Intraspecific variability of leaf form and function across habitat types

Area of Science:

• Ecology
• Plant Biology
• Trait-based Ecology

Background:

• Trait-based ecology identifies plant adaptive strategies using trait spaces.
• Intraspecific trait variability (ITV) is often overlooked in these analyses.
• Understanding ITV's role is crucial for accurate ecological interpretations.

Purpose of the Study:

• To investigate the impact of intraspecific trait variability (ITV) on plant trait spaces.
• To analyze how ITV affects the axes and functional structure of trait spaces.
• To determine the context-dependency of ITV's effects across different traits and habitats.

Main Methods:

• Utilized empirical ITV-level data for leaf form and function traits.
• Analyzed data from 167 plant species across five distinct habitat types in the Italian peninsula.
• Applied statistical methods to assess changes in trait space dimensions and variance.

Main Results:

• ITV was found to rotate trait variation axes and increase explained variance within trait spaces.
• ITV significantly affected the functional structure of the plant trait space.
• The magnitude of ITV's effects was generally small and varied depending on the specific trait and habitat.

Conclusions:

• Intraspecific trait variability plays a role in shaping plant trait spaces, but its influence is context-dependent.
• Extrapolating ITV patterns across different traits and spatial scales requires caution.
• The study provides a foundational framework for integrating ITV into future trait space analyses.