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Revista de Ciências Agrárias
versão impressa ISSN 0871-018X
Resumo
BUJAN, E.; GARCIA-ARRESE, A.; VELASCO-MOLINA, M. e MACIAS, F.. Soil solution in soils under Erica andevalensis formations in the Riotinto mining area (Huelva, SW Spain). Rev. de Ciências Agrárias [online]. 2010, vol.33, n.1, pp.111-118. ISSN 0871-018X.
Erica andevalensis is an endemic heather in the Iberian Pyrite Belt listed as endangered species by Junta de Andalucía (Decree 104/1994, Law 8/2003) which grows spontaneously in mining areas. The study of soil solution may be a useful tool to characterize the geochemical conditions of its habitat. We analyzed the soil solution of 11 plots from two mining areas in Riotinto. Ion speciation was obtained using the SOLMIN88 software. Our results indicate that it grows adequately under a wide range of conditions, being tolerant to ionic strength until up to 10-2 M, soil solutions ranging from hyperacid (3.43) to neutral (6.97) and with variable ions (sulphate 4-376, Ca 0.3-25 and Mg 0.1-25 mg L-1) and metals (Al 0.1-10, Cu 0.01-3.94, Pb 0.01-0.23, Zn 0.01-1.88 y Mn 0.02-2.81 mg L-1) concentrations. This species seems to be indifferent to the dominant cation of the soil solution. The Al-tolerant character of this species was also confirmed.
Palavras-chave : Erica andevalensis; habitat; mine soils; soil solution.