Trace metals of needles and litter in timberline forests in the Eastern of Tibetan Plateau, China

Tang, Ronggui; Luo, Jing; Yang, Peijun; She, Jia; Chen, Youchao; Gong, Yue; Zhou, Jun

doi:10.1016/j.ecolind.2014.06.003

Cited by 16 publications

(7 citation statements)

References 39 publications

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“…The average concentration of Cr in plants of this study was significantly higher than that in other plants such as S. purpurea, K. Slenderbranch, and K. pygmaea growing in soils along the Qinghai-Tibet highway while the average concentration of Cu in plants of this study was similar with that previously reported (Zhang et al, 2016). The average concentrations of Cr, Co, Ni, V, and Pb in plants growing in the study area were significantly higher than those in the needles or organs/tissues of timberline forests in the eastern of Tibetan Plateau (Luo et al, 2013;Tang et al, 2014). Interestingly, the average concentrations of Zn and Cu in plants of this study were 2-3 times higher than those in vetch seeds of the Qinghai-Tibetan Plateau (Mao et al, 2015).…”

Section: Ecological Risks Posed By Trace Elements In Topsoils Of the Study Areasupporting

confidence: 88%

Distribution, pollution, bioaccumulation, and ecological risks of trace elements in soils of the northeastern Qinghai-Tibet Plateau

Lü

et al. 2018

Ecotoxicology and Environmental Safety

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Environmental quality of the northeastern Qinghai-Tibet Plateau has attracted more attention due to increasing anthropogenic disturbance. Therefore, this study investigated the distribution, pollution, ecological risks, and bioaccumulation of 12 target heavy metals and 16 rare earth elements (REEs) in soils of this area. The average concentrations of target trace elements in soils ranged from 0.16 (Hg) to 500.46 (Cr) mg/kg. Pb caused more serious pollution than the other elements based on geo-accumulation index evaluation. Hg exhibited the strongest enrichment feature with the average enrichment factor of 8.41. Compare with modified contamination degree and pollution load index, Nemerow pollution index method obtained the most serious evaluation results that 45.67% and 16.54% of sampling sites possessed high and moderate pollution. Evaluation results of potential ecological risk index showed that trace elements in soils posed very high and considerable ecological risks in 34.65% and 7.09% of sampling sites, respectively. Mining area was the region with the most serious pollution and ecological risks. Average bioaccumulation factor (BCF) values of target trace elements ranged from 0.05 (REEs) to 2.67 (Cr). Cr was the element that was easier to bio-accumulate in plants of the study area than the other target elements. It is in urgent need to take effective measures for controlling current pollution and potential ecological risks of trace elements in soils of the northeastern Qinghai-Tibet Plateau.

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Section: Ecological Risks Posed By Trace Elements In Topsoils Of the Study Areasupporting

confidence: 88%

Distribution, pollution, bioaccumulation, and ecological risks of trace elements in soils of the northeastern Qinghai-Tibet Plateau

Lü

et al. 2018

Ecotoxicology and Environmental Safety

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“…This phenomenon presented that the factors of effect on THg concentrations in litterfall were not unique, and more investigations like Hg isotope analysis should be performed. Over all, litterfall showed a high accumulation of trace metals in this research and also in our previous results (Tang et al 2014). Interestingly, TAs and THg concentrations in leaves and twigs showed opposite results (Fig.…”

Section: Differences Of Thg and Tas Concentrations In Diverse Plant Pcontrasting

confidence: 55%

“…Previous studies of five toxic elements of plant-soil ecosystem in the timberline of the Tibet Plateau mainly concentrated on Pb, Cd, and Cr (Luo et al 2013a, b;Tang et al 2015Tang et al , 2014. Trace metals in topsoils, atmosphere, and snow of the Tibet Plateau also were reported (Cong et al 2011(Cong et al , 2010Huang et al 2013aHuang et al , b, 2012aLoewen et al 2007;Sheng et al 2012;Tripathee et al 2014;Yanao and Junliang 1993;Zhang et al 2002).…”

Section: Responsible Editor: Stuart Simpsonmentioning

confidence: 83%

Spatial distribution and temporal trends of mercury and arsenic in remote timberline coniferous forests, eastern of the Tibet Plateau, China

