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当前位置: 首页 > 文章 > 高寒草甸消费者种群稳定碳、氮同位素组成的海拔分异 生态学杂志 2007,26 (1) 40-45
Position: Home > Articles > Altitudinal differentiation of stable carbon and nitrogen isotopes composition of main consumers on alpine meadow of east Qinhai-Tibet Plateau Chinese Journal of Ecology 2007,26 (1) 40-45

高寒草甸消费者种群稳定碳、氮同位素组成的海拔分异

作  者：
宋大伟;李明财;李来兴;易现峰;张晓爱
单  位：
吉林师范大学;中国科学院青藏高原研究所;河南科技大学农学院;中国科学院西北高原生物研究所
关键词：
高寒草甸;稳定碳、氮同位素;消费者种群
摘  要：
通过测定青藏高原东部高寒区不同海拔主要植物和消费者种群(雀形目鸟类和小型哺乳类)的稳定碳、氮同位素比值,研究了高寒草甸消费者种群同位素组成特征及其影响因素。结果表明:植物平均稳定碳同位素随海拔升高表现出明显的增加趋势;消费者种群稳定碳、氮同位素随海拔的升高有明显的富集效应。雀形目鸟类种群稳定碳、氮同位素随海拔的升高均呈明显增加趋势;小型哺乳类稳定碳同位素随海拔上升不明显,而稳定氮同位素具有明显的增大趋势。消费者种群稳定碳、氮同位素沿海拔梯度的富集效应,一方面与植物稳定同位素在海拔梯度上的富集密切相关;另一方面与海拔和纬度变化所引起一系列环境因子的变化在一定程度上影响到动物的稳定同位素分布模式。另外,在高寒草甸地区,与雀形目鸟类相比,小型哺乳类在动物稳定同位素组成的代谢过程中更容易受到环境改变的影响。
译  名：
Altitudinal differentiation of stable carbon and nitrogen isotopes composition of main consumers on alpine meadow of east Qinhai-Tibet Plateau
作  者：
SONG Da-wei~1, LI Ming-cai~ 2,3,4 , LI Lai-xing~3, YI Xian-feng~5, ZHANG Xiao-ai~3 ( ~1Jilin Normal University, Siping 136000, Jilin, China; ~2Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China; ~3Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810001, China; ~4Graduate University of Chinese Academy of Sciences, Beijing 100039, China; ~5College of Agronomy, Henan University of Science and Technology, Luoyang 471003, Henan, China).
关键词：
alpine meadow; stable carbon and nitrogen isotopes; consumers
摘  要：
By measuring the δ ~ 13 C/δ ~ 15 N ratios of main plants and their consumers (passerine birds and small mammals) on different altitudes alpine meadow of east Qinhai-Tibet Plateau, this paper studied the characteristics of the consumers’ stable carbon and nitrogen isotopes composition and their relationships with the plants’ stable isotopes composition and environmental factors. The results showed that the average δ ~ 13 C value of plants increased with increasing altitude, and the stable C and N isotopes composition of the consumers also increased significantly from low to high altitude. Both δ ~ 13 C and δ ~ 15 N of passerine birds had obvious increase with increasing altitude, while the δ ~ 13 C value of small mammals did not change with altitude, but their δ ~ 15 N had a significant increase from low to high altitude. It was suggested that the variation of plants’ stable carbon and nitrogen isotopes composition might be the important factor determining the altitudinal differentiation of the consumers’ stable isotopes composition, and the variation of environmental factors due to the changes of altitude and latitude could partially contribute to the stable carbon and nitrogen isotopes composition of the consumers. Compared with passerine birds, small mammals in their metabolic processes of stable carbon and nitrogen isotopes were more sensitive to the changes of the environment.

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