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Related Experiment Video

Updated: Nov 4, 2025

Relating Stomatal Conductance to Leaf Functional Traits

Relating Stomatal Conductance to Leaf Functional Traits

Published on: October 12, 2015

Individual-level leaf trait variation and correlation across biological and spatial scales.

Feng Jiang^1,2, Marc W Cadotte^2,3, Guangze Jin^1,4

¹Center for Ecological Research Northeast Forestry University Harbin China.

Ecology and Evolution

|May 24, 2021

Summary

Intraspecific trait variation (ITV) explains significant leaf trait variation in seedlings, impacting tree recruitment. Sample size, not scale, influences trait correlations, crucial for ecological studies.

Keywords:

intraspecific trait variation leaf economics traits leaf size traits sample size trait correlation trait trade‐off

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Area of Science:

Ecology
Plant Ecology
Forest Ecology

Background:

Intraspecific trait variation (ITV) is increasingly recognized for its ecological importance.
Quantifying ITV in seedlings is vital for understanding tree recruitment and forest dynamics.
Few studies have assessed ITV constraints like trait trade-offs and correlations in seedlings.

Purpose of the Study:

To quantify the amount of ITV in seedling leaf traits.
To assess trait correlations across biological and spatial scales.
To explore the influence of trait variance and sample size on trait correlations.

Main Methods:

Measured ten leaf traits (size, economics, lamina, petiole) in over 2,800 seedlings across 283 plots.
Quantified ITV and trait correlations at intraspecific, interspecific, within-plot, and among-plot scales.
Analyzed the effects of trait variance and sample size on the strength of trait correlations.

Main Results:

Intraspecific trait variation (ITV) explained approximately 40% of leaf-level trait variation.
Lamina and petiole traits showed consistent correlations across scales.
Leaf size traits weakly correlated with economics traits; lamina mass ratio strongly correlated with petiole length.
Trait correlations varied by species, plot, and scale, but were not scale-dependent.
Larger trait variance strengthened correlations, while sample size negatively impacted correlation strength.

Conclusions:

A substantial portion of leaf trait variation in seedlings is attributed to ITV.
ITV is a critical factor to consider in seedling ecology and trait-based approaches.
Sample size significantly influences trait correlation strength, necessitating consideration when comparing studies.