Trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China

Identification and assessment of heavy-metal (HM) contamination in soil–crop systems are prerequisites for treating contamination of cultivated land. Traditional assessment methods focus primarily on total soil HM concentrations, whereas the assessment of HMs that occur in available forms or are acc...

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Autores principales:	Xingjia Wang, Wenbo Li, Dongyan Wang, Songze Wu, Zhuoran Yan, Jiaqi Han
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Catastrophe-progression method Contamination assessment Bivariate Moran's I analysis Urban–rural transition zone Land use Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/3057d73db8804b8ea60b264caaaf1fa9
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spelling	oai:doaj.org-article:3057d73db8804b8ea60b264caaaf1fa92021-12-01T05:02:52ZTrinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China1470-160X10.1016/j.ecolind.2021.108329https://doaj.org/article/3057d73db8804b8ea60b264caaaf1fa92021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21009948https://doaj.org/toc/1470-160XIdentification and assessment of heavy-metal (HM) contamination in soil–crop systems are prerequisites for treating contamination of cultivated land. Traditional assessment methods focus primarily on total soil HM concentrations, whereas the assessment of HMs that occur in available forms or are accumulated by crops is increasingly considered essential for evaluating land contamination. Until now, there has been a lack of methods to adequately quantify the contamination status of soil–crop agroecosystems. We propose a ‘trinity’ assessment method covering total, available, and accumulated HMs involving a catastrophe-progression method and fusion algorithm. A typical urban–rural transition zone in NE China was selected for demonstration of the method and to identify HM spatial patterns associated with the impact of urbanization using GIS-based bivariate Moran's I analysis. Results indicate a spatial mismatch between total, available, and accumulated HM concentrations. Traditional methods indicate that soil–crop systems generally have less contamination and lower risk levels, whereas contaminated areas defined more holistically by the trinity method have a decreasing urban–rural trend. Furthermore, the bivariate Moran's I analysis indicates that land-use conflicts cause spatial clustering of HM contamination in cultivated lands where urbanization and industrialization have led to HM accumulation. Cluster patterns are significantly associated with the transition from urban to rural areas. These findings suggest that the trinity soil–crop system provides a practical tool for the quantitative assessment of the HM contamination status of peri-urban agriculture in major grain-producing areas, aiding the development of managerial strategies to prevent the occurrence of ecological hazards.Xingjia WangWenbo LiDongyan WangSongze WuZhuoran YanJiaqi HanElsevierarticleCatastrophe-progression methodContamination assessmentBivariate Moran's I analysisUrban–rural transition zoneLand useEcologyQH540-549.5ENEcological Indicators, Vol 132, Iss , Pp 108329- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Catastrophe-progression method Contamination assessment Bivariate Moran's I analysis Urban–rural transition zone Land use Ecology QH540-549.5
spellingShingle	Catastrophe-progression method Contamination assessment Bivariate Moran's I analysis Urban–rural transition zone Land use Ecology QH540-549.5 Xingjia Wang Wenbo Li Dongyan Wang Songze Wu Zhuoran Yan Jiaqi Han Trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China
description	Identification and assessment of heavy-metal (HM) contamination in soil–crop systems are prerequisites for treating contamination of cultivated land. Traditional assessment methods focus primarily on total soil HM concentrations, whereas the assessment of HMs that occur in available forms or are accumulated by crops is increasingly considered essential for evaluating land contamination. Until now, there has been a lack of methods to adequately quantify the contamination status of soil–crop agroecosystems. We propose a ‘trinity’ assessment method covering total, available, and accumulated HMs involving a catastrophe-progression method and fusion algorithm. A typical urban–rural transition zone in NE China was selected for demonstration of the method and to identify HM spatial patterns associated with the impact of urbanization using GIS-based bivariate Moran's I analysis. Results indicate a spatial mismatch between total, available, and accumulated HM concentrations. Traditional methods indicate that soil–crop systems generally have less contamination and lower risk levels, whereas contaminated areas defined more holistically by the trinity method have a decreasing urban–rural trend. Furthermore, the bivariate Moran's I analysis indicates that land-use conflicts cause spatial clustering of HM contamination in cultivated lands where urbanization and industrialization have led to HM accumulation. Cluster patterns are significantly associated with the transition from urban to rural areas. These findings suggest that the trinity soil–crop system provides a practical tool for the quantitative assessment of the HM contamination status of peri-urban agriculture in major grain-producing areas, aiding the development of managerial strategies to prevent the occurrence of ecological hazards.
format	article
author	Xingjia Wang Wenbo Li Dongyan Wang Songze Wu Zhuoran Yan Jiaqi Han
author_facet	Xingjia Wang Wenbo Li Dongyan Wang Songze Wu Zhuoran Yan Jiaqi Han
author_sort	Xingjia Wang
title	Trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China
title_short	Trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China
title_full	Trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China
title_fullStr	Trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China
title_full_unstemmed	Trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China
title_sort	trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: a case study in northeast china
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/3057d73db8804b8ea60b264caaaf1fa9
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Trinity assessment method applied to heavy-metal contamination in peri-urban soil–crop systems: A case study in northeast China

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