气候变化领域集成服务门户(CCPortal): Ecological risk assessment and transmission of soil heavy metals in pastoral areas of the Tibetan plateau based on network environment analysis

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DOI	10.1016/j.scitotenv.2023.167197
	Ecological risk assessment and transmission of soil heavy metals in pastoral areas of the Tibetan plateau based on network environment analysis
	Ning, Wenjing; Hu, Yuwei; Feng, Siyao; Cao, Min; Luo, Jie
发表日期	2023
ISSN	0048-9697
EISSN	1879-1026
卷号	905
英文摘要	The Qinghai-Tibet Plateau is distinguished by its diverse ecosystems and biodiversity, which are highly dependent on their soil. In this study, a comprehensive analysis was conducted to assess the ecological risks in Maqin County, located on the Qinghai-Tibet Plateau, along with the local background values of soil elements, level of element enrichment, and source appointment of soil elements. The findings show that the background soil element levels in Maqin County were greater than the average soil content values in China. The soils in the study area exhibited pollution levels ranging from weak to moderate. The positive matrix factorization (PMF) model was employed to successfully categorized soil elements into four sources: F1 (natural sources), F2 (grazing sources), F3 (volcanic and rock fracture sources), and F4 (intrusive and deep rock source). Based on the characteristics of the ecological communities and the network environmental analysis model, ecological risks were directly introduced through vegetation and soil microorganisms, with subsequent transmission to other components of the ecosystem through the food chain. The integrated risks associated with vegetation, herbivores, soil microorganisms, and carnivores were 0.0106, 0.00193, 0.0282, and 0.00132, respectively. Notably, soil microorganisms were found to be the primary contributors to the total ecological risk in the study area. Furthermore, network environmental analysis and human health risk models revealed that F1, F2, F3, and F4 accounted for 16.85 %, 8.90 %, 21.76 %, and 52.49 % of the input risk of vegetation and soil microorganisms, respectively. Particularly, F4 emerged as the largest contributor to human health risks. This study provides valuable information for the preservation of the ecological environment in pastoral areas, contributing to the global promotion of sustainable ecological practices.
关键词	Qinghai-Tibet Plateau Pastoral ecosystem Ecological risk transmission Source identification
英文关键词	POTENTIALLY TOXIC ELEMENTS; PB-ZN DEPOSIT; POLLUTION; CONTAMINATION; PROVINCE; GENESIS; CONSTRAINTS; PERSPECTIVE; MATTER; MODEL
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001159047600001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283339
作者单位	Nanjing University; Yangtze University; University of Leicester
推荐引用方式 GB/T 7714	Ning, Wenjing,Hu, Yuwei,Feng, Siyao,et al. Ecological risk assessment and transmission of soil heavy metals in pastoral areas of the Tibetan plateau based on network environment analysis[J],2023,905.
APA	Ning, Wenjing,Hu, Yuwei,Feng, Siyao,Cao, Min,&Luo, Jie.(2023).Ecological risk assessment and transmission of soil heavy metals in pastoral areas of the Tibetan plateau based on network environment analysis.SCIENCE OF THE TOTAL ENVIRONMENT,905.
MLA	Ning, Wenjing,et al."Ecological risk assessment and transmission of soil heavy metals in pastoral areas of the Tibetan plateau based on network environment analysis".SCIENCE OF THE TOTAL ENVIRONMENT 905(2023).