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Updated: Mar 20, 2026

Relating Stomatal Conductance to Leaf Functional Traits
Published on: October 12, 2015
Dynamic spatial patterns of leaf traits affect total respiration on the crown scale
Xiaolin Wang1, Hongxuan Zhou1, Fengsen Han1
1Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, State Key Laboratory of Urban and Regional Ecology (SKLURE), Beijing 100085, PR China.
Crown ecological zones (CEZs) offer a new method to study leaf trait variations and estimate forest carbon budgets. This approach reduces errors in total crown respiration estimation by accounting for spatial heterogeneity.
Area of Science:
- Ecology
- Forestry
- Plant Physiology
Background:
- Leaf traits exhibit significant temporal and spatial variations, leading to errors in estimating crown-scale carbon budgets.
- Current methods lack quantitative approaches to describe and analyze the heterogeneous patterns within forest crowns.
Purpose of the Study:
- To develop a method for quantitatively describing spatial crown heterogeneity.
- To analyze the influencing factors on leaf dark respiration (Rd) variations.
- To estimate total crown respiration (Rt) using a novel zoning approach.
Main Methods:
- Investigated dynamic spatial patterns of ecological factors under different sky conditions.
- Developed the crown ecological zones (CEZs) method for spatial crown zoning.
- Analyzed hourly and spatial variations of leaf dark respiration (Rd) and estimated total crown respiration (Rt).
Main Results:
- Dynamic spatial patterns of air temperature and light intensity varied significantly across CEZs.
- The contributions of influencing factors on Rd variations differed with crown depth and sky conditions.
- Leaf structural and chemical traits had a greater influence on Rd during sunny days compared to ecological factors.
Conclusions:
- The CEZs method provides a quantitative framework for understanding crown heterogeneity and its impact on physiological processes.
- CEZs can significantly reduce estimation errors for total crown respiration (Rt).
- This study offers references for scaling ecological processes from leaf to crown and supports the expansion of lab-based experiments to field studies.
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