Journal
ECOLOGICAL MODELLING
Volume 221, Issue 8, Pages 1148-1152Publisher
ELSEVIER
DOI: 10.1016/j.ecolmodel.2010.01.003
Keywords
Heavy metal uptake; Interaction model; Plant mortality; Soil pollution
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Funding
- Xunta de Galicia
- University of Vigo
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The effects of soil contamination by heavy metals are studied by a mathematical interaction model, validated by experimental results. The model relates the dynamics of uptake of heavy metals from soil to plants. The model successfully fitted the experimental data and made it possible to predict the threshold values of total mortality. Data are taken from soil with Cd, Cu and Zn treatments for alfalfa, lettuce, radish and Thlaspi caerulescens, measuring the concentrations in the aboveground biomass of plants. At low concentrations, the effects of heavy metals are moderate, and the dynamics seem to be linear. However, increasing concentrations exhibit nonlinear behaviors. (C) 2010 Elsevier B.V. All rights reserved.
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