Chen Lei, Hänninen Heikki, Rossi Sergio, Smith Nicholas G., Pau Stephanie, Liu Zhiyong, Feng Guanqiao, Gao Jie et Liu Jianquan. (2020). Leaf senescence exhibits stronger climatic responses during warm than during cold autumns. Nature Climate Change,
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URL officielle: http://dx.doi.org/doi:10.1038/s41558-020-0820-2
Résumé
A warmer world could extend the growing seasons for plants. Changes in spring phenology have been studied, yet autumn phenology remains poorly understood. Using >500,000 phenological records of four temperate tree species between 1951 and 2013 in Europe, we show that leaf senescence in warm autumns exhibits stronger climate responses, with a higher phenological plasticity, than in cold autumns, indicating a nonlinear response to climate. The onset of leaf senescence in warm autumns was delayed due to the stronger climate response, primarily caused by night-time warming. However, daytime warming, especially during warm autumns, imposes a drought stress which advances leaf senescence. This may counteract the extension of growing season under global warming. These findings provide guidance for more reliable predictions of plant phenology and biosphere–atmosphere feedbacks in the context of global warming.
Type de document: | Article publié dans une revue avec comité d'évaluation |
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Version évaluée par les pairs: | Oui |
Date: | Juillet 2020 |
Sujets: | Sciences naturelles et génie > Sciences appliquées > Climatologie et météorologie Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes |
Département, module, service et unité de recherche: | Départements et modules > Département des sciences fondamentales |
Mots-clés: | Plant phenology, climate change, leaf senescence, global warming |
Déposé le: | 13 juill. 2020 20:15 |
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Dernière modification: | 06 janv. 2021 05:10 |
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