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- Title
Earthworm impacts on trace metal (Al, Fe, Mo, Cu, Zn, Pb) exchangeability and uptake by young <italic>Acer saccharum</italic> and <italic>Polystichum acrostichoides</italic>.
- Authors
Richardson, Justin B.; Blossey, Bernd; Dobson, Annise M.
- Abstract
Non-native earthworms are a continued source of environmental change in the northeastern United States that may affect trace metals in the plant-soil system, with largely unknown effects. We assessed earthworm impacts 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) <italic>Acer saccharum</italic> and <italic>Polystichum acrostichoides</italic> at four proximal forests in the Finger Lakes Region of New York. We observed decreasing total trace metal Organic horizon pools and increasing total trace metal A horizon concentrations as a function of increasing earthworm biomass. Earthworms had limited effects on exchangeable concentrations in A and B horizons and total metal concentrations in the B horizon. Foliar trace metal concentrations in <italic>Acer</italic> were better explained by earthworm biomass than soil concentrations but foliar concentrations for <italic>Polystichum</italic> were poorly predicted by both earthworm biomass and soil metal concentrations. Our results suggest that earthworms can affect trace metal uptake by some plants, but not by increasing soil trace metal exchangeability or from changing soil properties (pH, %SOM, or cation exchange capacity). Instead, non-native earthworms may indirectly alter understory plant uptake of trace metals.
- Subjects
PLANT-soil relationships; EARTHWORMS; TRACE metals; SUGAR maple; POLYSTICHUM; SOIL ecology
- Publication
Biogeochemistry, 2018, Vol 138, Issue 2, p103
- ISSN
0168-2563
- Publication type
Article
- DOI
10.1007/s10533-018-0434-1