键词： 荒漠植物; 功能性状; 叶经济谱; 河西走廊

本文引用格式

李善家 , 李来周 , 缪潆祥 , 苟伟 , 苏培玺 . 河西走廊荒漠植物优势种叶片功能性状变异及权衡[J]. 干旱区研究, 2025 , 42(3) : 480 -488 . DOI: 10.13866/j.azr.2025.03.08

Abstract

The characteristics of variation in leaf functional traits of different plant types (shrubs, herbaceous plants) in Hexi Corridor and the relationships between these functional traits are extremely important for maintaining the stability of the ecosystem in this region. To explore the mechanisms of adaptation and the ecological strategies of different plant life forms in arid environments, we established survey sites in the eastern, central, and western sections along Hexi Corridor, following a gradient of decreasing natural precipitation from southeast to northwest. We selected 26 dominant desert plant species, including 14 shrubs and 12 herbaceous plants, and analyzed their variability and regional patterns of 14 key leaf functional traits. We also investigated the trade-offs and adaptive strategies among these traits. The following results were obtained: (1) The coefficient of variation for leaf-bound water content (BW), carbon to phosphorus ratio (C:P), plant height (H), and leaf free water content (FW) of dominant desert plant species in the Hexi Corridor exceeds 100%. (2) Plants in different regions of Hexi Corridor displayed diverse survival strategies: plants in the eastern section adopted a “slow-return” strategy, shrubs and herbaceous plants in the central section exhibited “slow-return” and “fast-return” strategies respectively, while shrubs in the western section adopted a “rapid resource acquisition” strategy under resource-rich conditions, and herbaceous plants adopted a “slow-return” strategy under unfavorable soil conditions. The survival strategies of plants are influenced by multiple ecological factors, and they adapt to arid environments through trait optimization and resource allocation.

Key words： desert plants; functional traits; leaf economics spectrum; Hexi Corridor

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