Species-specific tree growth and intrinsic water-use efficiency of Dahurian larch (Larbc gmelinii) and Mongolian pine (Pinus sylvestris var. mongolica) growing in a boreal permafrost region of the Greater Hinggan Mountains, Northeastern China

Increasing air temperature and atmospheric CO2 concentrations (C-a) can profoundly affect photosynthesis and intrinsic water-use efficiency (iWUE). However, the response of trees in boreal permafrost regions to rapid warming and C-a increases is poorly constrained by prior research. Here, we evaluat...

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Bibliographic Details
Published in:Agricultural and Forest Meteorology
Main Authors: Zhang, Xuanwen, Liu, Xiaohong, Zhang, Qiuliang, Zeng, Xiaomin, Xu, Guobao, Wu, Guoju, Wang, Wenzhi
Format: Article in Journal/Newspaper
Language:English
Published: ELSEVIER SCIENCE BV 2018
Subjects:
Tree Growth
Intrinsic Water-use Efficiency
Mongolian Pine
Dahurian Larch
Tree Rings
Northeastern China
Science & Technology
Life Sciences & Biomedicine
Physical Sciences
Agriculture
Forestry
Meteorology & Atmospheric Sciences
CARBON-ISOTOPE DISCRIMINATION
NORTHERN INNER-MONGOLIA
CLIMATE-CHANGE
PRECIPITATION RECONSTRUCTION
TIBETAN PLATEAU
STABLE-ISOTOPES
ATMOSPHERIC CO2
RADIAL GROWTH
FORESTS
RINGS
Agronomy
permafrost
Online Access:http://ir.imde.ac.cn/handle/131551/20715
https://doi.org/10.1016/j.agrformet.2017.09.013
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Summary:Increasing air temperature and atmospheric CO2 concentrations (C-a) can profoundly affect photosynthesis and intrinsic water-use efficiency (iWUE). However, the response of trees in boreal permafrost regions to rapid warming and C-a increases is poorly constrained by prior research. Here, we evaluated long-term changes in growth (using regional curve standardization [RCS]) and IWUE of Dahurian larch (Larix gmelinii) and Mongolian pine (Pinus sylvestris var. mongolica) in the boreal permafrost region of northeastern China and species-specific responses to increasing C-a and temperature. From 1930-2010, RCS growth of Dahurian larch and Mongolian pine decreased, while iWUE increased by 25.5 and 21.1%, respectively. RCS growth of both species was negatively correlated with winter temperatures, but Mongolian pine depended most strongly on previous December to current February temperatures and Dahurian larch depended most strongly on March temperatures. Moisture conditions only weakly influenced growth.

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