Spatial variance of spring phenology in temperate deciduous forests is constrained by biogeographical conditions of temperature, light and aridity
Peaucelle, Marc (Universiteit Gent. CAVElab)
Janssens, Ivan (Universiteit Antwerpen. Departement Biologie)
Stocker, Benjamin. (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Descals, Adrià (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Fu, Yongshuo H.. (Beijing Normal University. College of Water Sciences)
Molowny-Horas, Roberto (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Ciais, Philippe (Laboratoire des Sciences du Climat et de l'Environnement)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Date:	2019
Abstract:	Leaf unfolding in temperate forests is driven by spring temperature, but little is known about the spatial variance of that temperature dependency. Here we use in situ leaf unfolding observations for eight deciduous tree species to show that the two factors that control chilling (number of cold days) and heat requirement (growing degree days at leaf unfolding, GDDreq) only explain 30% of the spatial variance of leaf unfolding. Radiation and aridity differences among sites together explain 10% of the spatial variance of leaf unfolding date, and 40% of the variation in GDDreq. Radiation intensity is positively correlated with GDDreq and aridity is negatively correlated with GDDreq spatial variance. These results suggest that leaf unfolding of temperate deciduous trees is adapted to local mean climate, including water and light availability, through altered sensitivity to spring temperature. Such adaptation of heat requirement to background climate would imply that models using constant temperature response are inherently inaccurate at local scale.
Grants:	European Commission 610028
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Ecological modelling ; Ecophysiology ; Forest ecology ; Macroecology
Published in:	Nature communications, Vol. 10 (Nov. 2019) , art. 5388, ISSN 2041-1723

DOI: 10.1038/s41467-019-13365-1
PMID: 31772185

10 p, 1.2 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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