Tang

Wang

Luo

et al. 2015

Environ Sci Pollut Res

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An intensive investigation was conducted to study the spatial distribution and temporal variety trend of mercury and arsenic in plant tissue and soil profile in the eastern of the Tibet Plateau and to explore the possible sources of these two elements. At present, rare information is available on mercury (Hg) and arsenic (As) of timberline forests in the Tibet Plateau. Here, we present preliminary results on these two elements in leaves, twigs, root, litterfall, and soil. Geostatistical analyst of the ArcGIS 10.0 was used to determine the trait of spatial distribution of these two elements. Total arsenic (TAs) mean concentrations in the leaves, twigs, root, litterfall, and A- and C-layer soil ranged from 0.12 mg kg(-1) (n = 60), 0.35 mg kg(-1) (n = 60), 0.48 mg kg(-1) (n = 42), 1.52 mg kg(-1) (n = 84), 16.51 mg kg(-1) (n = 69), and 26.72 mg kg(-1) (n = 69), respectively. Total Hg (THg) mean concentrations in leaves, twigs, root, litterfall, and A- and C-layer soil were 0.0121 mg kg(-1) (n = 60), 0.0078 mg kg(-1) (n = 60), 0.0171 mg kg(-1) (n = 42), 0.0479 mg kg(-1) (n = 84), 0.0852 mg kg(-1) (n = 75), and 0.0251 mg kg(-1) (n = 75), respectively. In general, litterfall trended to accumulate high concentrations of Hg and As. Mercury in the timberline forest showed an increasing trend, whereas arsenic concentrations showed a decreasing trend in A-layer soil and an increasing trend in C-layer soil due to the easy mobile ability of As. Southwest and southeast monsoon could be the influencing factors, and Hg emission from India and China was the possible source of this study area through using a HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory) model. It is believed that these observations may offer scientists and policymakers additional understanding of Hg and As concentrations in the remote timberline area, eastern of the Tibet Plateau.

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“…Co concentrations in higher plant tissues have been reported to be usually below 1 mg kg −1 . Ni concentrations in needles generally do not exceed 5 mg kg −1 [48,49]. Based on our results, it can be concluded that the concentrations of Ni and Cr of needle litter in this study area were high.…”

Section: Element Concentrations and Fluxes Of The Needle Littersupporting

confidence: 48%

Production, Concentration and Flux of Major and Trace Elements in Juniperus przewalskii Litter of the Qilian Mountains, China

Huang

Zang

Zhao

et al. 2023

Forests

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Forest litter is an important guarantee for maintaining forest soil fertility and circulating material in forest ecosystems. The input of litter plays an important role in soil organic matter formation and biogeochemical cycles in forest ecosystems. However, the production and elements concentrations of Juniperus przewalskii (JP) litter in the Qilian Mountains are still unknown. In this study, we investigated the production of needle, branch and bark, cone, and impurity litters. We determined the concentrations and fluxes of major (K, Mg, Al, and Fe) and trace (Na, Mn, Zn, Cr, Ni, Cu, Pb, Co, Cd, and Ag) elements in needle litter of JP from September 2020 to August 2021. The results showed that the annual litter production was 4040.74 ± 495.96 kg ha−1 a−1. Needle and cone litters were the main components of the total litter production. The major elements (MEs) and trace elements (TEs) fluxes of litter were consistent with the litter production trend. The concentrations and fluxes of MEs and TEs in needle litter decreased in the order: K > Mg > Al > Fe > Na > Mn > Zn > Cr > Ni > Cu > Pb > Co > Cd > Ag. These results have important implications for understanding the migration processes of MEs and TEs in forest ecosystems of the Qilian Mountains.

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Trace metals of needles and litter in timberline forests in the Eastern of Tibetan Plateau, China

Cited by 16 publications

References 39 publications

Distribution, pollution, bioaccumulation, and ecological risks of trace elements in soils of the northeastern Qinghai-Tibet Plateau

Distribution, pollution, bioaccumulation, and ecological risks of trace elements in soils of the northeastern Qinghai-Tibet Plateau

Spatial distribution and temporal trends of mercury and arsenic in remote timberline coniferous forests, eastern of the Tibet Plateau, China

Production, Concentration and Flux of Major and Trace Elements in Juniperus przewalskii Litter of the Qilian Mountains, China

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