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Photoperiod decelerates the advance of spring phenology of six deciduous tree species under climate warming.
Meng, Lin; Zhou, Yuyu; Gu, Lianhong; Richardson, Andrew D; Peñuelas, Josep; Fu, Yongshuo; Wang, Yeqiao; Asrar, Ghasserm R; De Boeck, Hans J; Mao, Jiafu; Zhang, Yongguang; Wang, Zhuosen.
Afiliação
  • Meng L; Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA, USA.
  • Zhou Y; Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA, USA.
  • Gu L; Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Richardson AD; School of Informatics, Computing and Cyber Systems, Northern Arizona University, Flagstaff, AZ, USA.
  • Peñuelas J; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA.
  • Fu Y; CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Spain.
  • Wang Y; CREAF, Cerdanyola del Vallès, Spain.
  • Asrar GR; Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, China.
  • De Boeck HJ; Department of Natural Resources Science, University of Rhode Island, Kingston, RI, USA.
  • Mao J; Universities Space Research Association, Columbia, MD, USA.
  • Zhang Y; PLECO (Plants and Ecosystems, Department of Biology, University of Antwerp, Wilrijk, Belgium.
  • Wang Z; Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
Glob Chang Biol ; 27(12): 2914-2927, 2021 Jun.
Article em En | MEDLINE | ID: mdl-33651464
ABSTRACT
Vegetation phenology in spring has substantially advanced under climate warming, consequently shifting the seasonality of ecosystem process and altering biosphere-atmosphere feedbacks. However, whether and to what extent photoperiod (i.e., daylength) affects the phenological advancement is unclear, leading to large uncertainties in projecting future phenological changes. Here we examined the photoperiod effect on spring phenology at a regional scale using in situ observation of six deciduous tree species from the Pan European Phenological Network during 1980-2016. We disentangled the photoperiod effect from the temperature effect (i.e., forcing and chilling) by utilizing the unique topography of the northern Alps of Europe (i.e., varying daylength but uniform temperature distribution across latitudes) and examining phenological changes across latitudes. We found prominent photoperiod-induced shifts in spring leaf-out across latitudes (up to 1.7 days per latitudinal degree). Photoperiod regulates spring phenology by delaying early leaf-out and advancing late leaf-out caused by temperature variations. Based on these findings, we proposed two phenological models that consider the photoperiod effect through different mechanisms and compared them with a chilling model. We found that photoperiod regulation would slow down the advance in spring leaf-out under projected climate warming and thus mitigate the increasing frost risk in spring that deciduous forests will face in the future. Our findings identify photoperiod as a critical but understudied factor influencing spring phenology, suggesting that the responses of terrestrial ecosystem processes to climate warming are likely to be overestimated without adequately considering the photoperiod effect.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Árvores / Fotoperíodo Tipo de estudo: Prognostic_studies País/Região como assunto: Europa Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Árvores / Fotoperíodo Tipo de estudo: Prognostic_studies País/Região como assunto: Europa Idioma: En Ano de publicação: 2021 Tipo de documento: Article