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An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas

Gao Shan, Liang Eryuan, Liu Ruishun, Babst Flurin, Camarero J. Julio, Fu Yongshuo H., Piao Shilong, Rossi Sergio, Shen Miaogen, Wang Tao et Peñuelas Josep. (2022). An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas. Nature Ecology & Evolution, 6, p. 397-404.

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Climatic warming alters the onset, duration and cessation of the vegetative season. While prior studies have shown a tight link between thermal conditions and leaf phenology, less is known about the impacts of phenological changes on tree growth. Here, we assessed the relationships between the start of the thermal growing season (TSOS) and tree growth across the extratropical Northern Hemisphere using 3451 tree-ring chronologies and daily climatic data for 1948-2014. An earlier TSOS promoted growth in regions with high ratios of precipitation to temperature but limited growth in cold dry regions. Path analyses indicated that an earlier TSOS enhanced growth primarily by alleviating thermal limitations on wood formation in boreal forests and by lengthening the period of growth in temperate and Mediterranean forests. Semi-arid and dry subalpine forests, however, did not benefit from an earlier onset of growth and a longer growing season, presumably due to associated water loss and/or more frequent early spring frosts. These emergent patterns of how climatic impacts on wood phenology affect tree growth at regional to hemispheric scales hint at how future phenological changes may affect the carbon sequestration capacity of extratropical forest ecosystems.

Type de document:Article publié dans une revue avec comité d'évaluation
Pages:p. 397-404
Version évaluée par les pairs:Oui
Identifiant unique:10.1038/s41559-022-01668-4
Sujets: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:Climate change, tree growth, growing season, precipitation, northern hemisphere, phenology
Informations complémentaires:This version of the article has been accepted for publication, after peer review and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at:
Déposé le:26 avr. 2022 21:57
Dernière modification:31 août 2022 04:00
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