Role of rhizosphere and soil properties for the phytomanagement of a salt marsh polluted by mining wastes

The goal of this study was to evaluate the soil properties and their modifications within the rhizosphere of spontaneous vegetation as key factors to assess the phy tomanagement of a salt marsh polluted by mining wastes. A field survey was performed based on a plot sampling design. The results provided by the analyses of rhizo spheric soil (pH, electrical conductivity (EC), organic carbon, total nitrogen, etc.) and metal(loid)s’ phytoavail ability (assessed by EDTA) were discussed and related to plant metal uptake. The averages of pH and EC values of the bulk soil and rhizospheric samples were in the range of neutral to slightly alkaline (pH 7–8) to saline ([2 dS m-1), respectively. Heavy metal and As concentrations (e.g. 600 mg kg-1 As, 50 mg kg-1 Cd, 11,000 mg kg-1 Pb) were higher in the rhizosphere for both total and EDTA-extractable fraction. Phragmites australis uptaked the highest concentrations in roots (e.g. 66 mg kg-1 As, 1,770 mg kg-1 Zn) but not in shoots, for which most of plant species showed low values for Zn (\300 mg kg-1) but not for Cd ([0.5 mg kg-1) or Pb (20–40 mg kg-1). Vegetation distribution in the studied salt marsh looked to be more affected by salinity than by metal pollution. The free availability of water for plants and the incoming nutrient-enriched effluents which flow through the salt marsh may have hindered the metal(loid)s’ phytotoxicity. The phytomanagement of these polluted areas employing the spontaneous vegetation is a good option in order to improve the ecological indicators and to prevent the transport of pollutants to nearby areas.

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Conesa H.M. Cervantes A.M. Álvarez Rogel J. y González Alcaraz M.N. Role of rhizosphere and soil properties for the phytomanagement of a salt marsh polluted by mining wastes. Springer Nature, 2013. https://doi.org/10.1007/s13762-013-0323-z

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Resource type Article
Date of creation 2024-11-05
Date of last revision 2024-11-05
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Metadata identifier 6c906a03-9a15-5714-a7b1-829623994c85
Metadata language Spanish
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High-value dataset category Earth observation and environment
ISO 19115 topic category biota
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Name of the dataset creator Conesa, H.M., Cervantes, A.M., Álvarez Rogel, J. y González Alcaraz, M.N.
Name of the dataset editor Springer Nature
Other identifier DOI: 10.1007/s13762-013-0323-z
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Email of the dataset creator hector.conesa@upct.es
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