Earthworm impacts on trace metal (Al, Fe, Mo, Cu, Zn, Pb) exchangeability and uptake by young Acer saccharum and Polystichum acrostichoides

摘要: Non-native earthworms are a continued source of environmental change in the northeastern United States that may affect trace metals plant-soil system, with largely unknown effects. We assessed earthworm impacts on exchangeable and strong acid extractable (total) concentrations pools Al, Fe, Cu, Zn, Mo, Pb non-point polluted, forest soil horizons (Organic, A, B) foliar young (< 3 years) Acer saccharum Polystichum acrostichoides at four proximal forests Finger Lakes Region New York. observed decreasing total metal Organic horizon increasing A as function biomass. Earthworms had limited effects B horizon. Foliar were better explained by biomass than but for poorly predicted both concentrations. Our results suggest can uptake some plants, not exchangeability or from changing properties (pH, %SOM, cation exchange capacity). Instead, non-native indirectly alter understory plant metals.