内蒙古草地植被δ13C空间格局及其对气候因子的响应

doi:10.12068/j.issn.1005-3026.2016.02.026

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (2): 273-279.DOI: 10.12068/j.issn.1005-3026.2016.02.026

内蒙古草地植被δ¹³C空间格局及其对气候因子的响应

周咏春¹，程希雷²，樊江文³，徐新阳¹

(1. 东北大学资源与土木工程学院，辽宁沈阳110819； 2. 辽宁省环境科学研究院，辽宁沈阳110031；3. 中国科学院地理科学与资源研究所陆地表层格局与模拟重点实验室，北京100101)

收稿日期:2014-12-01 修回日期:2014-12-01 出版日期:2016-02-15 发布日期:2016-02-18
通讯作者: 周咏春
作者简介:周咏春(1982-)，女，辽宁盖州人，东北大学讲师，博士；樊江文(1961-)，男，甘肃陇西人，中国科学院地理科学与资源研究所研究员，博士生导师；徐新阳(1967-)，男，浙江金华人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(31400413)；中央高校基本科研业务费专项资金资助项目(N130301001)；辽宁省博士启动基金资助项目(20141017)；国家重点基础研究发展计划项目(2010CB950902)；国家科技支撑计划项目(2013BAC03B04).

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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摘要/Abstract

摘要： 为了探明内蒙古草地植物叶片δ^○13C的空间格局及其对气候因子的响应，于植物生长最旺盛的8月，在内蒙古共采集来自47个样地的126个C₃植物样品，利用GPS记录每个样地的地理参数，并从全国陆地生态信息气象栅格数据库中提取每个样地的气象信息，在实验室利用同位素质谱仪测定叶片¹³C/¹²C.研究发现，C₃植物叶片δ^○13C随海拔升高而增大，随经纬度的增加而减小；降水和大气压强与叶片δ^○13C显著负相关，它们共同决定了叶片δ^○13C的空间格局，其中水分是主导因素；温度对叶片δ^○13C没有显著影响.

关键词: 叶片δ^○13C, 草地, C₃植物, 空间格局, 气候因子, 内蒙古

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

中图分类号:

周咏春，程希雷，樊江文，徐新阳. 内蒙古草地植被δ¹³C空间格局及其对气候因子的响应[J]. 东北大学学报:自然科学版, 2016, 37(2): 273-279.

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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内蒙古草地植被δ¹³C空间格局及其对气候因子的响应

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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