In this section
@article{Mengoli:2020:10.5194/egusphere-egu2020-4154,
author = {Mengoli, G and Prentice, IC and Harrison, SP},
doi = {10.5194/egusphere-egu2020-4154},
title = {Adapting an optimality-based model to predict half-hourly carbon uptake by ecosystems},
url = {http://dx.doi.org/10.5194/egusphere-egu2020-4154},
year = {2020}
}
TY - JOUR
AB - <jats:p> <p>Carbon dioxide (CO<sub>2</sub>) uptake by leaves and its conversion into sugar by photosynthesis &#8211; gross primary production (GPP) &#8211; is the basis for vegetation growth. GPP is important for the carbon cycle, and its interactions with climate are a subject of study in Earth System modelling. One assumption of many current ecosystem models is that key photosynthetic traits, such as the capacities for carboxylation (V<sub>cmax</sub>) and electron transport (J<sub>max</sub>&#173;) for ribulose-1,5-bisphosphate (RuBP) regeneration, are constant in time for any given plant functional type. Optimality theory predicts they should vary systematically with growth conditions, both in space and in time, and are not necessarily depend on the plant functional type. Moreover, theory makes specific, quantitative predictions about their (acclimated) community-mean values, predictions well supported by evidence. Neglecting such acclimation could lead to incorrect model estimates of the responses of primary production to climate change.</p><p>We focus on a proof-of-concept based on a primary production model, the P-model &#8211; which combines the Farquhar-von Caemmerer-Berry model for C<sub>3</sub> photosynthesis with eco-evolutionary optimality principles for the co-optimization of carboxylation and water transport costs &#8211; to allow the model to reproduce short-term variations in photosynthesis and transpiration as well as longer-term, acclimated variations. Key to this effort is explicitly separating the instantaneous responses of photosynthetic rates, and the slower acclimation of photosynthetic traits. The model also includes a dynamic optimiz
AU - Mengoli,G
AU - Prentice,IC
AU - Harrison,SP
DO - 10.5194/egusphere-egu2020-4154
PY - 2020///
TI - Adapting an optimality-based model to predict half-hourly carbon uptake by ecosystems
UR - http://dx.doi.org/10.5194/egusphere-egu2020-4154
UR - https://doi.org/10.5194/egusphere-egu2020-4154
ER -
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