气候变化领域集成服务门户(CCPortal): Foliar delta C-13 and delta N-15 values of C-3 plants in the Ethiopia Rift Valley and their environmental controls

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DOI	10.1007/s11434-007-0165-5
	Foliar delta C-13 and delta N-15 values of C-3 plants in the Ethiopia Rift Valley and their environmental controls
	Liu XiaoHong; Zhao LiangJu; Gasaw, Menassie; Gao DengYi; Qin DaHe; Ren JiaWen
发表日期	2007
ISSN	1001-6538
起始页码	1265
结束页码	1273
卷号	52 期号:9
英文摘要	The foliar C and N stable isotopic compositions (delta C-13 and delta N-15) and the relationships between these compositions and environmental factors of C-3 plants in the Ethiopia Rift Valley were investigated. There were three distribution patterns for foliar delta C-13 with mean values of -26.7 parts per thousand +/- 0.4 parts per thousand, -29.7 parts per thousand +/- 0.6 parts per thousand, and -26.9 parts per thousand +/- 1.2 parts per thousand in cold-moist, temperate-moist, and arid-hot environments, respectively. The 815 N values ranged from -1.4 parts per thousand +/- 1.7 parts per thousand to 14.3 parts per thousand +/- 0.1 parts per thousand, with higher values under arid-hot conditions and the lowest values in plants growing at higher altitudes under cold-moist conditions. A strong negative relationship between mean annual precipitation and delta N-15 explained more than half of the observed variation in the delta N-15 values (r(2) = 0.54, P < 0.001); a modest positive relationship was also found between delta N-15 and temperature (r(2) = 0.32, P < 0.01). A weakly positive relationship existed between delta C-13 and temperature, and changesin delta C-13 values with precipitation and altitude followed quadratic curves. This suggests a shift in the effects of water and heat conditions caused by altitude on carbon isotopic discrimination.
英文关键词	carbon stable isotopes; nitrogen stable isotopes; precipitation; temperature; altitude; Ethiopia Rift Valley
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
来源期刊	CHINESE SCIENCE BULLETIN
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158688
作者单位	Liu, XH (corresponding author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Cryosphere & Environm, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Liu XiaoHong,Zhao LiangJu,Gasaw, Menassie,et al. Foliar delta C-13 and delta N-15 values of C-3 plants in the Ethiopia Rift Valley and their environmental controls[J],2007,52(9).
APA	Liu XiaoHong,Zhao LiangJu,Gasaw, Menassie,Gao DengYi,Qin DaHe,&Ren JiaWen.(2007).Foliar delta C-13 and delta N-15 values of C-3 plants in the Ethiopia Rift Valley and their environmental controls.CHINESE SCIENCE BULLETIN,52(9).
MLA	Liu XiaoHong,et al."Foliar delta C-13 and delta N-15 values of C-3 plants in the Ethiopia Rift Valley and their environmental controls".CHINESE SCIENCE BULLETIN 52.9(2007).