Leaf traits suggest different ecological strategies for two Quercus species along an altitudinal gradient in the Qinling Mountains

Published Date

First online: 21 July 2015

Title 

Leaf traits suggest different ecological strategies for two Quercus species along an altitudinal gradient in the Qinling Mountains

• Author 

• Yongfu Chai 
• , Xiaofei Zhang 
• , Ming Yue 
• , Xiao Liu
• , Qian Li
• , Hailin Shang
• , Qiancai Meng
• , Ruichang Zhang

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• Abstract 

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• Local-scale study on leaf traits and their relationships in a single species along an environmental gradient is essential for scaling up ecophysiological processes from the leaf to the ecosystem level. Here, we quantified 25 leaf traits of two individual species, Quercus aliena var. acutiserrata(Qa, deciduous) and Quercus spinosa (Qs, evergreen), in the same genus, but with different life-form to investigate the leaf traits and relationship variations within and between species along an altitudinal gradient in the Qinling Mountains. Variations of leaf traits were common along an altitudinal gradient at species level, but with different trends between two species. The relationships between plant functional traits were complex and showed different patterns between two species. Two species show different response patterns and adaptation strategies to environmental gradients. The Qa at high altitude suffers from low temperature stress that breaks its carbon balance and leads to growth restriction, which supports the “source-limitation” hypothesis, while Qs at high altitude possesses an adequate supply of carbon to protect from stress, which supports the “sink- or growth-limitation” hypothesis. The effect of environmental change on leaf traits is greater in leaf form than the genetic relationship.

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• References 

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• http://link.springer.com/article/10.1007/s10310-015-0496-z