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Colonisation of the rehabilitated Mary Kathleen uranium mine site (Australia) by Calotropis procera: toxicity risk to grazing animals

Citation

Lottermoser, BG, Colonisation of the rehabilitated Mary Kathleen uranium mine site (Australia) by Calotropis procera: toxicity risk to grazing animals, Journal of Geochemical Exploration, 111, (1-2) pp. 39-46. ISSN 0375-6742 (2011) [Refereed Article]

Copyright Statement

Copyright 2011 Elsevier B.V.

DOI: doi:10.1016/j.gexplo.2011.07.005

Abstract

Since the last human interference three decades ago, the shrub Calotropis procera has colonised the rehabilitated Mary Kathleen uranium mine site, northwest Queensland, Australia. The aims of this study were to evaluate the chemical composition of the plant's biomass for its dietary risk to grazing animals. Biogeochemical analyses demonstrate that C. procera acquires higher Ce, La, Ni and especially higher U values in its leaves, stems and flowers when growing on mine wastes and contaminated soils. A comparison of the concentrations of elements in the plant's biomass with maximum allowable dietary levels in the feed of cattle revealed that C. procera acquires natural enrichments of Ca, K, Mg and S in its tissue on background and mine soils, potentially causing harmful effects on stock and wildlife feeding on it. This study demonstrates that large-scale invasion of rehabilitated mine sites by opportunistic, pioneering metallophytes like C. procera may pose a dietary risk to grazing animals.

Item Details

Item Type:Refereed Article
Keywords:rehabilitation, mine sites, mining, uranium, toxicity, risk, metallophytes, Calotropis procera
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Geochemistry not elsewhere classified
Objective Division:Environment
Objective Group:Land and Water Management
Objective Field:Mining Land and Water Management
Author:Lottermoser, BG (Professor Bernd Lottermoser)
ID Code:74925
Year Published:2011
Web of Science® Times Cited:11
Deposited By:Earth Sciences
Deposited On:2011-12-15
Last Modified:2012-09-12
Downloads:0

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