Relationship between wind speed and plant hydraulics at the global scale
Pengcheng He1, Qing Ye2,3, Kailiang Yu4,5
1Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.
Wind impacts plant hydraulics globally. Plants in windier areas develop smaller xylem conduits and less leaf area, increasing drought resilience. These traits may offer advantages in future, windier climates.
Area of Science:
- Plant Ecology
- Plant Physiology
- Global Change Biology
Background:
- Wind is a significant environmental factor influencing plant water relations and survival.
- Previous research has not fully elucidated the global-scale effects of wind on crucial plant hydraulic traits.
Purpose of the Study:
- To investigate the global correlations between wind speed and key plant hydraulic traits.
- To understand how wind influences plant adaptations to water stress and dehydration.
Main Methods:
- Compiled data on plant hydraulic traits (P50, KS, AL/AS, D) for 1,922 woody species across 469 global sites.
- Analyzed trait correlations with wind speed, controlling for other climatic variables like temperature and moisture index.
Main Results:
- Wind speed significantly affected plant hydraulics, even when other climatic factors were controlled.
- Species from windier sites exhibited smaller conduit diameters (D) and lower xylem-specific hydraulic conductivity (KS).
- These species also showed greater drought resilience (more negative P50) and reduced leaf area relative to sapwood area (AL/AS).
Conclusions:
- Plants adapt their hydraulic structures in response to prevailing wind conditions.
- The observed adaptations, including smaller xylem conduits and reduced leaf area, enhance drought resilience.
- These traits may confer a survival advantage for plants in future climates characterized by increased wind speeds.
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