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The interdependence of mechanisms underlying climate-driven vegetation mortality
Nate G McDowell1, David J Beerling, David D Breshears
1Los Alamos National Laboratory, Los Alamos, NM 87545, USA. mcdowell@lanl.gov
Trends in Ecology & Evolution
|August 2, 2011
Summary
Climate change is causing widespread vegetation mortality, impacting global ecosystems. Understanding the complex interplay of plant functions and their interactions with pests is crucial for accurate future climate predictions.
Area of Science:
- Ecology
- Plant Physiology
- Climate Science
Background:
- Climate-driven vegetation mortality is a growing global concern.
- Current models lack mechanistic understanding of mortality processes.
- Improved predictions require better algorithms for future climate feedbacks.
Purpose of the Study:
- To synthesize evidence on vegetation mortality mechanisms.
- To investigate interdependencies between plant functions and biotic factors.
- To identify research needs for improved climate-vegetation models.
Main Methods:
- Literature synthesis integrating diverse scientific fields.
- Analysis of potential failure points in plant physiological processes.
- Examination of interactions between plant health and pathogen/insect populations.
Main Results:
- Hydraulic function, carbohydrate metabolism, and defense metabolism have multiple failure points.
- These plant processes are interdependent with each other and with pests.
- Climate warming and drying are predicted to amplify these failure mechanisms.
Conclusions:
- Vegetation mortality is a complex, emergent phenomenon driven by climate change.
- Interdependencies between plant physiology and biotic factors are critical.
- Further research is needed to test these interdependencies and refine climate models.
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