Functional trait response to aridity based on leaf trait network analysis in the Hexi Corridor, China.

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ID: 282886
2025
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Abstract
Aridity acts as a strong environmental filter for plants and is predicted to intensify in the future, resulting in changes to leaf functional traits. However, few studies explore how interactions of multiple traits result in leaf trait tradeoff strategies along an aridity gradient, and whether trait separation occurs with increasing aridity intensity. This study examines the impact of long-term aridity on 14 plant leaf traits in two arid areas (arid and hyper-arid) in the Hexi Corridor, China. A leaf trait network (LTN) was constructed to study how leaf trait tradeoff strategies differ between the two areas. Structural equation modeling (SEM) was used to identify the direct and indirect effects of aridity and functional diversity (as measured by community weighted means and functional dispersion) on leaf nutrient concentration. LTN shows trait separation, poor synergy among traits, and low resource utilization. Correlation analyses showed that the mass ratio hypothesis is dominant, and aridity is positively correlated with leaf relative water content (RWC) and leaf phosphorus content, and negatively correlated with leaf nitrogen content (LNC). SEM results indicated that LNC is directly affected by aridity, RWC, leaf carbon content, and plant height. Aridity and functional dispersion directly affects leaf phosphorus content. Results indicate that increasing drought weakens plant coordination among specific traits, and the main change in plant trait tradeoff strategies is reflected in the separation of nutrient traits. Exploring the change of the tradeoff among traits along the aridity gradient can better understand the adaptation process of plants to aridity and the process of community function change.
Reference Key
miao2025functional Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Miao, Yingxiang; Liu, Haifeng; White, James F; Wu, Guoqiang; Li, Shanjia
Journal BMC plant biology
Year 2025
DOI
10.1186/s12870-025-06658-9
URL
Keywords
structural equation model aridity community weighted means hexi corridor leaf trait network trait tradeoff strategy

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