Enrichment of stable carbon and nitrogen isotopes of plant populations and plateau pikas along altitudes

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	Enrichment of stable carbon and nitrogen isotopes of plant populations and plateau pikas along altitudes
	Yi, X. F.; Yang, Y. Q.
	2006
发表期刊	JOURNAL OF ANIMAL AND FEED SCIENCES
卷号	15 期号:4 页码:661-667
文章类型	Article
摘要	Stable carbon and nitrogen isotope ratios were measured in plant populations and plateau pikas to determine enrichment in stable isotopes of three alpine meadow ecosystems at different elevations in the Qinghai-Tibet Plateau. The results indicated that stable carbon isotope signatures of plant populations at the three locations showed significant variations, delta C-13 of plant populations showed an enrichment of 0.86 parts per thousand per 1000 in over the linear proportion of the altitudinal response, while stable nitrogen isotopes showed no apparent difference. The stable nitrogen isotopes of plateau pikas became significantly isotopically heavier along altitudinal gradients and showed an enrichment of 3.17 parts per thousand/km. Stable carbon isotopes showed no significance, however, and the enrichment of 0.448 parts per thousand/km. delta C-13 and delta N-15 in plateau pikas were not significantly correlated. There appeared to be segregation between the metabolism of stable carbon and nitrogen isotopes of plateau pikas. Variances in metabolic rate at lower water availability and temperatures are presumed to be the main cause of enrichment of stable nitrogen isotopes along altitudinal gradients. Attention should be paid to construct trophic positions and to trace food chain information based oil an isotopic enrichment model.; Stable carbon and nitrogen isotope ratios were measured in plant populations and plateau pikas to determine enrichment in stable isotopes of three alpine meadow ecosystems at different elevations in the Qinghai-Tibet Plateau. The results indicated that stable carbon isotope signatures of plant populations at the three locations showed significant variations, delta C-13 of plant populations showed an enrichment of 0.86 parts per thousand per 1000 in over the linear proportion of the altitudinal response, while stable nitrogen isotopes showed no apparent difference. The stable nitrogen isotopes of plateau pikas became significantly isotopically heavier along altitudinal gradients and showed an enrichment of 3.17 parts per thousand/km. Stable carbon isotopes showed no significance, however, and the enrichment of 0.448 parts per thousand/km. delta C-13 and delta N-15 in plateau pikas were not significantly correlated. There appeared to be segregation between the metabolism of stable carbon and nitrogen isotopes of plateau pikas. Variances in metabolic rate at lower water availability and temperatures are presumed to be the main cause of enrichment of stable nitrogen isotopes along altitudinal gradients. Attention should be paid to construct trophic positions and to trace food chain information based oil an isotopic enrichment model.
关键词	Stable Carbon Isotope Stable Nitrogen Isotope Plateau Pikas Altitudinal Gradients Qinghai-tibet Plateau
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
学科领域	农业科学
关键词[WOS]	DELTA-C-13 ; PHOTOSYNTHESIS ; DISCRIMINATION ; CLIMATE ; RATIOS ; N-15
收录类别	SCI
语种	英语
WOS研究方向	Agriculture
WOS类目	Agriculture, Dairy & Animal Science
WOS记录号	WOS:000243138200013
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1303
专题	中国科学院西北高原生物研究所
作者单位	1.Henan Univ Sci & Technol, Coll Agr, Luoyang 471003, Peoples R China 2.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Yi, X. F.,Yang, Y. Q.. Enrichment of stable carbon and nitrogen isotopes of plant populations and plateau pikas along altitudes[J]. JOURNAL OF ANIMAL AND FEED SCIENCES,2006,15(4):661-667.
APA	Yi, X. F.,&Yang, Y. Q..(2006).Enrichment of stable carbon and nitrogen isotopes of plant populations and plateau pikas along altitudes.JOURNAL OF ANIMAL AND FEED SCIENCES,15(4),661-667.
MLA	Yi, X. F.,et al."Enrichment of stable carbon and nitrogen isotopes of plant populations and plateau pikas along altitudes".JOURNAL OF ANIMAL AND FEED SCIENCES 15.4(2006):661-667.

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