Carbon isotope variations of modern soils in the eastern margin of the Tibetan Plateau and their controlling factors

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2021 > Vol18 No.4

	Carbon isotope variations of modern soils in the eastern margin of the Tibetan Plateau and their controlling factors
	Qi Lin; Qiao Yan-song; Liu Zong-xiu; Peng Sha-sha; Cheng Yu; Wang Yan; Zhang Xu-jiao; Tian Ming-zhong; Yang Shuai-bin; Bai Wen-bin
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2021
卷号	18 期号:4 页码:878-890
关键词	Soil δ C-13 C-4 plant Altitude Vertical zonality
ISSN号	1672-6316
英文摘要	The marginal areas of the Tibetan Plateau have great vertical altitude gradient and abundant vegetation, they are therefore the ideal places for investigating the relationships among carbon isotope composition (delta C-13) of modern soils, vegetation and environmental factors, which would be very useful for the reconstructions of both paleovegetation and paleoclimate. In this paper, modern soil samples collected in different vegetation vertical zones along 4 km elevation gradient in the eastern margin of the Tibetan Plateau were analyzed for their carbon isotope composition. The results show that the modern soils in different vegetation vertical zones show apparent difference of delta C-13 values, which get heavier in the sequence of mixed evergreen and deciduous broad-leaved forest (-27.28 parts per thousand on average), evergreen broad-leaved forest (-27.25 parts per thousand), subalpine shrub-meadow (-25.81 parts per thousand), subalpine coniferous forest (-25.81 parts per thousand), alpine bush-meadow (-25.16 parts per thousand), and drought-enduring shrub (-24.07 parts per thousand). 1800 m and 3500 m are two critical points for the delta C-13 values with respect to altitude. Specifically, the delta C-13 values decrease with increasing altitude below both points while increasing with increasing altitude above both points. Further analyses indicate that the declining delta C-13 values are mainly controlled by the decreasing proportion of C-4 plants with elevation and the increasing delta C-13 values are attributed to the plant physic-morphological adaptation to the alpine environment. In the absence of drought stress, temperature is the main controlling factor for the carbon isotopic variations with altitude gradient.
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/57313]
专题	Journal of Mountain Science_Journal of Mountain Science-2021_Vol18 No.4
推荐引用方式 GB/T 7714	Qi Lin,Qiao Yan-song,Liu Zong-xiu,et al. Carbon isotope variations of modern soils in the eastern margin of the Tibetan Plateau and their controlling factors[J]. JOURNAL OF MOUNTAIN SCIENCE,2021,18(4):878-890.
APA	Qi Lin.,Qiao Yan-song.,Liu Zong-xiu.,Peng Sha-sha.,Cheng Yu.,...&Bai Wen-bin.(2021).Carbon isotope variations of modern soils in the eastern margin of the Tibetan Plateau and their controlling factors.JOURNAL OF MOUNTAIN SCIENCE,18(4),878-890.
MLA	Qi Lin,et al."Carbon isotope variations of modern soils in the eastern margin of the Tibetan Plateau and their controlling factors".JOURNAL OF MOUNTAIN SCIENCE 18.4(2021):878-890.