李善家 1李来周 2缪潆祥 2苟伟 2苏培玺3
作者信息
- 1. 兰州理工大学生命科学与工程学院，甘肃 兰州 730050;中国科学院寒旱区陆面过程与气候变化重点实验室，甘肃 兰州 730000
- 2. 兰州理工大学生命科学与工程学院，甘肃 兰州 730050
- 3. 中国科学院寒旱区陆面过程与气候变化重点实验室，甘肃 兰州 730000
- 折叠
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。
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 main taining 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 aslow-returnstrategy, shrubs and herbaceous plants in the central section exhibitedslow-returnandfast-returnstrategies respectively, while shrubs in the western section adopted arapid resource acquisitionstrategy under resource-rich conditions, and herbaceous plants adopted aslow-returnstrategy 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.关键词
荒漠植物/功能性状/叶经济谱/河西走廊Key words
desert plants/functional traits/leaf economics spectrum: Hexi Corridor引用本文复制引用
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[EB/OL].(2025-04-08)[2026-04-03].https://chinaxiv.org/abs/202504.00131.学科分类
环境科学技术现状/环境科学基础理论/社会与环境
评论