Global patterns and drivers of leaf photosynthetic capacity : the relative importance of environmental factors and evolutionary history
Yan, Zhengbing (The University of Hong Kong. School of Biological Sciences)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Detto, Matteo (Princeton University. Department of Ecology and Evolutionary Biology)
Smith, Nicholas G. (Texas Tech University. Department of Biological Sciences)
Wang, Han (Tsinghua University. Department of Earth System Science)
Guo, Lulu (University of Chinese Academy of Sciences. College of Life Sciences)
Hughes, Alice C. (The University of Hong Kong.School of Biological Sciences)
Guo, Zhengfei (The University of Hong Kong. School of Biological Sciences)
Lee, Calvin K. F. (The University of Hong Kong. School of Biological Sciences)
Liu, Lingli (Chinese Academy of Science. Institute of Botany. State Key Laboratory of Vegetation and Environmental Change)
Wu, Jin (The University of Hong Kong. School of Biological Sciences)

Data:	2023
Resum:	Aim: understanding the considerable variability and drivers of global leaf photosynthetic capacity [indicated by the maximum carboxylation rate standardized to 25°C (Vc,max25)] is an essential step for accurate modelling of terrestrial plant photosynthesis and carbon uptake under climate change. Although current environmental conditions have often been connected with empirical and theoretical models to explain global Vc,max25 variability through acclimatization and adaptation, long-term evolutionary history has largely been neglected, but might also explicitly play a role in shaping the Vc,max25 variability. - Location: global - Time period: contemporary - Major taxa studied: terrestrial plants. - Methods: we compiled a geographically comprehensive global dataset of Vc,max25 for C3 plants (n = 6917 observations from 2157 species and 425 sites covering all major biomes world-wide), explored the biogeographical and phylogenetic patterns of Vc,max25, and quantified the relative importance of current environmental factors and evolutionary history in driving global Vc,max25 variability. - Results: we found that Vc,max25 differed across different biomes, with higher mean values in relatively drier regions, and across different life-forms, with higher mean values in non-woody relative to woody plants and in legumes relative to non-leguminous plants. The values of Vc,max25 displayed a significant phylogenetic signal and diverged in a contrasting manner across phylogenetic groups, with a significant trend along the evolutionary axis towards a higher Vc,max25 in more modern clades. A Bayesian phylogenetic linear mixed model revealed that evolutionary history (indicated by phylogeny and species) explained nearly 3-fold more of the variation in global Vc,max25 than present-day environment (53 vs. 18%). - Main conclusions: these findings contribute to a comprehensive assessment of the patterns and drivers of global Vc,max25 variability, highlighting the importance of evolutionary history in driving global Vc,max25 variability, hence terrestrial plant photosynthesis.
Ajuts:	Agencia Estatal de Investigación PID2020-115770RB-I00 Agencia Estatal de Investigación PID2019-110521GB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1005
Nota:	Altres ajuts: Fundación Ramon Areces grant CIVP20A6621
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Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Biogeography ; Biome ; Environmental factor ; Evolutionary history ; Global carbon cycling ; Life-form ; Photosynthetic capacity ; Phylogeny ; Species
Publicat a:	Global Ecology and Biogeography, Vol. 32, issue 5 (May 2023) , p. 619-823, ISSN 1466-8238

DOI: 10.1111/geb.13660

Postprint 39 p, 1.8 MB

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