Journal Article10.1007/S00128-017-2170-Y
Exotic Earthworms Decrease Cd, Hg, and Pb Pools in Upland Forest Soils of Vermont and New Hampshire USA
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TL;DR: The results suggest earthworms are decreasing accumulation of Cd, Hg, and Pb in forest soils, potentially via greater mobilization through organic matter disruption or bioaccumulation.
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Abstract: Exotic earthworms are present in the forests of northeastern USA, yet few studies have documented their effects on pollutant metals in soil. The objective of this study was to identify if Cd, Hg, and Pb strong-acid extractable concentrations and pools (bulk inventories) in forest soils decreased with the presence of exotic earthworms. We compared ‘Low Earthworm Abundance’ (LEA) sites (≤10 g m−2 earthworms, n = 13) and ‘High Earthworm Abundance’ (HEA) (>10 g m−2 earthworms, n = 17) sites at five watersheds across Vermont and New Hampshire. Organic horizon Cd, Hg, and Pb concentrations were lower at HEA than LEA sites. Organic horizon and total soil pools of Cd and Hg were negatively correlated with earthworm biomass. Soil profile Cd and Hg concentrations were lower at HEA than LEA sites. Our results suggest earthworms are decreasing accumulation of Cd, Hg, and Pb in forest soils, potentially via greater mobilization through organic matter disruption or bioaccumulation.
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Citations
Earthworms as candidates for remediation of potentially toxic elements contaminated soils and mitigating the environmental and human health risks: A review.
Zengqiang Zhang,Ran Xiao,Ran Xiao,Amjad Ali,Richard O Hynes,Yaqiong Xu,Mortaza Kazemi,Hamada Abdelrahman,Ronghua Li,Yanbing Lin,Nanthi Bolan,Sabry M. Shaheen,Jörg Rinklebe,Zengqiang Zhang +13 more
TL;DR: In this paper, the suitability of earthworms as potential candidates for bioremediation of potentially toxic elements (PTEs) contaminated soils and mitigating environmental and human health risks is discussed.
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Earthworms as candidates for remediation of potentially toxic elements contaminated soils and mitigating the environmental and human health risks: A review
TL;DR: In this paper , the suitability of earthworms as potential candidates for bioremediation of potentially toxic elements (PTEs) contaminated soils and mitigating environmental and human health risks is discussed.
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A tale of three cities: Mercury in urban deciduous foliage and soils across land-uses in Poughkeepsie NY, Hartford CT, and Springfield MA USA.
Justin B. Richardson,Leon Moore +1 more
TL;DR: The results show increasing land-use increases Hg accumulation in urban forests, and industrial areas had highest foliar and soil Hg concentrations and pools of any land use.
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Earthworm impacts on trace metal (Al, Fe, Mo, Cu, Zn, Pb) exchangeability and uptake by young Acer saccharum and Polystichum acrostichoides
TL;DR: In this article, earthworms had limited effects on exchangeable and strong acid extractable (total) concentrations and pools of Al, Fe, Cu, Zn, Mo, Pb in non-point source polluted, forest soil horizons (Organic, A, and B) and foliar metals concentrations in young (< 3 years) Acer saccharum and Polystichum acrostichoides at four proximal forests in the Finger Lakes Region of New York.
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Trace Elements in Surface Soils and Megascolecidae Earthworms in Urban Forests Within Four Land-Uses Around Poughkeepsie, New York, USA
TL;DR: Urban forests in commercial uses and land-preserves, earthworm Cd and Pb concentrations were at or above concentrations known to negatively impact small mammal and bird health ( > 10 mg kg−1) with Co and V approaching toxic concentrations.
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