Ref ID : 5990
F. Marino, A. Ligero, and D.J. Diaz Cosin; Heavy metals and earthworms on the Border of a road next to Santiago (Galicia, northwest of Spain). Initial results. Soil Biol.Biochem. 24(12):1705-1709, 1992
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The concentration of some heavy metals in the soil and earthworms existing on the border of a road next to the city of Santiago de Compostela was investigated. Three points which were at 3, 15 and 30 m from the border of the road were sampled in February, May and November 1988. In June, the traffic was diverted as a consequence of a rectification in the road. Heavy metals were determined by atomic absorption spectrophotometry. Interspecific differences were observed among the five studied species Allolobophora caliginosa (Savigny, 1826), A. rosea (Savigny, 1826), Dendrobaena madeirensis (Michaelsen, 1891), D. octaedra (Savigny, 1826) and Lumbricus friendi (Cognetti, 1904). Four metals were studied, copper, lead, cadmium and zinc. Cadmium and zinc were concentrated, copper and lead were accumulated by earthworms.