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Functional convergence in plant responses to the environment
1USDA Forest Service, Forestry Sciences Laboratory, 3200 SW Jefferson Way, Corvallis, OR 97331, USA. fmeinzer@fs.fed.us
Oecologia
|March 21, 2003
Summary
Plant ecophysiology reveals surprising functional convergence across diverse species. Universal constraints related to plant size and traits limit physiological solutions for adaptation.
Area of Science:
- Comparative ecophysiology
- Plant functional traits
- Scaling theory
Background:
- Traditional research emphasizes species-specific divergence in plant physiological processes.
- Focus on differences in transpiration, photosynthesis, and growth limits understanding of universal adaptation mechanisms.
Purpose of the Study:
- To highlight functional convergence in plant ecophysiology across diverse species.
- To emphasize the role of scaling factors, constraints, and trade-offs in plant adaptation.
- To advocate for integrating plant size, architecture, and chemistry into ecophysiological studies.
Main Methods:
- Review of selected empirical and theoretical scaling models.
- Analysis of functional traits related to water and carbon economy.
- Identification of universal constraints and trade-offs in plant functioning.
Main Results:
- Substantial functional convergence observed in taxonomically and architecturally diverse species.
- Plant size, architecture, allometry, and chemistry significantly constrain functional traits.
- Limited number of physiological solutions exist for plant adaptation to environmental challenges.
Conclusions:
- Plant adaptation is shaped by a finite set of physiological solutions.
- Comparative ecophysiology benefits from considering anatomical, structural, and chemical constraints.
- Understanding convergence provides deeper insights into universal plant adaptation strategies.