86305 20200716101521.0 doi 10.1111/gcb.14539 sideral 110460 ART-2019-110460 eng Delpierre, N. Chilling and forcing temperatures interact to predict the onset of wood formation in Northern Hemisphere conifers 2019 Access copy available to the general public Unrestricted The phenology of wood formation is a critical process to consider for predicting how trees from the temperate and boreal zones may react to climate change. Compared to leaf phenology, however, the determinism of wood phenology is still poorly known. Here, we compared for the first time three alternative ecophysiological model classes (threshold models, heat-sum models and chilling-influenced heat-sum models) and an empirical model in their ability to predict the starting date of xylem cell enlargement in spring, for four major Northern Hemisphere conifers (Larix decidua, Pinus sylvestris, Picea abies and Picea mariana). We fitted models with Bayesian inference to wood phenological data collected for 220 site-years over Europe and Canada. The chilling-influenced heat-sum model received most support for all the four studied species, predicting validation data with a 7.7-day error, which is within one day of the observed data resolution. We conclude that both chilling and forcing temperatures determine the onset of wood formation in Northern Hemisphere conifers. Importantly, the chilling-influenced heat-sum model showed virtually no spatial bias whichever the species, despite the large environmental gradients considered. This suggests that the spring onset of wood formation is far less affected by local adaptation than by environmentally driven plasticity. In a context of climate change, we therefore expect rising winter–spring temperature to exert ambivalent effects on the spring onset of wood formation, tending to hasten it through the accumulation of forcing temperature, but imposing a higher forcing temperature requirement through the lower accumulation of chilling. info:eu-repo/grantAgreement/EUR/COST/STREeSS-FP1106 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 8.555 2019 ECOLOGY 7 / 168 = 0.042 2019 Q1 T1 BIODIVERSITY CONSERVATION 1 / 59 = 0.017 2019 Q1 T1 ENVIRONMENTAL SCIENCES 9 / 265 = 0.034 2019 Q1 T1 4.198 2019 Ecology 2019 Q1 Global and Planetary Change 2019 Q1 Environmental Science (miscellaneous) 2019 Q1 Environmental Chemistry 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Lireux, S. Hartig, F. Camarero, J.J. Cheaib, A. Cufar, K. Cuny, H. Deslauriers, A. Fonti, P. Gricar, J. Huang, J.G. Krause, C. Liu, G. (orcid)0000-0002-7585-3636 de Luis, M. Universidad de Zaragoza Mäkinen, H. (orcid)0000-0003-1542-2698 del Castillo, E.M. Morin, H. Nöjd, P. Oberhuber, W. Prislan, P. Rossi, S. Saderi, S.M. Treml, V. Vavrick, H. Rathgeber, C.B.K. 3006 430 Universidad de Zaragoza Dpto. Geograf. Ordenac.Territ. Área Geografía Física 25, 3 (2019), 1089-1105 Glob. chang. biol. Global Change Biology 1354-1013 1190443 http://zaguan.unizar.es/record/86305/files/texto_completo.pdf Postprint 285584 http://zaguan.unizar.es/record/86305/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:86305 articulos driver 2020-07-16-09:27:00 ARTICLE