The global spectrum of plant form and function

Area of Science:

• Ecology
• Evolutionary Biology
• Plant Science

Background:

• Vascular plants exhibit diverse forms and life histories, but only a limited number of trait combinations are evolutionarily successful.
• Understanding these trait combinations is key to comprehending terrestrial ecosystem function and evolution.

Purpose of the Study:

• To analyze worldwide variation in six key vascular plant traits.
• To identify coordination and trade-offs among these traits.
• To characterize the global spectrum of plant form and function.

Main Methods:

• Compiled the largest-ever sample of vascular plant species.
• Analyzed variation in six major traits (growth, survival, reproduction).
• Utilized multivariate analysis to explore trait space occupancy.

Main Results:

• Plant trait distribution is concentrated in six-dimensional trait space, indicating strong coordination and trade-offs.
• Three-quarters of trait variation is explained by a two-dimensional global spectrum.
• This spectrum is defined by plant size and the leaf economics spectrum (balancing construction costs and growth).

Conclusions:

• The global plant trait spectrum highlights evolutionary constraints on plant form and function.
• It provides a framework for functionally classifying species and ecosystems.
• This spectrum is crucial for improving predictive models of future vegetation dynamics.