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A simple hypothesis of how leaf and canopy-level transpiration and assimilation respond to elevated CO2 reveals distinct response patterns between disturbed and undisturbed vegetation

Donohue, Randall J.; Roderick, Michael; McVicar, Tim R.; Yang, Yuting


Elevated CO2 increases leaf-level water-use efficiency (ω) almost universally. How canopy-leveltranspiration and assimilationfluxes respond to increasedωis currently unclear. We present a simple,resource-availability-based hypothesis of how equilibrium (or mature) leaf and canopy transpiration andassimilation rates, along with leaf area index (L), respond to elevated CO2. We quantify this hypothesis in theform of a model and test it against observations from eight Free Air CO2 Enrichment sites...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
Source: Journal of Geophysical Research: Biogeosciences
DOI: 10.1002/2016JG003505
Access Rights: Open Access


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