Organic horizon and mineral soil mercury along three clear-cut forest chronosequences across the northeastern USA

Richardson, Justin B.; Petrenko, Chelsea L.; Friedland, Andrew J.

doi:10.1007/s11356-017-0356-9

Cited by 8 publications

(5 citation statements)

References 63 publications

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“…As shown in Figure S1E of the Supporting Information, a high level of Hg is situated in the western rural area, which is consistent with the mineral reserves. Additionally, rich vegetation, especially forest in the countryside, increased the mercury pools . Therefore, natural background effects and atmospheric deposits from mining and smelting might be the dominant contributors to the heavy metal distribution …”

Section: Resultsmentioning

confidence: 99%

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Source Contribution Analysis and Collaborative Assessment of Heavy Metals in Vegetable-Growing Soils

Gan

Miao

Wang

et al. 2018

J. Agric. Food Chem.

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Source quantification of heavy metals in farmland is essential for developing and implementing restoration strategies. We used various data analyses to identify and quantify sources of arsenic, cadmium, chromium, copper, mercury, nickel, lead, and zinc in vegetable-growing soils. A new method of collaborative assessment, combining soil environmental quality and agricultural product safety, showed that approximately 5.20% of cultivation systems were multi-contaminated by heavy metals. The nonlinear relationship between pollution sources and the comprehensive contamination situation was established, deriving from a fitted bivariate model. The model revealed that anthropogenic sources and natural origins accounted for 65.8−86.0 and 34.2−14.0% of the comprehensive pollution, respectively. These results suggested that both human activities and natural factors contributed to the decline of local soil quality and the influence of the former was more substantial than that of the latter.

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Section: Resultsmentioning

confidence: 99%

“…Additionally, rich vegetation, especially forest in the country-side, increased the mercury pools. 45 Therefore, natural background effects and atmospheric deposits from mining and smelting might be the dominant contributors to the heavy metal distribution. 46 Source Apportionment.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Source Contribution Analysis and Collaborative Assessment of Heavy Metals in Vegetable-Growing Soils

Gan

Miao

Wang

et al. 2018

J. Agric. Food Chem.

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“…Second, determining areas of the Critical Zone that sequester large inventories of Hg could be important for protecting sensitive riparian and aquatic ecosystems. However, locating these regions and their stability under different land uses requires further investigation (e.g., Almeida et al, ; Chen et al, ; Cordeiro et al, ; Richardson et al, ).…”

Section: Conclusion and Implications For The Global Hg Biogeochemicamentioning

confidence: 99%

Mercury Sourcing and Sequestration in Weathering Profiles at Six Critical Zone Observatories

Richardson

Aguirre

Buss

et al. 2018

Global Biogeochemical Cycles

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Mercury sequestration in regolith (soils + weathered bedrock) is an important ecosystem service of the critical zone. This has largely remained unexplored, due to the difficulty of sample collection and the assumption that Hg is predominantly sequestered within surface soils (here we define as 0–0.3 m). We measured Hg concentrations and inventories in weathering profiles at six Critical Zone Observatories (CZOs): Boulder Creek in the Front Range of Colorado, Calhoun in the South Carolina Piedmont, Eel River in coastal northern California, Luquillo in the tropical montane forest of Puerto Rico, Shale Hills of the valley and ridges of central Pennsylvania, and Southern Sierra in the Sierra Nevada range of California. Surface soils had higher Hg concentrations than the deepest regolith samples, except for Eel River, which had lower Hg concentrations in surface soils compared to regolith. Using Ti normalization, CZOs with <12% rock‐derived Hg (Boulder Creek, Calhoun, and Southern Sierra) had Hg peaks between 1.5 and 8.0 m in depth. At CZOs with >50% rock‐derived Hg, Eel River Hg concentrations and pools were greatest at >4.0 m in the weathering profile, while Luquillo and Shale Hills had peaks at the surface that diminished within 1.0 m of the surface. Hg and total organic C were only significantly correlated in regolith at Luquillo and Shale Hills CZOs, suggesting that Hg sorption to organic matter may be less dominant than clays or Fe(II) sulfides in deeper regolith. Our results demonstrate the importance of Hg sequestration in deep regolith, below typical soil sampling depths.

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“…Our finding that mineral soil OM at LES is up to 4400 years old, coupled with increasing Hg/OM with depth (Figure 3b), suggests a pre‐industrial origin of mineral soil OM. Although active Hg cycling has been documented in mineral soil (Richardson et al, 2017), LES is typical of most sites globally where the total Hg soil pool represents millennia of Hg deposition, even with contemporary elevated rates.…”

Section: Resultsmentioning

confidence: 99%

“…Although active Hg cycling has been documented in mineral soil (Richardson et al, 2017), LES is typical of most sites globally where the total Hg soil pool represents millennia of Hg deposition, even with contemporary elevated rates.…”

Section: Soil Hg Poolsmentioning

confidence: 99%

Mercury cycling during acid rain recovery at the forested Lesní potok catchment, Czech Republic

Navrátil

Shanley

Rohovec

et al. 2021

Hydrological Processes

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From 2011 to 2019, mercury (Hg) stores and fluxes were studied in the small forested catchment Lesní potok (LES) in the central Czech Republic using the watershed mass balance approach together with internal measurements. Mean input fluxes of Hg via open bulk deposition, beech throughfall and spruce throughfall during the periodwere 2.9, 3.9 and 7.6 μg m−2 year−1, respectively. These values were considerably lower than corresponding deposition Hg fluxes reported in the early years of the 21st century from catchments in Germany. Current bulk precipitation inputs at unimpacted Czech mountainous sites were lower than those in Germany. The largest Hg inputs to the catchment were via litterfall, averaging 22.6 and 17.8 μg m−2 year−1 for beech and spruce stands. The average Hg input, based on the sum of mean litterfall and throughfall deposition, was 23.0 μg m−2 year−1, compared to the estimated Hg output in runoff of 0.5 μg m−2 year−1, which is low compared to other reported values. Thus, only ~2% of Hg input is exported in stream runoff. Stream water Hg was only weakly related to dissolved organic carbon (DOC) but both concentrations were positively correlated with water temperature. The estimated total soil Hg pool averaged 47.5 mg m−2, only 4% of which was in the O‐horizon. Thus Hg in the O‐horizon pool represents 72 years of deposition at the current input flux and 3800 years of export at the current runoff flux. Age‐dating by 14C suggested that organic soil contains Hg from recent deposition, while mineral soil at 40–80 cm depth contained 4400‐year old carbon, suggesting the soil had accumulated atmospheric Hg inputs through millennia to reach the highest soil Hg pool of the soil profile. These findings suggest that industrial era intensification of the Hg cycle is superimposed on a slower‐paced Hg cycle during most of the Holocene.

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Organic horizon and mineral soil mercury along three clear-cut forest chronosequences across the northeastern USA

Cited by 8 publications

References 63 publications

Source Contribution Analysis and Collaborative Assessment of Heavy Metals in Vegetable-Growing Soils

Source Contribution Analysis and Collaborative Assessment of Heavy Metals in Vegetable-Growing Soils

Mercury Sourcing and Sequestration in Weathering Profiles at Six Critical Zone Observatories

Mercury cycling during acid rain recovery at the forested Lesní potok catchment, Czech Republic

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