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	不同海拔祁连园柏树轮和叶片delta13C值的变化
其他题名	Variations of Tree-Ring and Foliar delta13C Values of Sabina przewalskii with Altitude
	陈拓; 陈发虎; 安黎哲; 刘晓宏
发表日期	2004
ISSN	1000-0240
卷号	26 期号:6 页码:767-771
中文摘要	测定了不同海拔的祁连园柏(Sabina przewalskii)树轮和叶片delta13C值以及叶片光合色素、可溶性糖和氮含量.结果表明: 树轮delta13C值重于叶片delta13C值, 并且没有明显的海拔趋势; 叶片delta13C值与叶片光合色素含量明显负相关, 但与叶片氮含量和可溶性糖含量没有相关关系; 近50 a来树轮delta13C值越来越低, 尽管不同海拔的树轮delta13C值的下降程度存在差异.叶片和树轮delta13C值的变化可能主要受气孔运动的影响, 近50 a来树轮delta13C值的下降是由于人类活动造成的.
英文摘要	Since industrial revolution, a large amount of anthropogenic CO_2 from fossil fuel combustion and deforestation has been emitted into atmosphere, and thus, the atmospheric CO_2 concentration has increased rapidly, while the delta~(13)C in atmospheric CO_2 becomes lower and lower due to Suess effect. Therefore, prediction of delta~(13)C is crucial for studying global change. In order to make an accurate prediction, it is necessary to understand its historical variation. The dynamics of delta~(13)C in plants can sensitively reflect the variation. However, few studies are done of the stable carbon isotopes from high mountain regions, which are considered under ecological influence. In present paper, tree -ring and foliar delta~(13)C values at different altitudes, as well as photosynthetic pigments, soluble sugar and nitrogen contents, were measured. The results showed that no strong dependency of delta~(13)C values on elevation was found both in tree rings and in leaves, but tree - ring delta~(13)C values were more negative than foliar delta~(13)C values. A significant negative relationship existed between foliar delta~(13)C values and photosynthetic pigments; however, foliar delta~(13)C values were not associated with leaf nitrogen and soluble sugar contents. During the past 50 years, treering delta~(13)C values becomes lower and lower, although the rates of decrease in delta~(13)C values at different altitudes were different. The analysis showed that stomatal movement might be one of the key factors determining foliar and treering delta~(13)C values, and the decreasing trend of treering delta~(13)C values in the past 50 years was due to anthropological activities.
关键词	祁连园柏(Sabina przewalskii)树轮 delta13C值海拔
英文关键词	Sabina przewalskii;tree rings;delta~(13)C values;altitude
语种	中文
WOS研究方向	Plant Sciences
WOS类目	PLANT SCIENCES
CSCD记录号	CSCD:1800771
来源期刊	冰川冻土
来源机构	中国科学院寒区旱区环境与工程研究所 ; 兰州大学 ; 中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/1853
推荐引用方式 GB/T 7714	陈拓,陈发虎,安黎哲,等. 不同海拔祁连园柏树轮和叶片delta13C值的变化[J]. 中国科学院寒区旱区环境与工程研究所, 兰州大学, 中国科学院青藏高原研究所,2004,26(6):767-771.
APA	陈拓,陈发虎,安黎哲,&刘晓宏.(2004).不同海拔祁连园柏树轮和叶片delta13C值的变化.冰川冻土,26(6),767-771.
MLA	陈拓,et al."不同海拔祁连园柏树轮和叶片delta13C值的变化".冰川冻土 26.6(2004):767-771.