@article{Joshi:2021:10.5194/egusphere-egu21-11142,
author = {Joshi, J and Stocker, B and Hofhansl, F and Zhou, S and Brännström, Å and Prentice, IC and Dieckmann, U},
doi = {10.5194/egusphere-egu21-11142},
title = {Eco-evolutionary responses of plant communities to drought and rainfall variability},
url = {http://dx.doi.org/10.5194/egusphere-egu21-11142},
year = {2021}
}

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TY  - JOUR
AB  - <jats:p>&lt;p&gt;The future Earth is projected to experience elevated rainfall variability, with more frequent and intense droughts, as well as high-rainfall events. Increasing CO&lt;sub&gt;2&lt;/sub&gt; concentrations are expected to raise terrestrial gross primary productivity (GPP), whereas water stress is expected to lower GPP. Plant responses to water stress vary strongly with timescale, and plants adapted to different environmental conditions differ in their functional responses. Here, we embed a unified optimality-based theory of stomatal conductance and biochemical acclimation of leaves we have recently developed [Joshi, J. et al. (2020) Towards a unified theory of plant photosynthesis and hydraulics. bioRxiv 2020.12.17.423132] in an eco-evolutionary vegetation-modelling framework, with the goal to investigate emergent functional diversity and associated GPP impacts under different rainfall regimes.&lt;/p&gt;&lt;p&gt;The model of photosynthesis used here simultaneously predicts the stomatal responses and biochemical acclimation of leaves to atmospheric and soil-moisture conditions. Using three hydraulic traits and two cost parameters, it successfully predicts the simultaneous declines in CO&lt;sub&gt;2&lt;/sub&gt; assimilation rate, stomatal conductance, and leaf photosynthetic capacity caused by drying soil. It also correctly predicts the responses of CO&lt;sub&gt;2&lt;/sub&gt; assimilation rate, stomatal conductance, leaf water potential, and leaf photosynthetic capacity to vapour pressure deficit, temperature, ambient CO&lt;sub&gt;2&lt;/sub&gt;, light intensity, and elevation. Our model therefore captures the synergistic effects of atmospheric and soil drought, as well as of atmospheric CO&lt;sub&gt;2&lt;/sub&gt; changes, on plant photosynthesis
AU  - Joshi,J
AU  - Stocker,B
AU  - Hofhansl,F
AU  - Zhou,S
AU  - Brännström,Å
AU  - Prentice,IC
AU  - Dieckmann,U
DO  - 10.5194/egusphere-egu21-11142
PY  - 2021///
TI  - Eco-evolutionary responses of plant communities to drought and rainfall variability
UR  - http://dx.doi.org/10.5194/egusphere-egu21-11142
ER  - 

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