Spatial Pattern of Foliar δ○13C in C3-dominated Grasslands and Its Responses to Climatic Factors in Inner Mongolia of China

doi:10.12068/j.issn.1005-3026.2016.02.026

Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (2): 273-279.DOI: 10.12068/j.issn.1005-3026.2016.02.026

• Resources & Civil Engineering • Previous Articles Next Articles

Spatial Pattern of Foliar δ^○13C in C₃-dominated Grasslands and Its Responses to Climatic Factors in Inner Mongolia of China

ZHOU Yong-chun¹， CHENG Xi-lei²， FAN Jiang-wen³， XU Xin-yang¹

1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. Liaoning Academy of Environmental Sciences， Shenyang 110031， China; 3. Key Laboratory of Land Surface Pattern and Simulation， Institute of Geographic Sciences and Natural Resources Research， Chinese Academy of Sciences， Beijing 100101， China.

Received:2014-12-01 Revised:2014-12-01 Online:2016-02-15 Published:2016-02-18
Contact: FAN Jiang-wen
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Abstract

Abstract: In order to explore the pattern and climatic control of foliar δ¹³C， 126 samples of C₃-plant species were collected from 47 areas in the Inner Mongolia during its August prosperous season. The geographic parameters of each site were recorded by GPS， and climatic information of each site was extracted from Meteorological Database of the Chinese Ecological Research Network. Foliar ¹³C/¹²C ratios were determined by an isotope mass spectrometer. The results show that the increasing trend of C₃-plant foliar δ¹³C excursion changes positively with the increase of altitude， but negatively with the increase of longitude and latitude degrees. Climatic factors controlling the C₃-plant foliar δ¹³C variations are mainly involved in the amount of seasonal rainfall and atmospheric pressure， as well in negative relationships， which control spatial distribution of the C₃-plant foliar δ¹³C. In addition， variations of foliar δ¹³C show nothing in trend of the temperature changes here.

Key words: foliar δ¹³C, grassland, C₃-plant, spatial pattern, climatic factor, Inner Mongolia

CLC Number:

ZHOU Yong-chun， CHENG Xi-lei， FAN Jiang-wen， XU Xin-yang. Spatial Pattern of Foliar δ^○13C in C₃-dominated Grasslands and Its Responses to Climatic Factors in Inner Mongolia of China[J]. Journal of Northeastern University Natural Science, 2016, 37(2): 273-279.

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Spatial Pattern of Foliar δ^○13C in C₃-dominated Grasslands and Its Responses to Climatic Factors in Inner Mongolia of China

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