Distribution of carbon isotope composition of modern soils on the Qinghai-Tibetan Plateau

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（1985-2004）

	Distribution of carbon isotope composition of modern soils on the Qinghai-Tibetan Plateau
	Lu, HY; Wu, NQ; Gu, ZY; Guo, ZT; Wang, L; Wu, HB; Wang, G; Zhou, LP; Han, JM; Liu, TS
刊名	BIOGEOCHEMISTRY
	2004-09
卷号	70 期号:2 页码:273-297
关键词	carbon isotope modem soils precipitation Qinghai-Tibetan Plateau temperature vegetation
文献子类	Article
英文摘要	This paper presents a large data set on carbon isotope composition (delta(13)C) of modem soils which were collected under the main vegetation communities along an altitude of 1250-5500 m above sea level in the Qinghai-Tibetan Plateau. The delta(13)C values of 198 samples range from -28.6 to -15.1parts per thousand versus PDB and exhibit a clean relation to different vegetation communities from forest (-25.9 +/- 1.2parts per thousand) to shrub (-24.7 +/- 1.4parts per thousand), steppe (-23.1 +/- 1.3parts per thousand), alpine meadow (-23.6 +/- 0.7parts per thousand), alpine desert steppe (-21.3 +/- 1.6parts per thousand), and alpine desert (-18.9 +/- 2.5parts per thousand). We attributed the observed variability in delta(13)C values to that the mean annual precipitation (MAP) and the mean annual temperature (MAT) are the main factors controlling the distribution of vegetation types in the Tibetan Plateau, which causes the change in carbon isotope composition of modem soils at any given altitude. The result of both linear and nonlinear regression analyses also confirms that MAP and MAT are the major factors affecting the delta(13)C values of surface soils. In the absence of favorable moisture and temperature conditions, low pCO(2) alone is not sufficient to cause the distinct changes in carbon isotope composition of modem soils in the Tibetan Plateau. This study provides some fundamental information on the carbon isotope composition of terrestrial carbon pools and bears some practical significance for the use of carbon isotope data to document vegetation changes and environmental conditions of the high plateau in the past.
学科主题	Environmental Sciences & Ecology ; Geology
WOS关键词	STOMATAL CONDUCTANCE ; PLANT ABUNDANCE ; CLIMATE ; DISCRIMINATION ; GRASSES ; C-4 ; CO2 ; PHOTOSYNTHESIS ; TEMPERATURE ; PALEOSOLS
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000226518900004
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/11948]
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Lu, HY,Wu, NQ,Gu, ZY,et al. Distribution of carbon isotope composition of modern soils on the Qinghai-Tibetan Plateau[J]. BIOGEOCHEMISTRY,2004,70(2):273-297.
APA	Lu, HY.,Wu, NQ.,Gu, ZY.,Guo, ZT.,Wang, L.,...&Liu, TS.(2004).Distribution of carbon isotope composition of modern soils on the Qinghai-Tibetan Plateau.BIOGEOCHEMISTRY,70(2),273-297.
MLA	Lu, HY,et al."Distribution of carbon isotope composition of modern soils on the Qinghai-Tibetan Plateau".BIOGEOCHEMISTRY 70.2(2004):273-297.