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    Título
    Phenotypic Plasticity Explains Response Patterns of European Beech (Fagus sylvatica L.) Saplings to Nitrogen Fertilization and Drought Events
    Autor
    Dziedek, Christoph
    Fichtner, Andreas
    Calvo Galván, María LeonorAutoridad BuleriaORCID
    Marcos Porras, Elena MaríaAutoridad BuleriaORCID
    Jansen, Kirstin
    Kunz, Matthias
    Walmsley, David
    Oheimb, Goddert von
    Härdtle, Werner
    Facultad/Centro
    Facultad de Ciencias Biologicas y Ambientales
    Área de conocimiento
    Ecologia
    Datos de la obra
    Forests, 2017, vol. 8, n. 3, 91
    Editor
    MDPI
    Fecha
    2017-03-20
    Abstract
    Climate and atmospheric changes affect forest ecosystems worldwide, but little is known about the interactive effects of global change drivers on tree growth. In the present study, we analyzed single and combined effects of nitrogen (N) fertilization and drought events (D) on the growth of European beech (Fagus sylvatica L.) saplings in a greenhouse experiment. We quantified morphological and physiological responses to treatments for one‐ and two‐year‐old plants. N fertilization increased the saplings’ aboveground biomass investments, making them more susceptible to D treatments. This was reflected by the highest tissue dieback in combined N and D treatments and a significant N × D interaction for leaf δ13C signatures. Thus, atmospheric N deposition can strengthen the drought sensitivity of beech saplings. One‐year‐old plants reacted more sensitively to D treatments than two‐year‐old plants (indicated by D‐induced shifts in leaf δ13C signatures of one‐year‐old and two‐year‐old plants by +0.5‰ and −0.2‰, respectively), attributable to their higher shoot:root‐ratios (1.8 and 1.2, respectively). In summary, the saplings’ treatment responses were determined by their phenotypic plasticity (shifts in shoot:root‐ratios), which in turn was a function of both the saplings’ age (effects of allometric growth trajectories = apparent plasticity) and environmental impacts (effects of N fertilization = plastic allometry)
    Materia
    Ecología. Medio ambiente
    Palabras clave
    Allometric growth
    Apparent plasticity
    δ13C
    Global change
    Plastic allometry
    Shoot:root ratio
    Peer review
    SI
    URI
    http://hdl.handle.net/10612/8955
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