RT info:eu-repo/semantics/article
T1 Phenotypic Plasticity Explains Response Patterns of European Beech (Fagus sylvatica L.) Saplings to Nitrogen Fertilization and Drought Events
A1 Dziedek, Christoph
A1 Fichtner, Andreas
A1 Calvo Galván, María Leonor
A1 Marcos Porras, Elena María
A1 Jansen, Kirstin
A1 Kunz, Matthias
A1 Walmsley, David
A1 Oheimb, Goddert von
A1 Härdtle, Werner
A2 Ecologia
K1 Ecología. Medio ambiente
K1 Allometric growth
K1 Apparent plasticity
K1 δ13C
K1 Global change
K1 Plastic allometry
K1 Shoot:root ratio
AB 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)
PB MDPI
YR 2018
FD 2018-11-08
LK http://hdl.handle.net/10612/8955
UL http://hdl.handle.net/10612/8955
NO Forests, 2017, vol. 8, n. 3, 91
NO P. 1-11
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 16-abr-2024