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| Main Authors: | , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Environmental monitoring and assessment
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/41387659/ |
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| _version_ | 1868266111398576128 |
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| author | Tong, Siqi Fan, Yuqing Yang, Yali Shi, Yanfeng Li, Ming Wang, Ruonan Liu, Xiaohui Zhao, Bin |
| author_facet | Tong, Siqi Fan, Yuqing Yang, Yali Shi, Yanfeng Li, Ming Wang, Ruonan Liu, Xiaohui Zhao, Bin Tong, Siqi Fan, Yuqing Yang, Yali Shi, Yanfeng Li, Ming Wang, Ruonan Liu, Xiaohui Zhao, Bin |
| collection | PubMed - marine biology |
| contents | Distribution patterns of potentially toxic elements in rhizosphere and non-rhizosphere soils of dominant plant species in the Yellow River Delta. Tong, Siqi Fan, Yuqing Yang, Yali Shi, Yanfeng Li, Ming Wang, Ruonan Liu, Xiaohui Zhao, Bin Rhizosphere Environmental Monitoring Soil Pollutants China Soil Rivers Plants Coastal deltas are increasingly confronted with salinization and metal pollution. However, the vegetation and rhizosphere within the Yellow River Delta (YRD) are scarcely studied, and in particular, cross-seasonal studies are missing. Therefore, in the present study, root-zone and non-root-zone soil samples from four typical vegetation communities within the Yellow River Delta National Nature Reserve and the Shengli Yellow River Bridge area were collected. The soil physicochemical properties were determined, pollution levels and potential ecological hazards were assessed using the geo-accumulation index (I), potential ecological risk index (PERI), and pollution index (P). Results revealed pronounced salinization characteristics across the study area, with soil electrical conductivity, organic carbon, total nitrogen, and available phosphorus positively correlated with most metal(loid)s. The concentrations of potentially toxic elements (PTEs) were generally higher in non-rhizosphere soils than in rhizosphere soils, exhibiting a distinct vegetation gradient (Suaeda salsa > Tamarix chinensis > Phragmites australis (HSR) > Phragmites australis (FWR)). Except for chromium, the metal(loid) concentrations and ecological risks were higher in winter than in summer. Cadmium pollution was most severe, frequently exceeding national standards; mercury and arsenic concentrations were generally low but exhibited significant seasonal and spatial variations. The I results indicated that most of the study area was uncontaminated by the majority of elements, with the exception of localized mild to moderate pollution by cadmium. Mercury displayed the lowest contamination levels. The PERI model identified cadmium and mercury as primary contributors to potential ecological hazards; the P results further confirmed cadmium as the priority pollutant. At the rhizosphere scale, there are differential sequestration and regulation mechanisms of metal (loid)s by salt-tolerant vegetation, establishing cadmium as the primary target for management. This suggests a seasonal and vegetation-directed precision remediation approach, providing a scientific basis for ecological security and sustainable development in the YRD and the broader Yellow River basin. |
| format | Artículo científico |
| id | pubmed_41387659 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Environmental monitoring and assessment |
| record_format | pubmed |
| spellingShingle | Distribution patterns of potentially toxic elements in rhizosphere and non-rhizosphere soils of dominant plant species in the Yellow River Delta. Tong, Siqi Fan, Yuqing Yang, Yali Shi, Yanfeng Li, Ming Wang, Ruonan Liu, Xiaohui Zhao, Bin Rhizosphere Environmental Monitoring Soil Pollutants China Soil Rivers Plants Distribution patterns of potentially toxic elements in rhizosphere and non-rhizosphere soils of dominant plant species in the Yellow River Delta. Tong, Siqi Fan, Yuqing Yang, Yali Shi, Yanfeng Li, Ming Wang, Ruonan Liu, Xiaohui Zhao, Bin Rhizosphere Environmental Monitoring Soil Pollutants China Soil Rivers Plants Coastal deltas are increasingly confronted with salinization and metal pollution. However, the vegetation and rhizosphere within the Yellow River Delta (YRD) are scarcely studied, and in particular, cross-seasonal studies are missing. Therefore, in the present study, root-zone and non-root-zone soil samples from four typical vegetation communities within the Yellow River Delta National Nature Reserve and the Shengli Yellow River Bridge area were collected. The soil physicochemical properties were determined, pollution levels and potential ecological hazards were assessed using the geo-accumulation index (I), potential ecological risk index (PERI), and pollution index (P). Results revealed pronounced salinization characteristics across the study area, with soil electrical conductivity, organic carbon, total nitrogen, and available phosphorus positively correlated with most metal(loid)s. The concentrations of potentially toxic elements (PTEs) were generally higher in non-rhizosphere soils than in rhizosphere soils, exhibiting a distinct vegetation gradient (Suaeda salsa > Tamarix chinensis > Phragmites australis (HSR) > Phragmites australis (FWR)). Except for chromium, the metal(loid) concentrations and ecological risks were higher in winter than in summer. Cadmium pollution was most severe, frequently exceeding national standards; mercury and arsenic concentrations were generally low but exhibited significant seasonal and spatial variations. The I results indicated that most of the study area was uncontaminated by the majority of elements, with the exception of localized mild to moderate pollution by cadmium. Mercury displayed the lowest contamination levels. The PERI model identified cadmium and mercury as primary contributors to potential ecological hazards; the P results further confirmed cadmium as the priority pollutant. At the rhizosphere scale, there are differential sequestration and regulation mechanisms of metal (loid)s by salt-tolerant vegetation, establishing cadmium as the primary target for management. This suggests a seasonal and vegetation-directed precision remediation approach, providing a scientific basis for ecological security and sustainable development in the YRD and the broader Yellow River basin. |
| title | Distribution patterns of potentially toxic elements in rhizosphere and non-rhizosphere soils of dominant plant species in the Yellow River Delta. |
| topic | Rhizosphere Environmental Monitoring Soil Pollutants China Soil Rivers Plants |
| url | https://pubmed.ncbi.nlm.nih.gov/41387659/ |