Can decision rules simulate carbon allocation for years with contrasting and extreme weather conditions? A case study for three temperate beech forests

Matteo Campioli, Hans Verbeeck, Joris Van den Bossche, Jian Wu, Andreas Ibrom, D’Andrea, Ettore, Giorgio Matteucci, Roeland Samson, Kathy Steppe and André Granier

Ecological Modelling, 2013, vol. 263, issue C, 42-55

Abstract: The allocation of carbohydrates to different tree processes and organs is crucial to understand the overall carbon (C) cycling rate in forest ecosystems. Decision rules (DR) (e.g. functional balances and source-sink relationships) are widely used to model C allocation in forests. However, standard DR allocation schemes lack a strong environmental sensitivity and their ability to simulate the year-to-year variability and the impact of extreme events is questioned. In this study, we aimed to compare the performance of a standard DR allocation scheme to the performance of an improved DR allocation scheme taking into account drought-induced changes in allocation dynamics and acclimation of respiration. Model validation was performed against extensive datasets of C fluxes and C pools for a 9 years period (2000–2008) for the site of parameterisation (the beech forest of Hesse, France) and for two contrasting sites not used for parameterisation (the beech forest of Sorø, Denmark, for 1999–2006, and Collelongo, Italy, for 2005–2006). At Hesse, 2003 was characterised by a severe and extreme drought and heat wave.

Keywords: Fagus sylvatica L.; Carbon allocation; Modelling; Tree growth; Drought; Heat wave (search for similar items in EconPapers)
Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:263:y:2013:i:c:p:42-55

DOI: 10.1016/j.ecolmodel.2013.04.012

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