ACHAT, David; AUGUSTO, Laurent; GALLET-BUDYNEK, Anne; LOUSTAU, Denis

doi:10.1007/s10533-016-0274-9

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ACHAT, David
Interactions Sol Plante Atmosphère [UMR ISPA]

AUGUSTO, Laurent
Interactions Sol Plante Atmosphère [UMR ISPA]

GALLET-BUDYNEK, Anne
Interactions Sol Plante Atmosphère [UMR ISPA]

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Biogeochemistry. 2016, vol. 131, n° 1-2, p. 173-202

Springer Verlag

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Climate change has consequences for terrestrial functioning, but predictions of plant responses remain uncertain because of the gaps in the representation of nutrient cycles and C–N–P interactions in ecosystem models. Here, we review the processes that are included in ecosystem models, but focus on coupled C–N–P cycle models. We highlight important plant adjustments to climate change, elevated atmospheric CO2, and/or nutrient limitations that are currently not—or only partially—incorporated in ecosystem models by reviewing experimental studies and compiling data. Plant adjustments concern C:N:P stoichiometry, photosynthetic capacity, nutrient resorption rates, allocation patterns, symbiotic N2 fixation and root exudation (phosphatases, carboxylates) and the effect of root exudation on nutrient mobilization in the soil rhizosphere (P solubilization, biochemical mineralization of organic P and priming effect). We showed that several plant adjustments could be formulated and calibrated using existing experimental data in the literature. Finally, we proposed a roadmap for future research because improving ecosystem models necessitate specific data and collaborations between modelers and empiricists.< Réduire

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nitrogen cycle

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carbon cycle

C:N:P stoichiometry

terrestrial ecosystem models

plant adjustments

phosphorus cycle

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Future challenges in coupled C–N–P cycle models for terrestrial ecosystems under global change: a review

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