ChenHaenninenRossiEtAl2020

Référence

Chen, L., Hänninen, H., Rossi, S., Smith, N.G and  Pau, S.  Liu, Z. , Feng, G. , Gao, J. and  Liu, J.  (2020) Leaf senescence exhibits stronger climatic responses during warm than during cold autumns. Nature Climate Change.

Résumé

A warmer world could extend the growing seasons for plants. Changes in spring phenology have been studied, yet autumnphenology remains poorly understood. Using >500,000 phenological records of four temperate tree species between 1951 and2013 in Europe, we show that leaf senescence in warm autumns exhibits stronger climate responses, with a higher phenologicalplasticity, than in cold autumns, indicating a nonlinear response to climate. The onset of leaf senescence in warm autumns wasdelayed due to the stronger climate response, primarily caused by night-time warming. However, daytime warming, especiallyduring warm autumns, imposes a drought stress which advances leaf senescence. This may counteract the extension of growingseason under global warming. These findings provide guidance for more reliable predictions of plant phenology and biosphere–atmosphere feedbacks in the context of global warming.

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@ARTICLE { ChenHaenninenRossiEtAl2020,
    AUTHOR = { Chen, L. and Hänninen, H. and Rossi, S. and Smith, N.G and  Pau, S.  Liu, Z.  and Feng, G.  and Gao, J. and  Liu, J.  },
    TITLE = { Leaf senescence exhibits stronger climatic responses during warm than during cold autumns },
    JOURNAL = { Nature Climate Change },
    YEAR = { 2020 },
    MONTH = { jul },
    ABSTRACT = { A warmer world could extend the growing seasons for plants. Changes in spring phenology have been studied, yet autumnphenology remains poorly understood. Using >500,000 phenological records of four temperate tree species between 1951 and2013 in Europe, we show that leaf senescence in warm autumns exhibits stronger climate responses, with a higher phenologicalplasticity, than in cold autumns, indicating a nonlinear response to climate. The onset of leaf senescence in warm autumns wasdelayed due to the stronger climate response, primarily caused by night-time warming. However, daytime warming, especiallyduring warm autumns, imposes a drought stress which advances leaf senescence. This may counteract the extension of growingseason under global warming. These findings provide guidance for more reliable predictions of plant phenology and biosphere–atmosphere feedbacks in the context of global warming. },
    DOI = { https://doi.org/10.1038/s41558-020-0820-2 },
}

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