首页|Seasonal Variation of δ13C of Four Tree Species: A Biological Integrator of Environmental Variables
Seasonal Variation of δ13C of Four Tree Species: A Biological Integrator of Environmental Variables
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Foliar δ13C values, an indicator of long-term intercellular carbon dioxide concentration and, thus,of long-term water use efficiency (WUE) in plants, were measured for Pinus massoniana Lamb., P. elliottii Engelm., Cunninghamia laceolata (Lamb.) Hook., and Schima superba Gardn. et Champ. in a restored forest ecosystem in the Jiazhu River Basin. Seasonal variation and the relationship between the foliar δ13Cvalues of the four species and environmental factors (monthly total precipitation, monthly average air temperature, relative humidity, atmospheric pressure, and monthly total solar radiation and evaporation)were investigated. The monthly δ13C values and WUE of the four species increased with increasing precipitation, air temperature, solar radiation, and evaporation, whereas δ13C values of the four species decreased with increasing relative humidity and atmospheric pressure. Despite significant differences in δ13C seasonal means for the four species, our results demonstrate a significant convergence in the responses of δ13C values and WUE to seasonal variations in environmental factors among the species investigated and that the δ13C signature for each species gives a strong indication of environmental variables.
δ13CCunninghamia laceolataPinus elliottiiPinus massonianaSchima superbawater use efficiency (WUE)
Hai-Tao LI、Jun XIA、Le XIANG、Tao LIANG、Qi-Jing LIU
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Institute of Geographic Sciences and Natural Resources Research, the Chinese Academy of Sciences, Beijing 100101, China
Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, the Chinese Academy of Sciences, Beijing 100101, China
Frontier ProjectBackbone Project中国科学院知识创新工程项目Chinese Academy of SciencesNatural Resources Research
NETL
NSTL
万方数据
维普
