PLANT GROWTH AND SOIL METAL CONCENTRATIONS A SPATIAL EFFECTS MODEL

An ambitious citizen science effort in the city of Indianapolis (IN, USA) led to the collection and analysis of a large number of samples at the property scale, facilitating the analysis of differences in soil metal concentrations as a function of property location (i.e., dripline, yard, and street) and location within the city. This effort indicated that dripline soils had substantially higher values of lead and zinc than other soil locations on a given property, and this pattern was heightened in properties nearer the urban core. Soil lead values typically exceeded the levels deemed safe for children’s play areas in the United States (<400 ppm), and almost always exceeded safe gardening guidelines (<200 ppm). As a whole, this study identified locations within properties and cities that exhibited the highest exposure risk to children, and also exhibited the power of citizen science to produce data at a spatial scale (i.e., within a property boundary), which is usually impossible to feasibly collect in a typical research study.

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Plant metal concentrations in Theobroma cacao as affected by soil metal availability in different soil types

Chemosphere ◽

10.1016/j.chemosphere.2020.127749 ◽

2021 ◽

Vol 262 ◽

pp. 127749

Author(s):

Caleb Lewis ◽

Adrian M. Lennon ◽

Gaius Eudoxie ◽

Paramasivam Sivapatham ◽

Pathmanathan Umaharan

Keyword(s):

Theobroma Cacao ◽

Soil Types ◽

Metal Availability ◽

Metal Concentrations ◽

Soil Metal

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Metal bioaccumulation alleviates the negative effects of herbivory on plant growth

Scientific Reports ◽

10.1038/s41598-021-98483-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Grazieli F. Dueli ◽

Og DeSouza ◽

Servio P. Ribeiro

Keyword(s):

Plant Growth ◽

Metal Concentration ◽

Plant Species ◽

Metal Ion ◽

Natural Habitat ◽

Plant Responses ◽

Metal Bioaccumulation ◽

Negative Effects ◽

Quantitative Evidence ◽

Soil Metal

AbstractMetalliferous soils can selectively shape plant species’ physiology towards tolerance of high metal concentrations that are usually toxic to organisms. Some adapted plant species tolerate and accumulate metal in their tissues. These metals can serve as an elemental defence but can also decrease growth. Our investigation explored the capacity of natural metal accumulation in a tropical tree species, Eremanthus erythropappus (Asteraceae) and the effects of such bioaccumulation on plant responses to herbivory. Seedlings of E. erythropappus were grown in a glasshouse on soils that represented a metal concentration gradient (Al, Cu, Fe, Mn and Zn), and then the exposed plants were fed to the herbivores in a natural habitat. The effect of herbivory on plant growth was significantly mediated by foliar metal ion concentrations. The results suggest that herbivory effects on these plants change from negative to positive depending on soil metal concentration. Hence, these results provide quantitative evidence for a previously unsuspected interaction between herbivory and metal bioaccumulation on plant growth.

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Mapping the Urban Lead Exposome: A Detailed Analysis of Soil Metal Concentrations at the Household Scale Using Citizen Science

10.20944/preprints201806.0271.v1 ◽

2018 ◽

Author(s):

Gabriel Filippelli ◽

Jessica Adamic ◽

Deborah Nichols ◽

John Shukle ◽

Emeline Frix

Keyword(s):

Citizen Science ◽

Metal Concentrations ◽

Soil Lead ◽

Urban Core ◽

Lead And Zinc ◽

Property Scale ◽

The Us ◽

Core Soil ◽

The City ◽

Soil Metal

An ambitious citizen-science effort in the city of Indianapolis (Indiana, USA) led to the collection and analysis of a large number of samples at the property scale, facilitating the analysis of differences in soil metal concentrations as a function of property location (i.e., dripline, yard, and street) and location within the city. This effort indicated that dripline soils had substantially higher values of lead and zinc than other soil locations on a given property, and this pattern was heightened in properties nearer the urban core. Soil lead values typically exceeded the levels deemed safe for children’s play areas in the US (<400 ppm), and almost always exceeded safe gardening guidelines (<200 ppm). As a whole, this study identified locations within properties, and cities, that exhibited the highest exposure risk to children, and also exhibited the power of citizen science to produce data at a spatial scale (i.e., within a property boundary) that is usually impossible to feasibly collect in a typical research study.

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Effect of Water-Thoroughly-Rinsing in the Artificially Metal-Contaminated Soil Preparation on Final Soil Metal Concentrations

Journal of Korean Society of Environmental Engineers ◽

10.4491/ksee.2011.33.9.670 ◽

2011 ◽

Vol 33 (9) ◽

pp. 670-676 ◽

Cited By ~ 1

Author(s):

Jeong-Hyun Hur ◽

Seung-Woo Jeong

Keyword(s):

Contaminated Soil ◽

Metal Concentrations ◽

Effect Of Water ◽

Soil Preparation ◽

Soil Metal

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Measuring Soil Metal Bioavailability in Roadside Soils of Different Ages

Environments ◽

10.3390/environments7100091 ◽

2020 ◽

Vol 7 (10) ◽

pp. 91

Author(s):

Shamali De Silva ◽

Trang Huynh ◽

Andrew S. Ball ◽

Demidu V. Indrapala ◽

Suzie M. Reichman

Keyword(s):

Linear Models ◽

Intrinsic Rate ◽

Strong Relationship ◽

Control Site ◽

Roadside Soil ◽

Metal Bioavailability ◽

Roadside Soils ◽

Metal Concentrations ◽

Total Metal ◽

Soil Metal

Finding a reliable method to predict soil metal bioavailability in aged soil continues to be one of the most important problems in contaminated soil chemistry. To investigate the bioavailability of metals aged in soils, we used roadside soils that had accumulated metals from vehicle emissions over a range of years. We collected topsoil (0–10 cm) samples representing new-, medium- and old-aged roadside soils and control site soil. These soils were studied to compare the ability of the diffusive gradients in thin films technique (DGT), soil water extraction, CaCl2 extraction, total metal concentrations and optimised linear models to predict metal bioavailability in wheat plants. The response time for the release of metals and the effect on metal bioavailability in field aged soils was also studied. The DGT, and extractable metals such as CaCl2 extractable and soil solution metals in soil, were not well correlated with metal concentrations in wheat shoots. In comparison, the strongest relationships with concentrations in wheat shoots were found for Ni and Zn total metal concentrations in soil (e.g., Ni r = 0.750, p = 0.005 and Zn r = 0.833, p = 0.001); the correlations were still low, suggesting that total metal concentrations were also not a robust measure of bioavailability. Optimised linear models incorporating soil physiochemical properties and metal extracts together with road age as measure of exposure time, demonstrated a very strong relationship for Mn R2 = 0.936; Ni R2 = 0.936 and Zn R2 = 0.931. While all the models developed were dependent on total soil metal concentrations, models developed for Mn and Zn clearly demonstrated the effect of road age on metal bioavailability. Therefore, the optimised linear models developed have the potential for robustly predicting bioavailable metal concentrations in field soils where the metals have aged in situ. The intrinsic rate of release of metals increased for Mn (R2 = 0.617, p = 0.002) and decreased for Cd (R2 = 0.456, p = 0.096), Cu (R2 = 0.560, p = 0.083) and Zn (R2 =0.578, p = 0.072). Nickel did not show any relationship between dissociation time (Tc) and road age. Roadside soil pH was likely to be the key parameter controlling metal aging in roadside soil.

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